UNITED STATES
 SECURITIES AND EXCHANGE COMMISSION
 Washington, D.C. 20549
 FORM 10-K
 (Mark One)

 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the fiscal year ended December 31, 2023
 OR

 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the transition period from to
 Commission file number 1-15295
 TELEDYNE TECHNOLOGIES INC ORPORATED
 (Exact name of registrant as specified in its charter)
 Delaware

 25-1843385

 (State or other jurisdiction of incorporation of organization)

 (I.R.S. Employer Identification Number)

 1049 Camino Dos Rios

 Thousand Oaks,
 California
 91360-2362

 (Address of principal executive offices)
 (Zip Code)

 Registrant's telephone number, including area code: ( 805) 373-4545

 Securities registered pursuant to Section 12(b) of the Act:

 Title of each class
 Trading Symbol(s)
 Name of each exchange on which registered

 Common Stock, par value $.01 per share
 TDY
 New York Stock Exchange

 Securities registered pursuant to Section 12(g) of the Act: None
 Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes No
 Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes No
 Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes No
 Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes No
 Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer", "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.
 Large accelerated filer Accelerated filer Non-accelerated filer Smaller reporting company Emerging growth company
 If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant Section 13(a) of the Exchange Act
 Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.
 If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.
 Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b).
 Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes No
 As of June 30, 2023, the aggregate market value of Common Stock (based upon closing price of the stock on the New York Stock Exchange) of the registrant held by non-affiliates was approximately $ 18.9 billion.
 At February 16, 2024, there were 47,376,363 shares of the registrant's Common Stock outstanding.
 DOCUMENTS INCORPORATED BY REFERENCE
 Portions of the registrant's proxy statement to be filed subsequently with the Securities and Exchange Commission pursuant to Regulation 14A for the 2024 Annual Meeting of Stockholders are incorporated by reference in Part III of this Annual Report on Form 10-K. Except as expressly incorporated by reference, the registrant's proxy statement shall not be deemed to be part of this report.

 Page Number

 Item 1. Business

 Item 1A. Risk Factors

 Item 1B. Unresolved Staff Comments

 Item 1C. C ybersecurity

 Item 2. Properties

 Item 3. Legal Proceedings

 Item 4. Mine Safety Disclosures

 Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

 Item 6. [ Reserved]

 Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation s

 Item 7A. Quantitative and Qualitative Disclosures About Market Risk

 Item 8. Financial Statements and Supplementary Data

 Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

 Item 9A. Controls and Procedures

 Item 9B. Other Information

 Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

 Item 10. Directors, Executive Officers and Corporate Governance

 Item 11. Executive Compensation

 Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

 Item 13. Certain Relationships and Related Transactions, and Director Independence

 Item 14. Principal Accountant Fees and Services

 Item 15. Exhibits and Financial Statement Schedules

 Index to Financial Statements and Related Information

 Item 16. Form 10-K Summary

 Exhibit Index

 Signatures

 Explanatory Notes
 In this Annual Report on Form 10-K, Teledyne Technologies Incorporated is referred to as the "Company", "Teledyne", "we", "our" or "us". For a discussion of risk factors and uncertainties associated with Teledyne and any forward-looking statements made by us, see the discussion beginning on page 6 of this Annual Report on Form 10-K. In this document, for any references to Note 1 through Note 18, refer to the Notes to Consolidated Financial Statements in this Annual Report on Form 10-K.

 i

 Item 1.
 Business

 Who We Are
 Teledyne Technologies Incorporated is a Delaware corporation that provides enabling technologies for industrial growth markets that require advanced technology and high reliability. These markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research. Our products include digital imaging sensors, cameras and systems within the visible, infrared and X-ray spectra, monitoring and control instrumentation for marine and environmental applications, harsh environment interconnects, electronic test and measurement equipment, aircraft information management systems, and defense electronics and satellite communication subsystems. We also supply engineered systems for defense, space, environmental and energy applications. We differentiate ourselves from many of our direct competitors by having a customer- and Company-sponsored applied research center that augments our product development expertise. We believe our technological capabilities, innovation and ability to invest in the development of new and enhanced products are critical to obtaining and maintaining leadership in our markets and the industries in which we compete. We became an independent public company effective November 29, 1999.
 The following description of our business should be read together with "Management's Discussion and Analysis of Financial Condition and Results of Operations" within Item 7 of this Form 10-K.
 Recent Developments
 Consistent with our strategy, we completed two acquisitions each in 2023 and in 2022. The financial results of these acquisitions have been included since the respective date of each acquisition. Our 2023 acquisitions were within the Digital Imaging and Instrumentation segments, and both acquisitions in 2022 were part of the Digital Imaging segment. See Note 3 for additional information about our recent business acquisitions.
 Our Business Segments
 Our businesses are aligned in four segments: Digital Imaging, Instrumentation, Aerospace and Defense Electronics and Engineered Systems. Additional financial information about our business segments can be found in Note 4.

 Percentage of Total Net Sales

 Segment contribution to total net sales:
 2023
 2022
 2021

 %
 %
 %

 %
 %
 %

 %
 %
 %

 %
 %
 %

 %
 %
 %

 Digital Imaging Segment
 Our Digital Imaging segment includes high-performance sensors, cameras, and systems, within the visible, infrared, ultraviolet and X-ray spectra for use in industrial, scientific, government, space, defense, security, medical and other applications. We also produce and provide manufacturing services for micro electromechanical systems ("MEMS") and high-performance, high-reliability semiconductors including analog-to-digital and digital-to-analog converters, as well as unmanned aerial and ground systems. This segment also includes our customer- and Company-sponsored applied research center.
 Through this segment, we provide visible spectrum sensors and digital cameras for industrial machine vision and automated quality control, as well as for medical, research and scientific applications. We provide a range of cooled and uncooled infrared or thermal products, including sensors, camera cores and camera systems based on long wave infrared, mid-wave infrared, and short wave infrared technologies. Products and applications include space-based imaging, factory condition monitoring, optical and acoustic-based gas leak detection, laboratory research and maritime thermal imaging. We develop high-resolution, low-dose X-ray sensors as well as high-power microwave and high-energy X-ray subsystems for medical, dental and industrial applications. We also provide instruments for the measurement of physical properties and maritime products for recreational and commercial customers globally.
 We provide research and engineering capabilities primarily in the areas of electronics, materials, optical systems, and information science to military, aerospace and industrial customers, as well as to various businesses throughout Teledyne.
 For defense applications, we also develop and manufacture multi-spectrum electro-optic/infrared imaging systems and associated products such as lasers, optics, and radars, CBRNE ("Chemical, Biological, Radiological, Nuclear and Explosive detectors") and unmanned air and ground systems. These sensors and instruments can be deployed as integrated solutions and with advanced target detection, identification and classification capabilities. We provide solutions for threat protection, military maneuver and force protection, border controls and homeland security, law enforcement, public safety, and commercial applications worldwide.

 Instrumentation Segment
 Our Instrumentation segment provides monitoring and control instruments for marine, environmental, industrial and other applications, and electronic test and measurement equipment. We also provide power and communications connectivity devices for distributed instrumentation systems and sensor networks deployed in mission critical, harsh environments. Below is a description of the product lines that comprise the Instrumentation segment.
 Marine Instrumentation
 We offer a variety of products designed for use in harsh underwater environments, instruments that measure currents and other physical properties in the water column, systems that create acoustic images of objects beneath the water's surface, including the bottom of a body of water, instruments for navigation and sensors that determine the geologic structure below the bottom. We also design and manufacture vehicles that utilize and transport these sensors over and beneath the water's surface.
 We provide a broad range of end-to-end undersea interconnect solutions to the offshore oil and gas, naval defense, oceanographic and telecom markets. We manufacture subsea, wet-mateable electrical and fiber-optic interconnect systems and subsea pressure vessel penetrators and connector systems with glass-to-metal seals. Our waterproof and splash-proof neoprene and glass reinforced epoxy connectors and cable assemblies are used in underwater equipment, submerged monitoring systems and other industrial and defense applications. Other marine products used by the U.S. Navy and commercial customers include acoustic modems for networked underwater communication and optical underwater cameras and LED lighting sources.
 We manufacture complete autonomous-operated underwater vehicles systems. Glider applications range from oceanographic research to persistent surveillance systems for the U.S. Navy. We also design and manufacture remotely operated underwater vehicles used in maritime security, military, search and rescue, aquaculture, and scientific research applications.
 Environmental Instrumentation
 We offer a wide range of products used for environmental monitoring. Our instrumentation monitors trace levels of gases such as sulfur dioxide, carbon monoxide, oxides of nitrogen and ozone, as well as particulate pollution, in order to measure the quality of the air we breathe. We supply monitoring systems for the detection, measurement and automated reporting of air pollutants from industrial stack emissions, ozone generators and other process gas monitoring instruments. We also supply water monitoring systems for wastewater monitoring and detection of water-borne pathogens and contaminants of concern. Our instrumentation is used to detect a variety of water quality parameters and in applications found in petrochemical and refinery facilities.
 We also manufacture and provide complementary laboratory instrumentation including through laboratory automation and sample introduction systems that automate the preparation and concentration of organic samples.
 Our advanced elemental analysis products are used by environmental and quality control laboratories to detect trace levels of inorganic contaminants in water, foods, soils and other environmental and geological samples. We manufacture high-precision pumps utilized in a wide variety of analytical, research clinical, preparative and fluid-metering applications. In addition, we manufacture liquid chromatography instruments and accessories for the purification of organic compounds, which include highly sensitive evaporative light scanning detectors, primarily for pharmaceutical laboratories involved in drug discovery and development. We manufacture instruments that are used by pharmaceutical scientists to evaluate the release rate characteristics and physical properties of various dosage forms to ensure the safety and efficacy of medicines worldwide.
 Finally, we manufacture fixed and portable industrial gas and flame detection instruments used in a variety of industries including petrochemical, power generation, oil and gas, food and beverage, mining and wastewater treatment.
 Test and Measurement Instrumentation
 Our test and measurement products provide capabilities that enable the designers of complex electronic systems in many industry sectors to bring their products to market reliably and quickly. Our customers use our equipment in the design, development, manufacture, installation, deployment and operation of electronics equipment in a broad range of industries, including aerospace and defense, internet infrastructure, automotive, industrial, computer and semiconductor, consumer electronics mobile and power electronics.
 We develop, manufacture, sell and license high-performance oscilloscopes, high-speed protocol analyzers, and related test and measurement solutions for a wide range of industries. Our oscilloscopes are used by designers and engineers to measure and analyze complex electronic signals to develop high-performance systems, validate high data-rate communication interfaces, qualify their electronic designs, and improve time-to-market. We also make high-speed, high-resolution modular analog-to-digital conversion systems for applications, including test and measurement, scientific instruments, medical imaging, and distributed sensing systems.
 Design and test engineers use our protocol analysis solutions to monitor accurately and reliably high data-rate communication interfaces and diagnose operational problems in a wide range of systems and devices to ensure that they comply with industry standards, including in the areas of cloud computing, storage and networks. Our leadership in USB and video technologies provides a unique base to service the mobile, internet of things, automotive and consumer electronics test markets. We also produce protocol validation and test tools for high-performance solid-state storage devices used in both enterprise-

 grade data centers and in consumer computing applications. Our recently introduced interposers and software options allow engineers to get a complete picture when testing the PCI Express interface standard by enabling a link between an oscilloscope and a protocol analyzer.
 We also manufacture torque sensors and automatic data acquisition systems that are used to test critical control valves in nuclear power and industrial plants. Our torque sensors are also used in other markets, including automotive and power tools.
 Aerospace and Defense Electronics Segment
 Our Aerospace and Defense Electronics segment provides sophisticated electronic components and subsystems, data acquisition and communications components and equipment, harsh environment interconnects, general aviation batteries and other components for a variety of commercial and defense applications that require high performance and high reliability. Such applications include aircraft, radar, electronic countermeasures, weapon systems, space, wireless and satellite communications and terminals and test equipment.
 We provide onboard avionics systems and ground-based applications that allow civil and military aircraft software operators to access, manage and utilize their data more efficiently. Our products include aircraft data and connectivity solutions, hardware systems, and software applications used by commercial airlines and the U.S. military, and we provide services related to our products.
 Engineered Systems Segment
 Our Engineered Systems segment provides innovative systems engineering, integration and advanced technology development, and complex manufacturing solutions for defense, space, environmental and energy applications. This segment also designs and manufactures electrochemical energy systems and manufactures specialty electronics for demanding military applications.
 Our core business base includes National Aeronautics and Space Administration ("NASA"), the U.S. Department of Defense, the U.S. Department of Energy, foreign militaries and commercial customers.
 Customers
 We have a broad and diversified customer base in the various markets we serve. No commercial customer in 2023 or 2022 accounted for more than 10% of net sales for any of our segments or for the total Company.
 Total sales to international customers were $2,740.1 million in 2023 and $2,586.0 million in 2022. Of these net sales to international customers, our businesses in the United States accounted for $900.5 million in 2023 and $837.9 million in 2022.
 In both 2023 and 2022, we sold products to customers in over 100 foreign countries. Approximately 90% of our net sales to international customers during 2023 were made to customers in 30 foreign countries. In 2023, the top five countries for sales to international customers, ranked by net sales, were the United Kingdom, China, Japan, Germany and Norway and represented approximately 21% of our total net sales. There were no sales to individual countries outside of the United States in excess of 10% of the Company's sales.
 Information on our net sales to the U.S. Government, including direct sales to agencies as a prime contractor and indirect sales as a subcontractor, was as follows (in millions):
 U.S. Government sales by segment:
 2023
 2022
 2021

 $
 570.7
 $
 619.1
 $
 515.9

 95.9
 108.1
 91.6

 330.3
 266.3
 227.2

 384.8
 366.4
 358.4

 Total U.S. Government sales
 $
 1,381.7
 $
 1,359.9
 $
 1,193.1

 Total U.S. Government sales as a percent of total net sales
 24.5
 %
 24.9
 %
 25.9
 %

 Our principal U.S. Government customer is the U.S. Department of Defense, with total net sales of $1,081.3 million and $1,065.1 million in 2023 and 2022, respectively. With the exception of the Engineered Systems segment, no U.S Government program in 2023 or 2022 accounted for more than 10% of net sales for any of our segments or for the total Company. In 2023, the largest program with the U.S. Government within the Engineered Systems segment was the Marshall Operations, Systems, Services, and Integration II ("MOSSI II") contract with the NASA Marshall Space Flight Center, which represented approximately 17% of Engineered Systems net sales. In 2022, the largest program with the U.S. Government within the Engineered Systems segment was the Mission Operations and Integration contract with the NASA Marshall Space Flight Center, which represented approximately 11% of Engineered Systems net sales.
 As described in greater detail under Item 1A. Risk Factors, there are risks associated with doing business with the U.S. Government. In 2023, approximately 79% of our U.S. Government prime contracts and subcontracts were fixed-price type contracts, compared to 80% in 2022, with the remaining U.S. Government contracts related to cost-reimbursable contracts ("cost-type") contracts. Under fixed-price type contracts, we bear the inherent risk that actual performance cost may exceed the fixed contract price. Such contracts are typically not subject to renegotiation of profits if we fail to anticipate technical problems, estimate costs accurately or control costs during performance. Additionally, U.S. Government contracts are subject

 to termination by the U.S. Government at its convenience, without identification of any default. When contracts are terminated for convenience, we can recover costs incurred or committed, settlement expenses and profit on work completed prior to termination. During 2023 and 2022, contracts terminated by the U.S. Government did not materially impact our results of operations.
 Many of our government contracts are awarded after a competitive bidding process in which we seek to emphasize our ability to provide superior products and technical solutions.
 Raw Materials and Suppliers
 Most raw materials used in our operations are readily available; however, we have experienced supply chain challenges in recent years, including increased lead times, as well as cost inflation for parts and components, logistics and labor due to availability constraints and high demand. Some raw materials are purchased from a limited set of suppliers, including international sources, due to technical capability, price, and other factors. We leverage our existing supplier relationships and are not dependent on any one supplier for a material amount of our purchases. While some of our businesses provide services, for those businesses that sell products, a portion of the value that we provide is labor-oriented, such as design, engineering, assembly and test activities. In manufacturing our products, we use our own production capabilities and third-party suppliers and subcontractors, including international sources.
 Marketing
 Our sales and marketing approach varies by segment and by products within our segments. A shared fundamental tenet is the commitment to work closely with our customers to understand their needs, with an aim to secure preferred supplier and longer-term relationships. Given the technical nature of our products, we conduct our marketing activities through a direct internal sales force as well as third-party sales representatives and distributors. Several Teledyne businesses, including across our segments, have been marketing and selling products collaboratively to similar customers.
 Competition
 Because of the diversity of products sold and the number of markets we serve, we encounter a wide variety of
 competitors, none of which we believe offer the same product and service lines or serve all of the same markets as we do. Although we have certain advantages that we believe help us compete effectively in our markets, each of our markets is highly competitive. Our businesses compete on quality, product performance and reliability, technical expertise, price and service. Many of our competitors have, and potential competitors could have, greater name recognition, a larger installed base of products, more extensive engineering, manufacturing, marketing and distribution capabilities and greater financial, technological and personnel resources than we do.
 Intellectual Property
 We own and control various intellectual property rights, including patents, trade secrets, confidential information, trademarks, trade names, and copyrights. We license patents, technology and other intellectual property rights owned and controlled by others. Similarly, other companies license patents, technology and other intellectual property rights owned and controlled by us. We do not consider any single patent or trademark, or any group of them, essential either to Teledyne's business as a whole or to any one of our reportable segments. The annual royalties received or paid under license agreements are not significant to any of our reportable segments or to our overall operations.
 Patents, patent applications and license agreements will expire or terminate over time by operation of law, in accordance with their terms or otherwise. We do not expect the expiration or termination of these patents, patent applications and license agreements to have a material adverse effect on our business, results of operations or financial condition.
 Environment and Other Government Regulations
 Information with respect to environmental matters is set forth under "Other Matters – Environmental" of " Item 7. Management's Discussion and Analysis of Results of Operation and Financial Condition" and Note 17. No material capital expenditures relating to environmental compliance are presently anticipated. See Note 17 for additional discussion of other government regulations.
 Sustainability
 Teledyne continues to focus on developing solutions to address sustainability and climate challenges facing humanity today. Many of our products directly support sustainability and climate challenges. We provide a broad range of precision measurement technologies for environmental monitoring and climate research. Our sensors and instruments are deployed everywhere: in space, on aircraft and drones, on land, on the sea surface, in the water column, and on the seafloor. They operate around the clock, measuring greenhouse gases from space, precisely monitoring air and water quality throughout the world, and continuously profiling the Earth's oceans. Applications of our instruments provide scientists information that spans

 time from the origin of the universe to providing real-time data regarding air pollution and dangerous storms, such as time-critical warning of hurricanes and tsunamis.
 The prominence and importance of sustainability and Environmental, Social and Governance ("ESG") initiatives have dramatically increased. In November 2022, we published our second Corporate Social Responsibility ("CSR") report, in which we disclose and highlight some of our most recent efforts focused on sustainability and ESG. We published a supplement to the CSR report in November 2023 to include updated financial information and other information in the report. The CSR report together with its supplement, which is not incorporated by reference in this document, is available at the Corporate Social Responsibility link on our website at www.teledyne.com under the tab "Who We Are". The CSR Report and its supplement includes data on Teledyne's combined direct emissions ("Scope 1") and indirect emissions from purchased energy ("Scope 2"), workplace safety, water usage, waste generation and recycling and workplace demographics.
 In 2021, we compiled the first global inventory of our greenhouse gas ("GHG") emissions (starting with fiscal year 2020) and have developed a GHG monitoring and management plan. We have set a goal to reduce our combined Scope 1 and Scope 2 in company operations, normalized for revenue, by 40% from 2020 levels by the end of 2040. Going forward, we will continue to evaluate our emission reduction goals, while at the same time providing the tools and technologies enabling environmental science and climatology across the globe. More information about our carbon footprint and GHG emission reduction efforts and goals, and the contributions that Teledyne products make to carbon monitoring and environmental and climate science, can be found in our CSR report.
 Pursuant to the mandate in their respective charters, the Audit Committee of our Board of Directors (the "Board") regularly reviews matters related to compliance with environmental laws and the health and safety of employees, and the Nominating and Governance Committee of our Board reviews and evaluates our policies and practices and monitors our efforts in areas of legal and social responsibility, diversity and sustainability, and other ESG matters.
 Human Capital
 We consider our relations with our employees to be good. At December 31, 2023, our total workforce consisted of approximately 14,900 employees in 36 countries. Workforce demographics for various regions are provided below:
 Gender (Self-Reported)

 Percent of Total Employees
 Average Age
 Average Years of Service
 Male
 Female
 Not Specified

 Americas
 69%
 48.4
 10.0
 62%
 32%
 6%

 Europe, the Middle East and Africa
 28%
 43.3
 9.9
 62%
 25%
 13%

 Asia-Pacific Region
 3%
 40.7
 8.0
 52%
 23%
 25%

 We have a stable and long-tenured workforce. In 2023, our voluntary employee turnover (excluding reductions in force) was approximately 10%. As of December 31, 2023, the average years of service of our employees was approximately 10 years.
 Employees are vital to the success of our growth strategy. Our goal is to maintain a safe, hospitable and inclusive work environment in which every employee is encouraged to contribute to the success of the company. We are focused on attracting, developing, and retaining employees through competitive compensation and benefits, workforce and management development, diversity and inclusion initiatives, succession planning, corporate culture and leadership quality.
 Teledyne has a Corporate-led committee to oversee our diversity, equity and inclusion efforts. The committee focuses on activities and initiatives to increase diverse representation and progression within our company. Various initiatives include developing relationships with universities with higher underrepresentation, creating more diverse and larger talent pools, and increasing networking and referrals with diverse professional organizations. We advertise vacancies and strive to recruit the best possible candidate for each role. We monitor diversity metrics on a global basis.
 The health and wellness of our employees is a critical component to the success of our business. Many of our larger facilities have on-site fitness centers and encourage healthy choices with various wellness challenge programs. These programs often include guest speakers on various topics, including mental health, heart disease, diabetes, and personal financial awareness. We also have vacation and sick leave policies that provide employees with flexibility to take time away from work for relaxation or to recover from illness. The majority of our employees (including all full-time employees in the U.S., Canada and the United Kingdom) have access to our employee assistance program which includes third-party counseling and mental health services at no cost to the employee when life events impact an employee.
 We are committed to identifying and developing the talents of our next generation of leaders. On an annual basis, we conduct an organization and leadership review for all segment, business unit, and function leaders, focusing on our high performing and high potential talent, diversity and succession for our most critical roles. From this review, individualized development and retention programs are implemented or revised as needed. We also provide additional opportunities for our existing employees to enhance their careers. We invest in employee skills development in various ways, including through educational expense reimbursement. Specialized training in a job-related field gives employees new skills and a strong

 foundation of knowledge that can serve them throughout their career and that may allow them to progress to more responsible positions at Teledyne. Our employees have access to Teledyne University, a learning platform. The database of courses, webinars, and certification programs has hundreds of targeted training programs on management, technical competencies, soft skills development, and compliance.
 Available Information
 Teledyne's website is www.teledyne.com. We make available on our website, free of charge, annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") as soon as reasonably practicable after we electronically file or furnish such material to the U.S. Securities and Exchange Commission (the "SEC") at www.sec.gov. We will provide, free of charge, a paper copy of any report we file with the SEC (without exhibits) upon written request to Melanie S. Cibik, Executive Vice President, General Counsel, Chief Compliance Officer and Secretary, at Teledyne Technologies Incorporated, 1049 Camino Dos Rios, Thousand Oaks, California 91360-2362. We have included our website addresses throughout this report as inactive textual references only. The information contained on the websites referenced herein is not incorporated into this Form 10-K.

 Item 1A.
 Risk Factors

 Risk Factors
 The following discussion sets forth the material risk factors that could affect Teledyne's financial condition and
 operations. You should not consider any descriptions of these factors to be a complete set of all potential risks that could affect Teledyne. Any of the risk factors discussed below could by itself, or combined with other factors, materially and adversely affect our business, results of operations, financial condition, competitive position or reputation, including by materially increasing expenses or decreasing revenues, which could result in material losses or a decrease in earnings.
 Risks Related to our Business and Industry
 A possible recession in the U.S. or globally, continued economic slowdown in China, and higher interest rates may adversely affect us.
 If another global recession emerges, or if economic growth in China continues to slow, we may experience declines in revenues, profitability and cash flows from reduced orders, payment delays, collection difficulties, increased price pressures for our products, increased risk of excess and obsolete inventories or other factors caused by the economic problems of our customers. Economic growth in China had slowed since the COVID pandemic. Continued growth in many of our businesses, including those in our Environmental Instrumentation group, could be negatively impacted if another economic downturn occurs in China.
 We develop and manufacture products for customers in the energy exploration and production markets, commercial aerospace markets, the semiconductor industry, and the consumer electronics, telecommunications and automotive industries; each of which has been cyclical, exhibited rapid changes and suffered from fluctuating market demands. A cyclical downturn in these markets may materially affect future operating results. The current cyclical downturn in the semiconductor market has impacted the results of our digital imaging and instrumentation businesses. While this market is expected by many to recover later in 2024, a delay in recovery may adversely impact our results of operations. We also face risk that our addressable market for retrofit products will shrink further as airlines retire a significant number of aircraft in order to replace them with newer, more fuel-efficient planes.
 In addition, we sell products and services to customers in industries that are sensitive to the level of general economic activity and consumer spending habits. Adverse economic conditions affecting these industries may reduce demand for our products and services, which would reduce our revenues. Reduced demand for mobile phones and other consumer electronics will result in lower sales of our cameras and sensors products in our Digital Imaging segment. Higher interest rates may reduce capital spending by our existing and potential customers. Some of our businesses serve industries such as power generation and petrochemical refining, which may be negatively impacted in the event of future reductions in global capital expenditures and manufacturing capacity, or as a result of global environmental sustainability efforts. Slower consumer spending in healthcare markets, reduced hospital budgets and high existing inventories of medical components could result in lower sales for businesses that sell products into this market.
 Acquisitions and our ability to make acquisitions involve inherent risks that may adversely affect our operating results and financial condition.
 Our growth strategy includes acquisitions. Acquisitions involve various inherent risks, such as:
 • our ability to assess accurately the value, strengths, weaknesses, internal controls, contingent and other liabilities and potential profitability of acquisition candidates;
 • difficulties in integrating acquired businesses, including the potential loss of key personnel from an acquired business, our potential inability to achieve identified financial, operating and other synergies anticipated to result from an acquisition, and integration issues associated with internal controls of acquired businesses;

 • the diversion of management's attention from our existing businesses;
 • the potential impairment of assets;
 • potential unknown liabilities associated with a business that we acquire or in which we invest, including environmental liabilities;
 • new and proposed regulations limiting the enforcement of noncompetition and nonsolicitation agreements; and
 • production delays associated with consolidating acquired facilities and manufacturing operations;
 • pre-existing vulnerabilities, undetected malware and access management issues at the acquired business and supply chain.
 While we conduct financial and other due diligence in connection with our acquisitions and generally seek some form of protection, such as indemnification from the seller, insurance coverage, and sometimes placing a portion of the purchase price in escrow or a holdback arrangement to cover potential liabilities, such acquired companies may have weaknesses or liabilities that are not accurately assessed or brought to our attention at the time of the acquisition. Further, indemnities, insurance, escrow or holdback arrangements may not fully cover such matters. Acquisitions of public companies, such as our acquisition of FLIR in 2021, typically do not include post-closing indemnities or escrows.
 In connection with our acquisitions, including those acquisitions that we do not complete, we may incur significant transaction costs. We are required to expense such transaction costs as incurred, which may have a material adverse impact on our financial results.
 If we are unable to make acquisitions our future growth may be adversely impacted. Our ability to make acquisitions depends on a number of factors, including the availability of potential acquisition candidates at reasonable prices, competition from other bidders, the ability to obtain regulatory approvals, including under merger control and foreign direct investment laws, and the availability of debt and equity financing, among other factors. For additional discussion of business acquisition, see the discussion under "Item 7. Management's Discussion and Analysis of Operations and Financial Condition" and Note 3.
 Increased prices for components and raw materials used in our products and higher labor and shipping costs could adversely impact our profitability.
 Inflation and recent supply chain constraints have resulted in sustained increases in the prices we pay for many of the components and raw materials used in our products. In addition, we are experiencing higher labor costs due to increased competition for personnel in many regions in which we operate as well as general inflationary conditions, and higher shipping costs due to labor and rising energy prices. We expect inflationary pressures to persist in 2024, albeit at a lower rate than in 2023. In response to higher costs, we have in some cases raised prices of our products, which could put these products at a competitive disadvantage. In other cases, we may be unable to adjust our product pricing to reflect such higher costs. If we are unable to increase our product prices enough to offset these increased costs, our gross margins and profitability could decrease, perhaps significantly over a sustained period of time.
 Escalating global trade tensions, especially between the U.S. and China, the conflict between Russia and Ukraine, the conflict in Israel and neighboring regions and the adoption or expansion of tariffs and trade restrictions could negatively impact us.
 Our net sales to China-based customers represented approximately 4.7% and 5.4%. of total revenues in 2023 and 2022, respectively. Any tariffs or other trade restrictions affecting the import of products from China or any retaliatory trade measures taken by China in response to existing or future tariffs could have a material adverse effect on our results of operations.
 Starting in 2018, the U.S. Government imposed tariffs on a wide range of goods imported from China, and China has retaliated by placing tariffs on various U.S. origin goods. While both countries signed a preliminary trade agreement in January 2020 halting further tariffs and increasing sales of U.S. goods to China, the agreement leaves in place most tariffs on Chinese goods.
 Further escalation of the "trade war" between the U.S. and China, or the countries' inability to reach further trade agreements, could result in continued or increased tariffs. High tariffs generally increase the cost of materials for our products, which could result in our products becoming less competitive or generating lower margins. With high tariffs imposed on our products, we may also need to find new suppliers and components for our products, which could result in production delays. To the extent our products are the subject of retaliatory tariffs, customers in some countries or regions, such as China, may begin to seek domestic or non-U.S. sources for products that we sell, or be pressured or incentivized by foreign governments not to purchase U.S.-origin goods, which could harm our future sales in these markets. Additionally, many countries, including China, India and Saudi Arabia, have bolstered laws or regulations requiring the use of local suppliers and in-country manufacturing, which has had a negative impact on Teledyne's revenues of instrumentation, commercial aerospace, marine and digital imaging products, as we currently have limited manufacturing operations in these countries.
 Additionally, recent export restrictions have had a significant impact on business as well. A number of well-established customers and suppliers have become listed on government restricted party lists. In particular, U.S. export enforcement agencies have placed several Chinese companies and many of their international subsidiaries on such lists, prohibiting the export to them of most commercial and dual-use items subject to the Export Administration Regulations. Furthermore, the U.S.

 has imposed certain sectoral sanctions to limit Chinese development and manufacturing of semiconductor and supercomputer technology and have imposed comprehensive restrictions of both U.S.-origin items as well as non-U.S. items manufactured from U.S.-origin equipment. In response, China has unveiled restrictions on exports from China of certain materials and components, including gallium and germanium which are used in semiconductor manufacturing. These and other tariffs, trade restrictions and retaliatory measures could result in revenue reduction, price increases on material used in our products or production delays, which could adversely affect our business, financial condition, operational results and cash flows.
 Sanctions on Russia imposed by multiple countries and related Teledyne policies have led to a comprehensive ban on commercial activity with that market. The continuing conflict between Russia and Ukraine could lead to further disruption, instability and volatility in global markets and industries that could negatively impact our operations. Energy market disruptions and shortages caused by the war could result in the shutdown of or slowdowns at our manufacturing facilities, particularly those located in Europe, and may result in substantial increases in the cost of energy. The U.S. Government and other governments in jurisdictions in which we operate have imposed severe sanctions and export controls against Russia and Russian interests and threatened additional sanctions and controls. The impact of these measures, as well as potential responses to them by Russia, is currently unknown and they could adversely affect our business, supply chain, partners or customers.
 The conflict in Israel and neighboring regions could have a material impact on our business, especially if it escalates into a wider regional conflict. The conflict has resulted in some supply delays resulting from disruptions in shipping routes using the Red Sea and Suez Canal and could lead to higher energy prices and disruptions for suppliers and customers located in the region. Pro-Palestinian activist groups have targeted the facilities of defense companies, including our sites. Actions taken by these groups have the potential to disrupt activity and temporarily halt production at the sites targeted.
 A military conflict between China and Taiwan would likely have a material adverse impact on our ability to sell products to customers in these areas and on our supply chain.
 We are subject to the risks associated with international sales and international operations, and events in those countries could harm our business or results of operations.
 In 2023 and 2022, sales to customers outside the United States accounted for approximately 49% and 47% of total net sales, respectively. In both 2023 and 2022, we sold products to customers in over 100 foreign countries. In 2023, the top five countries for sales to international customers, ranked by net sales, were the United Kingdom, China, Japan, Germany and Norway and represented approximately 21% of our total net sales. We anticipate that future sales to international customers will continue to account for a significant and increasing percentage of our revenues, particularly since business and growth plans for many Teledyne businesses focus on sales outside of the United States including to emerging markets such as India, Brazil and West Africa.
 Risks associated with international sales and operations include, but are not limited to:
 • political and economic instability, including the war between Ukraine and Russia, the conflict in Israel and neighboring regions and potential hostilities between China and Taiwan;
 • international terrorism;
 • global economic sanctions and export controls, including U.S. export controls related to China, sanctions related to Russia, and increased scrutiny of exports of marine instruments, digital imaging and other products;
 • failure to comply with anti-bribery legislation, including the U.S. Foreign Corrupt Practices Act;
 • changes in legal and regulatory requirements, including complex trade compliance regulations;
 • U.S. and foreign government policy changes affecting the markets for our products;
 • changes in tax laws and tariffs;
 • additional deterioration in U.S. - China and U.S. - Russia relations;
 • difficulties in protection and enforcement of intellectual property rights;
 • failure to comply with the foreign data protection laws, including the EU General Data Protection Regulation ("GDPR") in the European Union and the Personal Information Protection Law in China;
 • new and emerging non-U.S. regulations relating to ESG and CSR matters, which could be costly to comply with;
 • inadvertent transfers of export-controlled information due to increased cross-border technology transfers and the use of offshore computer servers;
 • transportation, including piracy in international waters;
 • currency exchange rate fluctuations; and
 • challenges relating to managing a global workforce with diverse cultures, backgrounds and labor laws.
 The impact of these factors is difficult to predict, but one or more of them could have a material adverse effect on our financial position, results of operations, or cash flows.
 Certain international contracts may also include industrial cooperation agreements requiring specific in-country purchases, investments, manufacturing agreements or other financial obligations, known as offset obligations, and may provide for penalties if we fail to meet such requirements.

 Currency exchange rate fluctuations may increase the cost of our products to international customers and therefore reduce our competitive position. In 2022, the value of the U.S. dollar rose dramatically and rapidly in comparison to many currencies in jurisdictions where we sell our products. In addition to making our products manufactured in the U.S. more expensive, a stronger dollar impacts the value of our foreign profits when translated back into dollars. Since we report our financials in U.S. dollars, volatility in the strength of the U.S. dollar could have a material impact on our reported earnings.
 Subsequent to the U.K. exiting the European Union ("E.U.") in 2020, the E.U. and U.K. have entered into a Trade and Cooperation Agreement ("TCA"). The TCA ensures tariff-free and quota-free trade in goods between the E.U and the U.K., but also introduces certain non-tariff barriers to trade. To date, we have experienced some delays in the movement of goods between the U.K. and the E.U. and loss of access to the E.U. labor pool, none of which has been material. Over time, the withdrawal of the U.K. from the E.U. may create further global economic uncertainty, which may adversely impact the economies of the U.K., the E.U. countries and other nations, may cause our current and future customers to reduce their spending on our products and services, and may cause certain E.U.-based customers to source products from businesses based outside of the U.K. Given our several U.K.-based businesses, volatility in the value of the British pound relative to the U.S. dollar, or other foreign currencies, could increase the cost of raw materials and components for our U.K.-based businesses and could otherwise adversely affect the business, operations and the financial condition of our U.K.-based businesses.
 We have experienced component and raw material shortages in the past that impacted our ability to manufacture and ship all the product for which we have demand, and these constraints may continue in the future.
 Our business in the recent past was impacted by interruptions in the supply chain, due in part to the COVID pandemic, a resumption of strong worldwide demand for electronic products and components across a number of end markets, and interruption in supplier operations. As a result, we experienced delays in delivery and shortages of certain components and raw materials needed for many of the products we manufacture. In some cases, we have had to commit to additional orders or longer-term contracts from suppliers to secure needed components and materials. These supply chain constraints improved in 2023; however, some supply chain constraints remain, particularly with respect to certain types of semiconductors, integrated circuits, silicon wafers, specialized raw materials and chemicals, adhesives, engineered plastics and electronic components. Migration of sources of supply of some of these materials and components from China and other countries with high geopolitical risk to the U.S. and other countries deemed to have lower geopolitical risk create additional risk and uncertainty with respect to lead times and the cost of materials and components. Continuing or new supply shortages could result in delays in shipments to our customers during the period of such shortages. Any such delays would reduce our revenue and margins for the periods affected and would also result in an increase in our inventory of other components, which would reduce our operating cash flow.
 Our business may suffer if we are unable to attract and retain key personnel.
 Our future success depends to a significant extent upon the continued service of our executive officers and other key management and technical personnel and on our ability to continue to attract, retain and motivate qualified personnel. The lack of human capital due to very competitive labor market conditions in certain regions could impact our ability to deliver products and services. The skilled manufacturing and specialized engineering labor market is currently very competitive. A significant portion of our revenue depends on the availability of a highly skilled technical workforce. It is critical that we retain, develop, and grow our workforce to protect future revenue and improve our competitive advantage. We are experiencing increased competition for our most talented employees which may erode our competitive advantage, impair our ability to meet certain customer requirements or increase labor costs.
 We also have a mature workforce. Some of our businesses, including our businesses in engineered systems as well as in traveling wave tube and integrated microwave module design and development, draw from a pool of specialized engineering talent that is small and, in some cases, currently shrinking. Some of our businesses have a need for employees with a certain level of security clearance, and competition for such employees has increased. While we have engaged in succession planning, the loss of the services of one or more of our key employees or our failure to attract, retain and motivate qualified personnel could have a material adverse effect on our business, financial condition and results of operations.
 Higher tax rates may harm our results of operations and cash flow.
 Increases in the United States on the taxation of foreign income and expense may harm our results of operations and cash flow. The relative amount of income we earn in jurisdictions outside the U.S. could reduce our net income and increase our cash payments. Additionally, beginning in 2023, the U.S. has adopted a 15% corporate alternative minimum tax for certain large corporations. Teledyne does not expect to be subject to this tax in 2023 or 2024; however, Teledyne is closely monitoring the potential impact of the U.S. corporate minimum tax. Many other jurisdictions have also enacted corporate global 15% minimum tax rules, which will apply to Teledyne beginning in 2024. Teledyne is monitoring the impact of these foreign minimum tax rules. Increased tax due to corporate minimum taxes in the U.S. or in other jurisdictions could reduce our net income and increase our cash payments.

 Changes in future business conditions could cause business investments, goodwill and other long-lived assets to become impaired, resulting in significant losses and write-downs that would reduce our operating income.
 On December 31, 2023, Teledyne's goodwill was $8,002.8 million and net acquired intangible assets were $2,278.1 million. We are required to test annually both acquired goodwill and other indefinite-lived intangible assets for impairment based upon a fair value approach, rather than amortizing the value over time. We have chosen to perform our annual impairment reviews of goodwill and other indefinite-lived intangible assets during the fourth quarter of each fiscal year. We are also required to test goodwill for impairment between annual tests if events occur or circumstances change that would more likely than not reduce our enterprise fair value below its book value. These events or circumstances could include a significant change in the business climate, including a significant sustained decline in an entity's market value, legal factors, operating performance indicators, competition, sale or disposition of a significant portion of the business, or other factors. If the fair market value is less than the carrying value, including goodwill, we could be required to record a non-cash impairment charge. The valuation of reporting units requires judgment in estimating future cash flows, discount rates and estimated product life cycles. In making these judgments, we evaluate the financial health of the business, including such factors as industry performance, changes in technology and operating cash flows. As we have grown through acquisitions, the amount of goodwill and net acquired intangible assets is a significant portion of our total assets. As a result, the amount of any annual or interim impairment could be significant and could have a material adverse effect on our reported financial results for the period in which the charge is taken. Goodwill and acquired intangibles assets of recently acquired reporting units generally represent a higher inherent risk of impairment, which typically decreases as the businesses are integrated into the Company. We also may be required to record an earnings charge or incur unanticipated expenses if, as a result of a change in strategy or other reason, we were to determine the value of other assets had been impaired.
 For additional discussion of business acquisitions, goodwill and other long-lived assets, see the discussion under "Item 7. Management's Discussion and Analysis of Operations and Financial Condition" and Note 3.
 Our revenue from U.S. Government contracts depends on the continued availability of funding from the U.S. Government, and, accordingly, we have the risk that funding for our existing contracts may be canceled or diverted to other uses or delayed or that funding for new programs will not be available. Similarly, sales to the European defense market depends on continued funding from European governments.
 We perform work on a number of contracts with the U.S. Department of Defense and other agencies and departments of the U.S. Government including subcontracts with government prime contractors. Sales under contracts with the U.S. Government, including sales under contracts with the U.S. Department of Defense, as prime contractor or subcontractor, represented 24.5% and 24.9% of our total net sales in 2023 and 2022, respectively. Performance under government contracts has inherent risks that could have a material effect on our business, results of operations, and financial condition.
 Government contracts are conditioned upon the continuing availability of Congressional appropriations and the failure of Congress to appropriate funds for programs in which we participate could negatively affect our results of operations. U.S. Government shutdowns have resulted in delays in anticipated contract awards and delayed payments of invoices for several of our businesses and any new shutdown could have similar or worse effects. The failure by Congress to approve future budgets on a timely basis, and the increased frequency of Government "shutdowns" due to Congress failing to pass continuing resolutions in the absence of an approved budget, could delay procurement of our products and services and cause us to lose future revenues. Any renewed emphasis on Federal deficit and debt reduction could lead to a further decrease in overall defense spending. Budgetary concerns could result in future contracts being awarded more on price than on other competitive factors, and smaller defense budgets could result in government in-sourcing of programs and more intense competition on programs that are not in-sourced, which could result in lower revenues and profits. Rising inflation may result in a shift in U.S. defense spending between various programs based on priorities, which may result in a reduction or loss of expected revenues on programs in which we participate.
 Also, defense spending does not necessarily correlate to continued business for us, because not all of the programs in which we participate or have current capabilities may be provided with continued funding. Changes in policy and budget priorities by the U.S. Presidential Administration for various defense and NASA programs could impact our Engineered Systems, Aerospace and Defense Electronics and Digital Imaging segments. Our Aerospace and Defense Electronics segment may be impacted by volume or price reductions in connection with the F-35 Joint Strike Fighter program, to the extent they are imposed. The timing of program cycles can affect our results of operations for a quarter or year, and cancellations of significant programs such as the International Space Station ("ISS"), MOSSI II and the Shallow Water Combat Submersible ("SWCS"). In 2023, MOSSI II contract represented approximately 17% of net sales in the Engineered Systems segment. The MOSSI II contract was awarded to Teledyne Brown Engineering in September 2022 with an effective start date in January 2023 for the base two-year period. The remaining option years are proposed through 2030, but there is no guarantee the options will be awarded if the ISS support is cancelled. Of the total expected contract value, approximately 10% is dedicated to the Indefinite Delivery / Indefinite Quantity ("IDIQ") contract type. There is no guarantee this IDIQ portion will be fully funded.
 It is also not uncommon for the U.S. Department of Defense to delay the timing of awards or change orders for major programs for six to twelve months. These delays by the U.S. Government could impact our revenues. Delays in procurements,

 awards and modifications to contracts have negatively impacted revenue in 2023, primarily within our Engineered Systems segment. These delays are continuing in 2024 and may also impact future revenue. Uncertainty over budgets or priorities with the U.S. Presidential Administration could result in further delays in funding and the timing of awards, and changes in funded programs that could have a material impact on our revenues. U.S. Government operation under a continuing resolution could impact the business by preventing new programs from starting as planned and by limiting funding on existing programs. A significant shift in U.S. Government priorities related to programs and acquisition strategies could have a material impact to our financial results.
 Further, most of our U.S. Government contracts are subject to termination by the U.S. Government either at its convenience or upon the default of the contractor. Termination for convenience provisions provides only for the recovery of costs incurred or committed, settlement expenses, and profit on work completed prior to termination. Termination for default clauses imposes liability on the contractor for excess costs incurred by the U.S. Government in re-procuring undelivered items from another source. During 2023 and 2022, contracts terminated by the U.S. Government have not materially impacted our results of operations.
 We have begun to see increased sales into the European defense market as European defense budgets increase as a result of the conflict in Ukraine, threats from Russia and other geopolitical instability. If European government funding on defense programs declines, existing and potential future sales would be negatively impacted.
 Our U.S. Government contracting business is subject to government contracting regulations, including increasingly complex regulations on cybersecurity, and our failure to comply with such laws and regulations could harm our operating results and prospects.
 Our U.S. Government contracting businesses, like other government contractors, are subject to various audits, reviews and investigations (including private party "whistleblower" lawsuits) relating to our compliance with applicable federal and state laws and regulations. More routinely, the U.S. Government may audit the costs we incur on our U.S. Government contracts, including allocated indirect costs. Such audits could result in adjustments to our contract costs. Any costs found to be improperly allocated to a specific contract will not be reimbursed, and such costs already reimbursed would need to be refunded. We have recorded contract revenues based upon costs we expect to realize after final audit. In a worst case scenario, should a business or division be charged with wrongdoing, or should the U.S. Government determine that the business or division is not a "presently responsible contractor," that business or division, and conceivably our Company as a whole, could be temporarily suspended or, in the event of a conviction, could be debarred for up to three years from receiving new government contracts or government-approved subcontracts. In addition, we could expend substantial amounts defending against such charges and in damages, fines and penalties if such charges were proven or were to result in negotiated settlements. Routine audits by U.S. Government agencies of Teledyne's various procurement and accounting systems have the potential to result in disapproval of the audited systems by the administrative contracting officer. Disapproval could significantly impact cash flow, as up to 10% may be withheld from payments, as well as significantly impact potential contract awards and increase audit oversight of individual contract proposals.
 The Department of Defense as well as other U.S. Government contracting agencies have adopted rules and regulations requiring contractors to implement a set of cybersecurity measures to attain the safeguarding of contractor systems that process, store, or transmit certain information. Implementation and compliance with these cybersecurity requirements is complex and costly, and could result in unforeseen expenses, lower profitability and, in the case of non-compliance, penalties and damages, all of which could have an adverse effect on our business. The cybersecurity requirements also impact our supply base which could impact cost, schedule and performance on programs if suppliers do not meet the requirements and therefore, do not qualify to support the programs.
 We also are required to procure certain materials and parts from supply sources approved by the U.S. Government. The inability of a supplier to meet our needs, the failure to obtain such approvals or the appearance of counterfeit parts in our products could have a material adverse effect on our financial position, results of operations or cash flows. Such failure or inclusion could result in claims under the False Claims Act, which could lead to civil and criminal penalties and disbarment of the applicable business unit from doing business with the U.S. Government, among other things. Risks associated with counterfeit parts could be exacerbated as a result of supply chain shortages or due to parts becoming obsolete.
 We generate revenue from companies in the oil and gas industry, especially the offshore oil and gas industry, a historically cyclical industry with levels of activity that are significantly affected by the levels and volatility of oil and gas prices, which has in the past impacted and can impact in the future our financial results.
 The oil and gas industry has historically been cyclical and characterized by significant changes in the levels of exploration and development activities. Oil and gas prices, and market expectations of potential changes in those prices, significantly affect the levels of those activities. Any prolonged reduction in the overall level of offshore oil and gas exploration and development activities, whether resulting from changes in oil and gas prices or otherwise, could materially and adversely affect our financial condition and the results of our businesses within our Instrumentation segment.

 Some factors that have affected and are likely to continue affecting oil and gas prices and the level of demand for our products and services include the following:
 • worldwide demand for oil and gas;
 • the ability of the Organization of Petroleum Exporting Countries ("OPEC"), to set and maintain production levels;
 • the level of production by non-OPEC countries;
 • the war between Russia and Ukraine, including the implementation of price controls on Russian oil exports and restrictions on oil and gas exports imposed by Russia;
 • conflict in the Middle East, including disruption of shipping lanes in the Red Sea;
 • the ability of oil and gas companies to generate or raise funds for capital expenditures;
 • domestic and foreign tax policy;
 • laws and governmental regulations that restrict exploration and development of oil and gas in various offshore jurisdictions or the use of hydraulic fracturing;
 • laws and governmental regulation that restrict the use of hydraulic fracturing;
 • technological changes;
 • the political environment of oil-producing regions;
 • the price and availability of alternative fuels; and
 • climate change regulations that provide incentives to conserve energy, use electric vehicles or use alternative energy sources, or that impose restrictions on the development and extraction of oil and gas.
 Teledyne manufactures seismic energy sources, interconnects and data acquisition products that are used in offshore energy exploration. When crude oil and natural gas prices are low, the level of marine seismic exploration activity typically decreases, potentially resulting in reduced demand for our products used in offshore energy exploration. In addition, a decline in the level of capital spending by oil and natural gas companies may result in a reduced rate of development of new energy reserves, which could adversely affect demand for our products related to energy production, and, in certain instances, result in the cancellation, modification or rescheduling of existing orders and a reduction in customer-funded research and development related to next generation products.
 We may not have sufficient resources to fund all future research and development and capital expenditures or possible acquisitions.
 In order to remain competitive, we must make substantial investments in research and development of new or enhanced products and continuously upgrade our process technology and manufacturing capabilities. Our research and development efforts primarily involve engineering and design related to improving existing products and developing new products and technologies in the same or similar fields. Our Teledyne Scientific Company subsidiary, which serves as our primary research center, has been actively promoting and funding joint research and development projects with other Teledyne businesses, including Teledyne Marine, Teledyne Defense Electronics, Teledyne Digital Imaging and our Test and Measurement businesses. The business of Teledyne e2v, for which the design and development of specialized technology for high performance systems and equipment is integral, also requires substantial investments in research and development. Additionally, some of our businesses have sought or are actively pursuing governmental support and funding for some of their research and development initiatives. Nonetheless, we may be unable to fund all of our research and development and capital investment needs or possible strategic acquisitions of businesses or product lines. Our ability to raise additional capital will depend on a variety of factors, some of which will not be within our control, including the existence of bank and capital markets, investor perceptions of us, our businesses and the industries in which we operate, and general economic conditions. Failure to successfully raise needed capital or generate cash flow on a timely or cost-effective basis could have a material adverse effect on our business, results of operations and financial condition. In addition, if we fail to accurately predict future customer needs and preferences or fail to produce viable technologies, we may invest heavily in research and development of products that do not lead to significant revenue, which would adversely affect our profitability.
 Limitations in customer funding for applied research and development and limitations in government support for research and development expenditures may reduce our ability to apply our ongoing investments in some market areas.
 We may be unable to successfully introduce new and enhanced products in a timely and cost-effective manner or increase our participation in new markets, which could harm our profitability and prospects.
 Our operating results depend in part on our ability to introduce new and enhanced products on a timely basis. We have major development activities at some of our businesses, for which a failure to execute in a timely manner could negatively impact those businesses. Some products, especially those sold by our Test and Measurement group, have short lifecycles that require frequent updating and new product innovation. In order to improve our product development capabilities, we purchased the research center that is now Teledyne Scientific Company in 2006 and in 2011 we purchased DALSA to gain access to a well-equipped MEMS research and development center. In 2013, we opened a 52,000-square-foot technology development center in Daytona Beach, Florida primarily to serve the offshore oil and gas production and exploration industries. Successful

 product development and introduction depend on numerous factors, including our ability to anticipate customer and market requirements, changes in technology and industry standards, our ability to differentiate our product offerings from the product offerings of our competitors, and market acceptance. We may not be able to develop and introduce new or enhanced products in a timely and cost-effective manner or to develop and introduce products that satisfy customer requirements.
 We also have the risk that our defense businesses may not be able to replace revenue related to legacy platforms with products for new platform applications. We face the risk that changes in systems architectures will obviate the need for our products. For example, electronically steered radar arrays do not need certain high voltage interconnects like mechanically steered radar arrays do and unmanned aircraft will not need ejection seat sequencers.
 Our new products also may not achieve market acceptance or correctly address new industry standards and technological changes. We may also lose any technological advantage to competitors if we fail to develop new products in a timely manner.
 Additionally, new products may trigger increased warranty costs as information on such products is augmented by actual usage. Accelerated entry of new products to meet heightened market demand and competitive pressures may cause additional warranty costs as development and testing time periods might be accelerated or condensed.
 We intend to both adapt our existing technologies and develop new products to expand into new market segments. We may be unsuccessful in accessing these and other new markets if our products do not meet our customers' requirements, as a result of changes in either technology and industry standards or because of actions taken by our competitors.
 The airline industry is heavily regulated, and if we fail to comply with applicable requirements, our results of operations could suffer.
 Governmental agencies throughout the world, including the FAA, prescribe standards and qualification requirements for aircraft components, including virtually all commercial airline and general aviation products. Specific regulations vary from country to country, although compliance with FAA requirements generally satisfies regulatory requirements in other countries. If any material authorization or approval qualifying us to supply our products is revoked or suspended, then sale of the product would be prohibited by law, which would have an adverse effect on our business, financial condition and results of operations.
 From time to time, the FAA or equivalent regulatory agencies in other countries propose new regulations or changes to existing regulations, which often are more stringent than existing regulations. If such proposals are adopted and enacted, we may incur significant additional costs to achieve compliance, which could have a material adverse effect on our business, financial condition and results of operations.
 The Federal Aviation Administration ("FAA") and equivalent regulatory agencies have increasingly focused on the need to assure that airline industry products are designed with sufficient cybersecurity controls to protect against unauthorized access or other unwanted compromise. A failure to meet these evolving expectations could negatively impact sales into the industry and expose us to legal or contractual liability.
 In January 2024, the FAA ordered the temporary grounding of Boeing 737-9 MAX aircraft as a result of an incident on a Boeing 737-9 MAX where it lost a "door plug." There is a risk that this incident, or other issues identified during the subsequent investigations, could result in a suspension or reduction of manufacturing of 737 MAX family of aircraft by Boeing. There is also a risk that airlines and air travelers may respond negatively to the 737 MAX aircraft due to historic and continuing perceived safety concerns. This could negatively impact the demand for this aircraft in the future. These factors may further negatively impact our Commercial Aerospace business.
 Increasing competition could reduce the demand for our products and services.
 Each of our markets is highly competitive. Many of our competitors have, and potential competitors could have, greater name recognition, a larger installed base of products, more extensive engineering, manufacturing, marketing and distribution capabilities and greater financial, technological and personnel resources. New or existing competitors may also develop new technologies that could adversely affect the demand for our products and services. We have been experiencing increased competition for some of our key products. Furthermore, some of our patents have or are expiring, which could open up further competition. Additionally, some of our customers have been developing competing products or electing to vertically integrate and replace our products with their own. For example, the aircraft connectivity solutions provided by our Teledyne Controls business is seeing increased competition from new entrants and original equipment manufacturers. Furthermore, Boeing has announced a vertical integration program, which includes avionics. Lastly, some of our products face increasing competition from alternative technologies.
 Industry acquisition and consolidation trends, particularly among aerospace and defense contractors, have adversely impacted demand for our aerospace and defense related engineering services as large prime contractors elect to in-source major acquisition programs and expand small business participation to meet U.S. Government contracting goals. Such consolidations can also cause delays in business as the newly consolidated organization undergoes integration.
 Low-cost competition from China and other developing countries could also result in decreased demand for our products. Increasing competition could reduce the volume of our sales or the prices we may charge, which would negatively impact our

 revenues. We are experiencing increasing competition in our digital imaging businesses from Chinese manufacturers that offer lower cost products with increasingly advanced technical capabilities.
 Product liability claims, product recalls and field service actions could have a material adverse effect on our reputation, business, results of operations and financial condition and we may have difficulty obtaining product liability and other insurance coverage.
 As a manufacturer and distributor of a wide variety of products, including monitoring instruments, gas and flame detection instruments, products used in offshore oil and gas production, products used in transportation and commercial aviation, products used in maritime navigation and products used in medical devices (including X-ray detectors), our results of operations are susceptible to adverse publicity regarding the quality or safety of our products. Product liability claims challenging the safety of our products may result in a decline in sales for a product, which could adversely affect our results of operations. This could be the case even if the claims themselves are proven to be untrue or settled for immaterial amounts.
 While we have general liability and other insurance policies concerning product liabilities and errors and omissions, we have self-insured retentions or deductibles under such policies with respect to a portion of these liabilities. Awarded damages could be more than our accruals. We could incur losses above the aggregate annual policy limit as well. We cannot ensure that, for 2024 and in future years, insurance carriers will be willing to renew coverage or provide new coverage for product liability.
 Product recalls can be expensive and tarnish our reputation and have a material adverse effect on the sales of our products. We cannot assure that we will not have additional product liability claims or that we will not recall any products.
 We have been joined, among a number of defendants (often over 100), in lawsuits alleging injury or death as a result of exposure to asbestos. In addition, because of the prominent "Teledyne" name, we may continue to be mistakenly joined in lawsuits involving a company or business that was not assumed by us as part of our 1999 spin-off. To date, we have not incurred material liabilities in connection with these lawsuits. However, our historical insurance coverage, including that of our predecessors, may not fully cover such claims and the defense of such matters. Coverage typically depends on the year of purported exposure and other factors. Nonetheless, we intend to vigorously defend our position against these claims.
 Teledyne Brown Engineering, Inc. and other Teledyne companies manufacture components for customers in the nuclear power market, including utilities and certain governmental entities. Certain liabilities associated with such products are covered by the Price-Anderson Nuclear Industries Indemnity Act and other statutory and common law defenses, and we have received indemnities from some of our customers. However, there is no assurance we will not face product liability claims related to such products or that our exposure will not exceed the amounts for which we have liability coverage or protection.
 Our business and financial results could be adversely affected by conditions and other factors associated with our suppliers and subcontractors.
 Some items we purchase for the manufacture of our products are purchased from limited or single sources of supply due to technical capability, price and other factors. For example, Teledyne Digital Imaging has an internal single source of supply for CCD semiconductor wafers used to assemble image sensors and an external single source of supply for CMOS semiconductor wafers used to assemble X-ray panel products. Furthermore, sole source supply is more common among our businesses that are heavily involved in research and development because there can be few suppliers in the world capable of producing the products or providing the services with the right highly specialized technology. Teledyne LeCroy continues to outsource a portion of its research and development activities to third-party engineering firms in Malaysia and India where it may be more difficult for us to enforce our intellectual property rights. We have also outsourced from time to time the manufacturing of certain parts, components, subsystems and even finished products to single or limited sources, including international sources. Disruption of these sources or supplier-imposed rationing of scarce components could cause delays or reductions in shipments of our products or increases in our costs, which could have an adverse effect on our financial condition or operations. International sources pose additional risks, some of which are similar to those described above regarding international sales. With any continuing disruption in the global economy and financial markets, some of our suppliers may also continue to face issues gaining access to sufficient credit and materials to maintain their businesses, which could reduce the availability of some components and, to the extent such suppliers are single source suppliers, could adversely affect our ability to continue to manufacture and sell our products. Some companies engage subcontractors to perform a portion of the services we provide to our customers. To provide these services, the subcontractor must be financially viable and compliant with applicable laws, regulations and contract terms. Non-performance by a subcontractor could result in misalignment between subcontractor performance and our contractual obligations to our customers.
 We face risks related to sales through distributors and other third parties which could harm our business.
 We sell a portion of our products through third parties such as distributors, sales representatives, value-added resellers and OEMs (collectively, "distributors"). Using third parties for distribution exposes Teledyne to many risks, including concentration, credit risk and legal risk because under certain circumstances we may be held responsible for the actions of those third-party sales channels. We may rely on one or more key distributors for selling a product, and the loss of these distributors could reduce our revenue. Distributors may face financial difficulties, including bankruptcy, which could harm our collection of

 accounts receivables and financial results. Violations of the Foreign Corrupt Practices Act or similar anti-bribery laws by distributors or other third-party intermediaries could have a material impact on our business. Competitors could also block our access to such parties. Failing to manage risks related to our use of third-party sales channels may reduce sales, increase expenses, and weaken our competitive position, and could result in sanctions against us.
 Failing to comply with increasing environmental regulations, as well as the effects of potential environmental liabilities, could have a material adverse financial effect on us.
 We, like other industry participants, are subject to various federal, state, local and international environmental laws and regulations. We may be subject to increasingly stringent environmental standards in the future, particularly as greenhouse gas ("GHG") emissions and climate change regulations and initiatives proliferate. Future developments, administrative actions or liabilities relating to environmental and climate change matters could have a material adverse effect on our business, results of operations or financial condition. Environmental regulations on hydraulic fracturing and the use of seismic energy sources for offshore energy exploration could adversely affect some product lines of our Instrumentation segment.
 Our manufacturing operations, including former operations, could expose us to material environmental liabilities. Additionally, companies that we acquire may have environmental liabilities that might not be accurately assessed or brought to our attention at the time of the acquisition.
 The U.S. Environmental Protection Agency ("EPA") has focused on GHGs, maintaining GHGs threaten the public health and welfare of the American people. The EPA's continuing efforts to limit GHG emissions could adversely affect our U.S. manufacturing operations, increase prices for energy, fuel and transportation, require us to accommodate changes in parameters, such as the way parts are manufactured, and may, in some cases, require us to redesign certain of our products. This, or other federal or state regulations, could lead to increased costs, which we may not be able to recover from customers, delays in product shipments and loss of market share to competitors. For example, Teledyne Battery Products unit makes lead acid batteries in California and is subject to a variety of environmental regulations and inspections, which have increased over time. Also, some of our sites conduct electroplating, metal finishing and other operations that utilize hazardous materials that are subject to similar regulations. Regulatory changes or failure by a business to meet applicable requirements could disrupt that business or force a closure or relocation of the business.
 Our products are subject to various regulations that prohibit or restrict the use of certain hazardous substances. For example, our products placed on the European market are subject to the Registration, Evaluation, Authorization and Restriction of Chemicals and the restriction of the use of certain hazardous substances in electrical and electronic equipment Directives. Future hazardous substance restrictions or prohibitions may limit our ability to market some products in certain countries.
 For additional discussion of environmental matters, see the discussion under the caption "Other Matters – Environmental" of "Item 7. Management's Discussion and Analysis of Results of Operation and Financial Condition" and Note 17.
 We may not be able to sell or reconfigure businesses, facilities or product lines that we determine no longer meet with our growth strategy or that should be consolidated.
 Consistent with our strategy to emphasize growth in our core markets, we continually evaluate our businesses to ensure that they are aligned with our strategy and objectives. Over the years we have also consolidated some of our business units and facilities, in some cases to respond to downturns in the defense or oil and gas industries, among other reasons. We may not be able to realize efficiencies and cost savings from our consolidation activities. There is no assurance that our efforts will be successful. If we do not successfully manage our current consolidation activities, or any other similar activities that we may undertake in the future, expected efficiencies and benefits might be delayed or not realized, and our operations and business could be disrupted. Our ability to dispose of, exit or reconfigure businesses that may no longer be aligned with our growth strategy will depend on many factors, including the terms and conditions of any asset purchase and sale agreement or lease agreement, as well as industry, business and economic conditions. We cannot provide any assurance that we will be able to sell non-strategic businesses on terms that are acceptable to us, or at all. In addition, if the sale of any non-strategic business cannot be consummated or is not practical, alternative courses of action, including relocation of product lines or closure, may not be available to us or may be more costly than anticipated.
 Risks related to our indebtedness
 Our indebtedness, and any failure to comply with our covenants that apply to our indebtedness, could materially and
 adversely affect our business.
 As of December 31, 2023, we had $3,115.0 million total outstanding indebtedness in senior notes and $150.0 million outstanding in term loans. As of December 31, 2023, no borrowings were outstanding under our $1.15 billion credit facility. Teledyne incurred a significant amount of indebtedness in connection with the financing of the acquisition of FLIR. We also incurred additional indebtedness through the assumption of FLIR's existing senior notes. The use of indebtedness to finance the acquisition reduced our liquidity and caused us to place more reliance on cash generated from operations to pay principal and interest on our debt, thereby reducing the availability of our cash flow for operating activities and capital expenditure needs or to pursue other potential strategic plans. The agreements we entered into with respect to our indebtedness, including the agreements we entered into to finance the FLIR acquisition and in connection with the assumption of FLIR's existing senior

 notes, contain negative covenants, that, subject to certain exceptions, include limitations on indebtedness related to our bank term loans and credit facility, liens, dispositions, investments and mergers and other fundamental changes. Our ability to comply with these negative covenants can be affected by events beyond our control. The indebtedness and these negative covenants may also have the effect, among other things, of limiting our ability to obtain additional financing, if needed, reducing the funds available to make acquisitions or capital expenditures, reducing our flexibility in planning for or reacting to changes in our business or market conditions, and making us more vulnerable to economic downturns and adverse competitive and industry conditions. In addition, a breach of the negative covenants could result in an event of default with respect to the indebtedness, which, if not cured or waived, could result in the indebtedness becoming immediately due and payable and could have a material adverse effect on our business, financial condition or operating results. Any future indebtedness incurred under our credit facility will expose us to interest rate risk.
 We may not be able to service our debt obligations.
 Our ability to meet our interest expense and debt service obligations will depend on our future performance, including the cash we generate from operating activities, which will be affected by financial, business, economic and other factors, including potential changes in laws or regulations, industry conditions, industry supply and demand, customer preferences, the success of our products and pressure from competitors. If we are unable to meet our debt service obligations or should we fail to comply with our financial and other negative covenants contained in the agreements governing our indebtedness, we may be required to refinance all or part of our debt, sell strategic assets at unfavorable prices, incur additional indebtedness or issue common stock or other equity securities. We may not be able to, at any given time, refinance our debt, sell assets, incur additional indebtedness or issue equity securities on terms acceptable to us, in amounts sufficient to meet our needs. If we are able to raise additional funds through the issuance of equity securities, such issuance would also result in dilution to our stockholders. Our inability to service our obligations or refinance our debt could have a material and adverse effect on our business, financial condition or operating results.
 The credit rating of Teledyne could be downgraded, which may increase borrowing costs.
 The credit ratings of Teledyne's debt could be subject to a downgrade below investment grade. If a ratings downgrade were to occur, we could experience higher borrowing costs in the future and more restrictive debt covenants, which would reduce profitability and diminish operational flexibility. A ratings downgrade could also limit our access to certain sources of debt financing.
 Risks related to climate change
 Climate change may disrupt or adversely impact our business.
 Climate change may have an increasingly adverse impact on our business and those of our customers, partners and suppliers. While we seek to mitigate the risks associated with climate change on our operations, there are inherent climate-related risks globally. As discussed under the risk factor below headed "Natural and man-made disasters could adversely affect our business, results of operations and financial condition," some of our manufacturing facilities are located in regions that may be impacted by severe weather events, like hurricanes or ice storms, or in areas prone to wildfires, droughts and rising sea levels, the frequency and severity of which may increase as a result of climate change. These events could result in potential damage to our physical assets as well as disruptions in manufacturing activities. Severe weather and wildfire events may impair the ability of our employees to work effectively. Climate change, including the increasing frequency and intensity of extreme weather events, its impact on our supply chain and critical infrastructure worldwide and its potential to increase political instability in regions where we, our customers, partners and our suppliers do business, may disrupt our business and may cause us to experience higher employee attrition and higher costs to maintain or resume operations. The effects of climate change also may impact our decisions to construct new facilities or maintain existing facilities in the areas most prone to physical risks, which could similarly increase our operating and material costs. We could also face indirect financial risks passed through the supply chain that could result in higher prices for our products and the resources needed to produce them.
 We sell products to customers directly engaged in oil and gas exploration and production. Changes to regulations, social practices and preferences, energy generation and transportation technologies that may occur or be implemented to mitigate climate change could result in reduced demand for hydrocarbon products, which could result in a reduction in sales to these customers.
 Regulations associated with climate change could adversely affect our business.
 Legislative and regulatory measures currently under consideration or being implemented by government authorities to address climate change could require reductions in our GHG or other emissions, establish a carbon tax or increase fuel or energy taxes. We have also voluntarily announced goals to reduce our GHG emissions by a target date. These legal requirements, in addition to emission reduction efforts that we voluntarily undertake, are expected to result in increased capital expenditures and compliance costs and could result in higher costs required to operate and maintain our facilities, procure raw materials and energy, and may require us to acquire emission credits or carbon offsets. These costs and restrictions could harm our business and results of operations by increasing our expenses or requiring us to alter our operations and product design activities. Proposed rules under the Federal Acquisition Regulation and similar rules in other jurisdictions such as the United

 Kingdom require or will require major contractors to disclose enhanced information on GHG emissions and commit to GHG emission reduction targets. If we are unable to comply with these rules, we may be ineligible to receive future contract awards from the U.S. and other governments. The inconsistent international, regional and/or national requirements associated with climate change regulations also create economic and regulatory uncertainty.
 Investor sentiment towards climate change and sustainability could adversely affect our business and the market price for our common stock.
 Increased investor focus and activism related to climate change and sustainability may hinder our access to capital, as investors may reconsider their capital investment as a result of their assessment of our sustainability practices. We may face increasing pressure regarding our sustainability disclosures and practices. Additionally, members of the investment community may screen companies such as ours for sustainability performance before investing in our stock. If we are unable to meet the sustainability standards set by these investors, or if we are unable meet GHG reduction targets we communicate to the public, we may lose investors, our stock price may be negatively impacted, and our reputation may be negatively affected.
 Other risks we face
 Natural and man-made disasters could adversely affect our business, results of operations and financial condition.
 Several of our facilities, as a result of their locations, could be subject to a catastrophic loss caused by earthquakes, hurricanes, tornados, floods, ice storms, rising sea levels, droughts or other natural disasters. Many of our production facilities and our headquarters are located in California and thus are in areas with above average seismic activity and may also be at risk of damage due to wildfire or mudslides. In November 2018, wildfires impacted areas near our headquarters and principal research and development center in Thousand Oaks, California, resulting in temporary disruptions and evacuations of employees who lived nearby. Local utilities may impose blackouts during high fire risk weather conditions, which could result in disruptions to our businesses located in California, including our headquarters. In January 2023, heavy rains in California resulted in a mudslide that blocked road access to our facility in Tracy, California that makes energetic devices, resulting in several days of plant closure.
 In the event of a major earthquake, tornado, hurricane or catastrophic event such as fire, power loss, telecommunications failure, vandalism, cyber-attack, war, terrorist attack or health epidemic (including COVID), we may be unable to continue our operations and may endure system interruptions, reputational harm, delays in our application development, lengthy interruptions in our production, breaches of data security and loss of critical data, all of which could harm our business, results of operations and financial condition and have a material adverse impact on us. In December 2022, an attack by political extremists on our facility in Presteigne, Wales that makes printed circuit boards resulted in damage to the facility and interrupted some productions lines for a period of time. Teledyne FLIR's components operation is a single source supplier of certain sensors used throughout the FLIR business, and a disruption in business due to a disaster could have a material adverse impact on the businesses of Teledyne FLIR. Teledyne's facilities in Quebec, Canada have been impacted by loss of electrical power caused by severe ice storms. In addition, we have manufacturing facilities in the southeastern United States and Texas that have been threatened or struck by major hurricanes. In 2017, our businesses located in Houston, Texas were impacted by Hurricane Harvey and our business in Florida was threatened by Hurricanes Irma and Matthew. Our facilities in Alabama, Florida, Nebraska, Tennessee and Virginia have also been threatened by tornados. If any of our California facilities were to experience a catastrophic earthquake or wildfire loss, or if any of our Alabama, Florida, Nebraska, Tennessee or Texas facilities were to experience a catastrophic hurricane, storm, tornado or other natural disaster, or if Teledyne's facilities in Quebec experience long-term loss of electrical power, such event could disrupt our operations, delay production, shipments and revenue, result in large expenses to repair or replace the facility or facilities and could have a material adverse effect on our business. In addition, the insurance we maintain may be insufficient to cover our losses resulting from disasters, cyber-attacks or other business interruptions, and any incidents may result in loss of, or increased costs of, such insurance. Our existing disaster recovery and business continuity plans (including those relating to our information technology systems) may not be fully responsive to, or minimize losses associated with, catastrophic events.
 Disasters also have an indirect adverse impact on our business. For example, in 2018, a fire at a Netherlands-based facility of a key supplier of printed circuit boards resulted in delivery disruptions to the electronics industry, including to businesses in our Digital Imaging segment.
 Adverse findings in matters related to export control practices, including FLIR's historical practices, could materially impact us.
 Effective April 24, 2022, the United States Department of State's Office of Defense Trade Controls Compliance ("DDTC") closed the four-year Consent Agreement that had been entered into by FLIR Systems, Inc., to resolve various export allegations under the International Traffic in Arms Regulations ("ITAR"). In connection with this Consent Agreement and other export matters, FLIR and its successor by mergers, Teledyne FLIR, has enhanced the trade compliance program more broadly, implemented remedial measures and have undergone external and internal audits of the trade compliance program. Nonetheless, adverse disclosures and findings could cause additional expenses in connection with further remedial measures or potential penalties.

 We have made other voluntary disclosures to the U.S. Department of State and the U.S. Department of Commerce, including to the Bureau of Industry and Security ("BIS") with respect to Teledyne FLIR shipments of products from non-U.S. jurisdictions which were not licensed due to incorrect de minimis calculation methodology under the Export Administration Regulations. We have made voluntary disclosures to export authorities in jurisdictions outside the U.S. for certain potential violations of local export laws.
 At this time, based on available information, we are unable to reasonably estimate the time it may take to resolve these matters or the amount or range of potential loss, penalty or other government action, if any, that may be incurred in connection with these matters. However, an unfavorable outcome could result in substantial fines and penalties or loss or suspension of export privileges or of particular authorizations that could be material to our financial position, results of operations or cash flows in and following the period in which such outcome becomes estimable or known.
 We may not be able to enforce or protect our intellectual property rights, or third parties may claim we infringe their intellectual rights, each which may harm our ability to compete and thus harm our business.
 Our ability to enforce and protect our patents, copyrights, software licenses, trade secrets, know-how, and other intellectual property rights is subject to general litigation risks, as well as uncertainty as to the enforceability of our intellectual property rights in various countries. When we seek to enforce our rights, we have found that various claims may be asserted against us, including claims that our intellectual property right is invalid, is otherwise not enforceable or is licensed to the party against whom we are asserting a claim. In addition, we may be the target of aggressive and opportunistic enforcement of patents by third parties. If we are not ultimately successful in defending ourselves against these claims in litigation, we may not be able to sell a product or family of products due to an injunction, or we may have to pay damages that could, in turn, harm our results of operations. Our inability to enforce our intellectual property rights under these circumstances may harm our competitive position and our business.
 Our business and operations could suffer in the event of cybersecurity breaches.
 Attempts by malicious actors to gain unauthorized access to our information technology systems have become more sophisticated and are sometimes successful. These attempts, which might be related to industrial or foreign government espionage, crime, activism, or other motivations, include covertly introducing malware into our computers and computer networks, performing reconnaissance, impersonating authorized users, extortion, fraud, and stealing, corrupting or restricting our access to data, among other activities. We have in the past experienced cyber-attacks including some loss of confidentiality and some loss of availability, although these attacks have not had material impact on our business. Our customers and suppliers have also experienced successful cyber-attacks, which in some cases resulted in payments by or to us being unlawfully diverted. We continue to train our personnel and update our infrastructure, security tools and processes, including processes for integration of newly acquired businesses, to protect against security incidents, including both external and internal threats, and to reduce the likelihood of their occurrence. Company personnel and third parties have been tasked to prevent, deter, detect, respond to, and investigate such incidents; however, it is possible that we might not prevent or be aware of or be able to react to an incident or its magnitude and effects. The theft, corruption, unauthorized use or publication of our intellectual property or confidential business information due to a cyber-attack could harm our competitive position, reduce the value of our investment in research and development and other strategic initiatives or otherwise adversely affect our business. We are subject to U.S. Department of Defense, Department of Homeland Security, and Department of Energy regulations applicable to certain types of data residing on or transiting through our information systems, and these regulations have been and will continue to be incorporated into certain U.S. Government contracts that we hold. To the extent that any security breach results in inappropriate disclosure of confidential or controlled information of employees, third parties or the U.S. Government, or any of the deployed security controls are deemed insufficient, we may incur liability or the loss of contracts or security clearances. As a result, we expect to continue to devote resources to the security of our information technology systems, operating technology systems, products and services. More resources may be required in the defense arena to the extent the U.S. Government increases its cybersecurity mandates. Unauthorized access to or control of our products, data, devices or systems could impact the safety of our customers and other third parties which could result in legal claims against us. Security breaches also could result in a violation of applicable U.S. and international privacy and other laws, including GDPR, Health Insurance Portability and Accountability Act, Payment Card Industry Data Security Standard, and California Consumer Privacy Act, or SEC regulations, and subject us to private consumer or securities litigation and governmental investigations and proceedings, any of which could result in our exposure to material civil or criminal liability. The systemic cybersecurity risk environment is elevated, in part by geopolitical conflicts and tensions, including the war between Ukraine and Russia, the war in Israel and neighboring regions, and increased supply chain-related cyber-risks. New technologies, including generative AI, quantum computing, new uses of QR codes and other innovations in digital communications, introduce new attack vectors, and new potential compromise scenarios, which malicious adversaries can exploit.
 Issues in the development and use of artificial intelligence may result in reputational harm or liability, and failure to introduce new and innovative products that have artificial intelligence capabilities could put us at a competitive disadvantage.

 We currently incorporate machine learning and artificial intelligence capabilities ("AI") into certain of our products and solutions and may seek to expand the use of AI in our offerings in the future. As with many innovations, AI presents risks, challenges, and unintended consequences that could affect our business. AI algorithms and training methodologies may be flawed. These deficiencies and other failures of AI systems could subject us to competitive harm, regulatory action, legal liability, and brand or reputational harm. Further, incorporating AI could give rise to litigation risk and risk of non-compliance and unknown cost of compliance, as AI is an emerging technology for which the legal and regulatory landscape is not fully developed (including potential liability for breaching intellectual property or privacy rights or laws). While new AI initiatives, laws, and regulations are emerging and evolving, what they ultimately will look like remains uncertain, and our obligation to comply with them could entail significant costs, negatively affect our business, or entirely limit our ability to incorporate certain AI capabilities into our offerings.
 Additionally, leveraging AI capabilities to potentially improve internal functions and operations presents further risks and challenges. The use of artificial intelligence to support business operations carries inherent risks related to data privacy and security, such as intended, unintended, or inadvertent transmission of proprietary, sensitive or export-controlled information, as well as challenges related to implementing and maintaining AI tools. Additionally, our competitors might move faster than us to gain efficiencies by incorporating AI into their design and development processes, and our products and/or cost structure could become less competitive as a result.
 The rapid evolution of AI will require the application of resources by us to develop, test and maintain our products, services and operations to help ensure that AI is implemented ethically in order to minimize unintended, harmful impact.
 Our competitors may be faster or more successful than we are in incorporating AI and other disruptive technology into their offerings, which would impair our ability to compete successfully.
 Provisions of our governing documents, applicable law, and our Change in Control Severance Agreements could make an acquisition of Teledyne more difficult.
 Our Restated Certificate of Incorporation, our Fourth Amended and Restated Bylaws and the General Corporation Law of the State of Delaware contain several provisions, such as our classified Board, that could make the acquisition of control of Teledyne, in a transaction not approved by our Board, more difficult. We have also entered into Change in Control Severance Agreements with seven members of our current management, which could have an anti-takeover effect. These provisions may prevent or discourage attempts to acquire our Company.
 Our Fourth Amended and Restated Bylaws ("Bylaws") designate the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain lawsuits between us and our stockholders, which could limit our stockholders' ability to obtain a judicial forum that it finds favorable for such lawsuits and make it more costly for our stockholders to bring such lawsuits, which may have the effect of discouraging such lawsuits.
 Our Bylaws provide that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware will be, to the fullest extent permitted by law, the sole and exclusive forum for any (i) derivative action or proceeding brought on our behalf, (ii) action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, employees or agents to us or our stockholders, (iii) action asserting a claim arising pursuant to any provision of the General Corporation Law of the State of Delaware, Restated Certificate of Incorporation or Bylaws or (iv) any action asserting a claim governed by the internal affairs doctrine. Our Bylaws further provide that the federal district courts of the United States of America shall be the exclusive forum for the resolution of any complaint asserting a cause or causes of action arising under the Securities Act of 1933, as amended, including all causes of action asserted against any defendant to such complaint. Our Bylaws also provide that any person or entity purchasing or otherwise acquiring or holding any interest in shares of our capital stock will be deemed to have notice of and consented to this forum selection provision.
 However, this forum selection provision is not intended to apply to any actions brought under the Exchange Act. Section 27 of the Exchange Act creates exclusive federal jurisdiction over all suits brought to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder and accordingly, the forum selection provision in our Bylaws will not relieve us of our duties to comply with the Exchange Act and the rules and regulations thereunder, and our stockholders will not be deemed to have waived our compliance with these laws, rules and regulations.
 Nevertheless, this forum selection provision in our Bylaws may limit a stockholder's ability to bring a claim in a judicial forum that it finds favorable for disputes with us or any of our directors, officers and other employees, which may discourage lawsuits with respect to such claims, although our stockholders will not be deemed to have waived our compliance with federal securities laws and the rules and regulations thereunder. In addition, stockholders who do bring a claim in the Court of Chancery in the State of Delaware could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near Delaware. While we believe the risk of a court declining to enforce the forum selection provision contained in our Bylaws is low, if a court were to find the provision inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such action in other jurisdictions, which could harm our business, operating results and financial condition.

 Risks Related to Our Securities
 An investment in Teledyne's Common Stock and other securities involve risks, many of which are beyond our control.
 Stock markets in general, including the New York Stock Exchange on which our Common Stock is listed, have experienced a high degree of price and volume fluctuations that are not necessarily related to operating performance of the listed companies. In addition to general economic, political and market conditions, such volatility may be related to: (i) changes from analysts' expectations in revenues, earnings and other financial results; (ii) strategic actions by other competitors; (iii) changes to budgets or policies of the U.S. and other governments; and (iv) other risks described in this report. We cannot provide assurances as to our Common Stock price, which during fiscal 2023 ranged from a low of $364.98 to a high of $448.71.

 Item 1B. Unresolved Staff Comments

 None.

 Item 1C. Cybersecurity

 We face many cybersecurity threats including ransomware, denial-of-service attacks, and more advanced and persistent threats from state-affiliated groups. We have experienced cyber-attacks in the past and may experience cybersecurity incidents going forward. Our customers and suppliers face similar cybersecurity threats. While prior incidents have not materially affected our business, results of operations or financial condition, there is no guarantee that a future cyber incident would not affect our business strategy, results of operations or financial condition. See Item 1A. Risk Factors for more information on our cybersecurity risks.
 Risk Management and Strategy
 Our cybersecurity strategy prioritizes risk identification, quantification, communication, and mitigation, and this strategy is aligned with our overall Enterprise Risk Management strategy. Our strategy focuses on the deterrence, early detection, interception, and interruption of potential cyber-attacks. We strive to continuously monitor, evaluate, prioritize and mitigate vulnerabilities and attacks. Our policies and processes are compliant with applicable control frameworks provided by the U.S. National Institute of Standards and Technology ("NIST") and other applicable standards.
 Our employees are required to take cybersecurity-related training which promotes awareness of how to detect and respond to cybersecurity threats. We utilize benchmarking against peers in the industry to validate our defense posture, and we conduct internal and external assessments to evaluate our controls around information technology, operating technology, and product and service information security. We work with government, customer, industry and/or supplier partners, such as the National Defense Cyber Alliance to gather and develop best practices and share information to address cyber threats, and we contribute to overall cyber-safety of the defense industrial base through contributions of threat intelligence to law enforcement agencies.
 We deploy multiple defenses and connect them to allow automated responses to urgent threats, which aims to provide continued protection for mobile computing systems when they are outside the company perimeter. We conduct active threat hunting and vulnerability scanning to anticipate and pro-actively mitigate risks.
 We have incident response plans and procedures, the goal of which is to enable the company to respond effectively and compliantly should a cyber-incident arise. 'Tabletop' exercises are held at both the technical and executive level to maintain readiness to respond and to identify any areas where improvements or updates are required. We engage third-party expertise and utilize threat intelligence feeds to supplement and enhance our internal team of cybersecurity professionals.
 Governance
 Pursuant to its charter, the Audit Committee of the Board is responsible for reviewing, discussing and making recommendations to the Board on cybersecurity matters. Our Vice President of Information Technology and Chief Information Officer ("CIO") and our Chief Information Security Officer ("CISO") provide presentations to the Audit Committee on cybersecurity status, outcomes, and risks at each quarterly meeting. These briefings include assessments of cyber risks and threats landscape, updates on incidents, and our investments and plans in cybersecurity risk mitigation and governance.
 At the management level, our Enterprise Risk Management Committee identifies and drives mitigation of company-wide risks, including those related to cybersecurity. The committee consists of our Vice President, Chief Audit Executive ("Chair"), Senior Vice President and Chief Financial Officer, Executive Vice President, General Counsel, Chief Compliance Officer and Secretary, Associate General Counsel, Human Resources, Vice President and CIO, and individuals representing the business operations. The Chair of the Enterprise Risk Management Committee periodically reports to the Audit Committee and the Board of Directors on the progress and results of the actions taken by the committee.
 Our management team, including our Enterprise Risk Management Committee, CIO and CISO, is responsible for assessing and managing our cybersecurity risks and threats. Our CISO, who has approximately 30 years in various information technology and security roles and reports to our CIO, is primarily responsible for our overall cybersecurity risk management program and supervises both internal and external resources to prevent, detect, mitigate, and remediate cybersecurity risks, threats, and incidents. As such, our CISO has extensive experience and expertise in developing, implementing, and operating security policies and procedures covering our protective defenses of our network and critical data. We have established

 processes by which the CISO routinely informs the management team and the Board of cybersecurity risks, threats and incidents that have been identified or are reasonably likely of occurring and how such matters are managed.

 Item 2.
 Properties

 The Company has 76 principal operating facilities in 20 states and 10 foreign countries. The Company's executive offices are located in Thousand Oaks, California. We maintain our facilities in good operating condition, and we believe they are suitable and adequate for the purposes for which they are intended and overall have sufficient capacity to conduct business as currently conducted. At December 31, 2023, our principal operating facilities by segment were located as follows (countries and states listed alphabetically):
 • Digital Imaging - Belgium, Canada, Estonia, France, the Netherlands, Norway, Spain, Sweden, the United Kingdom and the United States
 The United States includes principal operating facilities in California, Florida, Indiana, Maryland, Massachusetts, Montana, New Jersey, Oklahoma, Oregon, and Pennsylvania
 • Instrumentation - Denmark, France, United Kingdom and the United States
 The United States includes principal operating facilities in California, Colorado, Florida, Massachusetts, Nebraska, New Hampshire, New York, Ohio, Pennsylvania, Texas and Virginia
 • Aerospace and Defense Electronics - the United Kingdom and the United States
 The United States includes principal operating facilities in California and Illinois
 • Engineered Systems - the United States, including principal operating facilities in Alabama, Maryland and Tennessee

 Item 3.
 Legal Proceedings

 Information pertaining to legal proceedings can be found in Note 17 and is incorporated by reference herein.

 Item 4.
 Mine Safety Disclosures

 No information is required in response to this item.

 Item 5.
 Market for Registrant's Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities

 Our Common Stock is listed on the New York Stock Exchange and traded under the symbol "TDY".
 As of February 16, 2024, there were 2,256 holders of record of the Common Stock. Because many of our shares of common stock are held by brokers and institutions on behalf of stockholders, we are unable to estimate the total number of beneficial owners of our stock represented by these stockholders of record.
 We intend to use future earnings to fund the development and growth of our businesses. Therefore, we do not anticipate paying any cash dividends in the foreseeable future.
 We have stock repurchase programs authorized by our Board of Directors to repurchase up to approximately three million shares. No repurchases were made since 2015. Although we have no current plans to repurchase stock, up to approximately three million shares may be repurchased under the stock repurchase program. See Note 2 for additional information about our stock repurchase program.
 Additional information required by this item is set forth in the 2024 Proxy Statement under the caption and "Securities Authorized for Issuance Under Equity Compensation Plans" and is incorporated herein by reference.

 Item 6.
 [Reserved]

 Item 7.
 Management's Discussion and Analysis of Financial Condition and Results of Operations

 Teledyne provides enabling technologies for industrial growth markets that require advanced technology and high reliability. These markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research. Our products include digital imaging sensors, cameras and systems within the visible, infrared and X-ray spectra, monitoring and control instrumentation for marine and environmental applications, harsh environment interconnects, electronic test and measurement equipment, aircraft information management systems, and defense electronics and satellite communication subsystems. We also supply engineered systems for defense, space, environmental and energy applications. We differentiate ourselves from many of our direct competitors by having a customer- and Company-sponsored applied research center that augments our product development expertise. We believe our technological capabilities, innovation and the ability to invest in the development of new and enhanced products are critical to obtaining and maintaining leadership in our markets and the industries in which we compete.
 Information about results of operations and financial conditions for 2021 and 2022 can be found in "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections in the Company's Annual Report on Form 10-K for the year ended January 1, 2023.

 Strategy/Overview
 Our strategy continues to emphasize growth in our four business segments: Digital Imaging, Instrumentation, Aerospace and Defense Electronics and Engineered Systems. The markets in which we sell our enabling technologies are characterized by high barriers to entry and include specialized products and services not likely to be commoditized. We intend to strengthen and expand our business with targeted acquisitions and through product development. We continue to focus on balanced and disciplined capital deployment among capital expenditures, acquisitions and product development. We aggressively pursue operational excellence to continually improve our margins and earnings by emphasizing cost containment and evaluating cost reductions in all aspects of our business. At Teledyne, operational excellence includes the rapid integration of the businesses we acquire. Using complementary technology across our businesses and through targeted research and development, we seek to create new products to grow our company and expand our addressable markets. We continually evaluate our businesses to ensure that they are aligned with our strategy.
 Trends and Other Matters Affecting Our Business
 We have experienced supply chain challenges, including long lead times, as well as cost inflation for parts and components, logistics and labor due to availability constraints and high demand. These supply chain challenges have also delayed our ability to timely convert backlog to revenue. Although perhaps to a lesser extent compared to recent years, we expect cost inflation impacts and supply chain constraints to continue into 2024.
 Sales recorded and costs incurred by subsidiaries operating outside of the United States are translated into U.S. dollars using exchange rates effective during the respective period. As a result, we are exposed to movements in the exchange rates of various currencies against the U.S. dollar. See Item 7a. Market Risk, Note 1 and Note 14 for additional discussion around our derivative instruments and hedging activities.
 To date, we have not been materially impacted by the conflict in Israel and its effect on neighboring regions. We do not have material assets in Israel. Our total sales from Israel in 2023 and 2022 was less than 1.0% of total net sales, respectively. See Item 1a. Risk Factors for additional discussion.
 As part of a continuing effort to reduce costs and improve operating performance, we may take and have taken actions to consolidate and relocate certain facilities and reduce headcount across various businesses, reducing our exposure to weaker end markets. We continue to seek cost reductions in our businesses. For 2023, 2022 and 2021, we recorded $12.0 million of costs, $0.5 million of benefits and $26.4 million of costs, respectively, related to these actions, with the majority of the costs included within selling, general and administrative expense within the Digital Imaging segment. At December 31, 2023, $2.9 million remains to be paid related to actions taken in 2023. In 2022, we, recorded a net benefit of $0.5 million, which related to $3.5 million of costs related to headcount or facility consolidation costs, partially offset by $4.0 million of income related to the favorable resolution of a facility consolidation charge within the Digital Imaging segment.

 Recent Acquisitions
 Consistent with our strategy, we completed two acquisitions each in 2023 and in 2022. The financial results of these acquisitions have been included since the respective date of each acquisition. Our 2023 acquisitions were within the Digital Imaging and Instrumentation segments, and both acquisitions in 2022 were part of the Digital Imaging segment. See Note 3 for additional information about our recent business acquisitions.

 Selected Consolidated Operating Results
 Our fiscal year is determined based on a 52- or 53-week convention ending on the Sunday nearest to December 31. Fiscal years 2023 and 2022 each contained 52 weeks.

 2023

 2022

 $
 $
 $
 176.9
 3.2
 %

 Costs and expenses

 3,196.1
 3,128.3
 67.8
 2.2
 %

 Selling, general and administrative
 1,208.3
 1,156.6
 51.7
 4.5
 %

 196.7
 201.7
 (5.0)
 (2.5)
 %

 Total costs and expenses
 4,601.1
 4,486.6
 114.5
 2.6
 %

 Operating income (loss)
 1,034.4
 972.0
 62.4
 6.4
 %

 Net income (loss) attributable to Teledyne
 $
 885.7
 $
 788.6
 $
 97.1
 12.3
 %

 Diluted earnings per common share
 $
 18.49
 $
 16.53
 $
 1.96
 11.9
 %

 Total year 2023 net sales included $99.8 million in incremental net sales from current and prior year acquisitions.

 Net income for 2023 and 2022 also included net discrete tax benefits of $137.5 million and $86.7 million, respectively.

 Consolidated Results of Operations
 Our businesses are aligned in four segments: Digital Imaging, Instrumentation, Aerospace and Defense Electronics and Engineered Systems. Additional financial information about our business segments can be found in Note 4.
 Net sales (dollars in millions)
 2023

 2022

 $
 $
 $
 33.2
 1.1
 %

 72.2
 5.8
 %

 726.5
 682.4
 44.1
 6.5
 %

 438.7
 411.3
 27.4
 6.7
 %

 Total net sales
 $
 $
 $
 176.9
 3.2
 %

 Results of operations (dollars in millions)
 2023

 2022

 $
 517.4
 $
 519.3
 $
 (1.9)
 (0.4)
 %

 338.3
 295.3
 43.0
 14.6
 %

 199.6
 184.1
 15.5
 8.4
 %

 44.7
 39.2
 5.5
 14.0
 %

 Corporate expense

 (65.6)
 (65.9)
 0.3
 (0.5)
 %

 Operating income (loss)
 1,034.4
 972.0
 62.4
 6.4
 %

 Interest and debt expense, net

 (77.3)
 (89.3)
 12.0
 (13.4)
 %

 Non-service retirement benefit income
 12.4
 11.4
 1.0
 8.8
 %

 Gain (loss) on debt extinguishment
 1.6
 10.6
 (9.0)
 (84.9)
 %

 Other income (expense), net

 (12.2)
 3.4
 (15.6)
 *

 Income (loss) before income taxes

 958.9
 908.1
 50.8
 5.6
 %

 Provision (benefit) for income taxes

 72.3
 119.2
 (46.9)
 (39.3)
 %

 Net income (loss) including noncontrolling interest
 886.6
 788.9
 97.7
 12.4
 %

 Less: Net income (loss) attributable to noncontrolling interest

 0.9
 0.3
 0.6
 200.0
 %

 Net income (loss) attributable to Teledyne
 $
 885.7
 $
 788.6
 $
 97.1
 12.3
 %

 * not meaningful

 Net Sales:
 Net sales increased across all business segments. Total year 2023 net sales included $99.8 million in incremental net sales from current and prior year acquisitions. Refer to the "Business Segment Operating Results" discussion later in this section for additional discussion of changes in net sales. Sales to international customers represented approximately 49% of net sales in 2023 and 47% of net sales in 2022. Approximately 25% and 25% of our total net sales 2023 and 2022, respectively, were derived from contracts with agencies of, or prime contractors to, the U.S. Government.
 Cost of Sales
 Cost of sales increased in 2023, primarily driven by the impact of higher net sales. Cost of sales as a percentage of net sales for 2023 was 56.7%, compared with 57.3% for 2022. Refer to the "Business Segment Operating Results" discussion later in this section for additional discussion of changes in cost of sales.
 Selling, General and Administrative Expenses
 Selling, general and administrative expenses, including research and development expense, were higher in 2023, primarily driven by higher net sales in 2023. Selling, general and administrative expenses as a percentage of net sales was 21.4% for 2023, compared with 21.2% for 2022. Corporate expense in 2023 was $65.6 million, compared with $65.9 million in 2022.
 Acquired Intangible Asset Amortization
 Acquired intangible asset amortization for 2023 was $196.7 million, compared with $201.7 million for 2022, primarily related to decreased expense within the Digital Imaging and Instrumentation segments.
 Operating Income
 Operating income increased in 2023 due to higher operating income in each segment except the Digital Imaging segment.
 Non-operating Income and Expenses
 Interest expense, including credit facility fees and other bank charges and net of interest income, was $77.3 million in 2023, compared with $89.3 million in 2022. The decrease was due primarily to reduced outstanding borrowings with lower weighted average interest rates compared to 2022. In 2023, the Company repurchased and retired $10.0 million of its Fixed

 Rate Senior Notes due April 2031, recording a $1.6 million non-cash gain on the extinguishment of this debt. In 2022, the Company repurchased and retired $75.0 million of its Fixed Rate Senior Notes due August 2030 and April 2031, recording a $10.6 million non-cash gain on the extinguishment of this debt. The other expense, net in other income and expense, net, in 2023 was driven primarily by foreign exchange losses, net as well as higher expense from deferred compensation plan activity, compared to the 2022 other income, net amount, which included foreign exchange gains, net as well as higher income from deferred compensation plan activity.
 Income Taxes
 The income tax provision considers income, permanent items, tax credits, and various statutory tax rates. Both the current and prior year discrete impact includes the resolution of uncertain tax positions which are primarily acquisition related and tax benefits on stock-based compensation. See Note 9 for further information regarding our income taxes.

 2023
 2022

 Provision (benefit) for income taxes
 $
 72.3
 $
 119.2

 Discrete event expense (benefit)
 $
 137.5
 $
 86.7

 Provision (benefit) for income taxes without discrete event expense (benefit)
 $
 209.8
 $
 205.9

 Income (loss) before income taxes
 $
 958.9
 $
 908.1

 Effective tax rate
 7.5%
 13.1%

 Effective tax rate without discrete events
 21.9%
 22.7%

 Business Segment Operating Results
 The following discussion of our four segments should be read in conjunction with Note 4.

 2023
 2022

 $
 $
 $
 33.2
 1.1%

 $
 1,711.4
 $
 1,705.6
 $
 5.8
 0.3%

 Selling, general and administrative expenses
 $
 733.6
 $
 702.3
 $
 31.3
 4.5%

 $
 181.7
 $
 183.7
 $
 (2.0)
 (1.1)%

 Operating income
 $
 517.4
 $
 519.3
 $
 (1.9)
 (0.4)%

 Cost of sales % of net sales
 54.4
 %
 54.8
 %
 (0.4)%

 Selling, general and administrative expenses % of net sales
 23.3
 %
 22.6
 %
 0.7%

 Acquired intangible asset amortization % of net sales
 5.8
 %
 5.9
 %
 (0.1)%

 Operating income % of net sales

 16.5
 %
 16.7
 %
 (0.2)%

 International sales % of net sales

 55.3
 %
 54.5
 %
 0.8%

 U.S. Government sales % of net sales

 18.2
 %
 19.9
 %
 (1.7)%

 Our Digital Imaging segment includes high-performance sensors, cameras and systems, within the visible, infrared and X-ray spectra for use in industrial, government and medical applications, as well as MEMS and high-performance, high-reliability semiconductors including analog-to-digital and digital-to-analog converters. It also includes our customer- and Company-sponsored applied research center which benefits government programs and commercial businesses.
 Our Digital Imaging segment net sales for 2023 increased 1.1%, compared with 2022. Operating income for 2023 decreased 0.4%, compared with 2022.
 Total year 2023 net sales included $97.3 million in incremental net sales from current and prior year acquisitions as well as organic sales growth from X-ray products, infrared imaging detectors and surveillance systems, offset by lower sales of unmanned air and ground systems for defense applications, MEMS, and commercial maritime and commercial infrared products. The decrease in operating income in 2023 reflected the impact of higher employee severance and facility consolidation costs, which included $9.4 million of expense in 2023 compared with $1.9 million of income in 2022. The 2022 severance and facility consolidation costs amount included $4.0 million of income related to the favorable resolution of a facility consolidation charge in 2022.
 Cost of sales for 2023 increased compared with 2022, and reflected the impact of higher net sales, partially offset by product mix, including lower sales of unmanned ground systems offset by sales of higher margin products. The cost of sales percentage in 2023 decreased compared with 2022 and reflected the impact of product mix. Selling, general and administrative expenses for 2023 increased 4.5% compared with 2022 and reflected the impact of higher net sales and higher severance and facility consolidation expense. The selling, general and administrative expense percentage increased in 2023 compared with 2022, driven by higher employee compensation costs as well as higher employee severance and facility consolidation costs.

 2023
 2022

 $
 $
 $
 72.2
 5.8%

 $
 692.6
 $
 668.7
 $
 23.9
 3.6%

 Selling, general and administrative expenses
 $
 281.1
 $
 272.8
 $
 8.3
 3.0%

 $
 14.2
 $
 17.2
 $
 (3.0)
 (17.4)%

 Operating income
 $
 338.3
 $
 295.3
 $
 43.0
 14.6%

 Cost of sales % of net sales
 52.2
 %
 53.3
 %
 (1.1)%

 Selling, general and administrative expenses % of net sales
 21.2
 %
 21.8
 %
 (0.6)%

 Acquired intangible asset amortization % of net sales
 1.1
 %
 1.4
 %
 (0.3)%

 Operating income % of net sales
 25.5
 %
 23.5
 %
 2.0%

 International sales % of net sales
 57.3
 %
 55.8
 %
 1.5%

 U.S. Government sales % of net sales
 7.2
 %
 8.6
 %
 (1.4)%

 Our Instrumentation segment provides monitoring and control instruments for marine, environmental, industrial and other applications, as well as electronic test and measurement applications. We also provide power and communications connectivity devices for distributed instrumentation systems and sensor networks deployed in mission critical, harsh environments.
 Our Instrumentation segment net sales for 2023 increased 5.8%, compared with 2022. Operating income for 2023 increased 14.6%, compared with 2022.
 In 2023, net sales of marine instrumentation increased $69.0 million, and net sales of test and measurement instrumentation increased $10.1 million compared with 2022. Net sales of environmental instrumentation decreased $6.9 million compared with 2022. The increase in operating income in 2023 reflected the impact of higher net sales, improved product margins and lower acquired intangible asset amortization.
 Cost of sales increased in 2023, compared with 2022, and primarily reflected the impact of higher net sales. The cost of sales percentage decreased in 2023 compared with 2022 primarily driven by product mix and improved product margins. Selling, general and administrative expenses, including research and development expense increased in 2023 compared with 2022, primarily driven by higher net sales. Selling, general and administrative expenses for 2023, as a percentage of sales, decreased from 2022, primarily due to the impact of higher net sales while maintaining focus on cost control. Acquisition intangible asset amortization expense decreased primarily to lower intangible amortization for the test and measurement instrumentation product line, as certain historical acquisition intangibles became fully amortized in late 2022.

 2023
 2022

 $
 726.5
 $
 682.4
 $
 44.1
 6.5%

 $
 424.6
 $
 407.8
 $
 16.8
 4.1%

 Selling, general and administrative expenses
 $
 101.5
 $
 89.7
 $
 11.8
 13.2%

 $
 0.8
 $
 0.8
 $
 —
 —%

 Operating income
 $
 199.6
 $
 184.1
 $
 15.5
 8.4%

 Cost of sales % of net sales
 58.4
 %
 59.8
 %
 (1.4)%

 Selling, general and administrative expenses % of net sales
 14.0
 %
 13.1
 %
 0.9%

 Acquired intangible asset amortization % of net sales
 0.1
 %
 0.1
 %
 —%

 Operating income % of net sales

 27.5
 %
 27.0
 %
 0.5%

 International sales % of net sales

 32.3
 %
 27.5
 %
 4.8%

 U.S. Government sales % of net sales

 45.5
 %
 39.0
 %
 6.5%

 Our Aerospace and Defense Electronics segment provides sophisticated electronic components and subsystems and communications products, including defense electronics, harsh environment interconnects, data acquisition and communications equipment for aircraft, components and subsystems for wireless and satellite communications and general aviation batteries.
 Our Aerospace and Defense Electronics segment net sales for 2023 increased 6.5%, compared with 2022. Operating income for 2023 increased 8.4%, compared with 2022.
 The 2023 net sales increase compared with 2022 reflected $25.2 million of higher sales for aerospace electronics and

 $18.9 million of higher sales for defense electronics. The increase in operating income for 2023 primarily reflected the impact of higher net sales and favorable product mix, partially offset by higher research and development expense.
 Cost of sales for 2023 increased compared with 2022 and reflected the impact of higher net sales partially offset by favorable product mix. Cost of sales as a percentage of net sales for 2023 decreased compared with 2022 and primarily reflected product mix, including the increased sales of aerospace electronics which carry a higher margin than most defense electronics products. Selling, general and administrative expenses, including research and development expense, increased in 2023 compared with 2022 and included $3.2 million of higher research and development expense in 2023. The higher research and development expense primarily reflected higher spending for aerospace electronics. The selling, general and administrative expense percentage in 2023 increased compared with 2022 and reflected the higher research and development expense.

 2023
 2022

 $
 438.7
 $
 411.3
 $
 27.4
 6.7%

 $
 367.5
 $
 346.2
 $
 21.3
 6.2%

 Selling, general and administrative expenses
 $
 26.5
 $
 25.9
 $
 0.6
 2.3%

 Operating income
 $
 44.7
 $
 39.2
 $
 5.5
 14.0

 Cost of sales % of net sales
 83.8
 %
 84.2
 %
 (0.4)
 %

 Selling, general and administrative expenses % of net sales
 6.0
 %
 6.3
 %
 (0.3)
 %

 Operating income % of net sales

 10.2
 %
 9.5
 %
 0.7
 %

 International sales % of net sales

 1.9
 %
 1.1
 %
 0.8
 %

 U.S. Government sales % of net sales

 87.7
 %
 89.1
 %
 (1.4)
 %

 Our Engineered Systems segment provides innovative systems engineering and integration, advanced technology development, and manufacturing solutions for defense, space, environmental and energy applications, including the design and manufacture of electrochemical energy systems.
 Our Engineered Systems segment net sales for 2023 increased 6.7%, compared with 2022. Operating income for 2023 increased 14.0%, compared with 2022.
 The 2023 net sales increase primarily reflected $17.9 million of higher sales for engineered products and $9.5 million of higher sales for energy systems. The higher net sales for engineered products primarily reflected increased sales from space and electronic manufacturing services programs products, partially offset by decreased sales in missile defense, maritime, and other manufacturing programs. Operating income in 2023 primarily reflected the impact of favorable product mix, primarily driven by higher electronic manufacturing services products.
 Cost of sales for 2023 increased compared with 2022, and primarily reflected the impact of higher net sales. Cost of sales as a percentage of net sales for 2023 decreased compared with 2022. Selling, general and administrative expenses in 2023, including research and development and bid and proposal expense, increased slightly compared with 2022. The selling, general and administrative expense as a percentage of net sales decreased slightly compared with 2022.

 Financial Condition, Liquidity and Capital Resources
 Principal Cash and Capital Requirements
 Our principal cash and capital requirements are to fund working capital needs, capital expenditures, income tax payments and debt service requirements, as well as acquisitions. It is anticipated that operating cash flow, together with available borrowings under the credit facility and the debt financing arrangements described below, will be sufficient to meet these requirements. To support acquisitions, we may need to raise additional capital. Our liquidity is not dependent upon the use of off-balance sheet financial arrangements. We have no off-balance sheet financing arrangements that incorporate the use of special purpose or unconsolidated entities.
 Cash and Cash Equivalents
 Cash and cash equivalents totaled $648.3 million at December 31, 2023, of which $369.1 million was held by foreign subsidiaries. Cash equivalents consist of highly liquid money-market mutual funds with maturities of three months or less when purchased.
 Long-term Debt
 Long-term debt, including unamortized debt issuance costs was $3,244.9 million at December 31, 2023 compared to $3,920.6 million at January 1, 2023. During 2023, we repaid $125.0 million of amount on its credit facility, the $300.0 million Fixed Rate Senior Notes due April 2023, and the remaining $245.0 million on our term loan due May 2026. We also

 repurchased and retired $10.0 million of our Fixed Rate Senior Notes due April 2031, recording a $1.6 million non-cash gain on the extinguishment of this debt.
 At December 31, 2023, we had $41.9 million in outstanding letters of credit.
 The credit agreement and term loans require us to comply with various financial and operating covenants and at December 31, 2023, the Company was in compliance with these covenants and had a significant amount of margin between required financial covenant ratios and our actual ratios. Currently, we do not believe our ability to undertake additional debt financing, if needed, is reasonably likely to be materially impacted by debt restrictions under our credit agreements. Available borrowing capacity under the $1.15 billion credit facility, which is reduced by borrowings and $20.9 million in outstanding letters of credit, was $1,129.1 million at December 31, 2023.
 See Note 8 for additional information regarding our credit facility and long-term debt.
 Contractual Obligations
 The following table summarizes our expected cash outflows resulting from financial contracts and commitments at December 31, 2023:
 Contractual obligations (in millions):
 2024
 2025
 2026
 2027
 2028
 After 2029
 Total

 Debt obligations
 $
 600.1
 $
 0.2
 $
 450.2
 $
 0.2
 $
 700.1
 $
 1,515.2
 $
 3,266.0

 Interest expense (a)
 73.1
 65.1
 59.7
 57.9
 44.8
 105.2
 405.8

 Operating lease obligations (b)
 36.4
 33.2
 27.3
 22.3
 15.9
 39.4
 174.5

 Purchase obligations (c)
 269.5
 28.9
 2.2
 0.8
 0.8
 1.8
 304.0

 Total
 $
 979.1
 $
 127.4
 $
 539.4
 $
 81.2
 $
 761.6
 $
 1,661.6
 $
 4,150.3

 (a) Interest expense related to the credit facility, including facility fees, is assumed to accrue at the rates in effect at year-end 2023 and is assumed to be paid at the end of each quarter with the final payment in March 2026 when the credit facility expires.
 (b) Includes imputed interest and the short-term portion of lease obligations.
 (c) Purchase obligations generally include contractual obligations for the purchase of goods and services and capital commitments that are enforceable and legally binding on us and that specifies all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum, or variable price provisions; and the approximate timing of the transaction.
 Unrecognized tax benefits of $96.5 million and accrued interest and penalties on these tax matters of $36.9 million are not included in the table above. The remaining unrecognized tax benefits and accrued interest and penalties are not included in the table above because $28.9 million is offset by deferred tax assets, and the remainder cannot be reasonably estimated to be settled in cash due to a lack of prior settlement history and offsetting credits.
 At December 31, 2023, we were not required, and accordingly are not planning, to make any cash contributions to the domestic qualified pension plans for 2024. Our minimum funding requirements after 2023 as set forth by the Employee Retirement Income Security Act, are dependent on several factors. Estimates beyond 2024 have not been provided due to the significant uncertainty of these amounts, which are subject to change until the Company's pension assumptions can be updated at the appropriate times. In addition, certain pension contributions are eligible for future recovery through the pricing of products and services to the U.S. Government under certain government contracts, therefore, future cash contributions are not necessarily indicative of the impact these contributions may have on our liquidity. We also have payments due under our other postretirement benefit plans. These plans are not required to be funded in advance but are pay as you go. See further discussion in Note 10. We monitor and manage our defined benefit pension plans obligation and may take additional actions to manage risk in the future.
 Operating Activities
 Net cash provided by operating activities was $836.1 million and $486.8 million in 2023 and 2022, respectively. The higher cash provided by operating activities in 2023, compared with 2022 primarily resulted from a payment of $296.4 million to the Swedish Tax Authority in the first quarter of 2022, related to a disputed pre-acquisition 2018 tax reassessment issued to a FLIR subsidiary in Sweden as well as lower inventory purchases and stronger accounts receivable collections in 2023 compared with 2022. These changes were partially offset by higher accounts payable and income tax payments in 2023 as compared with 2022.
 Free cash flow (cash provided by operating activities less capital expenditures) and adjusted free cash flow (both non-GAAP measures) were as follows (in millions):
 Free Cash Flow(a)

 2023
 2022

 Cash provided by (used in) operating activities
 $
 836.1
 $
 486.8

 Less: Capital expenditures for property, plant and equipment
 (114.9)
 (92.6)

 Free cash flow
 721.2
 394.2

 Add back: Payment for acquisition-related tax matter
 —
 296.4

 Adjusted free cash flow
 $
 721.2
 $
 690.6

 (a) We define free cash flow as cash provided by operating activities (a measure prescribed by GAAP) less capital expenditures for property, plant and equipment. Adjusted free cash flow eliminates the impact of cash paid for transaction related expenses for the FLIR acquisition on a net of tax basis as well as the payment of a pre-acquisition 2018 tax reassessment issued to a FLIR subsidiary in Sweden. We believe that this supplemental non-GAAP information is useful to assist management and the investment community in analyzing the company's ability to generate cash flow.
 Investing Activities
 Net cash used in investing activities was $190.3 million and $175.4 million for 2023 and 2022, respectively. Investing activities used cash for acquisitions and other investments of $77.7 million and $99.6 million in 2023 and 2022, respectively (see "Recent Acquisitions"). We funded the acquisitions from borrowings under our credit facilities and cash on hand.
 Cash flows relating to investing activities for capital expenditures.

 Capital expenditures (in millions):
 2023
 2022

 $
 78.2
 $
 63.9

 14.0
 9.3

 10.9
 8.0

 3.4
 5.3

 Corporate
 8.4
 6.1

 $
 114.9
 $
 92.6

 During 2024, we plan to invest approximately $105 million in capital expenditures, principally to upgrade facilities and manufacturing equipment.
 Financing Activities
 Financing activities reflected net payments from debt of $678.9 million in 2023 and $174.8 million in 2022. Fiscal years 2023 and 2022 reflect proceeds from the exercise of stock options of $45.4 million and $23.6 million, respectively.
 During 2023, we repaid $125.0 million of amounts outstanding on its credit facility, the $300.0 million Fixed Rate Senior Notes due April 2023, and the remaining $245.0 million on its term loan due May 2026. We also repurchased and retired $10.0 million of its Fixed Rate Senior Notes due April 2031, recording a $1.6 million non-cash gain on the extinguishment of this debt.
 During 2022, we repaid $185.0 million of debt. We made $110.0 million of floating rate debt payments on its term loan due May 2026. We also repurchased and retired $75.0 million of its Fixed Rate Senior Notes due August 2030 and April 2031, recording a $10.6 million non-cash gain on the extinguishment of this debt.
 Other Matters
 Income Taxes
 Our income tax expense, deferred tax assets and liabilities, and reserves for unrecognized tax benefits reflect management's best assessment of estimated current and future taxes to be paid. We are subject to income taxes in both the United States and numerous foreign jurisdictions. Significant judgments and estimates are required in determining the consolidated income tax expense.
 The Company continually evaluates its global cash needs and has historically asserted that most of its unremitted foreign earnings are permanently reinvested and did not generally record deferred taxes on such amounts. During 2022, the Company determined that it could no longer make the assertion foreign earnings are permanently reinvested, as cash from most foreign subsidiaries may be remitted without incurring additional U.S. federal income tax. As a result, the Company changed its indefinite reinvestment assertion of unremitted earnings and certain other aspects of outside basis differences on a majority of its foreign subsidiaries.
 The Company continues to make an indefinite reinvestment assertion on the historic excess of the financial reporting bases over tax bases in its material foreign subsidiaries in Canada. The unremitted earnings of the Company's Canadian foreign subsidiaries held for indefinite reinvestment are used to finance Canadian operations and investments. The Company estimate that future cash generation from non-Canadian operations will be sufficient to meet future domestic cash requirements. Determination of the unrecognized deferred tax liability for unremitted Canadian earnings is not practicable due to uncertainty and overall complexity of the potential calculations. The Company continues to evaluate its cash needs and may update its assertion in future periods.
 Deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amount in the financial statements, which will result in taxable or deductible amounts in the future. In evaluating our ability to recover our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results adjusted for the results of discontinued operations and incorporate assumptions about the amount of future state, federal and foreign pretax operating income adjusted for items that do not have tax consequences. The assumptions about future taxable income require significant

 judgment and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider three years of cumulative operating income. Based on the Company's history of operating earnings, expectations of future operating earnings and potential tax planning strategies, management believes that it is possible that some portion of deferred taxes will not be realized as a future tax benefit and therefore has recorded a valuation allowance.
 We file income tax returns in the United States federal jurisdiction and in various states and foreign jurisdictions. We have substantially concluded income tax matters in the U.S. through 2016, in Canada through 2012, in Sweden through 2018, in Norway through 2018, in Belgium through 2019, in France through 2019 and in the United Kingdom through 2015.
 Costs and Pricing
 Inflation has been rising in the markets in which we operate. Current inventory costs, the increasing costs of labor, materials, equipment and other costs are considered in establishing sales pricing policies. The Company emphasizes cost containment and cost reductions in all aspects of its business.
 Market Risk Disclosures
 Our primary exposure to market risk relates to changes in interest rates and foreign currency exchange rates. We periodically evaluate these risks and have taken measures to mitigate these risks. We own assets and operate facilities in countries that have been politically stable.
 Interest Rate Risk
 We are exposed to market risk through the interest rate on our borrowings under our $1.15 billion credit facility. As of December 31, 2023, no borrowings are outstanding under our credit facility. Future indebtedness incurred under our credit facility will expose us to interest rate risk.
 Foreign Currency Exchange Rate Risk
 Teledyne transacts business in various foreign currencies and has international sales and expenses denominated in foreign currencies, subjecting the Company to foreign currency risk. Our primary foreign currency risk management objective is to protect the U.S. dollar value of future cash flows and minimize the volatility of reported earnings, primarily achieved through the following:
 • We utilize foreign currency forward contracts to reduce the volatility of cash flows primarily related to forecasted revenue and expenses denominated in Canadian dollars for our Canadian companies, and in British pounds for our U.K. companies. These contracts are designated and qualify as cash flow hedges.
 • We have converted a U.S. dollar denominated, variable rate obligation of a European subsidiary, into a euro fixed rate obligation using a receive float, pay fixed cross currency swap. This cross currency swap is designated as a cash flow hedge.
 • We utilize foreign currency forward contracts to mitigate foreign exchange rate risk associated with foreign currency denominated monetary assets and liabilities, including intercompany receivables and payables.
 All derivatives are recorded on the balance sheet at fair value. The accounting for gains and losses resulting from changes in fair value depends on the use of the derivative and whether it is designated and qualifies for hedge accounting. Teledyne does not use foreign currency forward contracts for speculative or trading purposes. Refer to Notes 2, 14 and 15 for further disclosures around our derivative instruments and hedging activities.
 Notwithstanding our efforts to mitigate portions of our foreign currency exchange rate risks, there can be no assurance that our hedging activities will adequately protect us against the risks associated with foreign currency fluctuations. A hypothetical 10% price change of the U.S. dollar from its value at December 31, 2023, would result in a decrease or increase in the fair value of our foreign currency forward contracts designated as cash flow hedges to buy Canadian dollars and to sell U.S. dollars by approximately $16.4 million. A hypothetical 10% price change in the U.S. dollar from its value at December 31, 2023 would result in a decrease or increase in the fair value of our foreign currency forward contracts designated as cash flow hedges to buy British Pounds and to sell U.S. dollars by approximately $1.7 million. A hypothetical 10% price change in the U.S. dollar from its value at December 31, 2023 would result in a decrease or increase in the fair value of our Euro/U.S. Dollar cross currency swap designated as cash flow hedges by approximately $17.3 million.
 Environmental
 We are subject to various federal, state, local and international environmental laws and regulations which require that we investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. These include sites at which Teledyne has been identified as a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act, commonly known as Superfund, and comparable state laws. We are currently involved in the investigation and remediation of a number of sites. Reserves for environmental investigation and remediation totaled $5.4 million and $5.8 million as of December 31, 2023 and January 1, 2023, respectively. As investigation and remediation of these sites proceed and new information is received, the Company will adjust reserves to reflect new

 information. Based on current information, we do not believe that future environmental costs, in excess of those already accrued, will materially and adversely affect our financial condition or liquidity. See also our environmental risk factor disclosure in Item 1A. Risk Factors as well as additional discussion in Notes 2 and 1 7.
 U. S. Government Contracts
 We perform work on a number of contracts with the U.S. Department of Defense and other agencies and departments of the U.S. Government including sub-contracts with government prime contractors. Sales under these contracts with the U.S. Government, which included contracts with the U.S. Department of Defense, were 24.5% and 24.9% of our total net sales in 2023 and 2022, respectively. For a summary of sales to the U.S. Government by segment, see Note 4. Sales to the U.S. Department of Defense represented approximately 19% and 20% of total net sales for 2023 and 2022, respectively.
 Performance under government contracts has certain inherent risks that could have a material adverse effect on the Company's business, results of operations and financial condition. Government contracts are conditioned upon the continuing availability of Congressional appropriations, which usually are made available on a fiscal year basis even though contract performance may take more than one year. See also our government contracts risks factor disclosure in Item 1A. Risk Factors.
 For information on accounts receivable from the U.S. Government, see Note 7.
 Estimates and Reserves
 Our discussion and analysis of financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent liabilities. On an ongoing basis, we evaluate our estimates, including those related to product returns and replacements, allowance for doubtful accounts, inventory, intangible assets, income taxes, warranty obligations, pension and other postretirement benefits, long-term contracts, environmental, workers' compensation and general liability, employee benefits and other contingencies and litigation. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances at the time, the results of which form the basis for making our judgments. Actual results may differ materially from these estimates under different assumptions or conditions. See Critical Accounting Policies and Estimates for further information on key estimates.
 Some of the Company's products are subject to standard warranties and the Company provides for the estimated cost of product warranties. We regularly assess the adequacy of our pre-existing warranty liabilities and adjust amounts as necessary based on a review of historical warranty experience with respect to the applicable business or products, as well as the length and actual terms of the warranties, which are typically one year. See further discussion in Note 7.

 Critical Accounting Policies and Estimates
 The preparation of our consolidated financial statements in conformity with United States generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and the notes to the financial statements. Some of those judgments can be subjective and complex, and therefore, actual results could differ materially from those estimates under different assumptions or conditions. Our critical accounting policies are those that are reflective of significant judgment, complexity and uncertainty, and may potentially result in materially different results under different assumptions and conditions. We have identified the following as critical accounting policies: revenue recognition; accounting for business combinations, goodwill and acquired intangible assets; and accounting for income taxes. For additional discussion of the application of these and other accounting policies, see Note 2.
 Revenue Recognition
 Approximately 30% of our revenue was recognized over time, with the remaining 70% recognized at a point in time.
 Revenue recognized over time relates primarily to contracts to design, develop and/or manufacture highly engineered products used in both defense and commercial applications. The transaction price in these arrangements may include estimated amounts of variable consideration, including award fees, incentive fees, contract amounts not yet funded, or other provisions that can either increase or decrease the transaction price. We estimate variable consideration at the amount to which we expect to be entitled, and we include estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the estimation uncertainty is resolved. The estimation of this variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. As control transfers continuously over time on these contracts, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. We generally use the cost-to-cost measure of progress as this measure best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost method, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation.

 For over time contracts using the cost-to-cost method, we have an Estimate at Completion ("EAC") process in which management reviews the progress and execution of our performance obligations. This EAC process requires management judgment relative to assessing risks, estimating contract revenue, determining reasonably dependable cost estimates, and making assumptions for schedule and technical issues. Since certain contracts extend over a longer period of time, the impact of revisions in cost and revenue estimates during the progress of work may adjust the current period earnings through a cumulative catch-up basis. This method recognizes, in the current period, the cumulative effect of the changes on current and prior quarters. Additionally, if the current contract estimate indicates a loss, a provision is made for the total anticipated loss in the period that it becomes evident. Contract cost and revenue estimates for significant contracts are generally reviewed and reassessed at least quarterly. We do not believe that any discrete event or adjustment to an individual contract within the aggregate changes in contract estimates for 2023 and 2022 was material to the consolidated statement of income for such annual periods.
 Revenue recognized at a point in time relates primarily to the sale of standard or minimally customized products, with control transferring to the customer generally upon the transfer of title. See Note 5 for additional revenue recognition disclosures.
 Business Combinations, Goodwill and Acquired Intangible Assets
 The results for all acquisitions are included in the Company's consolidated financial statements from the date of each respective acquisition. Business acquisitions are accounted for under the acquisition method by assigning the purchase price to tangible and intangible assets acquired and liabilities assumed. Assets acquired and liabilities assumed are recorded at their fair values and the excess of the purchase price over the amounts assigned is recorded as goodwill. We determine the fair value of such assets and liabilities, often in consultation with third-party valuation advisors. Acquired intangible assets with finite lives are amortized over their estimated useful lives. Adjustments to fair value assessments are recorded to goodwill over the purchase price allocation period.
 Goodwill and acquired intangible assets with indefinite lives are not amortized. We review goodwill and acquired indefinite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of these assets may not be recoverable. The Company also performs an annual impairment test in the fourth quarter of each year. We test goodwill and acquired indefinite-lived intangible assets for impairment between annual tests if events occur or circumstances change that would more likely than not reduce our enterprise fair value below its book value. These events or circumstances could include a significant change in the business climate, including a significant sustained decline in an entity's market value, legal factors, operating performance indicators, competition, sale or disposition of a significant portion of the business, or other factors.
 We may use either a qualitative or quantitative approach when testing a reporting unit's goodwill for impairment. For reporting units where we use the qualitative approach, we perform a qualitative evaluation of events and circumstances impacting the reporting unit to determine the likelihood of goodwill impairment. Based on that qualitative evaluation, if we determine it is more likely than not that the fair value of a reporting unit exceeds its carrying amount, no further evaluation is necessary. Otherwise, we perform a quantitative impairment test. We perform a quantitative test for each reporting unit at least once every three years.
 For goodwill impairment testing using the quantitative approach, we estimate the fair value of the selected reporting units primarily through the use of a discounted cash flow model based on our best estimate of amounts and timing of future revenues and cash flows and our most recent business and strategic plans, and compares the estimated fair value to the carrying value of the reporting unit, including goodwill. The discounted cash flow model requires judgmental assumptions about projected revenue growth, future operating margins, discount rates and terminal values over a multi-year period. There are inherent uncertainties related to these assumptions and management's judgment in applying them to the analysis of goodwill impairment. While we believe we have made reasonable estimates and assumptions to calculate the fair value of its reporting units, it is possible a material change could occur. If actual results are not consistent with management's estimates and assumptions, goodwill may be overstated, and a charge would need to be taken against net earnings.
 When using a quantitative approach, changes in our projections used in the discounted cash flow model could affect the estimated fair value of certain of the Company's reporting units and could result in a goodwill impairment charge in a future period. In order to evaluate the sensitivity of the fair value calculations used in the quantitative goodwill impairment test, the Company will apply a hypothetical 10% decrease to the fair values of each reporting unit subject to a quantitative impairment test and compare those values to the reporting unit carrying values. Due to the many variables inherent in the estimation of a reporting unit's fair value and the relative size of our recorded goodwill, differences in assumptions may have a material effect on the results of our impairment analysis. Recently acquired reporting units generally represent a higher inherent risk of impairment, which typically decreases as the businesses are integrated into the Company.
 As of December 31, 2023, the Company had ten reporting units for goodwill impairment testing. In the fourth quarter of 2023, a quantitative test was performed for each reporting unit, and the carrying value of non-cash goodwill included in these reporting units ranged from $20.4 million to $5,832.4 million. With the exception of the FLIR reporting unit, the estimated fair value of all other reporting units exceeded their respective carrying value by more than 100%. At the assessment date, the estimated fair value of the FLIR reporting unit exceeded its carrying value by approximately $460 million or 6%. Although the

 forecasts used in the Company's discounted cash flow model are based on assumptions that are considered reasonable by management and consistent with the plans and estimates management uses to operate the underlying businesses, there is significant judgment in determining the expected results of the FLIR reporting unit. Changes in forecast estimates or the application of alternative assumptions could produce significantly different results. The discount rate, which is consistent with a weighted average cost of capital that is likely to be expected by a market participant, is based upon industry required rates of return, including consideration of both debt and equity components of the capital structure. Although no impairment exists for the FLIR reporting unit, a non-cash impairment of goodwill could result from a number of circumstances, including different assumptions used in determining the fair value of the reporting unit, changes to customer spending priorities, or a sharp increase in interest rates without a corresponding increase in future net sales.
 As of December 31, 2023, the Company had $850.0 million of indefinite-lived trademark intangibles which were subject to an annual impairment test in the fourth quarter of 2024. With the exception of the FLIR indefinite-lived trademark, the estimated fair value of all material indefinite-lived trademarks significantly exceeded their respective carrying value. Trademarks of recently acquired businesses generally represent a higher inherent risk of impairment, which typically decreases as the businesses are integrated into the Company. At the annual assessment date, the FLIR indefinite-lived trademark had a carrying value of $685.3 million and a fair value of $694.9 million. The most significant assumptions utilized in the determination of the fair value of the FLIR trademark are the net sales growth rates (including residual growth rates), discount rate and royalty rate. Although the FLIR sales forecasts are based on assumptions that are considered reasonable by management and consistent with the plans and estimates management uses to operate the underlying businesses, there is significant judgment in determining the expected results of the FLIR business. Changes in sales forecast estimates or the application of alternative assumptions could produce significantly different results. The discount rate, which is consistent with a weighted average cost of capital that is likely to be expected by a market participant, is based upon industry required rates of return, including consideration of both debt and equity components of the capital structure. The royalty rate was driven by historical and estimated future profitability of the underlying FLIR business, and the royalty rate assumption was consistent with assumptions used by the Company as part of the purchase price allocation of FLIR in 2021. The royalty rate may be impacted by significant adverse changes in long-term operating margins. Although no impairment exists for the FLIR trademark, a non-cash impairment of the trademark could result from a number of circumstances, including different assumptions used in determining the fair value of the trademark, changes to customer spending priorities, or a sharp increase in interest rates without a corresponding increase in future net sales.
 Income Taxes
 For a description of the Company's tax accounting policies, refer to Note 2 and Note 9. We make certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments occur in the calculation of tax credits, benefits and deductions, and in the calculation of certain tax assets and liabilities which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes. In addition, uncertainty exists regarding tax positions taken in previously filed tax returns still under examination and positions expected to be taken in the current year and future returns which may impact income tax expense. On a quarterly basis, we provide for income taxes based upon an estimated annual effective tax rate which is dependent on the geographic composition of worldwide earnings, tax regulations governing each region, availability of tax credits, and the effectiveness of our tax planning strategies. Although we believe our income tax expense is reasonable, no assurance can be given that the final tax outcome will not be different from that which is reflected in our historical income tax provisions. To the extent that the final tax outcome is different than the amounts recorded, such differences will impact the provision for income taxes in the period in which such determination is made. An increase of 100 basis points in our nominal tax rate would have resulted in additional income tax provision for the fiscal year ended December 31, 2023, of $9.6 million.
 Deferred tax assets and liabilities arise due to differences between the consolidated financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax carryforwards. Significant management judgment is required in determining whether deferred tax assets will be realized in full or in part. When it is more-likely-than-not that all or some portion of deferred tax assets may not be realized, a valuation allowance must be established against the deferred tax assets. In assessing the need for a valuation allowance, we consider all available positive and negative evidence including past operating results, estimates of future taxable income and the feasibility of tax planning strategies. In the event that we change our determination as to the amount of deferred tax assets that can be realized, we will adjust our valuation allowance with a corresponding impact to the provision for income taxes in the period in which such determination is made.
 The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations across domestic and foreign jurisdictions. We establish reserves for uncertain tax positions when, despite the belief that our tax positions are supportable, there remains uncertainty in a tax position taken in our filed tax returns or planned to be taken in a future tax return or claim. We follow a recognition and measurement approach, considering the facts, circumstances, and information available at the reporting date. Judgment is exercised in determining the level of evidence necessary and appropriate to support its assessment using all available information. The technical merits of a given tax position are derived from sources of authority in the tax law and their applicability to the facts and circumstances of the position. In measuring the

 tax position, we consider the amount and probabilities of the outcomes that could be realized upon settlement. When it is more-likely-than-not that a tax position will be sustained, we record a liability for the anticipated tax and interest due upon ultimate settlement with a taxing authority. Unrecognized tax benefits, including accrued penalties and interest, increased in 2021 due to the acquisition of FLIR. To the extent we prevail in matters for which reserves have been established or are required to pay amounts in excess of reserves, there could be a significant impact on our consolidated financial position and annual results of operations.
 Recent Accounting Standards
 For a discussion of recent accounting standards see Note 2.

 Safe Harbor Cautionary Statement Regarding Forward-Looking Information
 This Annual Report on Form 10-K contains forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995, directly and indirectly relating to earnings, growth opportunities, acquisitions and divestitures, product sales, capital expenditures, pension matters, stock option compensation expense, the credit facility, interest expense, severance and relocation costs, statements and goals relating to greenhouse gas emission reductions, environmental remediation cost, stock repurchases, taxes, exchange rate fluctuations and strategic plans. Forward-looking statements involve risks and uncertainties, are based on the current expectations of the management of Teledyne and are subject to uncertainty and changes in circumstances. All statements made in this Annual Report on Form 10-K that are not historical in nature should be considered forward-looking. Actual results could differ materially from these forward-looking statements.
 Many factors could change anticipated results, including: changes in relevant tax and other laws; foreign currency exchange risks; rising interest rates; risks associated with indebtedness, as well as our ability to reduce indebtedness and the timing thereof; the impact of semiconductor and other supply chain shortages; higher inflation, including wage competition and higher shipping costs; labor shortages and competition for skilled personnel; the inability to develop and market new competitive products; inherent uncertainties involved in the estimates and judgments used in the preparation of financial statements and the providing of estimates of financial measures, in accordance with U.S. GAAP and related standards; disruptions in the global economy; the ongoing conflict in Israel and neighboring regions, including related protests and the disruption to global shipping routes; the ongoing conflict between Russia and Ukraine, including the impact to energy prices and availability, especially in Europe; customer and supplier bankruptcies; changes in demand for products sold to the defense electronics, instrumentation, digital imaging, energy exploration and production, commercial aviation, semiconductor and communications markets; funding, continuation and award of government programs; cuts to defense spending resulting from existing and future deficit reduction measures or changes to U.S. and foreign government spending and budget priorities triggered by inflation, rising interest costs, and economic conditions; impacts from the United Kingdom's exit from the European Union; uncertainties related to the 2024 U.S. Presidential election; the imposition and expansion of, and responses to, trade sanctions and tariffs; the continuing review and resolution of FLIR's trade compliance and tax matters; escalating economic and diplomatic tension between China and the United States; threats to the security of our confidential and proprietary information, including cybersecurity threats; risks related to artificial intelligence; natural and man-made disasters, including those related to or intensified by climate change; and our ability to achieve emission reduction targets and decrease our carbon footprint. Lower oil and natural gas prices, as well as instability in the Middle East or other oil producing regions, and new regulations or restrictions relating to energy production, including those implemented in response to climate change, could further negatively affect our businesses that supply the oil and gas industry. Weakness in the commercial aerospace industry negatively affects the markets of our commercial aviation businesses. Ongoing issues with Boeing's 737 MAX product line could result in manufacturing delays and lower sales of our products to Boeing. In addition, financial market fluctuations affect the value of the company's pension assets. Changes in the policies of U.S. and foreign governments, including economic sanctions, could result, over time, in reductions or realignment in defense or other government spending and further changes in programs in which the company participates.
 While the company's growth strategy includes possible acquisitions, we cannot provide any assurance as to when, if or on what terms any acquisitions will be made. Acquisitions involve various inherent risks, such as, among others, our ability to integrate acquired businesses, retain key management and customers and achieve identified financial and operating synergies. There are additional risks associated with acquiring, owning and operating businesses internationally, including those arising from U.S. and foreign government policy changes or actions and exchange rate fluctuations.
 We continue to take action to assure compliance with the internal controls, disclosure controls and other requirements of the Sarbanes-Oxley Act of 2002. While we believe our control systems are effective, there are inherent limitations in all control systems, and misstatements due to error or fraud may occur and may not be detected.
 Additional information concerning factors that could cause actual results to differ materially from those projected in the forward-looking statements is contained beginning on page 6 of this Form 10-K under the caption "Risk Factors; Cautionary Statement as to Forward-Looking Statements." Forward-looking statements are generally accompanied by words such as "estimate", "project", "predict", "believes" or "expect", that convey the uncertainty of future events or outcomes. We assume no obligation to publicly update or revise any forward-looking statements, whether as a result of new information or otherwise.

 Item 7A. Quantitative and Qualitative Disclosures About Market Risk

 The information required by this item is included in this Report under the caption "Other Matters - Market Risk Disclosures" of "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation."

 Item 8.
 Financial Statements and Supplementary Data

 The information required by this item is included in this Report on pages 36 through 72. See the "Index to Financial Statements and Related Information" on page 36.

 Item 9.
 Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

 None.

 Item 9A.
 Controls and Procedures

 Disclosure Controls
 Teledyne's disclosure controls and procedures are designed to ensure that information required to be disclosed in reports that it files or submits, under the Exchange Act, was recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and to provide reasonable assurance that information required to be disclosed by us in such reports is accumulated and communicated to the Company's management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. The Company's Chief Executive Officer and Senior Vice President and Chief Financial Officer, with the participation and assistance of other members of management, have evaluated the effectiveness, as of December 31, 2023, of the Company's "disclosure controls and procedures," as that term is defined in Rule 13a-15(e) under the Exchange Act. Based upon that evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that the disclosure controls and procedures as of December 31, 2023, are effective.

 Internal Controls
 See Management Statement on page 37 for management's annual report on internal control over financial reporting. See Report of Independent Registered Public Accounting Firm on page 38 for Deloitte & Touche LLP's attestation report on the Report of Management on Teledyne Technologies Incorporated's Internal Control over Financial Reporting.
 There was no change in the Company's "internal control over financial reporting" (as such term is defined in Rule 13a-15(f) under the Exchange Act) that occurred during the quarter ended December 31, 2023, that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting. There also were no material weaknesses identified for which corrective action needed to be taken.

 Sarbanes-Oxley Disclosure Committee
 The Company maintains a Sarbanes-Oxley Disclosure Committee, which is comprised of senior representatives of the Company, including members of its accounting, finance, human resources, information technology, internal audit, legal and tax departments.
 Among its tasks, the Sarbanes-Oxley Disclosure Committee discusses and reviews disclosure issues to help us fulfill our disclosure obligations on a timely basis in accordance with SEC rules and regulations and is intended to be used as an additional resource for employees to raise questions regarding accounting, auditing, internal controls and disclosure matters. Our toll-free Ethics Help Line (1-877-666-6968) continues to be an alternative means to communicate concerns to the Company's management.

 Item 9B.
 Other Information

 Director and Officer Trading Arrangements
 None of the Company's directors or officers adopted or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement during the Company's fiscal quarter ended December 31, 2023.

 Item 9C.
 Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

 Not applicable.

 Item 10. Directors, Executive Officers and Corporate Governance
 The information required by this item is set forth in the 2024 Proxy Statement under the captions "Executive

 Management", "Item 1 on Proxy Card - Election of Directors," "Board Composition and Practices," "Corporate Governance," "Committees of Our Board of Directors - Audit Committee" and "Report of the Audit Committee" and is incorporated herein by reference.

 Item 11. Executive Compensation
 The information required by this item is set forth in the 2024 Proxy Statement under the captions "Executive and Director Compensation" and "Personnel and Compensation Committee Report" incorporated herein by reference.

 Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
 The information required by this item is set forth in the 2024 Proxy Statement under the caption "Stock Ownership Information" and "Securities Authorized for Issuance Under Equity Compensation Plans" and is incorporated herein by reference.

 Item 13. Certain Relationships and Related Transactions, and Director Independence
 The information required by this item is set forth in the 2024 Proxy Statement under the captions "Corporate Governance" and "Certain Transactions" and is incorporated herein by reference.

 Item 14. Principal Accountant Fees and Services
 The information required by this item is set forth in the 2024 Proxy Statement under the captions "Fees Billed by Independent Registered Public Accounting Firm" and "Audit Committee Pre-Approval Policies" under "Item 2 on Proxy Card - Ratification of Appointment of Independent Registered Public Accounting Firm" and is incorporated herein by reference.

 Item 15.
 Exhibits and Financial Statement Schedules

 (a) Exhibits and Financial Statement Schedules:
 (1) Financial Statements
 See the "Index to Financial Statements and Related Information" on page 36 of this Report, which is incorporated herein by reference.
 (2) Financial Statement Schedules
 See Schedule II captioned "Valuation and Qualifying Accounts" on page 72 of this Report, which is incorporated herein by reference.
 (3) Exhibits
 A list of exhibits filed with this Form 10-K or incorporated by reference is found in the Exhibit Index immediately following the certifications of this Report and incorporated herein by reference.
 (b) Exhibits:
 See Item 15(a)(3) above.
 (c) Financial Schedules:
 See Item 15(a)(2) above.

 INDEX TO FINANCIAL STATEMENTS AND RELATED INFORMATION

 Page

 Financial Statements and Related Information:

 Management Statement

 Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)

 Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)

 Consolidated Statements of Income

 Consolidated Statements of Comprehensive Income

 Consolidated Balance Sheets

 Consolidated Statements of Stockholders' Equity

 Consolidated Statements of Cash Flows

 Notes to Consolidated Financial Statements

 Financial Statement Schedule:

 Schedule II - Valuation and Qualifying Accounts

 MANAGEMENT STATEMENT

 RESPONSIBILITY FOR PREPARATION OF THE FINANCIAL STATEMENTS AND ESTABLISHING AND MAINTAINING ADEQUATE INTERNAL CONTROL OVER FINANCIAL REPORTING
 We are responsible for the preparation of the financial statements included in this Annual Report on Form 10-K. The financial statements were prepared in accordance with accounting principles generally accepted in the United States of America and include amounts that are based on the best estimates and judgments of management. The other financial information contained in this Annual Report on Form 10-K is consistent with the financial statements.
 Our internal control system is designed to provide reasonable assurance concerning the reliability of the financial data used in the preparation of Teledyne financial statements, as well as to safeguard the Company's assets from unauthorized use or disposition.
 All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement presentation.
 REPORT OF MANAGEMENT ON TELEDYNE TECHNOLOGIES INCORPORATED'S INTERNAL CONTROL OVER FINANCIAL REPORTING
 We are also responsible for establishing and maintaining adequate internal control over financial reporting. We conducted an evaluation of the effectiveness of the Company's internal control over financial reporting as of December 31, 2023. In making this evaluation, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (the COSO criteria) in Internal Control - Integrated Framework. Our evaluation included reviewing the documentation of our controls, evaluating the design effectiveness of our controls and testing their operating effectiveness. Based on this evaluation we believe that, as of December 31, 2023, the Company's internal controls over financial reporting were effective.
 Deloitte and Touche LLP, our independent registered public accounting firm, has issued its report on the effectiveness of Teledyne's internal control over financial reporting. Their report appears on page 38 of this Annual Report.

 Date: February 23, 2024

 /s/ EDWIN ROKS

 Edwin Roks

 Chief Executive Officer

 Date: February 23, 2024

 /s/ STEPHEN F. BLACKWOOD

 Stephen F. Blackwood

 Senior Vice President and Chief Financial Officer

 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

 To the Stockholders and the Board of Directors of Teledyne Technologies Incorporated
 Thousand Oaks, California
 Opinion on Internal Control over Financial Reporting
 We have audited the internal control over financial reporting of Teledyne Technologies Incorporated and subsidiaries (the "Company") as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.
 We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2023, of the Company and our report dated February 23, 2024, expressed an unqualified opinion on those financial statements.
 Basis for Opinion
 The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Report of Management on Teledyne Technologies Incorporated's Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
 We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
 Definition and Limitations of Internal Control over Financial Reporting
 A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
 Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

 /s/ Deloitte & Touche LLP
 Los Angeles, California

 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
 To the Stockholders and the Board of Directors of Teledyne Technologies Incorporated
 Thousand Oaks, California

 Opinion on the Financial Statements
 We have audited the accompanying consolidated balance sheets of Teledyne Technologies Incorporated and subsidiaries (the "Company") as of December 31, 2023 and January 1, 2023, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows, for each of the three years in the period ended December 31, 2023, and the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and January 1, 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America.
 We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 23, 2024, expressed an unqualified opinion on the Company's internal control over financial reporting.
 Basis for Opinion
 These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
 We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
 Critical Audit Matters
 The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.
 Goodwill – Refer to Notes 2, 4, and 6 to the financial statements
 Critical Audit Matter Description
 The Company's evaluation of goodwill for impairment involves the comparison of the fair value of each reporting unit to the respective carrying value. For goodwill impairment testing using the quantitative approach, the Company used a combination of the discounted cash flow approach and the market approach to estimate fair value of the FLIR reporting unit. The Company's goodwill balance was $8,002.8 million as of December 31, 2023, of which $5,874.6 million was allocated to the FLIR reporting unit. The application of the discounted cash flow model requires management to make significant estimates and assumptions related to projected revenues and the selected discount rate.
 Given the significant estimates and assumptions made by management to estimate the fair value of the FLIR reporting unit and the difference between the FLIR reporting unit's fair value and carrying value, performing audit procedures to evaluate the reasonableness of management's estimates and assumptions, specifically related to the projected revenues and selected discount rate, required a high degree of auditor judgment and an increased extent of effort, including the need to involve our fair value specialists
 How the Critical Audit Matter Was Addressed in the Audit
 Our audit procedures related to (1) revenue projections and (2) the selection of the discount rate used to estimate the fair value of the goodwill acquired included the following, among others:

 • We tested the effectiveness of management's controls over the revenue projections and discount rate assumptions used to estimate the fair value of the FLIR reporting unit.
 • We evaluated the reasonableness of the revenue projections by comparing them to (1) FLIR and third-party historical financial data, (2) current economic factors and analyst reports of the Company and companies in its peer group, (3) industry reports, (4) assumptions used by the Company in its budgeting process, and (5) order backlog.
 • We performed a sensitivity analysis by varying the projected revenue and selected discount rate assumptions.
 • With the assistance of our fair value specialists, we performed an analysis comparing applicable industry forecasted long-term revenue growth rates to management's projected revenues used within the valuation model.
 • With the assistance of our fair value specialists, we evaluated the reasonableness of the selected discount rate by developing a range of independent estimates and comparing those to the discount rate selected by management.
 Indefinite-Lived Trademarks – Refer to Notes 2, 4, and 6 to the financial statements
 Critical Audit Matter Description
 The Company's evaluation of indefinite-lived trademarks for impairment involves the comparison of the fair value of indefinite-lived trademark to the respective carrying value. For indefinite-lived trademark impairment testing using the quantitative approach, the Company estimated the fair value of its trademarks through the use of a relief from royalty approach based on its best estimate of amounts and timing of projected revenues and compared the estimated fair value to the carrying value of the corresponding trademark. The FLIR indefinite-lived trademark balance was $685.3 million as of December 31, 2023, which is a component of the Company's intangible assets balance of $2,278.1 million as of December 31, 2023. The application of the relief from royalty method requires management to make significant estimates and assumptions related to projected revenues, as well as the selected royalty rate and discount rate.
 Given the significant estimates and assumptions made by management to estimate the fair value of the FLIR indefinite-lived trademark and the difference between the FLIR indefinite-lived trademark's fair value and carrying value, performing audit procedures to evaluate the reasonableness of management's estimates and assumptions, specifically related to the projected revenues and the selected royalty rate and discount rate, required a high degree of auditor judgment and an increased extent of effort, including the need to involve our fair value specialists.
 How the Critical Audit Matter Was Addressed in the Audit
 Our audit procedures related to (1) revenue projections and (2) the selection of the discount rate used to estimate the fair value of the goodwill acquired included the following, among others:
 • We tested the effectiveness of management's controls over the revenue projections and the selected royalty rate and discount rate assumptions used to estimate the fair value of the FLIR indefinite-lived trademark.
 • We evaluated the reasonableness of the revenue projections by comparing them to (1) FLIR and third-party historical financial data, (2) current economic factors and analyst reports of the Company and companies in its peer group, (3) industry reports, (4) assumptions used by the Company in its budgeting process, and (5) order backlog.
 • We performed a sensitivity analysis by varying the projected revenues, the selected royalty rate, and discount rate assumptions.
 • With the assistance of our fair value specialists, we performed an analysis comparing applicable industry forecasted long-term revenue growth rates to management's projected revenues used within the valuation model.
 • With the assistance of our fair value specialists, we evaluated the reasonableness of the selected discount rate and royalty rate by developing a range of independent estimates and comparing those to the discount rate and royalty rate selected by management.

 /s/ Deloitte & Touche LLP
 Los Angeles, California

 We have served as the Company's auditor since 2015.

 TELEDYNE TECHNOLOGIES INCORPORATED
 CONSOLIDATED STATEMENTS OF INCOME
 (in millions, except per-share amounts)

 For the Fiscal Year

 2023
 2022
 2021

 $
 $
 $

 Costs and expenses

 3,196.1
 3,128.3
 2,772.9

 Selling, general and administrative
 1,208.3
 1,156.6
 1,067.8

 196.7
 201.7
 149.3

 Total costs and expenses
 4,601.1
 4,486.6
 3,990.0

 Operating income (loss)

 1,034.4
 972.0
 624.3

 Interest and debt expense, net
 ( 77.3)
 ( 89.3)
 ( 90.8)

 Non-service retirement benefit income
 12.4
 11.4
 11.2

 Gain (loss) on debt extinguishment
 1.6
 10.6
 ( 13.4)

 Other income (expense), net
 ( 12.2)
 3.4
 2.5

 Income (loss) before income taxes

 958.9
 908.1
 533.8

 Provision (benefit) for income taxes
 72.3
 119.2
 88.5

 Net income (loss) including noncontrolling interest

 886.6
 788.9
 445.3

 Less: Net income (loss) attributable to noncontrolling interest
 0.9
 0.3
 —

 Net income (loss) attributable to Teledyne
 $
 885.7
 $
 788.6
 $
 445.3

 Basic earnings per common share
 $
 18.80
 $
 16.85
 $
 10.31

 Weighted average common shares outstanding
 47.1
 46.8
 43.2

 Diluted earnings per common share
 $
 18.49
 $
 16.53
 $
 10.05

 Weighted average diluted common shares outstanding
 47.9
 47.7
 44.3

 TELEDYNE TECHNOLOGIES INCORPORATED
 CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

 For the Fiscal Year

 2023
 2022
 2021

 Net income (loss) including noncontrolling interest
 $
 886.6
 $
 788.9
 $
 445.3

 Other comprehensive income (loss):

 Foreign exchange translation adjustment
 79.6
 ( 343.3)
 ( 44.4)

 Hedge activity, net of tax
 6.9
 4.7
 ( 5.7)

 Pension and postretirement benefit adjustments, net of tax
 5.9
 42.1
 50.2

 Other comprehensive income (loss) (a)
 92.4
 ( 296.5)
 0.1

 Comprehensive income (loss) including noncontrolling interest
 979.0
 492.4
 445.4

 Less: Comprehensive income (loss) attributable to noncontrolling interest
 0.9
 0.3
 —

 Comprehensive income (loss) attributable to Teledyne
 $
 978.1
 $
 492.1
 $
 445.4

 (a) Net of income tax expense of $ 3.8 million in 2023, income tax expense of $ 25.0 million for 2022 and income tax expense of $ 11.7 million for 2021.

 TELEDYNE TECHNOLOGIES INCORPORATED
 CONSOLIDATED BALANCE SHEETS
 For the Fiscal Years Ended December 31, 2023 and January 1, 2023
 (in millions, except share amounts)
 2023
 2022

 Assets

 Current Assets

 Cash and cash equivalents
 $
 648.3
 $
 638.1

 Accounts receivable, net
 899.7
 883.7

 Unbilled receivables, net
 302.4
 274.7

 Inventories, net
 917.7
 890.7

 Prepaid expenses and other current assets
 213.3
 130.7

 Total Current Assets
 2,981.4
 2,817.9

 Property, plant and equipment, net

 777.0
 769.8

 Goodwill
 8,002.8
 7,873.0

 Acquired intangible assets, net
 2,278.1
 2,440.6

 Prepaid pension assets
 203.3
 178.4

 Other assets, net
 285.3
 274.3

 Total Assets
 $
 14,527.9
 $
 14,354.0

 Liabilities and Stockholders' Equity

 Current Liabilities

 Accounts payable
 $
 384.7
 $
 505.7

 781.3
 717.6

 Current portion of long-term debt and other debt
 600.1
 300.1

 Total Current Liabilities
 1,766.1
 1,523.4

 Long-term debt
 2,644.8
 3,620.5

 Long-term deferred tax liabilities
 415.4
 490.0

 Other long-term liabilities
 475.8
 547.2

 Total Liabilities
 5,302.1
 6,181.1

 Commitments and Contingencies

 Redeemable Noncontrolling Interest
 4.6
 3.7

 Stockholders' Equity

 Preferred stock, $ 0.01 par value; authorized 15,000,000 shares; outstanding shares- no ne

 —
 —

 Common stock, $ 0.01 par value; authorized 125,000,000 shares;
 Issued shares: 47,331,845 at December 31, 2023, and 47,194,766 at January 1, 2023; outstanding shares: 47,331,845 at December 31, 2023, and 46,912,635 at January 1, 2023

 0.5
 0.5

 Additional paid-in capital
 4,407.3
 4,353.4

 Retained earnings
 5,447.5
 4,561.8

 Treasury stock, — at December 31, 2023 and 282,131 at January 1, 2023

 —
 ( 20.0)

 Accumulated other comprehensive income (loss)
 ( 634.1)
 ( 726.5)

 Total Stockholders' Equity
 9,221.2
 8,169.2

 Total Liabilities and Stockholders' Equity
 $
 14,527.9
 $
 14,354.0

 TELEDYNE TECHNOLOGIES INCORPORATED
 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

 Common
 Stock
 Additional
 Paid-in
 Capital
 Retained
 Earnings
 Treasury
 Stock
 Accumulated Other Comprehensive
 Income (Loss)
 Total

 Balance, January 3, 2021
 $
 0.4
 $
 389.9
 $
 3,327.9
 $
 ( 59.5)
 $
 ( 430.1)
 $
 3,228.6

 Net income (loss)
 —
 —
 445.3
 —
 —
 445.3

 Other comprehensive income (loss), net of tax
 —
 —
 —
 —
 0.1
 0.1

 Common stock issued
 0.1
 3,888.6
 —
 —
 —
 3,888.7

 Treasury stock issued
 —
 ( 20.7)
 —
 20.7
 —
 —

 Stock-based compensation
 —
 33.9
 —
 —
 —
 33.9

 Exercise of stock options
 —
 25.4
 —
 —
 —
 25.4

 Balance, January 2, 2022
 0.5
 4,317.1
 3,773.2
 ( 38.8)
 ( 430.0)
 7,622.0

 Net income (loss)
 —
 —
 788.6
 —
 —
 788.6

 Other comprehensive income (loss), net of tax
 —
 —
 —
 —
 ( 296.5)
 ( 296.5)

 Treasury stock issued
 —
 ( 18.8)
 —
 18.8
 —
 —

 Stock-based compensation
 —
 31.5
 —
 —
 —
 31.5

 Exercise of stock options
 —
 23.6
 —
 —
 —
 23.6

 Balance, January 1, 2023
 0.5
 4,353.4
 4,561.8
 ( 20.0)
 ( 726.5)
 8,169.2

 Net income (loss)
 —
 —
 885.7
 —
 —
 885.7

 Other comprehensive income (loss), net of tax
 —
 —
 —
 —
 92.4
 92.4

 Treasury stock issued
 —
 ( 20.0)
 —
 20.0
 —
 —

 Stock-based compensation and other
 —
 28.5
 —
 —
 —
 28.5

 Exercise of stock options
 —
 45.4
 —
 —
 —
 45.4

 Balance, December 31, 2023
 $
 0.5
 $
 4,407.3
 $
 5,447.5
 $
 —
 $
 ( 634.1)
 $
 9,221.2

 TELEDYNE TECHNOLOGIES INCORPORATED AND SUBSIDIARIES
 CONSOLIDATED STATEMENTS OF CASH FLOWS

 For the Fiscal Year

 2023
 2022
 2021

 Operating Activities

 Net income (loss) including noncontrolling interest
 $
 886.6
 $
 788.9
 $
 445.3

 Adjustments to reconcile net income (loss) including noncontrolling interest to net cash provided by (used in) operating activities:

 Depreciation and amortization
 316.4
 332.2
 371.8

 Stock-based compensation
 32.3
 31.5
 33.9

 Bridge financing and debt extinguishment (income) expense
 ( 1.6)
 ( 10.6)
 30.5

 Changes in operating assets and liabilities, net of businesses acquired:

 Accounts receivable and unbilled receivables
 ( 21.7)
 ( 87.9)
 ( 158.9)

 Inventories
 ( 14.3)
 ( 155.2)
 7.0

 Prepaid expenses and other assets
 ( 42.6)
 ( 50.4)
 11.8

 Accounts payable
 ( 124.9)
 45.9
 99.1

 Accrued expenses and other liabilities
 49.7
 ( 344.2)
 ( 5.7)

 Deferred taxes and income taxes receivable (payable), net
 ( 230.9)
 ( 35.2)
 ( 21.4)

 Other, net
 ( 12.9)
 ( 28.2)
 11.2

 Net cash provided by (used in) operating activities
 836.1
 486.8
 824.6

 Investing Activities

 Purchases of property, plant and equipment
 ( 114.9)
 ( 92.6)
 ( 101.6)

 Purchase of businesses and other investments, net of cash acquired
 ( 77.7)
 ( 99.6)
 ( 3,723.3)

 Other, net
 2.3
 16.8
 0.6

 Net cash provided by (used in) investing activities
 ( 190.3)
 ( 175.4)
 ( 3,824.3)

 Financing Activities

 Net proceeds (repayments) from credit facility
 ( 125.0)
 —
 —

 Proceeds from issuance of term loans and senior notes, net
 —
 —
 3,975.9

 Payments on other debt
 ( 553.9)
 ( 174.8)
 ( 1,141.7)

 Liquidations (maturities) of cross currency swap
 ( 13.5)
 43.1
 —

 Proceeds from stock options exercised
 45.4
 23.6
 25.4

 Payments for bridge financing and debt extinguishment
 —
 —
 ( 30.5)

 Other, net
 ( 4.5)
 ( 1.9)
 ( 22.0)

 Net cash provided by (used in) financing activities
 ( 651.5)
 ( 110.0)
 2,807.1

 Effect of exchange rate changes on cash and cash equivalents
 15.9
 ( 38.0)
 ( 5.8)

 Change in cash and cash equivalents
 10.2
 163.4
 ( 198.4)

 Cash and cash equivalents—beginning of period
 638.1
 474.7
 673.1

 Cash and cash equivalents—end of period
 $
 648.3
 $
 638.1
 $
 474.7

 TELEDYNE TECHNOLOGIES INCORPORATED AND SUBSIDIARIES
 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

 Note 1. Description of Business
 Teledyne Technologies Incorporated ("Teledyne" or the "Company") provides enabling technologies for industrial growth markets that require advanced technology and high reliability. These markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research. Teledyne's products include digital imaging sensors, cameras and systems within the visible, infrared and X-ray spectra, monitoring and control instrumentation for marine and environmental applications, harsh environment interconnects, electronic test and measurement equipment, aircraft information management systems, and defense electronics and satellite communication subsystems. The Company also supply engineered systems for defense, space, environmental and energy applications. The Company differentiate itself from many of its direct competitors by having a customer- and Company-sponsored applied research center that augments its product development expertise. The Company believes that its technological capabilities, innovation and ability to invest in the development of new and enhanced products are critical to obtaining and maintaining leadership in the markets and industries in which it competes.
 The Company's businesses are aligned in four segments: Digital Imaging, Instrumentation, Aerospace and Defense Electronics and Engineered Systems.

 Note 2. Summary of Significant Accounting Policies
 Fiscal Year
 The Company operates on a 52- or 53-week fiscal year convention ending on the Sunday nearest to December 31. Fiscal year 2023 was a 52-week fiscal year and ended on December 31, 2023. Fiscal year 2022 was a 52-week fiscal year and ended on January 1, 2023. Fiscal year 2021 was a 52-week fiscal year and ended on January 2, 2022. References to the years 2023, 2022 and 2021 are intended to refer to the respective fiscal year unless otherwise noted.
 Principles of Consolidation
 The consolidated financial statements include the accounts of Teledyne and its majority-owned subsidiaries. Intercompany accounts and intercompany transactions have been eliminated.
 Business Acquisitions
 Business acquisitions are accounted for under the acquisition method by assigning the purchase price to tangible and intangible assets acquired and liabilities assumed. Assets acquired and liabilities assumed are recorded at their fair values and the excess of the purchase price over the amounts assigned is recorded as goodwill.
 Foreign Currency Translation
 The Company's foreign entities' accounts are generally measured using local currency as the functional currency. Assets and liabilities of these entities are translated at the exchange rate in effect at year-end. Revenues and expenses are translated at average month end rates of exchange prevailing during the year. Unrealized translation gains and losses arising from differences in exchange rates from period to period are included as a component of accumulated other comprehensive income (loss) ("AOCI").
 Use of Estimates
 The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to sales returns and allowances, allowance for doubtful accounts, inventories, goodwill, intangible assets, asset valuations, income taxes, warranty obligations, pension and other postretirement benefits, long-term contracts, environmental, workers' compensation and general liability, employee benefits and other contingencies and litigation. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances at the time, the results of which form the basis for making its judgments. Actual results may differ materially from these estimates under different assumptions or conditions. Management believes that the estimates used are reasonable.
 Cash and Cash Equivalents
 Cash and cash equivalents include cash on hand and highly liquid money-market mutual funds with maturities of three months or less when purchased.
 Accounts Receivable, Contract Assets and Contract Liabilities
 The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables

 (contract assets), and customer advances and deposits (contract liabilities). Under the typical payment terms of the Company's over time contracts, the customer pays the Company either performance-based payments or progress payments. Amounts billed and due from the Company's customers are classified as receivables on the consolidated balance sheets. The Company may receive interim payments as work progresses, although for some contracts, the Company may be entitled to receive an advance payment. The Company recognizes a liability for these interim and advance payments in excess of revenue recognized and present it as a contract liability. Contract liabilities typically are not considered a significant financing component because these cash advances are used to meet working capital demands that can be higher in the early stages of a contract, and these cash advances protect us from the other party failing to adequately complete some or all of its obligations under the contract. When revenue recognized exceeds the amount billed to the customer, the Company records an unbilled receivable (contract asset) for the amount entitled to be received based on an enforceable right to payment.
 The Company evaluates the collectability of its accounts receivable and contract assets based on a combination of factors, and judgment is required in the estimation process. If the Company becomes aware of a customer's inability to meet its financial obligations, a specific allowance is recorded to reduce the net receivable to the amount reasonably believed to be collectible from the customer. For all other customers, the Company uses an aging schedule and recognizes allowances for doubtful accounts based on the creditworthiness of the debtor, the age and status of outstanding receivables, the current business environment and historical collection experience adjusted for current expectations for the customers or industry. Accounts receivable are written off against the allowance for uncollectible accounts when the Company determines amounts are no longer collectible. Trade credit is extended based upon evaluations of each customer's ability to perform its obligations, which are updated periodically.
 Inventories
 Inventories are stated at the lower of cost or net realizable value and primarily valued on an average cost or first-in, first-out method. Inventory adjustments are recorded when inventory is considered to be excess or obsolete based upon an analysis of actual on-hand quantities on a part-level basis to forecasted product demand and historical usage.
 Property, Plant and Equipment
 Property, plant and equipment is stated at cost less accumulated depreciation and amortization. Depreciation and amortization are determined using a combination of accelerated and straight-line methods over the estimated useful lives of the various asset classes. Buildings and building improvements are depreciated over periods not exceeding 45 years, equipment over 5 to 18 years, computer hardware and software over 3 to 7 years and leasehold improvements over the shorter of the estimated remaining lives or lease terms. Significant improvements are capitalized while maintenance and repairs are charged to expense as incurred. Depreciation expense on property, plant and equipment was $ 119.1 million in 2023, $ 129.8 million in 2022 and $ 115.2 million in 2021.
 Goodwill, Acquired Intangible Assets and Other Long-Lived Assets
 Goodwill and acquired intangible assets with indefinite lives are not amortized but tested at least annually for impairment. The Company performs an annual impairment test for goodwill and other indefinite-lived intangible assets in the fourth quarter of each year, or more often as circumstances require. The Company uses qualitative and quantitative approaches when testing goodwill for impairment. For selected reporting units under the qualitative approach, the Company performs a qualitative evaluation of events and circumstances impacting the reporting unit to determine the likelihood of goodwill impairment. Based on that qualitative evaluation, if the Company determines it is more likely than not that the fair value of a reporting unit exceeds its carrying amount, no further evaluation is necessary. Otherwise, the Company performs a quantitative impairment test. A quantitative impairment test, if applicable, is used to identify potential goodwill impairment and then measure the amount of goodwill impairment loss, if any. The Company performs quantitative tests for reporting units at least once every three years. However, for certain reporting units the Company may perform a quantitative impairment test more frequently. The Company performed a quantitative impairment test for all of its reporting units in 2023.
 The Company reviews intangible and other long-lived assets subject to depreciation or amortization for impairment whenever events or circumstances indicate that the carrying value of the asset may not be recoverable. Acquired intangible assets with finite lives are amortized and reflected in the segment's operating income over their estimated useful lives. The Company assesses the recoverability of the carrying value of assets held for use based on a review of projected undiscounted cash flows. Impairment losses, where identified, are determined as the excess of the carrying value over the estimated fair value of the long-lived asset, and reflected in selling, general and administrative expense at the respective business segment.
 Pension and Postretirement Costs
 The Company's accounting for its defined benefit pension plans requires that amounts recognized in financial statements be determined on an actuarial basis, rather than as contributions are made to the plan. In consultation with actuaries, the Company determines the appropriate assumptions for use in determining the liability for future pension benefits. Net actuarial gains or losses are amortized to expense on a plan-by-plan basis when they exceed the accounting corridor. The accounting corridor is a defined range within which amortization of net gains and losses is not required and is equal to 10% of the greater of the market-related value of assets or benefit obligations. Gains or losses outside of the corridor are subject to amortization.

 Product Warranties
 Some of the Company's products are subject to standard warranties, and the Company reserves for the estimated cost of product warranties on a product-specific basis. Facts and circumstances related to a product warranty matter and cost estimates to return, repair and/or replace the product are considered when establishing a product warranty reserve. The adequacy of preexisting warranty reserves is assessed regularly, and the reserve is adjusted as necessary based on a review of historical warranty experience with respect to the applicable business or products, as well as the length and actual terms of the warranties, which are typically one year. The product warranty reserve is included in current accrued liabilities and long-term liabilities on the consolidated balance sheets.
 Environmental Liabilities
 Costs that mitigate or prevent future environmental contamination or extend the life, increase the capacity or improve the safety or efficiency of property utilized in current operations are capitalized. Other costs that relate to current operations or an existing condition caused by past operations are expensed in the period incurred. Environmental liabilities are recorded when the Company's liability is probable and the costs are reasonably estimable, which is generally not later than the completion of the feasibility study or the Company's recommendation of a remedy or commitment to an appropriate plan of action. The accruals are reviewed periodically and, as investigations and remediations proceed, adjustments are made as necessary. Accruals for losses from environmental remediation obligations do not consider the effects of inflation, and anticipated expenditures are not discounted to their present value. The accruals are not reduced by possible recoveries from insurance carriers or other third parties but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites and an assessment of the likelihood that such parties will fulfill their obligations at such sites. The measurement of environmental liabilities by the Company is based on currently available facts, present laws and regulations, and current technology. Such estimates take into consideration the Company's prior experience in site investigation and remediation, the data concerning cleanup costs available from other companies and regulatory authorities, and the professional judgment of the Company's environmental personnel in consultation with outside environmental specialists, when necessary.
 Revenue Recognition
 The Company determines the appropriate method by which it recognizes revenue by analyzing the nature of the products or services being provided as well as the terms and conditions of contracts or arrangements entered into with our customers. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. A contract's transaction price is allocated to each distinct good or service (i.e., performance obligation) identified in the contract, and each performance obligation is valued based on its estimated relative standalone selling price. For standard products or services, list prices generally represent the standalone selling price. For performance obligations where list price is not available, the Company typically uses the expected cost plus a margin approach to estimate the standalone selling price for that performance obligation. Approximately 70 % of revenue is recognized at a point in time, with the remaining 30 % recognized over time.
 Revenue recognized at a point in time relates primarily to the sale of standard or minimally customized products, with control transferring to the customer generally upon the transfer of title. This type of revenue arrangement is typical for our commercial contracts within the Digital Imaging, Instrumentation, and Aerospace and Defense Electronics segments. In limited circumstances, customer specified acceptance criteria exist. If the Company cannot objectively demonstrate that the product meets those specifications prior to the shipment, the revenue is deferred until customer acceptance is obtained. The transaction price in these arrangements can include variable consideration, such as product returns and sales allowances. The estimation of this variable consideration and determination of whether to include estimated amounts as a reduction in the transaction price is based largely on an assessment of anticipated performance and all information (historical, current and forecasted) that is reasonably available to the Company.
 Revenue recognized over time relates primarily to contracts to design, develop and/or manufacture highly engineered products used in both defense and commercial applications. This type of revenue arrangement is typical of the Company's U.S. Government contracts and to a lesser extent for certain commercial contracts, with both contract types occurring across all segments. The customer typically controls the work in process as evidenced either by contractual termination clauses or by a right to payment for costs incurred to date plus a reasonable profit for products or services that do not have an alternative use. As control transfers continuously over time on these contracts, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company generally uses the cost-to-cost measure of progress as this measure best depicts the transfer of control to the customer which occurs as the Company incurs costs on contracts. Under the cost-to-cost method, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. The transaction price in these arrangements may include estimated amounts of variable consideration, including award fees, incentive fees, contract amounts not yet funded, or other provisions that can either increase or decrease the transaction price. The Company estimates variable

 consideration at the amount to which it expects to be entitled, and the Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the estimation uncertainty is resolved. The estimation of this variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the anticipated performance and all information (historical, current and forecasted) that is reasonably available to us.
 The majority of the Company's over time contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and, therefore, not distinct. Over time contracts are often modified to account for changes in contract specifications and requirements. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the contract modifications on the Company's over time contracts are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis.
 For over time contracts using the cost-to-cost method, the Company has an Estimate at Completion ("EAC") process in which management reviews the progress and execution of our performance obligations. This EAC process requires management judgment relative to assessing risks, estimating contract revenue, determining reasonably dependable cost estimates, and making assumptions for schedule and technical issues. Since certain contracts extend over a longer period of time, the impact of revisions in cost and revenue estimates during the progress of work may adjust the current period earnings through a cumulative catch-up basis. This method recognizes, in the current period, the cumulative effect of the changes on current and prior quarters. Additionally, if the current contract estimate indicates a loss, a provision is made for the total anticipated loss in the period that it becomes evident. Contract cost and revenue estimates for significant contracts are generally reviewed and reassessed quarterly. The majority of revenue recognized over time uses an EAC process. The net aggregate effects of these changes in estimates on contracts accounted for under the cost-to-cost method in 2023 and 2022 was approximately $ 3.7 million of favorable operating income and $ 29.9 million of favorable operating income, respectively. The 2022 amount related to favorable changes in estimates that impacted revenue, and, to a lesser degree, cost of sales within the Digital Imaging operating segment. None of the effects of changes in estimates on any individual contract were material to the consolidated statements of income for any period presented.
 While extended or non-customary warranties do not represent a significant portion of the Company's revenue, the Company recognizes warranty services as a separate performance obligation when it is material to the contract. When extended or non-customary warranties represents a separate performance obligation, the revenue is deferred and recognized ratably over the extended warranty period.
 The Company recognizes the incremental costs of obtaining or fulfilling a contract as expense when incurred if the amortization period of the asset is one year or less. Incremental costs to obtain or fulfill contracts with an amortization period greater than one year were not material.
 Shipping and Handling
 Shipping and handling fees reimbursed by customers are classified as revenue while shipping and handling costs incurred by the Company are classified as cost of sales in the accompanying consolidated statements of income.
 Research and Development and Bid and Proposal Costs
 Selling, general and administrative expenses include research and development and bid and proposal costs which are expensed as incurred and were $ 365.8 million in 2023, $ 360.6 million in 2022 and $ 299.3 million in 2021. The 2021 amount includes a partial year of Teledyne FLIR research and development costs due to the timing of the acquisition.
 Leases
 The Company determines if an arrangement is a lease at inception. Operating leases are recorded as right-of-use assets in noncurrent other assets, net and the related lease liabilities in accrued liabilities and other long-term liabilities. The Company does not have material finance leases or subleases.
 Operating lease right-of-use assets represent a right to use an underlying asset for the lease term and lease liabilities represent an obligation to make lease payments arising from the lease. Operating lease right-of-use assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term and use an implicit rate when readily available. Since most of the Company's leases do not provide an implicit rate, the Company uses the incremental borrowing rate to determine the present value of lease payments. The rate will take into consideration the underlying asset's economic environment, including the length of the lease term and currency that the lease is payable in. The Company's lease agreements may include options to extend or early terminate the lease term at either a fixed cost, fixed increase or market value adjustment. The Company evaluates the likelihood of exercising each renewal option based on many factors, including the length of the renewal option and the future new lease cost, if known, or the estimated future new lease cost if it is not a fixed amount and will include those renewal options that are reasonably certain to be exercised for purposes of calculating the lease

 liability and corresponding right-of-use asset. Lease expense for operating leases is recognized on a straight-line basis over the lease term.
 Stock Incentive Plans
 Teledyne has long-term incentive plans which provide its Board of Directors the flexibility to grant restricted stock, restricted stock units, non-qualified stock options, incentive stock options and stock appreciation rights to officers and employees of Teledyne. During 2023, 2022 and 2021, the Company has granted time-based stock options, time-based restricted stock unit awards, and performance-based restricted stock unit awards. Employee stock options become exercisable in one-third increments on the first, second and third anniversary of the grant and have a maximum 10-year life. Employee time-based restricted stock units vest in one-third increments on the first, second and third anniversary of the grant. Performance-based restricted stock awards granted during 2023, 2022 and 2021 may be earned based upon a time-based component and the performance of the Company's return to stockholders over a three-year period.
 In 2021, the Company discontinued the Performance Share Plan ("PSP"), with an immaterial amount of compensation expense recorded in 2023 and 2022. Teledyne's PSP provided grants of performance share units, which key officers and executives could earn if Teledyne met specified performance objectives over a three-year period. Awards were payable in cash and to the extent available, shares of Teledyne common stock.
 Stock-based Compensation Costs
 The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock and restricted stock units (RSUs). The fair value of share-based compensation is determined at the grant date and the recognition of the related expense is generally recorded over the period in which the share-based compensation vests. Since 2019, stock options granted to our Executive Chairman are expensed immediately, as stock options continue to vest after retirement. The Company issues shares of common stock upon the exercise of stock options.
 The fair value of stock options granted through 2022 was determined by using a lattice-based option pricing model, and the Company did not grant stock options in 2023. In recent years, the Company began granting stock options to a smaller group of employees, as the Company began granting restricted stock units to a larger group of employees. In 2024, the Company began using the Black-Scholes option pricing model to determine the fair value of stock options. The Company uses a combination of its historical stock price volatility and the volatility of exchange traded options, if any, on the Company stock to compute the expected volatility for purposes of valuing stock options granted. The period used for the historical stock price corresponded to the expected term of the options. The period used for the exchange traded options, if any, included the longest-dated options publicly available, generally three months. The expected dividend yield is based on Teledyne's practice of not paying dividends. The risk-free rate of return is based on the yield of U.S. Treasury Strips with terms equal to the expected life of the options as of the grant date. The expected life in years is based on historical actual stock option exercise experience.
 Treasury Stock
 In January 2016, the Company's Board of Directors authorized a stock repurchase program authorizing the Company to repurchase up to 3,000,000 shares of its common stock. The number of shares that the Company may repurchase will depend on a variety of factors, such as share price, levels of cash and borrowing capacity available, alternative investment opportunities available immediately or longer-term, and other regulatory, market or economic conditions. Although the Company has no current plans to repurchase stock, future repurchases, if any, are expected to be funded with cash on hand and borrowings under the Company's credit facility. No repurchases were made since 2015.
 Preferred Stock
 Authorized preferred stock may be issued with designations, powers and preferences designated by the Board of Directors. There were no shares of preferred stock issued or outstanding in 2023, 2022 or 2021.
 Redeemable Noncontrolling Interest
 The minority ownership interest in shares of NL Acoustics is classified as a redeemable noncontrolling interest on the consolidated balance sheets due to a put option under which the minority owners may require the Company to purchase the remaining ownership interest, with the put option exercisable beginning in the third quarter of 2025. The redeemable noncontrolling interest is measured at the greater of the amount that would be paid if settlement occurred as of the balance sheet date based on the contractually defined redemption value and its carrying amount adjusted for net income (loss) attributable to the noncontrolling interest. Adjustments to the carrying value of the redeemable noncontrolling interest are recorded through retained earnings. Changes in the redeemable noncontrolling interest balance during the period were not material.
 Income Taxes
 The Company is subject to income taxes in the Unites States and numerous foreign jurisdictions. The provision for income taxes is computed using the asset and liability method, under which deferred tax assets and liabilities are recognized for temporary differences between the tax basis of assets and liabilities and their reported amount in the financial statements, which will result in taxable or deductible amounts in the future. In evaluating the Company's ability to recover its deferred tax assets within the jurisdiction from which they arise, the Company considers all available positive and negative evidence, including

 scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, the Company begins with historical results adjusted for the results of discontinued operations and incorporate assumptions about the amount of future state, federal and foreign pretax operating income adjusted for items that do not have tax consequences. The assumptions about future taxable income require significant judgment and are consistent with the plans and estimates the Company is using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, the Company considers three years of cumulative operating income. A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized.
 Income tax positions must meet a more-likely-than-not recognition in order to be recognized in the financial statements. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits as income tax expense. As new information becomes available, the assessment of the recognition threshold and the measurement of the associated tax benefit of uncertain tax positions may result in financial statement recognition or derecognition.
 Earnings Per Common Share
 Basic and diluted earnings per common share are computed based on net income (loss) attributable to Teledyne. The weighted average number of common shares outstanding during the period is used in the calculation of basic earnings per share. This number of shares is increased by contingent shares that could be issued under various compensation plans as well as by the dilutive effect of stock options based on the treasury stock method in the calculation of diluted earnings per common share.
 Derivative Instruments and Hedging Activities
 Teledyne transacts business in various foreign currencies and has international sales and expenses denominated in foreign currencies, subjecting the Company to foreign currency risk. The Company's primary foreign currency risk objective is to protect the U.S. dollar value of future cash flows and minimize the volatility of reported earnings. The Company's foreign currency objective is achieved through the following:
 • The Company utilizes foreign currency forward contracts to reduce the volatility of cash flows primarily related to forecasted revenue and expenses denominated in Canadian dollars for our Canadian companies, and in British pounds for our U.K. companies. These contracts are designated and qualify as cash flow hedges.
 • The Company has converted a U.S. dollar denominated, variable rate and fixed rate debt obligation of a European subsidiary, into euro fixed rate obligation using a receive float, pay fixed cross currency swap, and a receive fixed, pay fixed cross currency swap. This cross currency swap is designated as a cash flow hedge.
 • The Company utilizes foreign currency forward contracts to mitigate foreign exchange rate risk associated with foreign currency denominated monetary assets and liabilities, including intercompany receivables and payables.
 The effectiveness of the cash flow hedge forward contracts is assessed prospectively and retrospectively on a monthly basis using regression analysis, as well as using other timing and probability criteria. To receive hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedges and must be highly effective in offsetting changes to future cash flows on hedged transactions. The effective portion of the cash flow hedge contracts' gains or losses resulting from changes in the fair value of these hedges is initially reported, net of tax, as a component of AOCI in stockholders' equity until the underlying hedged item is reflected in our consolidated statements of income, at which time the effective amount in AOCI is reclassified to revenue in our consolidated statements of income.
 In the event that the underlying forecasted transactions do not occur, or it becomes remote that they will occur, within the defined hedge period, the gains or losses on the related cash flow hedges will be reclassified from AOCI to other income and expense. During the current reporting period, all forecasted transactions occurred and, therefore, there were no such gains or losses reclassified to other income and expense, due to missed forecasts.
 Fair Value Measurements
 Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The Company considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The fair value hierarchy comprises three levels. Level 1 relates to quoted prices in active markets for identical assets or liabilities. Level 2 relates to observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 are unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.
 To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy; for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement is disclosed is determined based on the lowest level input that is significant to the fair value measurement.

 Related Party Transactions
 For all periods presented, the Company had no material related party transactions that required disclosure.
 Recent Accounting Standards
 In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This standard requires a public entity to disclose significant segment expenses and other segment items on an interim and annual basis. Additionally, it requires a public entity to disclose the title and position of the Chief Operating Decision Maker ("CODM"). The new standard is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. A public entity should apply the amendments in this ASU retrospectively to all prior periods presented in the financial statements. The Company is evaluating the impact of adopting this guidance on its consolidated financial statements.
 In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to provide disclosure of specific categories in the rate reconciliation, as well as disclosure of income taxes paid disaggregated by jurisdiction focuses on the rate reconciliation and income taxes paid. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The Company is evaluating the impact of adopting this guidance on its consolidated financial statements.
 Other ASU's issued but not effective until after December 31, 2023 are not expected to have a material effect on the Company's consolidated financial position, annual results of operations and/or cash flows.

 Note 3. Business Acquisitions
 2023 Acquisitions
 Xena Networks
 During the fourth quarter of 2023, the Company acquired Xena Networks ApS and affiliates ("Xena Networks") for $ 24.2 million in cash, net of cash acquired, and subject to certain adjustments. Xena Networks, headquartered in Denmark, is a leading provider of high-speed terabit ethernet validation, quality assurance, and production test solutions. Xena Networks is part of the test and measurement instrumentation product line within the Instrumentation segment. Goodwill resulting from the Xena Networks acquisition will not be deductible for tax purposes.
 ChartWorld
 During the first quarter of 2023, the Company acquired ChartWorld International Limited and affiliates ("ChartWorld") for $ 53.5 million in cash, net of cash acquired, and subject to certain adjustments. ChartWorld, headquartered in Cyprus, with additional locations in Germany, Singapore, Canada and Japan, is a provider of digital marine navigation hardware and software provided through an affordable subscription-based model. ChartWorld is part of the Digital Imaging segment. Goodwill resulting from the ChartWorld acquisition will not be deductible for tax purposes.
 2022 Acquisitions
 ETM
 During the fourth quarter of 2022, Teledyne acquired ETM-Electromatic, Inc. ("ETM") for $ 87.7 million in cash, net of cash acquired, and subject to certain adjustments. ETM, headquartered in Newark, California, designs and manufactures high-power microwave and high-energy X-ray subsystems for cancer radiotherapy, defense and X-ray security applications. ETM is part of the Digital Imaging segment. Goodwill resulting from the ETM acquisition will not be deductible for tax purposes.
 NL Acoustics
 During the third quarter of 2022, the Company acquired an approximate 80 % majority interest in Noiseless Acoustics Oy ("NL Acoustics"), paying $ 11.9 million in cash, net of cash acquired, during the year. NL Acoustics, located in Helsinki, Finland, designs and manufactures acoustics imaging instruments and predictive maintenance solutions. NL Acoustics is part of the Digital Imaging segment. Goodwill resulting from the NL Acoustics acquisition will not be deductible for tax purposes.
 2021 Acquisition
 On May 14, 2021, Teledyne acquired the outstanding stock of FLIR Systems, Inc. ("FLIR") for approximately $ 8.1 billion. Further information about this acquisition can be found in Note 3 in the Company's Annual Report on Form 10-K for the year ended January 1, 2023. The results of this acquisition have been included in Teledyne's results since the date of acquisition.

 The following tables show the purchase price (net of cash acquired), goodwill acquired, and acquired intangible assets for the acquisitions made in 2023 and 2022 (in millions):

 2023

 Acquisitions
 Acquisition Date
 Cash Paid (a)
 Goodwill Acquired
 Acquired Intangible Assets

 Xena Networks
 October 13, 2023
 $
 24.2
 $
 21.1
 $
 4.8

 ChartWorld

 January 3, 2023
 53.5
 55.5
 11.3

 Total
 $
 77.7
 $
 76.6
 $
 16.1

 (a) Net of cash acquired

 2022

 Acquisitions
 Acquisition Date
 Cash Paid (a)
 Goodwill Acquired
 Acquired Intangible Assets

 ETM
 October 28, 2022
 $
 87.7
 $
 33.5
 $
 20.9

 NL Acoustics (acquisition of 80 % interest)

 July 15, 2022
 11.9
 11.7
 3.8

 Total
 $
 99.6
 $
 45.2
 $
 24.7

 (a) Net of cash acquired

 The Company's cost to acquire these 2023 and 2022 acquisitions was allocated to the assets acquired and liabilities assumed based upon their respective fair values as of the date of the completion of the acquisition. The differences between the fair value of the consideration paid and the estimated fair value of the assets and liabilities acquired was recorded as goodwill. The fair value of the acquired identifiable assets and liabilities for the Xena Networks acquisition is provisional pending finalization of the Company's acquisition accounting, including the measurement of tax basis in certain jurisdictions and the resulting deferred taxes that might arise from book and tax basis differences, if any. Pro forma results of operations, the revenue and net income subsequent to the acquisition date, and a more detailed breakout of the major classes of assets and liabilities acquired for the 2023 and 2022 acquisitions have not been presented because the effects of these acquisitions, individually and in the aggregate, were not material to the Company's financial results. The significant factors that resulted in recognition of goodwill for the 2023 and 2022 acquisitions included the acquired businesses' market positions, growth opportunities in the markets in which they operate, their experienced work force and established operating infrastructures. The results of these acquisitions have been included in Teledyne's results since the dates of their respective acquisition.

 Note 4. Business Segments
 Teledyne's businesses are aligned in four reportable segments: Digital Imaging, Instrumentation, Aerospace and Defense Electronics and Engineered Systems. The Company manages, evaluates and aggregates its operating segments for segment reporting purposes primarily on the basis of product and service type, production process, distribution methods, type of customer, management organization, sales growth potential and long-term profitability. The Digital Imaging segment includes high-performance sensors, cameras and systems, within the visible, infrared and X-ray spectra for use in industrial, government and medical applications, as well as MEMS and high-performance, high-reliability semiconductors including analog-to-digital and digital-to-analog converters. It also includes the customer- and Company-sponsored applied research center which benefits government programs and commercial businesses. The Instrumentation segment provides monitoring and control instruments for marine, environmental, industrial and other applications, electronic test and measurement equipment and harsh environment interconnect products. The Aerospace and Defense Electronics segment provides sophisticated electronic components and subsystems and communications products, including defense electronics, harsh environment interconnects, data acquisition and communications equipment for aircraft and components and subsystems for wireless and satellite communications, as well as general aviation batteries. The Engineered Systems segment provides innovative systems engineering and integration, advanced technology application, software development and manufacturing solutions for defense, space, environmental and energy applications.
 Business segment results include net sales and operating income by segment but excludes corporate office expenses. Corporate expense primarily includes various administrative expenses relating to the corporate office not allocated to our segments.

 Information on the Company's business segments was as follows (in millions):

 Net sales (a):
 2023
 2022
 2021

 $
 $
 $
 2,412.9

 1,166.9

 726.5
 682.4
 628.7

 438.7
 411.3
 405.8

 Total net sales
 $
 $
 $

 Operating income (loss):
 2023
 2022
 2021

 $
 517.4
 $
 519.3
 $
 325.6

 338.3
 295.3
 253.7

 199.6
 184.1
 133.2

 44.7
 39.2
 48.6

 Corporate expense
 ( 65.6)
 ( 65.9)
 ( 136.8)

 Total operating income (loss)
 $
 1,034.4
 $
 972.0
 $
 624.3

 (a) Net sales excludes inter-segment sales of $ 29.4 million, $ 25.3 million and $ 20.2 million for fiscal years 2023, 2022 and 2021, respectively.

 Depreciation and amortization (in millions):
 2023
 2022
 2021

 Digital Imaging (a)
 $
 268.9
 $
 279.0
 $
 309.2

 27.7
 32.6
 38.1

 11.5
 12.4
 13.2

 4.4
 4.4
 7.2

 Corporate
 3.9
 3.8
 4.1

 Total depreciation and amortization
 $
 316.4
 $
 332.2
 $
 371.8

 (a) The fiscal year 2023 and 2022 amounts included $ 164.0 million and $ 167.6 million of acquired asset intangible amortization related to FLIR. The fiscal year 2021 amount included $ 106.4 million of acquired inventory step-up expense and $ 110.3 million of acquired asset intangible amortization related to FLIR.

 Capital expenditures (in millions):
 2023
 2022
 2021

 $
 78.2
 $
 63.9
 $
 64.2

 14.0
 9.3
 13.3

 10.9
 8.0
 8.4

 3.4
 5.3
 12.9

 Corporate
 8.4
 6.1
 2.8

 Total capital expenditures
 $
 114.9
 $
 92.6
 $
 101.6

 Identifiable assets are those assets used in the operations of the segments. Corporate assets primarily consist of cash and cash equivalents, deferred taxes, pension assets and other assets.
 Identifiable assets (in millions):
 2023
 2022
 2021

 $
 11,382.2
 $
 11,432.3
 $
 11,756.8

 1,692.3
 1,626.4
 1,640.3

 569.1
 540.1
 536.3

 184.8
 200.3
 179.2

 Corporate
 699.5
 554.9
 317.7

 Total identifiable assets
 $
 14,527.9
 $
 14,354.0
 $
 14,430.3

 Net sales by geographic region (in millions):
 2023
 2022
 2021

 $
 2,895.4
 $
 2,872.6
 $
 2,466.4

 Europe
 1,332.7
 1,157.3
 958.5

 Asia
 946.8
 971.5
 807.9

 All other regions
 460.6
 457.2
 381.5

 Total net sales
 $
 $
 $

 Long-lived assets (in millions):
 2023
 2022
 2021

 $
 7,798.0
 $
 7,873.1
 $
 9,446.3

 Canada
 1,174.0
 1,169.7
 763.5

 United Kingdom
 852.8
 825.8
 622.4

 France
 434.0
 427.4
 463.7

 All other countries
 1,275.2
 1,225.4
 679.3

 Total long-lived assets
 $
 11,534.0
 $
 11,521.4
 $ 11,975.2

 Long-lived assets consist of property, plant and equipment, goodwill, acquired intangible assets, prepaid pension assets and other long-term assets including deferred compensation assets but excluding any deferred tax assets. In 2021, provisional amounts for goodwill and intangible assets were primarily included in the United States as the FLIR acquisition was provisional at that time. The all other countries category primarily consists of Teledyne's other operations in Europe, primarily in Sweden, Norway, Belgium and Estonia.
 Product Lines
 The Instrumentation segment includes three product lines: Marine Instrumentation, Environmental Instrumentation and Test and Measurement Instrumentation. All other segments each contain one product line.
 The tables below provide a summary of the net sales by product line for the Instrumentation segment (in millions):

 Instrumentation:
 2023
 2022
 2021

 Marine Instrumentation
 $
 529.7
 $
 460.7
 $
 424.1

 Environmental Instrumentation
 458.1
 465.0
 446.3

 Test and Measurement Instrumentation
 338.4
 328.3
 296.5

 Total
 $
 $
 $
 1,166.9

 Severance and Facility Consolidation Costs
 As part of a continuing effort to reduce costs and improve operating performance, the Company may take and has taken actions to consolidate and relocate certain facilities and reduce headcount across various businesses, reducing its exposure to weaker end markets. For 2023, 2022 and 2021, the Company recorded $ 12.0 million of costs, $ 0.5 million of benefits and $ 26.4 million of costs, respectively, related to these actions, with the majority of the costs included within selling, general and administrative expense and within the Digital Imaging segment. At December 31, 2023, $ 2.9 million remains to be paid related to actions taken in 2023. In 2022, the Company, recorded a net benefit of $ 0.5 million, which related to $ 3.5 million of costs related to headcount or facility consolidation costs, partially offset by $ 4.0 million of income related to the favorable resolution of a facility consolidation charge within the Digital Imaging segment.

 Note 5. Revenue Recognition and Contract Balances
 The Company disaggregates its revenue from contracts with customers by customer type and geographic region for each of our segments, as the Company believes it best depicts how the nature, amount, timing and uncertainty of its revenue and cash flows are affected by economic factors. With the exception of the Engineered Systems segment, net sales in each of our segments is primarily derived from fixed-price contracts. Net sales in the Engineered Systems segment are typically between 45 % and 55 % fixed-price contracts in a given reporting period, with the balance of net sales related to cost-reimbursable type contracts. For 2023, 2022 and 2021, approximately 49 %, 49 %, and 47 % of net sales in the Engineered Systems segment was derived from fixed-price contracts.

 Customer Type
 Geographic Region (c)

 U.S. Govt. (a)
 Other (b)
 Total
 Europe
 Asia
 All other
 Total

 Net sales:

 $
 570.7
 $
 2,573.4
 $
 $
 1,406.9
 $
 808.7
 $
 622.9
 $
 305.6
 $

 95.9
 1,230.3
 566.2
 386.8
 253.0
 120.2

 330.3
 396.2
 726.5
 492.0
 137.2
 67.1
 30.2
 726.5

 384.8
 53.9
 438.7
 430.3
 —
 3.8
 4.6
 438.7

 Total
 $
 1,381.7
 $
 4,253.8
 $
 $
 2,895.4
 $
 1,332.7
 $
 946.8
 $
 460.6
 $

 (a) U.S. Government sales include sales as a prime contractor or subcontractor.
 (b) Primarily commercial sales
 (c) Geographic region by destination

January 1, 2023
January 1, 2023

 Customer Type
 Geographic Region (c)

 U.S. Govt. (a)
 Other (b)
 Total
 Europe
 Asia
 All other
 Total

 Net sales:

 $
 619.1
 $
 2,491.8
 $
 $
 1,416.6
 $
 749.7
 $
 637.8
 $
 306.8
 $

 108.1
 1,145.9
 554.5
 311.5
 267.1
 120.9

 266.3
 416.1
 682.4
 494.6
 96.1
 65.3
 26.4
 682.4

 366.4
 44.9
 411.3
 406.9
 —
 1.3
 3.1
 411.3

 Total
 $
 1,359.9
 $
 4,098.7
 $
 $
 2,872.6
 $
 1,157.3
 $
 971.5
 $
 457.2
 $

 (a) U.S. Government sale include sales as a prime contractor or subcontractor.
 (b) Primarily commercial sales
 (c) Geographic region by destination

January 2, 2022
January 2, 2022

 Customer Type
 Geographic Region (c)

 U.S. Govt. (a)
 Other (b)
 Total
 Europe
 Asia
 All other
 Total

 Net sales:

 $
 515.9
 $
 1,897.0
 $
 2,412.9
 $
 1,082.6
 $
 567.8
 $
 510.3
 $
 252.2
 $
 2,412.9

 91.6
 1,075.3
 1,166.9
 512.6
 298.5
 247.5
 108.3
 1,166.9

 227.2
 401.5
 628.7
 469.0
 92.1
 48.6
 19.0
 628.7

 358.4
 47.4
 405.8
 402.2
 0.1
 1.5
 2.0
 405.8

 Total
 $
 1,193.1
 $
 3,421.2
 $
 $
 2,466.4
 $
 958.5
 $
 807.9
 $
 381.5
 $

 (a) U.S. Government sales include sales as a prime contractor or subcontractor.
 (b) Primarily commercial sales
 (c) Geographic region by destination

 Remaining performance obligations represent the transaction price of firm orders for which work has not been performed as of the period end date and excludes unexercised contract options and potential orders under ordering-type contracts (e.g., indefinite-delivery, indefinite-quantity). As of December 31, 2023, the aggregate amount of the transaction price allocated to remaining performance obligations was $ 3,141.7 million. The Company expects approximately 77 % of remaining performance obligations to be recognized into revenue within the next twelve months, with the remaining 23 % recognized thereafter.
 The unbilled receivable balance increased from the beginning of the year by $ 27.7 million, or 10.1 %, primarily due to recognizing revenue ahead of achieving billing milestones on certain contracts within the Engineered Systems segment. Contract liabilities increased from the beginning of the year by $ 58.8 million or 28.3 %, primarily due to an increase in customer advances in the Aerospace and Defense Electronics segment and the Instrumentation segment. The Company recognized revenue of $ 138.9 million during the year ended December 31, 2023 from contract liabilities that existed at the beginning of year.

 Note 6. Goodwill and Intangible Assets

 Goodwill (in millions):

 Total

 Balance at January 3, 2022
 $
 6,867.5
 $
 935.9
 $
 165.7
 $
 17.6
 $
 7,986.7

 Current year acquisitions
 78.5
 —
 —
 —
 78.5

 Foreign currency changes and other
 ( 165.6)
 ( 22.7)
 ( 3.9)
 —
 ( 192.2)

 Balance at January 1, 2023
 6,780.4
 913.2
 161.8
 17.6
 7,873.0

 Current year acquisitions
 55.5
 21.1
 —
 —
 76.6

 Foreign currency changes and other
 41.1
 10.5
 1.6
 —
 53.2

 Balance at December 31, 2023
 $
 6,877.0
 $
 944.8
 $
 163.4
 $
 17.6
 $
 8,002.8

 In the fourth quarter of 2023, the Company performed a quantitative test for all reporting units. The results of our annual impairment tests of goodwill indicated that no impairment existed in 2023, 2022 or 2021.

 2023

 2022

 Gross carrying amount
 Accumulated amortization
 Net carrying amount
 Gross carrying amount
 Accumulated amortization
 Net carrying amount

 Acquired intangible assets (in millions):

 Proprietary technology
 $
 1,696.6
 $
 663.0
 $
 1,033.6
 $
 1,667.7
 $
 497.4
 $
 1,170.3

 Customer list/relationships
 609.5
 219.4
 390.1
 596.1
 177.0
 419.1

 Patents
 0.6
 0.6
 —
 0.6
 0.6
 —

 Non-compete agreements
 0.9
 0.9
 —
 0.9
 0.9
 —

 Definite-lived trademarks
 10.2
 5.8
 4.4
 7.1
 4.4
 2.7

 Backlog
 16.4
 16.4
 —
 16.1
 15.8
 0.3

 Acquired intangible assets subject to amortization
 2,334.2
 906.1
 1,428.1
 2,288.5
 696.1
 1,592.4

 Acquired intangible assets not subject to amortization:

 Indefinite-lived trademarks
 850.0
 —
 850.0
 848.2
 —
 848.2

 Total acquired intangible assets
 $
 3,184.2
 $
 906.1
 $
 2,278.1
 $
 3,136.7
 $
 696.1
 $
 2,440.6

 Amortizable acquired intangible assets are amortized on a straight-line basis over their estimated useful lives ranging from one to 15 years. Consistent with Teledyne's growth strategy, the Company seeks to acquire companies in markets characterized by high barriers to entry and that include specialized products not likely to be commoditized. Given our markets and highly engineered nature of our products, the rates of new technology development and customer acquisition and/or attrition are often not volatile. As such, Teledyne believes the value of acquired intangible assets decline in a linear, as opposed to an accelerated fashion, and the Company believes amortization on a straight-line basis is appropriate. Recorded impairment charges to intangible assets were not material in 2023, 2022 or 2021. The expected future amortization expense for the next five years is as follows (in millions): 2024 - $ 198.9; 2025 - $ 193.3; 2026 - $ 190.6; 2027 - $ 183.8; 2028 - $ 181.5.
 The estimated remaining useful lives by asset category as of December 31, 2023, are as follows:
 Acquired intangibles subject to amortization

 Weighted average remaining useful life in years

 Proprietary technology
 6.6

 Customer list/relationships
 9.8

 Trademarks
 3.0

 Total acquired intangibles subject to amortization
 7.2

 Note 7. Supplemental Balance Sheet Information
 Accounts Receivable and Unbilled Receivables (in millions):

 2023
 2022

 Commercial and other billed receivables
 $
 760.9
 $
 763.1

 U.S. Government and prime contractors billed receivables
 150.3
 132.3

 911.2
 895.4

 Allowance for doubtful accounts
 ( 11.5)
 ( 11.7)

 Account receivable, net
 $
 899.7
 $
 883.7

 Commercial and other unbilled receivables, net
 $
 156.7
 $
 148.3

 U.S. Government and prime contractors unbilled receivables, net
 145.7
 126.4

 Unbilled receivables, net
 $
 302.4
 $
 274.7

 Inventories (in millions):

 2023
 2022

 Raw materials and supplies
 $
 560.6
 $
 563.7

 Work in process
 184.8
 156.8

 Finished goods
 172.3
 170.2

 Total inventories, net
 $
 917.7
 $
 890.7

 Property, plant and equipment (in millions):

 2023
 2022

 Land

 $
 107.4
 $
 103.6

 Buildings

 450.9
 436.4

 Equipment and software and other

 1,165.8
 1,077.6

 1,724.1
 1,617.6

 Accumulated depreciation and amortization

 ( 947.1)
 ( 847.8)

 Total property, plant and equipment, net

 $
 777.0
 $
 769.8

 Accrued liabilities (in millions):

 2023
 2022

 Contract liabilities

 $
 241.1
 $
 187.6

 Compensation, benefit and other employee related accruals
 204.6
 205.1

 Warranty reserve
 40.5
 43.3

 Operating lease liabilities
 30.1
 29.4

 Derivative liabilities
 27.4
 27.8

 Other

 237.6
 224.4

 Total accrued liabilities

 $
 781.3
 $
 717.6

 Other long-term liabilities (in millions):

 2023
 2022

 Operating lease liabilities

 $
 123.4
 $
 125.9

 Unrecognized tax benefits, including accrued interest and penalties

 104.5
 176.3

 Deferred compensation liabilities
 102.2
 92.2

 Pension and postretirement related liabilities
 57.8
 50.2

 Contract liabilities
 25.5
 20.2

 Derivative liabilities
 —
 19.4

 Warranty reserve
 8.6
 7.0

 Other

 53.8
 56.0

 Total other long-term liabilities

 $
 475.8
 $
 547.2

 A rollforward of the warranty reserve, including both short and long-term reserve balances, for the years 2023, 2022 or 2021 was as follows:

 Warranty Reserve (in millions):
 2023
 2022
 2021

 Balance at beginning of year
 $
 50.3
 $
 49.5
 $
 22.4

 Product warranty expense
 13.5
 12.6
 11.9

 Deductions
 ( 14.9)
 ( 14.3)
 ( 10.1)

 Assumed in business acquisitions
 0.2
 2.5
 25.3

 Balance at end of year
 $
 49.1
 $
 50.3
 $
 49.5

 Note 8. Long-Term Debt
 Long-Term Debt (dollars in millions):

 January 1, 2023

 $ 1.15 billion credit facility, due March 2026, weighted average variable rate of 5.46 % at January 1, 2023

 $
 —
 $
 125.0

 0.65 % Fixed Rate Senior Notes due and paid April 2023

 —
 300.0

 0.95 % Fixed Rate Senior Notes due April 2024, callable after April 2022

 450.0
 450.0

 Term loan due October 2024, variable rate of 6.71 % at December 31, 2023 and 5.63 % at January 1, 2023, swapped to a Euro fixed rate of 0.612 %

 150.0
 150.0

 1.60 % Fixed Rate Senior Notes due April 2026

 450.0
 450.0

 Term loan due May 2026, variable rate of 5.61 % at January 1, 2023

 —
 245.0

 2.25 % Fixed Rate Senior Notes due April 2028

 700.0
 700.0

 2.50 % Fixed Rate Senior Notes due August 2030

 485.0
 485.0

 2.75 % Fixed Rate Senior Notes due April 2031

 1,030.0
 1,040.0

 Other debt
 1.0
 2.1

 Debt issuance costs
 ( 21.1)
 ( 26.5)

 Total long-term debt
 3,244.9
 3,920.6

 Current portion of long-term debt and other debt
 ( 600.1)
 ( 300.1)

 Total long-term debt, net of current portion
 $
 2,644.8
 $
 3,620.5

 As of December 31, 2023, no borrowings were outstanding under our $ 1.15 billion credit facility. Excluding interest and fees, no payments are due under the $ 1.15 billion unsecured credit facility ("credit facility") until it matures in March 2026. Borrowings under our credit facility and term loan are at variable rates which are, at our option, tied to a base rate, Eurocurrency rate or equivalent as defined in our credit agreements. Available borrowing capacity under the credit facility, which is reduced by borrowings and certain outstanding letters of credit, was $ 1,129.1 million at December 31, 2023. The credit agreement and term loans require the Company to comply with various financial and operating covenants and at December 31, 2023, the Company was in compliance with these covenants. At December 31, 2023, Teledyne had $ 41.9 million in outstanding letters of credit.
 During 2023, the Company repaid $ 125.0 million of amounts outstanding on its credit facility, the $ 300.0 million Fixed Rate Senior Notes due April 2023, and the remaining $ 245.0 million on its term loan due May 2026. The Company also repurchased and retired $ 10.0 million of its Fixed Rate Senior Notes due April 2031, recording a $ 1.6 million non-cash gain on the extinguishment of this debt.
 During 2022, the Company repaid $ 185.0 million of debt. The Company made $ 110.0 million of floating rate debt payments on its term loan due May 2026. The Company also repurchased and retired $ 75.0 million of its Fixed Rate Senior Notes due August 2030 and April 2031, recording a $ 10.6 million non-cash gain on the extinguishment of this debt.
 Maturities of long-term debt as of December 31, 2023 (in millions):
 Fiscal year

 2024
 $
 600.1

 2025
 0.2

 2026
 450.2

 2027
 0.2

 2028
 700.1

 Thereafter
 1,515.2

 Total principal payments
 3,266.0

 Debt issuance costs
 ( 21.1)

 Total debt
 $
 3,244.9

 The Company has no sinking fund requirements.
 Total net interest expense, including credit facility fees and other bank charges, was $ 77.3 million in 2023, $ 89.3 million in 2022 and $ 104.8 million in 2021. Cash payments for interest and credit facility fees and other bank charges totaled $ 87.9 million, $ 79.3 million and $ 117.2 million for 2023, 2022 and 2021, respectively. The 2021 amount included $ 30.5 million paid for bond financing and debt extinguishment costs.

 Note 9. Income Taxes
 Income (loss) before income taxes included the following (in millions):

 2023
 2022
 2021

 Domestic operations
 $
 532.4
 $
 490.3
 $
 108.0

 Foreign operations
 426.5
 417.8
 425.8

 Total income (loss) before income taxes
 $
 958.9
 $
 908.1
 $
 533.8

 The provision for income taxes included the following (in millions):
 2023
 2022
 2021

 Current provision (benefit)

 Federal
 $
 91.2
 $
 47.2
 $
 43.0

 State
 21.4
 14.8
 10.8

 57.1
 47.8
 57.5

 Total current provision (benefit)
 169.7
 109.8
 111.3

 Deferred provision (benefit)

 Federal
 ( 78.8)
 ( 39.0)
 ( 39.7)

 State
 ( 4.6)
 0.3
 ( 0.1)

 ( 14.0)
 48.1
 17.0

 Total deferred provision (benefit)
 ( 97.4)
 9.4
 ( 22.8)

 Provision (benefit) for income taxes
 $
 72.3
 $
 119.2
 $
 88.5

 The following is a reconciliation of the statutory federal income tax rate to the actual effective income tax rate:
 2023
 2022
 2021

 U.S. federal statutory income tax rate
 21.0
 %
 21.0
 %
 21.0
 %

 State and local taxes, net of federal benefit
 1.8
 1.7
 1.8

 Research and development tax credits
 ( 2.4)
 ( 1.8)
 ( 3.4)

 Investment tax credits
 ( 0.5)
 ( 0.5)
 ( 1.1)

 Foreign rate differential
 1.8
 1.5
 1.4

 Net accruals (reversals) for unrecognized tax benefits
 ( 10.8)
 ( 7.9)
 ( 2.4)

 Stock-based compensation
 ( 2.1)
 ( 1.1)
 ( 2.5)

 U.S. export sales
 ( 2.2)
 ( 2.0)
 ( 1.3)

 Acquisition-related costs
 —
 —
 1.7

 Other
 0.9
 2.2
 1.4

 Effective income tax rate
 7.5 %
 13.1
 %
 16.6
 %

 Deferred income taxes result from temporary differences in the recognition of income and expense for financial and income tax reporting purposes, and differences between the fair value of assets acquired in business combinations accounted for as purchases for financial reporting purposes and their corresponding tax bases. Deferred income taxes represent future tax benefits or costs to be recognized when those temporary differences reverse.

 The categories of assets and liabilities that have resulted in differences in the timing of the recognition of income and expense were as follows (in millions):

 Deferred income tax assets:
 2023
 2022

 Long-term:

 $
 29.5
 $
 32.0

 Inventory valuation
 29.1
 30.3

 Accrued vacation
 8.1
 8.3

 Deferred compensation and other benefit plans
 13.8
 12.7

 Postretirement benefits other than pensions
 0.7
 1.0

 Operating lease liabilities
 27.9
 29.9

 Capitalization of research and development
 141.1
 70.8

 Tax credit and net operating loss carryforward
 39.3
 44.6

 Other
 34.8
 32.6

 Valuation allowance
 ( 18.2)
 ( 16.1)

 Total deferred income tax assets
 306.1
 246.1

 Deferred income tax liabilities:

 Long-term:

 Intangible amortization
 638.7
 646.9

 Property, plant and equipment differences
 29.0
 31.9

 Operating lease right-of-use assets
 25.3
 26.7

 Unremitted earnings of foreign subsidiaries
 3.6
 3.1

 Other
 12.4
 12.9

 Total deferred income tax liabilities
 709.0
 721.5

 Net deferred income tax liabilities
 $
 402.9
 $
 475.4

 The Company is not permanently reinvested with respect to unremitted earnings of most of its foreign subsidiaries. The Company is subject to U.S. income tax on substantially all of these foreign earnings, while any remaining foreign earnings are eligible for potential U.S. tax deductions. As of December 31, 2023, the incremental tax cost to repatriate these earnings was not material.
 The Company continues to make an indefinite reinvestment assertion on the unrepatriated prior year earnings of its material subsidiaries in Canada. Those unremitted earnings were used to finance Canadian operations and investments. The Company estimates that future cash generation will be sufficient to meet future domestic cash requirements. Determination of the unrecognized deferred tax liability for historical unremitted Canadian earnings is not practicable due to the uncertainty and overall complexity of the potential calculations
 In assessing the need for a valuation allowance, the Company considers all positive and negative evidence, including recent financial performance, scheduled reversals of temporary differences, projected future taxable income, availability of taxable income in carryback periods and tax planning strategies. Based on a review of such information, management believes that it is possible that some portion of deferred tax assets will not be realized as a future benefit and therefore has recorded a valuation allowance. The valuation allowance for deferred tax assets increased by $ 2.1 million in 2023.
 At December 31, 2023, the Company had approximately $ 32.3 million of net operating loss carryforward primarily from the Company's foreign entities including the United Kingdom, Denmark and France, of which $ 28.0 million have no expiration dates and $ 4.3 million have expiration dates ranging from 2024 to 2040. The Company had Canadian capital loss carryforward in the amount of $ 3.6 million which has no expiration date. Also, the Company had aggregate Canadian federal and provincial investment tax credits of $ 11.9 million, which have expiration dates ranging from 2030 to 2042. The Company had Spanish federal research and development credit carryforward in the amount of $ 0.3 million, which have expiration dates ranging from 2025 to 2028. In addition, the Company had domestic federal and state net operating loss carryforward of $ 19.2 million and $ 175.8 million, respectively. Generally, federal net operating loss carryforward amounts are limited in their use by earnings of certain acquired subsidiaries. Of the $ 19.2 million federal net operation loss carryforward, $ 15.3 million have no expiration dates and $ 3.9 million have expiration dates ranging from 2024 to 2037. The state net operating loss carryforward amounts have expiration dates ranging from 2024 to 2042. Finally, the Company had state tax credits of $ 15.4 million, of which $ 10.1 million have no expiration date and $ 5.3 million have expiration dates ranging from 2025 to 2047.

 Unrecognized tax benefits (in millions):
 2023
 2022
 2021

 Beginning of year (a)
 $
 162.8
 $
 402.0
 $
 32.3

 Increase due to business combinations
 18.6
 —
 413.8

 Increase for tax positions taken during the current period
 3.4
 2.7
 6.3

 Increase in prior year tax positions
 3.0
 0.2
 2.5

 Reduction related to settlements with taxing authorities
 —
 ( 223.3)
 ( 1.6)

 Reduction related to lapse of the statute of limitations
 ( 96.3)
 ( 26.4)
 ( 20.7)

 Impact of exchange rate changes
 5.0
 7.6
 ( 30.6)

 End of year (a)
 $
 96.5
 $
 162.8
 $
 402.0

 (a) Beginning and end of year balances include amounts offset by deferred tax and amounts offset by potential refunds in other taxing jurisdictions.
 In the next 12 months, the Company anticipates the total unrecognized tax benefit for various federal, state and foreign tax items may be reduced by $ 21.5 million due to the expiration of statutes of limitation for various federal, state and foreign tax issues.
 Teledyne recognized net tax benefits and expense for interest and penalties related to unrecognized tax benefits within the provision for income taxes in our statements of income of $ 10.3 million of benefits, $ 12.2 million of benefits and $ 2.4 million of expense, for 2023, 2022 and 2021, respectively. Interest and penalties in the amount of $ 36.9 million, $ 45.6 million and $ 160.8 million were recognized in the 2023, 2022 and 2021 balance sheets, respectively. In 2021, interest and penalties of $ 157.0 million were accrued as a result of the acquisition of FLIR. Substantially all of the unrecognized tax benefits as of December 31, 2023, if recognized, would affect our effective tax rate.
 Teledyne files income tax returns in the United States federal and state jurisdictions and in various foreign jurisdictions. The Company has substantially concluded income tax matters in the U.S. through 2016, in Canada through 2012, in Sweden through 2018, in Norway through 2018, in Belgium through 2019, in France through 2019 and in the United Kingdom through 2015.
 Cash payments for federal, state and foreign income taxes were $ 313.0 million for 2023, which are net of $ 14.7 million in tax refunds. Cash payments for federal, state and foreign income taxes were $ 212.4 million for 2022, which are net of $ 20.1 million in tax refunds. Cash payments for federal, state and foreign income taxes were $ 83.6 million for 2021, which are net of $ 22.4 million in tax refunds.

 Note 10. Pension Plans and Postretirement Benefits
 Pension Plans
 Teledyne has two domestic qualified defined benefit pension plans covering substantially all U.S. employees hired before January 1, 2004, excluding FLIR U.S. employees. All FLIR U.S. employees participate in a defined contribution plan, as FLIR had no legacy U.S. pension plans. As of January 1, 2004, new Teledyne hires participate in a defined contribution plan only. The Company also has several small domestic non-qualified and foreign-based defined benefit pension plans. The measurement date for the Company's pension plans is December 31.
 The domestic qualified pension plans allow participants to elect a lump-sum payment at retirement. In 2023, 2022 and 2021, the Company made lump sum payments of $ 17.3 million, $ 24.8 million and $ 24.5 million, respectively, from the domestic qualified pension plans assets to certain participants in the plan. Each year beginning with 2014, the Society of Actuaries released revised mortality tables, which updated life expectancy assumptions. In consideration of these tables, each year the Company reviews the mortality assumptions used in determining our pension and postretirement obligations.
 Net periodic benefit expense (income) allocation

 2023
 2022
 2021
 2023
 2022
 2021

 Service cost - benefits earned during the period (in millions)

 $
 5.2
 $
 7.6
 $
 9.3
 $
 0.9
 $
 1.0
 $
 1.3

 Pension non-service (income) expense (in millions):
 2023
 2022
 2021
 2023
 2022
 2021

 Interest cost on benefit obligation

 $
 31.7
 $
 22.8
 $
 21.6
 $
 1.9
 $
 0.8
 $
 0.7

 Expected return on plan assets

 ( 52.6)
 ( 54.9)
 ( 55.8)
 ( 1.6)
 ( 1.1)
 ( 1.0)

 Amortization of prior service cost

 ( 1.8)
 ( 1.8)
 ( 3.6)
 0.1
 —
 0.1

 Amortization of actuarial loss

 9.9
 22.7
 26.3
 0.2
 —
 0.4

 Settlements/Curtailment

 —
 —
 —
 —
 ( 0.1)
 —

 Pension non-service (income) expense

 $
 ( 12.8)
 $
 ( 11.2)
 $
 ( 11.5)
 $
 0.6
 $
 ( 0.4)
 $
 0.2

 Obligations and funded status
 The expected long-term rate of return on plan assets is reviewed annually, taking into consideration the Company's asset allocation, historical returns on the types of assets held, the current economic environment, and prospective expectations.

 Teledyne determines the discount rate based on a model which matches the timing and amount of expected benefit payments to maturities of high-quality corporate bonds priced as of the pension plan measurement date. The yields on the bonds are used to derive a discount rate for the obligation.
 The following assumptions were used to measure the net benefit income or expense within each respective year for the domestic qualified plans and the foreign plans:
 Pension Plan Assumptions:
 Discount rates
 Increase in future compensation levels
 Expected long-term rate of return

 Domestic plans - 2023

 5.71 % - 5.72 %

 6.58 % - 7.80 %

 Domestic plans - 2022

 2.91 % - 3.08 %

 6.58 % - 7.80 %

 Domestic plans - 2021

 2.55 % - 2.78 %

 6.71 % - 7.80 %

 Foreign plans - 2023

 2.20 % - 4.80 %

 1.50 % - 3.00 %

 1.25 % - 5.10 %

 Foreign plans - 2022

 0.20 % - 1.80 %

 1.00 % - 2.50 %

 1.00 % - 2.70 %

 Foreign plans - 2021

 0.10 % - 1.20 %

 1.00 % - 2.50 %

 0.80 % - 2.50 %

 For its domestic and foreign pension plans the Company is projecting a weighted-average long-term rate of return on plan assets of 6.86 % and 5.02 % in 2024, respectively.

 2023
 2022
 2023
 2022

 Changes in benefit obligation (in millions):

 Benefit obligation - beginning of year
 $
 583.0
 $
 799.3
 $
 45.2
 $
 60.2

 Service cost - benefits earned during the year
 5.2
 7.6
 0.9
 1.0

 Interest cost on projected benefit obligation
 31.7
 22.8
 1.9
 0.8

 Actuarial (gain) loss
 23.6
 ( 179.1)
 3.1
 ( 12.0)

 Benefits paid
 ( 59.8)
 ( 67.6)
 ( 2.1)
 ( 1.6)

 Other - including foreign currency, settlements/curtailments
 0.4
 —
 2.5
 ( 3.2)

 Benefit obligation - end of year
 $
 584.1
 $
 583.0
 $
 51.5
 $
 45.2

 Accumulated benefit obligation - end of year
 $
 581.7
 $
 580.5
 $
 47.9
 $
 42.2

 The key assumptions used to measure the benefit obligation at each respective year-end were:
 Key assumptions:
 Domestic Plans
 Foreign Plans

 2023
 2022
 2021
 2023
 2022
 2021

 Discount rate
 5.40 % - 5.45 %

 5.71 % - 5.72 %

 2.91 % - 3.08 %

 1.30 % - 4.50 %

 2.20 % - 4.80 %

 0.20 % - 1.80 %

 Salary growth rate

 1.50 % - 3.00 %

 1.50 % - 3.00 %

 1.00 % - 2.50 %

 Plan assets

 2023
 2022
 2023
 2022

 Changes in plan assets (in millions):

 Fair value of net plan assets - beginning of year

 $
 719.7
 $
 864.3
 $
 35.0
 $
 52.9

 Actual return on plan assets

 78.0
 ( 79.2)
 2.3
 ( 12.6)

 Employer contribution - other benefit plan

 2.5
 2.2
 1.5
 1.5

 Foreign currency changes

 —
 —
 2.0
 ( 4.6)

 Benefits paid

 ( 59.8)
 ( 67.6)
 ( 2.2)
 ( 1.7)

 Other
 —
 —
 —
 ( 0.5)

 Fair value of net plan assets - end of year

 $
 740.4
 $
 719.7
 $
 38.6
 $
 35.0

 The following tables sets forth the funded status and amounts recognized in the consolidated balance sheets at year-end 2023 and 2022 for the domestic qualified and nonqualified pension plans and the foreign-based pension plans for benefits provided to certain employees (in millions):

 2023
 2022
 2023
 2022

 Funded (unfunded) status
 $
 156.3
 $
 136.7
 $
 ( 12.9)
 $
 ( 10.2)

 Amounts recognized in the consolidated balance sheets as a debit (credit):

 Balance sheet item
 Balance sheet location

 Prepaid pension assets
 Other assets, net - noncurrent
 $
 203.3
 $
 178.4
 $
 —
 $
 —

 Accrued pension obligations short-term
 ( 2.9)
 ( 3.9)
 ( 0.6)
 ( 0.5)

 Accrued pension obligations long-term
 Other long-term liabilities
 ( 44.1)
 ( 37.8)
 ( 12.3)
 ( 9.7)

 Net amount recognized
 $
 156.3
 $
 136.7
 $
 ( 12.9)
 $
 ( 10.2)

 Amounts recognized in AOCI:

 Net prior service cost (credit)
 $
 1.0
 $
 ( 1.2)
 $
 0.4
 $
 0.5

 Net loss
 318.4
 330.2
 8.2
 5.6

 Net amount recognized, before tax effect
 $
 319.4
 $
 329.0
 $
 8.6
 $
 6.1

 Amounts for pension plans with accumulated benefit obligations in excess of fair value of plan assets are as follows (in millions):
 2023
 2022

 Projected benefit obligation
 $
 98.4
 $
 84.4

 Accumulated benefit obligation
 $
 94.8
 $
 81.6

 Fair value of plan assets
 $
 38.6
 $
 32.7

 At year-end 2023 and 2022 the Company had an accumulated non-cash reduction to stockholders' equity of $ 249.6 million and $ 255.5 million, respectively, related to its pension and postretirement plans. The accumulated non-cash reductions to stockholders' equity did not affect net income and were recorded net of accumulated deferred taxes of $ 77.0 million at year end 2023 and $ 77.6 million at year end 2022.
 Estimated future pension plan benefit payments (in millions):

 2024
 $
 53.0
 $
 2.4

 2025
 $
 53.2
 $
 2.4

 2026
 $
 55.3
 $
 2.7

 2027
 $
 54.7
 $
 2.6

 2028
 $
 56.4
 $
 3.1

 2029 - 2033
 $
 243.0
 $
 14.2

 Investments
 The Company has an active management policy for the pension assets in the qualified domestic pension plans. As of December 31, 2023, the long-term asset allocation target for the domestic plans consists of approximately 35 % in equity instruments, approximately 54 % in fixed income instruments and approximately 11 % in alternatives.
 The pension plans' investments are stated at fair value. Plan investments that are considered a level 1 fair value hierarchy and are valued at quoted market prices in active markets. Plan investments that are considered a level 2 fair value hierarchy and are valued based on observable market data. Plan investments that would be considered a level 3 fair value hierarchy are valued based on management's own assumption about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk).
 Certain investments measured at fair value using net asset values as a practical expedient are not required to be categorized in the fair value hierarchy table listed below. As such, the total fair value of these net asset values based investments has been included in the table below to permit reconciliation to the plan asset amounts previously disclosed.

 The fair values of the Company's net pension assets, by fair value hierarchy, for both the U.S. and foreign pension plans as of December 31, 2023, by asset category are as follows (in millions):

 Asset category:(a)
 Level 1
 Level 2
 Level 3
 Total

 Cash and cash equivalents (b)
 $
 —
 $
 20.1
 $
 —
 $
 20.1

 Equity securities
 3.5
 209.0
 —
 212.5

 U.S. Government securities and futures
 231.4
 11.4
 —
 242.8

 Corporate bonds
 —
 22.5
 —
 22.5

 Insurance contracts related to foreign plans
 —
 13.1
 —
 13.1

 Fair value of net plan assets at the end of the year
 $
 234.9
 $
 276.1
 $
 —
 $
 511.0

 Investments measured at net asset value:

 Alternatives
 $
 189.3

 Mutual funds (c)
 4.8

 Mortgage-backed securities
 60.3

 High yield bonds
 13.6

 Fair value of net plan assets at the end of the year
 $
 268.0

 (a) There were no transfers of plan assets between the three levels of the fair value hierarchy during the year.
 (b) Reflects cash and cash equivalents held in overnight cash investments.
 (c) The mutual funds are invested in equity securities.

 The fair values of the Company's net pension assets, by fair value hierarchy, for both the U.S. and foreign pension plans as of January 1, 2023, by asset category are as follows (in millions):

 Asset category: (a)
 Level 1
 Level 2
 Level 3
 Total

 Cash and cash equivalents (b)
 $
 —
 $
 48.3
 $
 —
 $
 48.3

 Equity securities
 2.8
 185.7
 —
 188.5

 U.S. Government securities and futures
 225.9
 11.2
 —
 237.1

 Corporate bonds
 —
 22.4
 —
 22.4

 Insurance contracts related to foreign plans
 —
 10.7
 —
 10.7

 Fair value of net plan assets at the end of the year
 $
 228.7
 $
 278.3
 $
 —
 $
 507.0

 Investments measured at net asset value:

 Alternatives
 $
 177.5

 Mutual funds (c)
 4.3

 Mortgage-backed securities
 53.6

 High yield bonds
 12.3

 Fair value of net plan assets at the end of the year
 $
 247.7

 (a) There were no transfers of plan assets between the three levels of the fair value hierarchy during the year.
 (b) Reflects cash and cash equivalents held in overnight cash investments.
 (c) The mutual funds are invested in equity securities.
 U.S. equities are valued at the closing price reported in an active market on which the individual securities are traded. U.S. equities and non-U.S. equities are also valued at the net asset value provided by the independent administrator or custodian of the commingled fund. The net asset value is based on the value of the underlying equities, which are traded on an active market. Corporate bonds are valued using inputs such as the closing price reported, if traded on an active market, values derived from comparable securities of issuers with similar credit ratings, or under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments. Fixed income investments are also valued at the net asset value provided by the independent administrator or custodian of the fund. The net asset value is based on the underlying assets, which are valued using inputs such as the closing price reported, if traded on an active market, values derived from comparable securities of issuers with similar credit ratings, or under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments. Alternative investments are primarily valued at the net asset value as determined by the independent administrator or custodian of the fund. The net asset value is based on the underlying investments, which are valued using inputs such as quoted market prices of identical instruments or values derived from comparable securities of issuers with similar credit ratings, or under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments.
 Defined Benefit Postretirement Plans
 The Company sponsors several postretirement defined benefit plans covering certain salaried and hourly employees. The plans provide health care and life insurance benefits for certain eligible retirees. Total cost for these plans was less than

 $ 1.0 million for each fiscal year 2023, 2022 and 2021.
 Deferred Contribution Plans
 The Company's contributions associated with its 401(k) plans were $ 31.4 million, $ 29.7 million and $ 15.2 million, for 2023, 2022 and 2021, respectively.
 Deferred Compensation Plans
 The Company has non-qualified executive deferred compensation plans that provide supplemental retirement income benefits for a select group of management. This plan permits eligible employees to make salary and bonus deferrals that are 100 % vested. Teledyne has an unsecured obligation to pay in the future the value of the deferred compensation adjusted to reflect the performance, whether positive or negative, of selected investment measurement options chosen by each participant during the deferral period. In addition, the Company has separate deferred compensation plans acquired in connection with the FLIR and ETM acquisitions, and these plans were frozen at the end of fiscal years 2021 and 2022, respectively.
 As of December 31, 2023 and January 1, 2023, $ 102.2 million and $ 92.2 million, respectively, is included in other long-term liabilities related to deferred compensation liabilities on the consolidated balance sheets. Additionally, the Company purchased life insurance policies on certain participants to potentially offset these unsecured obligations. These policies are recorded at their cash surrender value as determined by the insurance carrier. The cash surrender value of these policies was $ 101.3 million and $ 94.7 million, as of December 31, 2023 and January 1, 2023, respectively, and is primarily included in other non-current assets on the consolidated balance sheets.

 Note 11. Stockholders ' Equity
 Common stock and treasury stock activity:
 Common Stock
 Treasury Stock

 Balance, January 2, 2022

 47,194,766
 502,470

 Issued
 —
 ( 220,339)

 Balance, January 1, 2023

 47,194,766
 282,131

 Issued
 137,079
 ( 282,131)

 Balance, December 31, 2023

 47,331,845
 —

 Shares issued from treasury stock include stock options exercised as well as shares issued under certain other compensation plans.
 Stock Options
 The Company recorded $ 12.4 million, $ 17.9 million, and $ 20.0 million for stock option expense for 2023, 2022 and 2021, respectively. The Company issues shares of common stock upon the exercise of stock options.
 During 2023 and 2022, the amount of cash received from the exercise of stock options was $ 45.4 million and $ 23.6 million, respectively. The total pretax intrinsic value of options exercised during 2023 and 2022 (which is the amount by which the stock price exceeded the exercise price of the options on the date of exercise) was $ 111.0 million and $ 53.7 million, respectively. At December 31, 2023, the intrinsic value of stock options outstanding was $ 262.9 million and the intrinsic value of stock options exercisable was $ 255.1 million.
 At December 31, 2023, there was $ 13.1 million of total unrecognized compensation cost related to non-vested stock option awards which is expected to be recognized over a weighted-average period of 1.4 years. This amount can be impacted by employee retirements or terminations. On January 23, 2024, the Company granted approximately 67,000 stock options at an exercise price of $ 441.98 per share and a weighted-average fair value of $ 171.05 per share.

 Stock option valuation assumptions:
 2022
 2021

 Expected dividend yield
 n/a
 n/a

 Expected volatility
 26.5 %
 27.8 %

 Risk-free interest rate
 3.33 %

 0.09 % to 1.58 %

 Expected life in years
 6.4
 5.2

 The Company did not grant stock options in 2023. Based on the assumptions used in the valuation of stock options, the grant date weighted average fair value of stock options granted in 2022 and 2021 was $ 124.44 and $ 134.88, respectively.

 Stock option transactions for Teledyne's stock option plans are summarized as follows:

 2023
 2022
 2021

 Beginning balance
 1,726,731
 $
 223.43
 1,793,857
 $
 206.08
 1,819,147
 $
 170.10

 Granted
 —
 $
 —
 135,751
 $
 360.39
 211,973
 $
 440.48

 Exercised
 ( 372,739)
 $
 121.73
 ( 179,828)
 $
 131.44
 ( 213,384)
 $
 118.55

 Canceled or expired
 ( 16,020)
 $
 389.85
 ( 23,049)
 $
 397.36
 ( 23,879)
 $
 328.15

 Ending balance
 1,337,972
 $
 249.76
 1,726,731
 $
 223.43
 1,793,857
 $
 206.08

 Options exercisable at end of period
 1,190,838
 $
 232.10
 1,395,949
 $
 182.53
 1,328,191
 $
 148.73

 The following table provides certain information with respect to stock options outstanding and stock options exercisable at December 31, 2023, under the stock option plans.

 Stock Options Outstanding
 Stock Options Exercisable

 Range of Exercise Prices
 Remaining life in years

 $ 40.70 -$ 99.99

 164,086
 $
 83.89
 1.4
 164,086
 $
 83.89

 $ 100.00 -$ 199.99

 419,498
 $
 156.20
 3.6
 419,498
 $
 156.20

 $ 200.00 -$ 299.99

 251,966
 $
 217.65
 5.1
 251,966
 $
 217.65

 $ 300.00 -$ 399.99

 319,635
 $
 373.76
 7.3
 231,537
 $
 378.78

 $ 400.00 -$ 445.21

 182,787
 $
 440.85
 7.7
 123,751
 $
 440.86

 1,337,972
 $
 249.76
 5.1
 1,190,838
 $
 232.10

 Restricted Stock
 The following table shows restricted stock award activity:
 Employee Time-Based Restricted Stock Units
 Employee Performance-Based Restricted
Stock Awards
 Non-Employee Directors Restricted Stock Units

 Restricted Stock:
 Weighted average fair value per share
 Weighted average fair value per share
 Weighted average fair value per share

 Balance, January 3, 2021
 —
 —
 43,405
 $
 228.80
 $
 9,766
 $
 224.94

 Granted
 62,974
 10,227
 $
 334.92
 2,592
 $
 450.27

 Vested
 ( 8,720)
 ( 15,423)
 $
 176.64
 ( 5,300)
 $
 227.9

 Forfeited/Canceled
 ( 4,903)
 ( 380)
 $
 176.64
 —
 $
 —

 Balance, January 2, 2022

 49,351
 37,829
 $
 279.27
 7,058
 $
 308.54

 Granted
 89,472
 $ 360.39
 19,492
 $
 427.51
 3,904
 $
 451.13

 Vested
 ( 15,698)
 ( 17,522)
 $
 200.00
 ( 1,440)
 $
 450.27

 Forfeited/Canceled
 ( 5,653)
 $ 399.20
 ( 398)
 $
 388.15
 —
 $
 —

 Balance, January 1, 2023

 117,472
 $ 372.51
 39,401
 $
 386.76
 9,522
 $
 345.57

 Granted
 2,316
 $ 418.20
 14,139
 $
 361.08
 4,190
 $
 404.92

 Vested
 ( 39,705)
 $ 376.99
 ( 9,106)
 $
 360.33
 ( 1,880)
 $
 451.16

 Forfeited/Canceled
 ( 10,644)
 $ 369.60
 ( 2,616)
 $
 346.08
 —
 $
 —

 Balance, December 31, 2023

 69,439
 $ 371.90
 41,818
 $
 357.43
 11,832
 $
 349.81

 Employee Time-based Restricted Stock Units
 The Company recorded $ 14.2 million, $ 7.8 million and $ 7.8 million in compensation expense related to restricted stock units to employees for fiscal years 2023, 2022 and 2021 respectively, which is primarily recorded in the Digital Imaging segment. At December 31, 2023, there was $ 19.2 million of total estimated unrecognized compensation cost related to non-vested awards which is expected to be recognized over a weighted-average period of approximately 1.8 years. This amount can be impacted by employee retirements or terminations. On January 23, 2024, the Company granted approximately 70,000 time-based restricted stock units with a weighted-average fair value of $ 441.98 per share.

 Employee Performance-based Restricted Stock Awards
 Under Teledyne's restricted stock award program key officers and executives receive a grant of stock equal to a specified percentage of the participant's annual base salary at the date of grant. The restricted stock is subject to transfer and forfeiture restrictions during an applicable "restricted period". The restrictions have both time-based and performance-based components. The restricted period expires (and the restrictions lapse) on the third anniversary of the date of grant, subject to the achievement of stated performance objectives over a specified three-year performance period. If employment is terminated (other than by death, retirement or disability) during the restricted period, the stock grant is forfeited.
 The estimated expense for restricted stock awards with both time-based and performance-based components to employees is based on a lattice-based simulation which takes into consideration several factors including volatility, risk free interest rates and the correlation of Teledyne's stock price with the comparator, which has been the S&P 500 Index for awards granted since 2021. The Company recorded $ 5.2 million, $ 5.1 million and $ 3.5 million in compensation expense related to restricted stock awards to employees for fiscal years 2023, 2022 and 2021, respectively. At December 31, 2023, there was $ 5.8 million of total estimated unrecognized compensation cost related to non-vested awards which is expected to be recognized over a weighted-average period of approximately 1.5 years.
 Non-Employee Directors Restricted Stock
 Non-employee directors each received restricted stock units valued at $ 170,000 in 2023, $ 170,000 in 2022 and $ 130,000 in 2021 or valued at half the amount for a person who becomes a director for the first time after the date of the Annual Meeting. The restricted stock units generally vest one year following the date of grant and are settled in shares of common stock on the date of vesting unless a director has elected to defer settlement of the award until his or her separation from Board service. The annual expense related to non-employee director's restricted stock units was $ 1.7 million for 2023, $ 1.7 million for 2022 and $ 1.2 million for 2021, with an immaterial amount of unrecognized compensation cost that will be recognized over the first half of 2024.

 Note 12. Earnings Per Share
 The following table sets forth the computations of basic and diluted earnings per common share (amounts in millions, except per share data):

 Earnings Per Common Share:
 2023
 2022
 2021

 Net income attributable to Teledyne
 $
 885.7
 $
 788.6
 $
 445.3

 Basic earnings per common share:

 Weighted average common shares outstanding
 47.1
 46.8
 43.2

 Basic earnings per common share
 $
 18.80
 $
 16.85
 $
 10.31

 Diluted earnings per share:

 Weighted average common shares outstanding
 47.1
 46.8
 43.2

 Effect of diluted securities (primarily stock options)
 0.8
 0.9
 1.1

 Weighted average diluted common shares outstanding
 47.9
 47.7
 44.3

 Diluted earnings per common share
 $
 18.49
 $
 16.53
 $
 10.05

 In 2023, 2022 and 2021, the Company excluded 0.2 million of stock options in the computation of diluted earnings per share because the effect of their inclusion would have been anti-dilutive.

 Note 13. Accumulated Other Comprehensive Income (Loss)
 The following table summarizes the changes in AOCI for the fiscal years ended December 31, 2023, and January 1, 2023:

 Foreign Currency Translation
 Cash Flow Hedges
 Pension and Postretirement Benefits
 Total

 Balance as of January 2, 2022
 $
 ( 129.0)
 $
 ( 3.4)
 $
 ( 297.6)
 $
 ( 430.0)

 Other comprehensive income (loss) before reclassifications
 ( 343.3)
 16.4
 —
 ( 326.9)

 Amounts reclassified from AOCI
 —
 ( 11.7)
 42.1
 30.4

 Net other comprehensive income (loss)
 ( 343.3)
 4.7
 42.1
 ( 296.5)

 Balance as of January 1, 2023
 ( 472.3)
 1.3
 ( 255.5)
 ( 726.5)

 Other comprehensive income (loss) before reclassifications
 79.6
 14.8
 —
 94.4

 Amounts reclassified from AOCI
 —
 ( 7.9)
 5.9
 ( 2.0)

 Net other comprehensive income (loss)
 79.6
 6.9
 5.9
 92.4

 Balance as of December 31, 2023
 $
 ( 392.7)
 $
 8.2
 $
 ( 249.6)
 $
 ( 634.1)

 The reclassification out of AOCI for the fiscal years ended December 31, 2023, and January 1, 2023, are as follows:
 2023
 2022

 Amount reclassified from AOCI
 Amount reclassified from AOCI
 Financial Statement Presentation

 Gain (loss) on cash flow hedges:

 Gain (loss) recognized in income on derivatives
 $
 ( 10.6)
 $
 ( 15.7)
 See Note 14

 Income tax impact
 2.7
 4.0
 Provision for income taxes

 Total
 $
 ( 7.9)
 $
 ( 11.7)

 Amortization of defined benefit pension and postretirement plan items:

 Amortization of prior service cost
 $
 ( 1.7)
 $
 ( 1.8)
 See Note 10

 Amortization of net actuarial loss
 10.1
 22.7
 See Note 10

 Pension adjustments
 ( 1.0)
 45.2
 See Note 10

 Total before tax
 7.4
 66.1

 Income tax impact
 ( 1.5)
 ( 24.0)

 Net of tax
 $
 5.9
 $
 42.1

 Note 14. Derivative Instruments
 As of December 31, 2023, Teledyne had foreign currency forward contracts designated as cash flow hedges to buy Canadian dollars and to sell U.S. dollars totaling $ 164.2 million. These foreign currency forward contracts have maturities ranging from March 2024 to February 2026. As of December 31, 2023, Teledyne had foreign currency forward contracts designated as cash flow hedges to buy British pounds and to sell U.S. dollars totaling $ 16.8 million. These foreign currency forward contracts have maturities ranging from March 2024 to February 2025.
 The cross currency swap has notional amounts of 156.0 million and $ 150.0 million and mature in October 2024.
 In addition, the Company utilizes foreign currency forward contracts which are not designated as hedging instruments for accounting purposes to mitigate foreign exchange rate risk associated with foreign currency denominated monetary assets and liabilities, including intercompany receivables and payables. As of December 31, 2023, Teledyne had foreign currency contracts of this type primarily in the following pairs (in millions):

 Contracts to Buy
 Contracts to Sell

 Currency
 Amount
 Currency
 Amount

 Canadian Dollars
 $
 11.1
 Euros

 7.5

 Canadian Dollars
 $
 271.5
 US$
 200.7

 Danish Krone
 Kr.
 115.6
 US$
 17.0

 Euros

 55.5
 US$
 59.6

 Great Britain Pounds

 20.6
 Euros

 23.8

 Great Britain Pounds

 34.8
 US$
 43.8

 Norwegian Krone
 kr
 138.1
 US$
 13.1

 Swedish Krona
 kr
 205.0
 Euros

 16.8

 The above table includes non-designated hedges derived from terms contained in triggered or previously designated cash flow hedges. The gains and losses on these derivatives which are not designated as hedging instruments, are intended to, at a minimum, partially offset the transaction gains and losses recognized in earnings.
 All derivatives are recorded on the balance sheet at fair value. The accounting for income and losses resulting from changes in fair value depends on the use of the derivative and whether it is designated and qualifies for hedge accounting. Teledyne does not use foreign currency forward contracts for speculative or trading purposes.
 The effect of derivative instruments designated as cash flow hedges for 2023 and 2022 was as follows (in millions):

 2023
 2022

 Net gain (loss) recognized in AOCI - foreign exchange contracts (a)
 $
 19.3
 $
 17.6

 Net gain (loss) recognized in AOCI - interest rate contracts
 $
 —
 $
 1.7

 Net gain (loss) reclassified from AOCI into revenue/cost of sales - foreign exchange contracts
 $
 ( 6.2)
 $
 4.8

 Net gain (loss) reclassified from AOCI into interest expense - foreign exchange contracts
 $
 7.6
 $
 5.2

 Net gain (loss) reclassified from AOCI into interest expense -interest rate contracts
 $
 0.6
 $
 0.4

 Net gain (loss) reclassified from AOCI into other income and expense, net - foreign exchange contracts (b)
 $
 8.0
 $
 15.5

 (a)Effective portion
 (b)Amount reclassified to offset earnings impact of liability hedged by cross currency swap
 Net deferred gains recorded in AOCI, net of tax, for forward contracts that will mature in the next 12 months total $ 3.4 million. These gains are expected to be offset by anticipated losses in the value of the forecasted underlying hedged item. Amounts related to the cross currency swaps expected to be reclassified to AOCI into income in the next 12 months total $ 5.0 million.
 The effect of derivative instruments not designated as cash flow hedges recognized in other income and expense for 2023 and 2022 was an expense of $ 13.7 million and expense of $ 32.0 million, respectively.

 Note 15. Fair Value Measurements
 Cash equivalents were $ 265.1 million and $ 167.1 million at December 31, 2023 and January 1, 2023, respectively. The Company has categorized its cash equivalents as a Level 1 financial asset, measured at fair value based on quoted prices in active markets of identical assets.
 Teledyne estimates the fair value of its long-term debt based on debt of similar type, rating and maturity and at comparable interest rates. The Company's long-term debt is considered a level 2 fair value hierarchy and is valued based on observable market data. As of December 31, 2023 and January 1, 2023, the aggregate fair values of our borrowings were $ 2,965.3 million and $ 3,492.7 million, respectively, and the carrying values were $ 3,266.0 million and $ 3,947.1 million, respectively.
 The fair values of the Company's derivative financial instruments are presented below. All fair values for these derivatives were measured using Level 2 information as defined by the accounting standard hierarchy (in millions):
 Asset (Liability) Derivative Positions
 Balance sheet location
 January 1, 2023

 Derivatives designated as hedging instruments:

 Cash flow forward contracts
 Other current assets
 $
 3.7
 $
 0.4

 Cash flow forward contracts
 Other non-current assets
 2.4
 $
 —

 Cash flow forward contracts
 —
 ( 6.8)

 Interest rate contracts
 Other current assets
 —
 0.7

 Cash flow cross currency swaps
 Other current assets
 0.1
 2.7

 Cash flow cross currency swaps
 ( 21.3)
 ( 14.0)

 Cash flow cross currency swaps
 Other long-term liabilities
 —
 ( 18.3)

 Total derivatives designated as hedging instruments
 ( 15.1)
 ( 35.3)

 Derivatives not designated as hedging instruments:

 Non-designated foreign currency forward contracts
 Other current assets
 14.2
 3.5

 Non-designated foreign currency forward contracts
 ( 3.2)
 ( 7.0)

 Total derivatives not designated as hedging instruments
 11.0
 ( 3.5)

 Total asset (liability) derivatives
 $
 ( 4.1)
 $
 ( 38.8)

 The carrying value of other on-balance-sheet financial instruments approximates fair value, and the cost, if any, to

 terminate off-balance sheet financial instruments (primarily letters of credit) is not significant.

 Note 16. Leases
 Operating Leases
 Teledyne has more than 150 long-term operating lease agreements for manufacturing facilities and office space. These agreements frequently include one or more renewal options and may require the Company to pay for non-lease components such as utilities, taxes, insurance and maintenance expense. The Company accounts for lease and non-lease components as a single lease component when the payments are fixed. Variable payments included in the lease agreement are expensed as incurred. No lease agreement imposes a restriction on the Company's ability to engage in financing transactions or enter into further lease agreements. At December 31, 2023, Teledyne has right-of-use assets of $ 141.7 million included in noncurrent other assets, net on the consolidated balance sheets.
 At December 31, 2023, future minimum lease payments for operating leases with non-cancelable terms of more than one year were as follows (in millions):

 Operating lease commitments:

 2024
 $
 36.4

 2025
 33.2

 2026
 27.3

 2027
 22.3

 2028
 15.9

 Thereafter
 39.4

 Total minimum lease payments
 174.5

 Less:

 Imputed interest
 ( 21.0)

 Current portion (included in current accrued liabilities)
 ( 30.1)

 Present value of minimum lease payments, net of current portion (included in other long-term liabilities)
 $
 123.4

 The weighted average remaining lease term for operating leases is approximately 6.4 years and the weighted average discount rate is approximately 4.72 %. Rental expense under operating leases, including leases with a term of 12 months or less, net of immaterial sublease income, was $ 43.9 million in 2023, $ 45.1 million in 2022 and $ 40.9 million in 2021. Variable lease expense was $ 1.6 million in 2023, $ 5.9 million in 2022 and $ 5.8 million in 2021. Cash paid for amounts included in the measurement of lease liabilities was $ 39.5 million for 2023 and $ 36.9 million for 2022. Right-of-use assets obtained in exchange for lease obligations was $ 21.7 million for 2023 and $ 26.1 million for 2022.
 Finance Leases and Subleases
 The Company's finance leases and subleases are not material.

 Note 17. Commitments and Contingencies
 Trade Compliance Matters
 Teledyne has made voluntary disclosures to the U.S. Department of State and the U.S. Department of Commerce, including to the Bureau of Industry and Security ("BIS") with respect to Teledyne FLIR shipments of products from non-U.S. jurisdictions which were not authorized due to a potentially incorrect de minimis calculation methodology under section 734.4 and Supplement No. 2 of the EAR. Furthermore, Teledyne has made voluntary disclosures to export authorities in jurisdictions outside the U.S. for certain potential violations of local export laws, which may increase its penalty exposure.
 At this time, based on available information, the Company is unable to reasonably estimate the time it may take to resolve these matters or the amount or range of potential loss, penalty or other government action, if any, that may be incurred in connection with these matters. However, an unfavorable outcome could result in substantial fines and penalties or loss or suspension of export privileges or of particular authorizations that could be material to the Company's financial position, results of operations or cash flows in and following the period in which such an outcome becomes estimable or known.
 Environmental Remediation Obligations
 The Company is subject to federal, state and local environmental laws and regulations which require that it investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations, including sites at which the Company has been identified as a potentially responsible party under the federal Superfund laws and comparable state laws.
 At December 31, 2023, the Company's reserves for environmental remediation obligations totaled $ 5.4 million, of which $ 1.5 million is included in current accrued liabilities and the remainder included in other long-term liabilities. The Company periodically evaluates whether it may be able to recover a portion of future costs for environmental liabilities from its insurance carriers and from third parties. The timing of expenditures depends on a number of factors that vary by site, including the nature and extent of contamination, the number of potentially responsible parties, the timing of regulatory approvals, the

 complexity of the investigation and remediation, and the standards for remediation. The Company expects that it will expend present accruals over many years and will complete remediation of all sites with which it has been identified in up to thirty years.
 Other Claims and Legal Matters
 Various claims (whether based on U.S. Government or Company audits and investigations or otherwise) may be asserted against the Company related to its U.S. Government contract work, including claims based on business practices and cost classifications and actions under the False Claims Act. Although such claims are generally resolved by detailed fact-finding and negotiation, on those occasions when they are not so resolved, civil or criminal legal or administrative proceedings may ensue. Depending on the circumstances and the outcome, such proceedings could result in fines, penalties, compensatory and treble damages or the cancellation or suspension of payments under one or more U.S. Government contracts. Under government regulations, a company, or one or more of its operating divisions or units, can also be suspended or debarred from government contracts based on the results of investigations. However, although the outcome of these matters cannot be predicted with certainty, management does not believe there is any audit, review or investigation currently pending against the Company of which management has knowledge that is likely to result in suspension or debarment of the Company, or that is otherwise likely to have a material adverse effect on the Company's financial condition or liquidity, although the resolution in any reporting period of one or more of these matters could have a material adverse effect on the Company's results of operations for that period.
 A number of other lawsuits, claims and proceedings have been or may be asserted against the Company, including those pertaining to product liability, acquisitions, patent infringement, commercial contracts, employment and employee benefits. While the outcome of litigation cannot be predicted with certainty, and some of these lawsuits, claims or proceedings may be determined adversely to the Company, management does not believe that the disposition of any such pending matters is likely to have a material adverse effect on the Company's financial condition.

 Note 18. Subsequent Events
 On February 13, 2024, the Company announced that it entered into an agreement to acquire Adimec Holding B.V. and its subsidiaries ("Adimec"). Adimec, founded in 1992 and headquartered in Eindhoven, Netherlands, develops customized high-performance industrial and scientific cameras. The closing of the transaction, which is subject to customary conditions and approvals, is anticipated to occur in the first half of 2024. Adimec will be part of the Digital Imaging segment.

 Schedule II VALUATION AND QUALIFYING ACCOUNTS
 Schedule II
 VALUATION AND QUALIFYING ACCOUNTS
 For the Fiscal Years Ended December 31, 2023, January 1, 2023 and January 2, 2022

 Additions

 Description
 Balance at
 beginning of
 period

 Charged
 to costs and
 expenses

 Acquisitions

 Deductions and
 other (a)

 Balance at end
 of period

 Fiscal Year 2023

 Allowance for doubtful accounts
 $
 11.7
 0.7
 —
 ( 0.9)
 $
 11.5

 Environmental reserves
 $
 5.8
 —
 —
 ( 0.4)
 $
 5.4

 Fiscal Year 2022

 Allowance for doubtful accounts
 $
 13.8
 1.6
 —
 ( 3.7)
 $
 11.7

 Environmental reserves
 $
 6.3
 0.2
 —
 ( 0.7)
 $
 5.8

 Fiscal Year 2021

 Allowance for doubtful accounts
 $
 12.3
 4.5
 —
 ( 3.0)
 $
 13.8

 Environmental reserves
 $
 6.5
 0.4
 —
 ( 0.6)
 $
 6.3

 (a) Represents payments except the amounts for allowance for doubtful accounts primarily represents uncollectible accounts written-off, net of recoveries.

 Item 16. Form 10-K Summary

 None.

 EXHIBIT INDEX

 Exhibit
No.
 Description

 2.1
 Separation and Distribution Agreement dated as of November 29, 1999 by and among Allegheny Teledyne Incorporated, TDY Holdings, LLC, Teledyne Industries, Inc. and Teledyne Technologies Incorporated (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K dated as of November 29, 1999 (File No. 1-15295))

 2.2
 Agreement and Plan of Merger, dated as of January 4, 2021, by and among Teledyne Technologies Incorporated, Firework Merger Sub I, Inc., Firework Merger Sub II, LLC and FLIR Systems, Inc. (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K dated January 2, 2021 File No. 1-15295))

 3.1
 Restated Certificate of Incorporation of Teledyne Technologies Incorporated (including Certificate of Designation of Series A Junior Participating Preferred Stock) (incorporated by reference to Exhibit 3.1 to the Company's Annual Report on Form 10-K for the year ended January 2, 2000 (File No. 1-15295))

 3.2
 Fourth Amended and Restated Bylaws of Teledyne Technologies Incorporated (incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K dated December 20, 2022 (File No. 1-15295))

 4.1
 Description of the Registrant's Securities (incorporated by reference to Exhibit 4.1 to the Company's Annual Report on Form 10-K for the fiscal year ended January 2, 2022 (File No. 1-15295))

 4.2
 Indenture, dated as of March 22, 2021, between Teledyne Technologies Incorporated and U.S. Bank National Association, as trustee. (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K dated March 17, 2021) (File No. 1-15295)

 4.3
 First Supplemental Indenture, dated as of March 22, 2021, between Teledyne Technologies Incorporated and U.S. Bank National Association, as trustee. (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K dated March 17, 2021) (File No. 1-15295)

 4.4
 Form of 0.950% Notes due 2024 (form included as Exhibit B to the First Supplemental Indenture files as Exhibit 4.3)

 4.5
 Form of 1.600% Notes due 2026 (form included as Exhibit C to the First Supplemental Indenture files as Exhibit 4.3)

 4.6
 Form of 2.250% Notes due 2028 (form included as Exhibit D to the First Supplemental Indenture filed as Exhibit 4.3)

 4.7
 Form of 2.750% Notes due 2031 (form included as Exhibit E to the First Supplemental Indenture filed as Exhibit 4.3)

 10.1
 Employee Benefits Agreement between Allegheny Teledyne Incorporated and Teledyne Technologies Incorporated (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K/A (Amendment No. 1) dated as of November 29, 1999 (File No. 1-15295))

 10.2
 Teledyne Technologies Incorporated Amended and Restated 2008 Incentive Award Plan (incorporated by reference to Annex A of the Company's Definitive Proxy Statement filed March 8, 2012 (File No. 1-15295))

 10.3
 Administrative Rules of the Teledyne Technologies Incorporated Amended and Restated 2008 Incentive Award Plan Related to Non-Employee Director Stock Compensation (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended April 1, 2012 (File No. 1-15295))

 10.4
 Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Annex A of the Company's Definitive Proxy Statement filed March 5, 2014 (File No. 1-15295))

 10.5
 Form of stock option agreement and conditions under the Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated April 23, 2014 File No. 1-15295))

 10.6
 Administrative Rules of the Teledyne Technologies Incorporated 2014 Incentive Plan Related to Non-Employee Director Stock Compensation (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K dated April 23, 2014 (File No. 1-15295))

 10.7
 Administrative Rules of the 2014 Incentive Award Plan Related to Non-Employee Director Restricted Stock Unit Awards and Fees (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K dated December 31, 2014 (File No. 1-15295))

 10.8
 Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Annex A of the Company's Definitive Proxy Statement filed March 10, 2017)

 10.9
 Standing resolutions of the Nominating and Governance Committee related to non-employee director compensation (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated April 26, 2017).

 10.10
 Administrative Rules of the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan Related to Non-Employee Director Restricted Stock Unit Awards and Fees (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K dated April 26, 2017).

 10.11
 Administrative Rules for the Restricted Stock Award Program under the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated January 23, 2018)

 10.12
 Form of Restricted Stock Award Agreement under the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan for awards made prior to 2024 (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated January 23, 2018)

 10.13
 Form of Stock Option Award Agreement under the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K dated January 23, 2018)

 10.14
 Terms and Conditions of Stock Option Award Agreement under the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan for grants made after 2018 to Robert Mehrabian (incorporated by reference to Exhibit 10.17 to the Company's Annual Report on Form 10-K for the fiscal year ended December 29, 2019 File No. 1-15295))

 10.15
 Summary Plan Description for the Performance Share Plan 2018-2020 Cycle under the Amended and Restated Teledyne Technologies Incorporated 2014 Incentive Award Plan (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K dated January 23, 2018)

 10.16
 Performance Plan Summary Plan Description for awards made prior to 2024 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated January 26, 2021 File No. 1-15295))

 10.17
 Form of Performance-Based Restricted Stock Unit Agreement for awards made after January 1, 2024 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated January 23, 2024 File No. 1-15295)

 10.18
 Performance Plan - Summary Plan Description for awards made after January1, 2024 (incorporated by reference to Exhibit 10.2 to the Company Report on Form 8-K dated January23, 2024 File No. 1-15295)

 10.19
 Eighth Amended and Restated Employment Agreement, dated as of October 24, 2023, by and between Teledyne Technologies Incorporated and Robert Mehrabian (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated October 24, 2023 File No. 1-15295)

 10.20
 Transition of Employment and Agreement Termination Employment Agreement between Teledyne Netherlands BV and Edwin Roks, dated December 29, 2023*

 10.21
 Amended and Restated Change in Control Severance Agreement, dated as of January 31, 2011, by and between Teledyne Technologies Incorporated and Robert Mehrabian (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated January 31, 2011 (File No. 1-15295))

 10.22
 Amended and Restated change in Control Severance Agreement dated January 31, 2011, by and between Teledyne Technologies Incorporated and Susan L. Main (incorporated by reference to Exhibit 10.12 to Company's Annual Report on Form 10-K for the fiscal years ended December 29, 2013 (File No. 1-15295))

 10.23
 Amended and Restated Change in Control Severance Agreement, dated as of January 31, 2011, by and between Teledyne Technologies Incorporated and Jason Vanwees (incorporated by reference to Exhibit 10.39 to the Company's Annual Report on Form 10-K for the fiscal year end January 3, 2016(File No. 1-15295)

 10.24
 Change in Control Severance Agreement, dated as of September 1, 2012, by and among Teledyne Technologies Incorporated and George C. Bobb III (incorporated by reference to Exhibit 10.4 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended April 2, 2023 File No. 1-15295)

 10.25
 Amended and Restated Change in Control Severance Agreement, dated as of January31, 2011, by and between Teledyne Technologies Incorporated and Edwin Roks (incorporated by reference to Exhibit 10.40 to the Company ' s Annual Report on Form 10-K for the fiscal year end December 30, 2018 (File No. 1-15295))

 10.26
 Amended and Restated Change in Control Severance Agreement, dated as of January 31, 2011, by and between Teledyne Technologies Incorporated and Stephen F. Blackwood*

 10.27
 Teledyne Technologies Incorporated Pension Equalization/Benefit Restoration Plan, as originally effective as of November 29, 1999, as amended and restated effective December 31, 2004 (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated December 31, 2008 (File No. 1-15295))

 10.28
 Teledyne Technologies Pension Equalization/Benefit Restoration Plan - Resolutions of the Plan Administration Committee (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated December 31, 2014 (File No. 1-15295))

 10.29
 Amended and Restated Credit Agreement dated as of March 4, 2021, by and among Teledyne Technologies Incorporated, as a borrower and guarantor, the designated borrowers party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, swing line lender and L/C issuer (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated March 2, 2021) (File No. 1-15295)

 10.30
 First Amendment to Amended and Restated Credit Agreement, dated as of October 26, 2021, by and among Teledyne Technologies Incorporated, as a borrower and guarantor, the designated borrowers party thereto, the guarantor party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, swing line lender and L/C issuer (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q dated October 3, 2021) (File No. 1-15295)

 10.31
 Second Amendment to Amended and Restated Credit Agreement, dated as of April 26, 2023, by and among Teledyne Technologies Incorporated, as a borrower and guarantor, the designated borrowers party thereto, the guarantor party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, swing line lender and L/C issuer (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended April 2, 2023 File No. 1-15295)

 10.32
 Joinder Agreement of Teledyne FLIR, LLC, dated as of May 14, 2021, to Amended and Restated Credit Agreement dated as of March 4, 2021, by and among Teledyne Technologies Incorporated, as a borrower and guarantor, the designated borrowers party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, swing line lender and L/C issuer (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K dated May 14, 2021) (File No. 1-15295)

 10.33
 Amended and Restated Term Loan Credit Agreement, dated October 30, 2019, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the several banks and other financial institutions form time to time parties thereto as lenders, Bank of America, N.A., as administrative agent, and B of A Securities, Inc., as sole book manager and sole lead arranger (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated October 30, 2019).

 10.34
 First Amendment to Amended and Restated Term Loan Credit Agreement dated as of January 19, 2021, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the guarantors party thereto, the several banks and other financial institutions from time to time parties thereto as lenders and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated January 19, 2021 File No. 1-15295))

 10.35
 Second Amendment to Amended and Restated Term Loan Credit Agreement dated as of March 4, 2021, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the guarantors party thereto, the lenders party thereto and Bank of America, N.A. as administrative agent (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K dated March 2, 2021) (File No. 1-15295)

 10.36
 Third Amendment to Amended and Restated Term Loan Credit Agreement, dated as of October 26, 2021, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the guarantor party thereto and Bank of America, N.A. as administrative agent (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q dated October 3, 2021) (File No. 1-15295)

 10.37
 Fourth Amendment to Amended and Restated Term Loan Credit Agreement, dated as of April 26, 2023, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the guarantor party thereto and Bank of America, N.A. as administrative agent (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended April 2, 2023 File No. 1-15295)

 10.38
 Joinder Agreement of Teledyne FLIR, LLC, dated as of May 14, 2021, to Amended and Restated Term Loan Credit Agreement dated as of October 30, 2019, by and among Teledyne Technologies Incorporated and Teledyne Netherlands BV, as borrowers, the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.5 to the Company's Current Report on Form 8-K dated May 14, 2021) (File No. 1-15295)

 10.39
 Term Loan Credit Agreement dated as of March 4, 2021, by and among Teledyne Technologies Incorporated, as borrower, the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated March 2, 2021) (File No. 1-15295)

 10.40
 First Amendment to the Term Loan Credit Agreement, dated as of April 26, 2023, by and among Teledyne Technologies Incorporated, as borrower, the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended April 2, 2023 File No. 1-15295)

 10.41
 Joinder Agreement of Teledyne FLIR, LLC, dated as of May 14, 2021, to Term Loan Credit Agreement dated as of March 4, 2021, by and among Teledyne Technologies Incorporated, as borrower, the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K dated May 14, 2021) (File No. 1-15295)

 10.42
 Second Supplemental Indenture, dated as of May 14, 2021, between Teledyne Technologies Incorporated, Teledyne FLIR, LLC and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated May 14, 2021) (File No. 1-15295)

 10.43
 Second Supplemental Indenture, dated as of May 14, 2021 between Teledyne FLIR, LLC and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K dated May 14, 2021) (File No. 1-15295)

 10.44
 Form of Indemnification Agreement executed by each of the Company's directors and named executive officers (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated April 22, 2009 (File No. 1-15295))

 14.1
 Teledyne Technologies Incorporated Global Code of Ethical Conduct - this code of ethics may be accessed via the Company's website at www.teledyne.com/who-we-are/ethics

 14.2
 Code of Ethics for Financial Professionals - this code of ethics may be accessed via the Company's website at www.teledyne.com/who-we-are/ethics

 14.3
 Directors, Code of Business Conduct and Ethics - this code of ethics may be accessed via the Company's website at www.teledyne.com/who-we-are/ethics

 Subsidiaries of Teledyne Technologies Incorporated*

 23.1
 Consent of Deloitte & Touche LLP, Independent Registered Public Accounting Firm *

 24.1
 Power of Attorney - Directors*

 31.1
 Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002*

 31.2
 Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002*

 32.1
 Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002*

 32.2
 Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002*

 97.1
 Teledyne Technologies Incorporated Compensation Recoupment Policy*

 101.INS

 101.SCH

 101.CAL

 101.DEF

 101.LAB

 101.PRE

 *
 Submitted electronically herewith.

 **

 Denotes management contract or compensatory plan or arrangement required to be filed as an Exhibit to this Form 10-K.

 SIGNATURES
 Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized as of February 23, 2024.

 Teledyne Technologies Incorporated (Registrant)

 By:

 /s/ Edwin Roks

 Edwin Roks

 Chief Executive Officer

 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

 /s/ Edwin Roks
 Chief Executive Officer

 Edwin Roks
 (Principal Executive Officer)

 /s/ Stephen F. Blackwood
 Senior Vice President and

 Stephen F. Blackwood

 Chief Financial Officer
(Principal Financial Officer)

 /s/ Cynthia Belak
 Vice President and Controller

 Cynthia Belak
 (Principal Accounting Officer)

 /s/ Robert Mehrabian
 Executive Chairman and Director

 Robert Mehrabian

 *

 Charles Crocker

 *

 Kenneth C. Dahlberg

 *

 Michelle A. Kumbier

 *

 Simon M. Lorne

 *

 Robert A. Malone

 *

 Vincent J. Morales

 *

 Jane C. Sherburne

 *

 Denise R. Singleton

 *

 Michael T. Smith

 *

 Wesley W. von Schack

 *By:
 /s/ Melanie S. Cibik

 Melanie S. Cibik
Pursuant to Power of Attorney
filed as Exhibit 24.1