UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

 Washington, D.C. 20549

 FORM 10-K

 (Mark One)

 x 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

 o 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 of the issuing entity: 333-227081-06

 Central Index Key Number of the issuing entity:
0001832873

 CSAIL 2021-C20 Commercial Mortgage
Trust

 (exact name of the issuing entity as specified in its
charter)

 Central Index Key Number of the depositor: 0001654060

 Credit Suisse Commercial Mortgage
Securities Corp.

 (exact name of the depositor as specified in its
charter)

 Central Index Key Number of the sponsor: 0001628601

 Column Financial, Inc.

 (exact name of the sponsor as specified in its charter)

 Central Index Key Number of the sponsor: 0001767304

 3650 REIT Loan Funding 1 LLC

 (exact name of the sponsor as specified in its charter)

 Central Index Key Number of the sponsor: 0001685185

 UBS AG, acting through its branch located
at 1285 Avenue of the Americas, New York, New York

 (exact name of the sponsor as specified in its charter)

 Central Index Key Number of the sponsor: 0001541294

 German American Capital Corporation

 (exact name of the sponsor as specified in its charter)

 New York

 (State or other jurisdiction of

 incorporation or organization of

 the issuing entity)

 35-7287108

 38-4169430

 38-4169431

 (I.R.S. Employer

 Identification Numbers)

c/o Computershare Trust Company, National Association, as agent for

 Wells Fargo Bank, National Association

 as Certificate Administrator

 9062 Old Annapolis Road

 Columbia, MD

 (Address of principal
executive offices of the issuing entity)

 21045

 (Zip Code)

 Registrant's telephone number,
including area code:

 (212) 272-6858

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

 Title of each class

 Trading Symbol(s)

 Name of each exchange on which registered

 None

 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. o 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. o 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 o 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 (Section 232.405 of this chapter) during the
preceding 12 months (or for such shorter period that the registrant was
required to submit such files).

 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 o
Accelerated
filer
o

 Non-accelerated
filer

Smaller reporting company
o

Emerging growth
company
o

 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 to
Section 13(a) of the Exchange Act. o

 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. o

 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. o

 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). o

 Indicate by check mark whether the registrant is a shell
company (as defined in Rule 12b-2 of the Act). o Yes No

 State the aggregate market value of the voting and non-voting
common equity held by non-affiliates computed by reference to the price at
which the common equity was last sold, or the average bid and asked price of
such common equity, as of the last business day of the registrant's most
recently completed second fiscal quarter.

 Indicate by check mark whether the registrant has filed all
documents and reports required to be filed by Section 12, 13 or 15(d) of the
Securities Exchange Act of 1934 subsequent to the distribution of securities
under a plan confirmed by a court. o
Yes o
No

 Indicate the number of shares outstanding of each of the
registrant's classes of common stock, as of the latest practicable date.

 DOCUMENTS INCORPORATED BY REFERENCE

 List hereunder the following documents if incorporated by
reference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) into
which the document is incorporated: (1) Any annual report to security holders;
(2) Any proxy or information statement; and (3) Any prospectus filed pursuant
to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents
should be clearly described for identification purposes (e.g., annual report to
security holders for fiscal year ended December 24, 1980).

 Not
applicable.

 EXPLANATORY NOTES

Exhibit Index) with respect to the 888 Figueroa Mortgage Loan, which
constituted approximately 6.2% of the asset pool of the issuing entity as of
its cut-off date. The 888 Figueroa Mortgage Loan is an asset of the
issuing entity and is part of a loan combination that includes the 888 Figueroa
Mortgage Loan and one other pari passu loan, which is not an asset of
the issuing entity. The other pari passu portion of the loan combination
was securitized in the CD 2019-CD8 Mortgage Trust transaction, Commission File
Number 333-226943-03 (the " CD 2019-CD8 Transaction "). This loan
combination, including the 888 Figueroa Mortgage Loan, is being serviced and
administered pursuant to the pooling and servicing agreement for the CD
2019-CD8 Transaction, which is incorporated by reference as Exhibit 4.2 to this
Annual Report on Form 10-K.

Exhibit Index) with respect to The Westchester Mortgage Loan, which constituted
approximately 5.4% of the asset pool of the issuing entity as of its cut-off
date. The Westchester Mortgage Loan is an asset of the issuing entity and
is part of a loan combination that includes The Westchester Mortgage Loan, five
other pari passu loans and one subordinate companion loan, which are not
assets of the issuing entity. A pari passu portion of the loan
combination was securitized in the CSMC 2020-WEST transaction (the " CSMC
2020-WEST Transaction "). This loan combination, including The Westchester Mortgage
Loan, is being serviced and administered pursuant to the trust and servicing
agreement for the CSMC 2020-WEST Transaction, which is incorporated by
reference as Exhibit 4.3 to this Annual Report on Form 10-K.

Exhibit Index) with respect to the MGM Grand & Mandalay Bay Mortgage Loan,
which constituted approximately 6.0% of the asset pool of the issuing entity as
of its cut-off date. The MGM Grand & Mandalay Bay Mortgage Loan is an
asset of the issuing entity and is part of a loan combination that includes the
MGM Grand & Mandalay Bay Mortgage Loan, forty-eight other pari passu
loans and twenty-four subordinate companion loans, which are not assets of the
issuing entity. A pari passu portion of the loan combination was
securitized in the BX Commercial Mortgage Trust 2020-VIVA transaction (the " BX
2020-VIVA Transaction "). This loan combination, including the MGM Grand
& Mandalay Bay Mortgage Loan, is being serviced and administered pursuant
to the trust and servicing agreement for the BX 2020-VIVA Transaction, which is
incorporated by reference as Exhibit 4.4 to this Annual Report on Form 10-K.

Exhibit Index) with respect to The Grace Building Mortgage Loan, which
constituted approximately 9.2% of the asset pool of the issuing entity as of
its cut-off date. The Grace Building Mortgage Loan is an asset of the
issuing entity and is part of a loan combination that includes The Grace
Building Mortgage Loan, eighteen other pari passu loans and four
subordinate companion loans, which are not assets of the issuing entity. A pari
passu portion of the loan combination was securitized in the Grace Trust
2020-GRCE transaction (the " Grace Trust 2020-GRCE Transaction "). This
loan combination, including The Grace Building Mortgage Loan, is being serviced
and administered pursuant to the trust and servicing agreement for the Grace
Trust 2020-GRCE Transaction, which is incorporated by reference as Exhibit 4.5
to this Annual Report on Form 10-K.

Exhibit Index) with respect to the Miami Design District Mortgage Loan, which
constituted approximately 9.2% of the asset pool of the issuing entity as of
its cut-off date. The Miami Design District Mortgage Loan is an asset of
the issuing entity and is part of a loan combination that includes the Miami
Design District Mortgage Loan, twelve other pari passu loans and one
subordinate companion loan, which are not assets of the issuing entity. This
loan combination, including the Miami Design District Mortgage Loan, was
serviced under the pooling and servicing agreement for the BANK 2020-BNK30
Transaction prior to the closing of the securitization of a pari passu portion
of the Miami Design District loan combination in the BANK 2021-BNK33
transaction, Commission File Number 333-228375-06 (the " BANK 2021-BNK33
Transaction "). After the closing of the BANK 2021-BNK33 Transaction
on May 20, 2021, this loan combination, including the Miami Design District
Mortgage Loan was, and will continue to be, serviced and administered pursuant
to the pooling and servicing agreement with respect to the BANK 2021-BNK33
Transaction, which is incorporated by reference as Exhibit 4.6 to this Annual
Report on Form 10-K.

 The master servicer of a pooling
and servicing agreement or trust and servicing agreement also functions as the
primary servicer of the related mortgage loans serviced and administered
pursuant to such agreement unless a separate primary servicer is identified
herein. If this report does not identify a separate primary servicer, the
servicer compliance statement provided by the master servicer under any such
agreement also encompasses its responsibilities as primary servicer of the
related mortgage loan or mortgage loans.

 Midland Loan Services, a Division of
PNC Bank, National Association is the master servicer of the mortgage loans
serviced under the Pooling and Servicing Agreement and the primary servicer and
special servicer of The Westchester Mortgage Loan. As a result, Midland Loan
Services, a Division of PNC Bank, National Association is a "servicer" as
defined in Item 1108(a)(2)(iii) of Regulation AB, in the capacities described
above, because it is servicing mortgage loans that constituted 10% or more of
the assets of the issuing entity as of its cut-off date. The assessments of
compliance with applicable servicing criteria, accountants' attestation reports
and servicer compliance statements delivered by Midland Loan Services, a
Division of PNC Bank, National Association in the capacities described above
are listed in the Exhibit Index.

 Wells Fargo Bank, National
Association is the certificate administrator of the mortgage loans serviced
under the Pooling and Servicing Agreement and the primary servicer of the Miami
Design District Mortgage Loan and The Grace Building Mortgage Loan. As a
result, Wells Fargo Bank, National Association is a "servicer" as defined in
Item 1108(a)(2)(iii) of Regulation AB, in the capacities described above,
because it is servicing mortgage loans that constituted 10% or more of the
assets of the issuing entity as of its cut-off date. The assessments of
compliance with applicable servicing criteria, accountants' attestation reports
and servicer compliance statements delivered by Wells Fargo Bank, National
Association in the capacities described above are listed in the Exhibit Index.

 Situs Holdings, LLC is the special
servicer of The Grace Building Mortgage Loan and the MGM Grand & Mandalay
Bay Mortgage Loan. As a result, Situs Holdings, LLC is a "servicer" as defined
in Item 1108(a)(2)(iii) of Regulation AB, in the capacities described above,
because it is servicing mortgage loans that constituted 10% or more of the
assets of the issuing entity as of its cut-off date. The assessments of
compliance with applicable servicing criteria, accountants' attestation reports
and servicer compliance statements delivered by Situs Holdings, LLC in the
capacities described above are listed in the Exhibit Index.

 Wells Fargo Bank, National
Association acts as trustee of the mortgage loans serviced under the Pooling
and Servicing Agreement, the 888 Figueroa Mortgage Loan and The Westchester
Mortgage Loan. Pursuant to the Pooling and Servicing Agreement, the
pooling and servicing agreement for the CD 2019-CD8 Transaction and the trust
and servicing agreement for the CSMC 2020-WEST Transaction, the trustee is
required to provide an assessment of compliance with applicable servicing
criteria solely with respect to Item 1122(d)(2)(iii) of Regulation AB
(regarding advances of funds or guarantees regarding collections, cash flows or
distributions, and any interest or other fees charged for such advances, are
made, reviewed and approved as specified in the transaction agreements).
However, during the reporting period, the trustee did not perform any servicing
function with respect to the servicing criteria specified in Item
1122(d)(2)(iii) of Regulation AB. The master servicer or the special
servicer, to the extent required, performed the servicing function identified
with respect to Item 1122(d)(2)(iii) of Regulation AB, and each such party
included Item 1122(d)(2)(iii) of Regulation AB in the assessment of compliance
with applicable servicing criteria and accountant's attestation report for the
subject transaction. As a result, this Annual Report on Form 10-K does
not include an assessment of compliance with applicable servicing criteria of
the trustee. One or more other servicers of the mortgage loans serviced under
the Pooling and Servicing Agreement, the 888 Figueroa Mortgage Loan and The
Westchester Mortgage Loan have delivered one or more assessments of compliance
with respect to Item 1122(d)(2)(iii) of Regulation AB.

 Wilmington Trust, National
Association acts as trustee of the MGM Grand & Mandalay Bay Mortgage Loan,
The Grace Building Mortgage Loan and the Miami Design District Mortgage
Loan. Pursuant to the trust and servicing agreement for the BX 2020-VIVA
Transaction, the trust and servicing agreement for the Grace Trust 2020-GRCE
Transaction and the pooling and servicing agreement for the BANK 2021-BNK33
Transaction, the trustee is required to provide an assessment of compliance
with applicable servicing criteria solely with respect to Item 1122(d)(2)(iii)
of Regulation AB (regarding advances of funds or guarantees regarding
collections, cash flows or distributions, and any interest or other fees
charged for such advances, are made, reviewed and approved as specified in the
transaction agreements). However, during the reporting period, the trustee did
not perform any servicing function with respect to the servicing criteria
specified in Item 1122(d)(2)(iii) of Regulation AB. The master servicer
or the special servicer, to the extent required, performed the servicing
function identified with respect to Item 1122(d)(2)(iii) of Regulation AB, and
each such party included Item 1122(d)(2)(iii) of Regulation AB in the
assessment of compliance with applicable servicing criteria and accountant's
attestation report for the subject transaction. As a result, this Annual
Report on Form 10-K does not include an assessment of compliance with
applicable servicing criteria of the trustee. One or more other servicers of
the MGM Grand & Mandalay Bay Mortgage Loan, The Grace Building Mortgage
Loan and the Miami Design District Mortgage Loan have delivered one or more
assessments of compliance with respect to Item 1122(d)(2)(iii) of Regulation
AB.

 This Annual Report on Form 10-K
includes an assessment of compliance with applicable servicing criteria and an
accountant's attestation report from U.S. Bank National Association. This
entity was engaged by Citibank, N.A., as custodian of the MGM Grand &
Mandalay Bay Mortgage Loan, to perform certain custodial services. These
custodial services are servicing functions included within the servicing
criteria set forth in Items 1122(d)(4)(i) and 1122(d)(4)(ii) of Regulation AB.
Therefore, under the principles-based definition of "servicer" set forth in
Item 1101(j) or Regulation AB that looks to the functions that an entity
performs, this vendor is a "servicer" for the purposes of Item 1122 of
Regulation AB. See Compliance and Disclosure Interpretations, Section 301.01
(Item 1101(j)).

 This Annual Report on Form 10-K
includes assessments of compliance with applicable servicing criteria and
accountants' attestation reports from CoreLogic Solutions, LLC. This
entity was engaged by the primary servicer of The Grace Building Mortgage Loan
and the Miami Design District Mortgage Loan to remit tax payments received from
the escrow accounts of borrowers to local taxing authorities, to report tax
amounts due, to verify tax parcel information, and to verify non-escrow tax
payments. These servicing functions are included within the servicing criteria
set forth in Items 1122(d)(4)(xi) and 1122(d)(4)(xii) of Regulation AB.
Therefore, under the principles-based definition of "servicer" set forth in
Item 1101(j) of Regulation AB that looks to the functions that an entity
performs, this vendor is a "servicer" for the purposes of Item 1122 of
Regulation AB. See Compliance and Disclosure Interpretations,
Section 301.01 (Item 1101(j)).

 This Annual
Report on Form 10-K includes an assessment of compliance with applicable
servicing criteria, accountants' attestation report and servicer compliance
statement from Computershare Trust Company, National Association (" CTCNA ").
CTCNA was engaged by Wells Fargo Bank, National Association (" Wells Fargo "),
in its capacity as certificate administrator and custodian, to perform certain
specified servicing functions identified in the assessment of compliance with
applicable servicing criteria and accountants' attestation reports. Wells
Fargo engaged CTCNA in connection with the sale of Wells Fargo's corporate
trust services business to CTCNA and its affiliates. Further, under the
principles-based definition of "servicer" set forth in Item 1101(j) of
Regulation AB that looks to the functions that an entity performs, this party
is a "servicer" for the purposes of Item 1123 of Regulation AB. See
Compliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).

 The assessments of compliance with
applicable servicing criteria, accountants' attestation reports and servicer
compliance statements of the certificate administrator of the 888 Figueroa
Mortgage Loan, The Westchester Mortgage Loan, The Grace Building Mortgage Loan,
the Miami Design District Mortgage Loan and the MGM Grand & Mandalay Bay
Mortgage Loan are omitted from this Annual Report on Form 10-K as the
certificate administrator pursuant to the related pooling and servicing
agreement or trust and servicing agreement does not perform any activities that
address servicing criteria with respect to the issuing entity and because they
are each not a "servicer" that meets the criteria in Item 1108(a)(2)(i) through
(iii) of Regulation AB.

 With respect to the pari passu
loan combinations that include the 888 Figueroa Mortgage Loan, the MGM Grand
& Mandalay Bay Mortgage Loan and the Miami Design District Mortgage Loan, the servicer compliance statements of Principal
Real Estate Investors, LLC as primary servicer of the 888 Figueroa Mortgage
Loan, LNR Partners, LLC as special servicer of the 888 Figueroa Mortgage Loan,
KeyBank National Association as primary servicer of the MGM Grand &
Mandalay Bay Mortgage Loan and Rialto Capital Advisors, LLC as special servicer
of the Miami Design District Mortgage Loan, listed on the Exhibit Index are
omitted from this Annual Report on Form 10-K as they are not required by Item
1123 of Regulation AB to be included on this Annual Report on Form 10-K because
they are each an unaffiliated party that is not a "servicer" that meets the
criteria in Item 1108(a)(2)(i) through (iii) of Regulation AB.

 Item 1. Business.

 Item 1A. Risk Factors.

 Item 1B. Unresolved Staff Comments.

 None.

 Item 1C. Cybersecurity.

 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 Operations.

 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.

 None.

 Item 9C. Disclosure Regarding Foreign Jurisdictions
that Prevent Inspections.

 None.

 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.

 ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB

 Item 1112(b) of Regulation AB, Significant Obligor
Financial Information.

 No single obligor represents 10% or more of the pool assets
held by the issuing entity.

 Item 1114(b)(2) of Regulation AB, Significant Enhancement
Provider Financial Information.

 No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction as
described under Item 1114(a) of Regulation AB.

 Item 1115(b) of Regulation AB, Certain Derivatives
Instruments (Financial Information).

 No entity or group of affiliated entities provides any
derivative instruments or other support for the certificates within this
transaction as described under Item 1115 of Regulation AB.

 Item 1117 of Regulation AB, Legal Proceedings.

 The registrant knows of no material pending legal proceeding
involving the trust or any party related to the trust, other than routine
litigation incidental to the duties of those respective parties, and the
following, with respect to Wells Fargo Bank, National Association, as trustee,
as certificate administrator and as custodian.

 In December 2014, Phoenix Light SF Limited (Phoenix Light)
and certain related entities filed a complaint in the United States District
Court for the Southern District of New York alleging claims against Wells Fargo
Bank, N.A., in its capacity as trustee for a number of residential
mortgage-backed securities (RMBS) trusts. Complaints raising similar
allegations have been filed by Commerzbank AG in the Southern District of New
York, IKB International and IKB Deutsche Industriebank (together, IKB) in New
York state court, and Park Royal I LLC and Park Royal II LLC in New York state
court. In each case, the plaintiffs allege that Wells Fargo Bank, N.A., as
trustee, caused losses to investors, and plaintiffs assert causes of action
based upon, among other things, the trustee's alleged failure to notify and
enforce repurchase obligations of mortgage loan sellers for purported breaches
of representations and warranties, notify investors of alleged events of
default, and abide by appropriate standards of care following alleged events of
default. In July 2022, the district court dismissed Phoenix Light's claims and
certain of the claims asserted by Commerzbank AG, and subsequently entered
judgment in each case in favor of Wells Fargo Bank, N.A. In August 2022,
Phoenix Light and Commerzbank AG each appealed the district court's decision to
the United States Court of Appeals for the Second Circuit. Phoenix Light
dismissed its appeal in May 2023, terminating its case. In November 2023, Wells
Fargo Bank, N.A. entered into an agreement with IKB to resolve IKB's claims.
Wells Fargo Bank, N.A. previously settled two class actions filed by
institutional investors and an action filed by the National Credit Union
Administration with similar allegations.

 Item 1119 of Regulation AB, Affiliations and Certain
Relationships and Related Transactions.

 The information regarding this Item has been previously
provided in the prospectus of the Registrant relating to the issuing entity
filed on March 30, 2021 pursuant to Rule 424(b)(2).

 Item 1122 of Regulation AB, Compliance with Applicable
Servicing Criteria.

assessments of compliance with respect to the mortgage loans are attached
hereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit AA
to the Pooling and Servicing Agreement incorporated by reference as Exhibit 4.1
to this Annual Report on Form 10-K is a chart identifying the entities
participating in a servicing function for the transaction responsible for each
applicable servicing criteria set forth in Item 1122(d).

assessments of compliance with respect to the 888 Figueroa Mortgage Loan, which
is being serviced and administered pursuant to the pooling and servicing agreement
for the CD 2019-CD8 Transaction, are attached hereto under Item 15 to this
Annual Report on Form 10-K. Attached as Schedule II to the pooling and
servicing agreement for the CD 2019-CD8 Transaction incorporated by reference
as Exhibit 4.2 to this Annual Report on Form 10-K is a chart identifying the
entities participating in a servicing function for the CD 2019-CD8 Transaction
responsible for each applicable servicing criteria set forth in Item 1122(d).

assessments of compliance with respect to The Westchester Mortgage Loan, which
is being serviced and administered pursuant to the trust and servicing
agreement for the CSMC 2020-WEST Transaction, are attached hereto under Item 15
to this Annual Report on Form 10-K. Attached as Exhibit L to the trust and
servicing agreement for the CSMC 2020-WEST Transaction incorporated by
reference as Exhibit 4.3 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the CSMC
2020-WEST Transaction responsible for each applicable servicing criteria set
forth in Item 1122(d).

assessments of compliance with respect to the MGM Grand & Mandalay Bay
Mortgage Loan, which is being serviced and administered pursuant to the trust
and servicing agreement for the BX 2020-VIVA Transaction, are attached hereto
under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L to the
trust and servicing agreement for the BX 2020-VIVA Transaction incorporated by
reference as Exhibit 4.4 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the BX
2020-VIVA Transaction responsible for each applicable servicing criteria set
forth in Item 1122(d).

assessments of compliance with respect to The Grace Building Mortgage Loan,
which is being serviced and administered pursuant to the trust and servicing
agreement for the Grace Trust 2020-GRCE Transaction, are attached hereto under
Item 15 to this Annual Report on Form 10-K. Attached as Schedule I to the trust
and servicing agreement for the Grace Trust 2020-GRCE Transaction incorporated
by reference as Exhibit 4.5 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the Grace
Trust 2020-GRCE Transaction responsible for each applicable servicing criteria
set forth in Item 1122(d).

assessments of compliance with respect to the Miami Design District Mortgage
Loan, which is being serviced and administered pursuant to the pooling and servicing
agreement for the BANK 2021-BNK33 Transaction, are attached hereto under Item
15 to this Annual Report on Form 10-K. Attached as Exhibit Z to the pooling and
servicing agreement for the BANK 2021-BNK33 Transaction incorporated by
reference as Exhibit 4.6 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the BANK
2021-BNK33 Transaction responsible for each applicable servicing criteria set
forth in Item 1122(d).

 Item 1123 of Regulation AB, Servicer Compliance Statement.

 The servicer compliance statements are attached as Exhibits
to this Annual Report on Form 10-K.

 Item 15. Exhibit and Financial Statement Schedules

 (a) The following is a list of documents filed as part of
this Annual Report on Form 10-K:

 (1) Not applicable

 (2) Not applicable

 (3) See below

 4.1
 Pooling
and Servicing Agreement, dated as of March 1, 2021, by and among Credit Suisse
Commercial Mortgage Securities Corp., as Depositor, Midland Loan Services, a
Division of PNC Bank, National Association, as Master Servicer, 3650 REIT Loan
Servicing LLC, as Special Servicer, Wells Fargo Bank, National Association, as
Certificate Administrator and as Trustee, and Park Bridge Lender Services LLC,
as Operating Advisor and as Asset Representations Reviewer (filed as Exhibit
4.1 to the registrant's Current Report on Form 8-K filed on March 30, 2021
under Commission File No. 333-227081-06 and incorporated by reference herein).

 4.2
 Pooling
and Servicing Agreement, dated as of August 1, 2019, by and among Deutsche
Mortgage & Asset Receiving Corporation, as Depositor, Midland Loan
Services, a Division of PNC Bank, National Association, as Master Servicer,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer, Wells Fargo Bank, National Association, as Trustee, Wells Fargo Bank,
National Association, as Certificate Administrator, Paying Agent and Custodian,
and Park Bridge Lender Services LLC, as Operating Advisor and Asset
Representations Reviewer (filed as Exhibit 4.4 to the registrant's Current
Report on Form 8-K filed on March 30, 2021 under Commission File No.
333-227081-06 and incorporated by reference herein).

 4.3
 Trust
and Servicing Agreement, dated as of February 1, 2020, among Credit Suisse
Commercial Mortgage Securities Corp., as Depositor, Midland Loan Services, a
Division of PNC Bank, National Association, as Servicer, Pacific Life Insurance
Company, as Special Servicer, Wells Fargo Bank, National Association, as
Certificate Administrator, Wells Fargo Bank, National Association, as Trustee,
Wells Fargo Bank, National Association, as Custodian, and Pentalpha
Surveillance LLC, as Operating Advisor (filed as Exhibit 4.6 to the
registrant's Current Report on Form 8-K filed on March 30, 2021 under
Commission File No. 333-227081-06 and incorporated by reference herein).

 4.4
 Trust
and Servicing Agreement, dated as of May 5, 2020, by and among Citigroup
Commercial Mortgage Securities Inc., as Depositor, KeyBank National
Association, as Servicer, Situs Holdings, LLC, as Special Servicer, Wilmington
Trust, National Association, as Trustee, and Citibank, N.A., as Certificate
Administrator (filed as Exhibit 4.5 to the registrant's Current Report on Form
8-K filed on March 30, 2021 under Commission File No. 333-227081-06 and
incorporated by reference herein).

 4.5
 Trust
and Servicing Agreement, dated as of November 18, 2020, among Banc of America
Merrill Lynch Large Loan, Inc., as Depositor, Wells Fargo Bank, National
Association, as Servicer, Situs Holdings, LLC, as Special Servicer, Wilmington
Trust, National Association, as Trustee, Wells Fargo Bank, National
Association, as Certificate Administrator, as Paying Agent and as Custodian,
and Park Bridge Lender Services LLC, as Operating Advisor (filed as Exhibit 4.2
to the registrant's Current Report on Form 8-K filed on March 30, 2021 under
Commission File No. 333-227081-06 and incorporated by reference herein).

 4.6
 Pooling
and Servicing Agreement, dated as of May 1, 2021, by and among Banc of America
Merrill Lynch Commercial Mortgage Inc., as Depositor, Wells Fargo Bank,
National Association, as General Master Servicer, Rialto Capital Advisors, LLC,
as General Special Servicer, National Cooperative Bank, N.A., as NCB Master
Servicer and as NCB Special Servicer, Wells Fargo Bank, National Association,
as Certificate Administrator, Wilmington Trust, National Association, as
Trustee, and Park Bridge Lender Services LLC, as Operating Advisor and as Asset
Representations Reviewer (filed as Exhibit 4.1 to the registrant's Current
Report on Form 8-K filed on May 21, 2021 under Commission File No.
333-227081-06 and incorporated by reference herein).

 4.7
 Co-Lender
Agreement, dated as of November 18, 2020, by and among Bank of America,
National Association, as an Initial Note A Holder, JPMorgan Chase Bank,
National Association, as an Initial Note A Holder, Column Financial, Inc., as
an Initial Note A Holder, DBR Investments Co. Limited, as an Initial Note A
Holder, Bank of America, National Association, as Initial Note B-1 Holder,
JPMorgan Chase Bank, National Association, as Initial Note B-2 Holder, Column
Financial, Inc., as Initial Note B-3 Holder and DBR Investments Co. Limited, as
Initial Note B-4 Holder (filed as Exhibit 4.7 to the registrant's Current
Report on Form 8-K filed on March 30, 2021 under Commission File No.
333-227081-06 and incorporated by reference herein).

 4.8
 Amended
and Restated Agreement Between Noteholders, dated as of May 18, 2021, by and
among Bank of America, N.A., as Note A-1 Holder, Bank of America, N.A., as Note
A-12 Holder, Bank of America, N.A., as Note A-14 Holder, Bank of America, N.A.,
as Note A-15 Holder, Wilmington Trust, National Association, as Trustee for the
Benefit of the Registered Holders of BANK 2020-BNK30, Commercial Mortgage
Pass-Through Certificates, Series 2020-BNK30, as Note A-3 Holder and as Note
A-6 Holder, Wilmington Trust, National Association, as Trustee for the Benefit
of the Registered Holders of BANK 2021-BNK31, Commercial Mortgage Pass-Through
Certificates, Series 2021-BNK31, as Note A-2 Holder and as Note A-7 Holder,
Wilmington Trust, National Association, as Trustee for the Benefit of the
Registered Holders of BANK 2021-BNK32, Commercial Mortgage Pass-Through
Certificates, Series 2021-BNK32, as Note A-4 Holder, as Note A-8 Holder, as
Note A-10 Holder and as Note A-11 Holder, Wells Fargo Bank, National
Association, as Trustee on Behalf of the Registered Holders of CSAIL 2021-C20
Commercial Mortgage Pass-Through Certificates, Series 2021-C20, as Note A-5
Holder, as Note A-9 Holder, and as Note A-13 Holder, and CF MDD Holdings LLC,
as Note B Holder (filed as Exhibit 4.2 to the registrant's Current Report on
Form 8-K filed on May 21, 2021 under Commission File No. 333-227081-06 and
incorporated by reference herein).

 4.9
 Co-Lender
Agreement, dated as of July 18, 2019, by and between MUFG Union Bank, N.A, a
national banking association, d/b/a MUFG Principal Commercial Capital, as
Initial Note A-1 Holder, MUFG Union Bank, N.A, a national banking association,
d/b/a MUFG Principal Commercial Capital, as Initial Note A-2 Holder, and MUFG
Union Bank, N.A, a national banking association, d/b/a MUFG Principal
Commercial Capital, as Initial Note A-3 Holder (filed as Exhibit 4.9 to the
registrant's Current Report on Form 8-K filed on March 30, 2021 under
Commission File No. 333-227081-06 and incorporated by reference herein).

 4.10
 Amended
and Restated Agreement Between Noteholders, dated as of July 23, 2020, by and
among Citi Real Estate Funding Inc., as Initial Noteholder of Note A-5, Note
A-9, Note B-5-A, Note B-9-A and Note B-5-B, Barclays Capital Real Estate Inc.,
as Initial Noteholder of Note A-6, Note B-6-A and Note B-6-B, German American
Capital Corporation, as Initial Noteholder of Note A-7, B-7-A and Note B-7-B,
Societe Generale Financial Corporation, as Initial Noteholder of Note A-8, Note
A-12, Note B-8-A, B-12-A and Note B-8-B, Barclays Bank PLC, as Initial
Noteholder of Note A-10 and Note B-10-A, Deutsche Bank AG, New York Branch, as
Initial Noteholder of Note A-11 and Note B-11-A, Wilmington Trust, National
Association, as trustee on behalf of the registered holders of the BX
Commercial Mortgage Trust 2020-VIVA, Commercial Mortgage Pass-Through
Certificates, Series 2020-VIVA, as Initial Noteholder of Note A-1, Note A-2,
Note A-3, Note A-4, Note B-1-A, Note B-2-A, Note B-3-A, Note B-4-A, Note B-1-B,
Note B-2-B, Note B-3-B, Note B-4-B, Note C-1, Note C-2, Note C-3 and Note C-4,
and Citibank, N.A., as Initial Agent (filed as Exhibit 4.10 to the registrant's
Current Report on Form 8-K filed on March 30, 2021 under Commission File No.
333-227081-06 and incorporated by reference herein).

 4.11
 Co-Lender
Agreement, dated as of February 12, 2020, by and between Column Financial,
Inc., as Initial Note A-1 Holder, Column Financial, Inc., as Initial Note A-2
Holder, Column Financial, Inc., as Initial Note A-3 Holder, and Column
Financial, Inc., as Initial Note B Holder (filed as Exhibit 4.11 to the
registrant's Current Report on Form 8-K filed on March 30, 2021 under
Commission File No. 333-227081-06 and incorporated by reference herein).

 Rule 13a-14(d)/15d-14(d) Certifications.

Reports on assessment of compliance with servicing criteria for asset-backed
securities.

 33.1
National Association, as Master Servicer

 33.2
 3650 REIT Loan Servicing LLC, as Special Servicer

 33.3
 Wells Fargo Bank, National Association, as Trustee
and Certificate Administrator

 33.4
Custodian

 33.5
Advisor

 33.6
as Servicing Function Participant for the Certificate Administrator

 33.7
as Servicing Function Participant for the Custodian

 33.8
 Principal Real Estate Investors, LLC, as Primary
Servicer of the 888 Figueroa Mortgage Loan

 33.9
 LNR Partners, LLC, as Special Servicer of the 888 Figueroa
Mortgage Loan

 33.10
Wells Fargo Bank, National Association, as Trustee of the 888 Figueroa Mortgage
Loan (Omitted. See Explanatory Notes.)

 33.11
Custodian of the 888 Figueroa Mortgage Loan (see Exhibit 33.4)

 33.12
Advisor of the 888 Figueroa Mortgage Loan (see Exhibit 33.5)

 33.13
as Servicing Function Participant for the Custodian (see Exhibit 33.7)

 33.14
National Association, as Primary Servicer of The Westchester Mortgage Loan (see
Exhibit 33.1)

 33.15
National Association, as Special Servicer of The Westchester Mortgage Loan (see
Exhibit 33.1)

 33.16
Wells Fargo Bank, National Association, as Trustee of The Westchester Mortgage
Loan (Omitted. See Explanatory Notes.)

 33.17
Custodian of The Westchester Mortgage Loan (see Exhibit 33.4)

 33.18
 Pentalpha Surveillance LLC, as Operating Advisor
of The Westchester Mortgage Loan

 33.19
as Servicing Function Participant for the Custodian (see Exhibit 33.7)

 33.20
 KeyBank National Association, as Primary Servicer
of the MGM Grand & Mandalay Bay Mortgage Loan

 33.21
 Situs Holdings, LLC, as Special Servicer of the
MGM Grand & Mandalay Bay Mortgage Loan

 33.22
Wilmington Trust, National Association, as Trustee of the MGM Grand & Mandalay
Bay Mortgage Loan (Omitted. See Explanatory Notes.)

 33.23
 Citibank, N.A., as Custodian of the MGM Grand
& Mandalay Bay Mortgage Loan

 33.24
 U.S. Bank National Association, as Servicing
Function Participant of the MGM Grand & Mandalay Bay Mortgage Loan

 33.25
Servicer of The Grace Building Mortgage Loan

 33.26
 Situs Holdings, LLC, as Special Servicer of The
Grace Building Mortgage Loan (see Exhibit 33.21)

 33.27
Wilmington Trust, National Association, as Trustee of The Grace Building

 33.28
Custodian of The Grace Building Mortgage Loan (see Exhibit 33.4)

 33.29
Advisor of The Grace Building Mortgage Loan (see Exhibit 33.5)

 33.30
 CoreLogic Solutions, LLC, as Servicing Function
Participant of The Grace Building Mortgage Loan

 33.31
as Servicing Function Participant for the Custodian (see Exhibit 33.7)

 33.32
Servicer of the Miami Design District Mortgage Loan (see Exhibit 33.25)

 33.33
 Rialto Capital Advisors, LLC, as Special Servicer
of the Miami Design District Mortgage Loan

 33.34
Wilmington Trust, National Association, as Trustee of the Miami Design District

 33.35
Custodian of the Miami Design District Mortgage Loan (see Exhibit 33.4)

 33.36
Advisor of the Miami Design District Mortgage Loan (see Exhibit 33.5)

 33.37
 CoreLogic Solutions, LLC, as Servicing Function
Participant of the Miami Design District Mortgage Loan (see Exhibit 33.30)

 33.38
as Servicing Function Participant for the Custodian (see Exhibit 33.7)

 Attestation
reports on assessment of compliance with servicing criteria for asset-backed
securities.

 34.1
National Association, as Master Servicer

 34.2
 3650 REIT Loan Servicing LLC, as Special Servicer

 34.3
 Wells Fargo Bank, National Association, as Trustee
and Certificate Administrator

 34.4
Custodian

 34.5
Advisor

 34.6
as Servicing Function Participant for the Certificate Administrator

 34.7
as Servicing Function Participant for the Custodian

 34.8
 Principal Real Estate Investors, LLC, as Primary
Servicer of the 888 Figueroa Mortgage Loan

 34.9
 LNR Partners, LLC, as Special Servicer of the 888
Figueroa Mortgage Loan

 34.10
Wells Fargo Bank, National Association, as Trustee of the 888 Figueroa Mortgage
Loan (Omitted. See Explanatory Notes.)

 34.11
Custodian of the 888 Figueroa Mortgage Loan (see Exhibit 34.4)

 34.12
Advisor of the 888 Figueroa Mortgage Loan (see Exhibit 34.5)

 34.13
as Servicing Function Participant for the Custodian (see Exhibit 34.7)

 34.14
National Association, as Primary Servicer of The Westchester Mortgage Loan (see
Exhibit 34.1)

 34.15
National Association, as Special Servicer of The Westchester Mortgage Loan (see
Exhibit 34.1)

 34.16
Wells Fargo Bank, National Association, as Trustee of The Westchester Mortgage
Loan (Omitted. See Explanatory Notes.)

 34.17
Custodian of The Westchester Mortgage Loan (see Exhibit 34.4)

 34.18
 Pentalpha Surveillance LLC, as Operating Advisor
of The Westchester Mortgage Loan

 34.19
as Servicing Function Participant for the Custodian (see Exhibit 34.7)

 34.20
 KeyBank National Association, as Primary Servicer
of the MGM Grand & Mandalay Bay Mortgage Loan

 34.21
 Situs Holdings, LLC, as Special Servicer of the
MGM Grand & Mandalay Bay Mortgage Loan

 34.22
Wilmington Trust, National Association, as Trustee of the MGM Grand &
Mandalay Bay Mortgage Loan (Omitted. See Explanatory Notes.)

 34.23
 Citibank, N.A., as Custodian of the MGM Grand
& Mandalay Bay Mortgage Loan

 34.24
 U.S. Bank National Association, as Servicing
Function Participant of the MGM Grand & Mandalay Bay Mortgage Loan

 34.25
Servicer of The Grace Building Mortgage Loan

 34.26
 Situs Holdings, LLC, as Special Servicer of The
Grace Building Mortgage Loan (see Exhibit 34.21)

 34.27
Wilmington Trust, National Association, as Trustee of The Grace Building

 34.28
Custodian of The Grace Building Mortgage Loan (see Exhibit 34.4)

 34.29
Advisor of The Grace Building Mortgage Loan (see Exhibit 34.5)

 34.30
 CoreLogic Solutions, LLC, as Servicing Function
Participant of The Grace Building Mortgage Loan

 34.31
as Servicing Function Participant for the Custodian (see Exhibit 34.7)

 34.32
Servicer of the Miami Design District Mortgage Loan (see Exhibit 34.25)

 34.33
 Rialto Capital Advisors, LLC, as Special Servicer
of the Miami Design District Mortgage Loan

 34.34
Wilmington Trust, National Association, as Trustee of the Miami Design District

 34.35
 Wells Fargo Bank, National Association, as Custodian
of the Miami Design District Mortgage Loan (see Exhibit 34.4)

 34.36
Advisor of the Miami Design District Mortgage Loan (see Exhibit 34.5)

 34.37
 CoreLogic Solutions, LLC, as Servicing Function
Participant of the Miami Design District Mortgage Loan (see Exhibit 34.30)

 34.38
as Servicing Function Participant for the Custodian (see Exhibit 34.7)

Servicer compliance statements.

 35.1
National Association, as Master Servicer

 35.2
 3650 REIT Loan Servicing LLC, as Special Servicer

 35.3
Certificate Administrator

 35.4
as Servicing Function Participant for the Certificate Administrator

 35.5
Principal Real Estate Investors, LLC, as Primary Servicer of the 888 Figueroa

 35.6
LNR Partners, LLC, as Special Servicer of the 888 Figueroa Mortgage Loan
(Omitted. See Explanatory Notes.)

 35.7
National Association, as Primary Servicer of The Westchester Mortgage Loan (see
Exhibit 35.1)

 35.8
National Association, as Special Servicer of The Westchester Mortgage Loan (see
Exhibit 35.1)

 35.9
KeyBank National Association, as Primary Servicer of the MGM Grand &
Mandalay Bay Mortgage Loan (Omitted. See Explanatory Notes.)

 35.10
 Situs Holdings, LLC, as Special Servicer of the
MGM Grand & Mandalay Bay Mortgage Loan

 35.11
Servicer of The Grace Building Mortgage Loan

 35.12
 Situs Holdings, LLC, as Special Servicer of The
Grace Building Mortgage Loan (see Exhibit 35.10)

 35.13
Servicer of the Miami Design District Mortgage Loan (see Exhibit 35.11)

 35.14
Rialto Capital Advisors, LLC, as Special Servicer of the Miami Design District

 99.1
 Mortgage
Loan Purchase Agreement, dated as of March 23, 2021, between Credit Suisse
Commercial Mortgage Securities Corp. and Column Financial, Inc. (filed as
Exhibit 99.1 to the registrant's Current Report on Form 8-K filed on March 30,
2021 under Commission File No. 333-227081-06 and incorporated by reference
herein).

 99.2
 Mortgage
Loan Purchase Agreement, dated as of March 23, 2021, among Credit Suisse
Commercial Mortgage Securities Corp., 3650 REIT Loan Funding 1 LLC, f/k/a Grass
River Real Estate Credit Partners Loan Funding, LLC and 3650 Real Estate
Investment Trust 1 LLC, f/k/a Grass River Real Estate Credit Partners REIT, LLC
(filed as Exhibit 99.2 to the registrant's Current Report on Form 8-K filed on
March 30, 2021 under Commission File No. 333-227081-06 and incorporated by
reference herein).

 99.3
 Mortgage
Loan Purchase Agreement, dated as of March 23, 2021, between Credit Suisse
Commercial Mortgage Securities Corp. and UBS AG, by and through its branch
office at 1285 Avenue of the Americas, New York, New York (filed as Exhibit
99.4 to the registrant's Current Report on Form 8-K filed on March 30, 2021
under Commission File No. 333-227081-06 and incorporated by reference herein).

 99.4
 Mortgage
Loan Purchase Agreement, dated as of March 23, 2021, between Credit Suisse
Commercial Mortgage Securities Corp. and German American Capital Corporation
(filed as Exhibit 99.3 to the registrant's Current Report on Form 8-K filed on
March 30, 2021 under Commission File No. 333-227081-06 and incorporated by
reference herein).

 99.5
 Sub-Servicing
Agreement, dated as of August 1, 2019, by and between Midland Loan Services, a
Division of PNC Bank, National Association and Principal Real Estate Investors,
LLC (filed as Exhibit 99.5 to the registrant's Current Report on Form 8-K filed
on March 30, 2021 under Commission File No. 333-227081-06 and incorporated by
reference herein).

 (b) The exhibits required to be filed by the
Registrant pursuant to Item 601 of Regulation S-K are listed above.

 (c) Not Applicable.

 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.

 Credit Suisse Commercial Mortgage
Securities Corp.

(Depositor)

 /s/
Lawrence
Chun

 Lawrence Chun, Authorized Signatory

 (senior officer in charge of
securitization of the depositor)

 Date: March 15, 2024


UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

 Washington, D.C. 20549

 FORM 10-K

 (Mark One)

 x 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

 o 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 of the issuing entity: 333-195164-08

 Central Index Key Number of the issuing entity:
0001638933

 Wells Fargo Commercial Mortgage
Trust 2015-C28

 (exact name of the issuing entity as specified in its
charter)

 Central Index Key Number of the depositor: 0000850779

 Wells Fargo Commercial Mortgage
Securities, Inc.

 (exact name of the depositor as specified in its
charter)

 Central Index Key Number of the sponsor: 0000740906

 Wells Fargo Bank, National
Association

 (exact name of the sponsor as specified in its charter)

 Central Index Key Number of the sponsor: 0001592182

 LMF Commercial, LLC

 (exact name of the sponsor as specified in its charter)

 (formerly known as Rialto
Mortgage Finance, LLC)

 Central Index Key Number of the sponsor: 0001541214

 C-III Commercial Mortgage LLC

 (exact name of the sponsor as specified in its charter)

 Central Index Key Number of the sponsor: 0001542105

 Basis Real Estate Capital II, LLC

 (exact name of the sponsor as specified in its charter)

 New York

 (State or other jurisdiction of

 incorporation or organization of

 the issuing entity)

 38-3968483

 38-3968484

 38-3968485

 38-7135359

 (I.R.S. Employer

 Identification Numbers)

c/o Computershare Trust Company, National Association, as agent for

 Wells Fargo Bank, National Association

 as Certificate Administrator

 9062 Old Annapolis Road

 Columbia, MD

 (Address of principal
executive offices of the issuing entity)

 21045

 (Zip Code)

 Registrant's telephone number,
including area code:

 (704) 374-6161

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

 Title of each class

 Trading Symbol(s)

 Name of each exchange on which registered

 None

 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. o 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. o 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 o 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 (Section 232.405 of this chapter) during the
preceding 12 months (or for such shorter period that the registrant was
required to submit such files).

 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 o
Accelerated
filer
o

 Non-accelerated
filer

Smaller reporting
company
o

Emerging growth
company
o

 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 to
Section 13(a) of the Exchange Act. o

 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. o

 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. o

 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). o

 Indicate by check mark whether the registrant is a shell
company (as defined in Rule 12b-2 of the Act). o Yes No

 State the aggregate market value of the voting and non-voting
common equity held by non-affiliates computed by reference to the price at
which the common equity was last sold, or the average bid and asked price of
such common equity, as of the last business day of the registrant's most
recently completed second fiscal quarter.

 Indicate by check mark whether the registrant has filed all
documents and reports required to be filed by Section 12, 13 or 15(d) of the
Securities Exchange Act of 1934 subsequent to the distribution of securities
under a plan confirmed by a court. o
Yes o
No

 Indicate the number of shares outstanding of each of the
registrant's classes of common stock, as of the latest practicable date.

 DOCUMENTS INCORPORATED BY REFERENCE

 List hereunder the following documents if incorporated by
reference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) into
which the document is incorporated: (1) Any annual report to security holders;
(2) Any proxy or information statement; and (3) Any prospectus filed pursuant
to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents
should be clearly described for identification purposes (e.g., annual report to
security holders for fiscal year ended December 24, 1980).

 EXPLANATORY NOTES

 The Eastgate One Phases I-VII & XII
Mortgage Loan, the Eastgate Two Phases VIII-X Mortgage Loan and the Brickyard
Square Mortgage Loan, which constituted approximately 6.4%, 5.2% and 2.1%,
respectively, of the asset pool of the issuing entity as of its cut-off date,
are each an asset of the issuing entity and are each part of a loan combination
that includes the Eastgate One Phases I-VII & XII Mortgage Loan, the
Eastgate Two Phases VIII-X Mortgage Loan or the Brickyard Square Mortgage
Loan and one other pari passu loan, which is not an asset of the issuing
entity. These loan combinations, including the Eastgate One Phases I-VII &
XII Mortgage Loan, the Eastgate Two Phases VIII-X Mortgage Loan and the
Brickyard Square Mortgage Loan, are being serviced and administered pursuant to
the Pooling and Servicing Agreement, which is incorporated by reference as
Exhibit 4 to this Annual Report on Form 10-K.

 The master servicer of a pooling
and servicing agreement or trust and servicing agreement also functions as the
primary servicer of the related mortgage loans serviced and administered
pursuant to such agreement unless a separate primary servicer is identified
herein. If this report does not identify a separate primary servicer, the
servicer compliance statement provided by the master servicer under any such
agreement also encompasses its responsibilities as primary servicer of the
related mortgage loan or mortgage loans.

 Wilmington Trust, National
Association acts as trustee of the mortgage loans serviced under the
Pooling and Servicing Agreement. Pursuant to the Pooling and Servicing
Agreement, the trustee is required to provide an assessment of compliance with
applicable servicing criteria solely with respect to Item 1122(d)(2)(iii) of
Regulation AB (regarding advances of funds or guarantees regarding collections,
cash flows or distributions, and any interest or other fees charged for such
advances, are made, reviewed and approved as specified in the transaction
agreements). However, during the reporting period, the trustee did not perform
any servicing function with respect to the servicing criteria specified in Item
1122(d)(2)(iii) of Regulation AB. The master servicer or the special
servicer, to the extent required, performed the servicing function identified with
respect to Item 1122(d)(2)(iii) of Regulation AB, and each such party included
Item 1122(d)(2)(iii) of Regulation AB in the assessment of compliance with
applicable servicing criteria and accountant's attestation report for the
subject transaction. As a result, this Annual Report on Form 10-K does
not include an assessment of compliance with applicable servicing criteria of
the trustee. One or more other servicers of the mortgage loans serviced
under the Pooling and Servicing Agreement have delivered one or more
assessments of compliance with respect to Item 1122(d)(2)(iii) of Regulation
AB.

 This Annual Report on Form 10-K
includes assessments of compliance with applicable servicing criteria and
accountants' attestation reports from CoreLogic Solutions, LLC. This
entity was engaged by the master servicer under the Pooling and Servicing
Agreement to remit tax payments received from the escrow accounts of borrowers
to local taxing authorities, to report tax amounts due, to verify tax parcel
information, and to verify non-escrow tax payments. These servicing functions
are included within the servicing criteria set forth in Items 1122(d)(4)(xi)
and 1122(d)(4)(xii) of Regulation AB. Therefore, under the
principles-based definition of "servicer" set forth in Item 1101(j) of
Regulation AB that looks to the functions that an entity performs, this vendor
is a "servicer" for the purposes of Item 1122 of Regulation AB. See
Compliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).

 This Annual Report on Form 10-K
includes an assessment of compliance with applicable servicing criteria,
accountants' attestation report and servicer compliance statement from
Computershare Trust Company, National Association (" CTCNA "). CTCNA
was engaged by Wells Fargo Bank, National Association (" Wells Fargo "),
in its capacity as certificate administrator and custodian, to perform certain
specified servicing functions identified in the assessment of compliance with
applicable servicing criteria and accountants' attestation reports. Wells
Fargo engaged CTCNA in connection with the sale of Wells Fargo's corporate
trust services business to CTCNA and its affiliates. Further, under the
principles-based definition of "servicer" set forth in Item 1101(j) of
Regulation AB that looks to the functions that an entity performs, this party
is a "servicer" for the purposes of Item 1123 of Regulation AB. See
Compliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).

 Item 1. Business.

 Item 1A. Risk Factors.

 Item 1B. Unresolved Staff Comments.

 None.

 Item 1C. Cybersecurity.

 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 Operations.

 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.

 None.

 Item 9C. Disclosure Regarding Foreign Jurisdictions
that Prevent Inspections.

 None.

 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.

 ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB

 Item 1112(b) of Regulation AB, Significant Obligor
Financial Information.

 No single obligor represents 10% or more of the pool assets
held by the issuing entity.

 Item 1114(b)(2) of Regulation AB, Significant Enhancement
Provider Financial Information.

 No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction as
described under Item 1114(a) of Regulation AB.

 Item 1115(b) of Regulation AB, Certain Derivatives
Instruments (Financial Information).

 No entity or group of affiliated entities provides any
derivative instruments or other support for the certificates within this
transaction as described under Item 1115 of Regulation AB.

 Item 1117 of Regulation AB, Legal Proceedings.

 The registrant knows of no material pending legal proceeding
involving the trust or any party related to the trust, other than routine
litigation incidental to the duties of those respective parties, and the
following, with respect to Wells Fargo Bank, National Association, as
certificate administrator and custodian.

 In December 2014, Phoenix Light SF
Limited (Phoenix Light) and certain related entities filed a complaint in the
United States District Court for the Southern District of New York alleging
claims against Wells Fargo Bank, N.A., in its capacity as trustee for a number
of residential mortgage-backed securities (RMBS) trusts. Complaints raising
similar allegations have been filed by Commerzbank AG in the Southern District
of New York, IKB International and IKB Deutsche Industriebank (together, IKB)
in New York state court, and Park Royal I LLC and Park Royal II LLC in New York
state court. In each case, the plaintiffs allege that Wells Fargo Bank, N.A.,
as trustee, caused losses to investors, and plaintiffs assert causes of action
based upon, among other things, the trustee's alleged failure to notify and
enforce repurchase obligations of mortgage loan sellers for purported breaches
of representations and warranties, notify investors of alleged events of
default, and abide by appropriate standards of care following alleged events of
default. In July 2022, the district court dismissed Phoenix Light's claims and
certain of the claims asserted by Commerzbank AG, and subsequently entered
judgment in each case in favor of Wells Fargo Bank, N.A. In August 2022,
Phoenix Light and Commerzbank AG each appealed the district court's decision to
the United States Court of Appeals for the Second Circuit. Phoenix Light
dismissed its appeal in May 2023, terminating its case. In November 2023, Wells
Fargo Bank, N.A. entered into an agreement with IKB to resolve IKB's claims.
Wells Fargo Bank, N.A. previously settled two class actions filed by
institutional investors and an action filed by the National Credit Union
Administration with similar allegations.

 Item 1119 of Regulation AB, Affiliations and Certain
Relationships and Related Transactions.

 The information regarding this Item has been previously
provided in a prospectus supplement of the Registrant relating to the issuing
entity filed on May 21, 2015 pursuant to Rule 424(b)(5).

 Item 1122 of Regulation AB, Compliance with Applicable
Servicing Criteria.

 The reports on assessments of compliance with the servicing
criteria for asset-backed securities and related attestation reports on such
assessments of compliance with respect to the mortgage loans are attached
hereto under Item 15 to this Annual Report on Form 10-K. Attached as Schedule
III to the Pooling and Servicing Agreement incorporated by reference as Exhibit
4 to this Annual Report on Form 10-K is a chart identifying the entities
participating in a servicing function for the transaction responsible for each
applicable servicing criteria set forth in Item 1122(d).

 Item 1123 of Regulation AB, Servicer Compliance Statement.

 The servicer compliance statements are attached as Exhibits
to this Annual Report on Form 10-K.

 Item 15. Exhibit and Financial Statement Schedules

 (a) The following is a list of documents filed as part of
this Annual Report on Form 10-K:

 (1) Not applicable

 (2) Not applicable

 (3) See below

 Pooling
and Servicing Agreement, dated as of May 1, 2015, by and among Wells Fargo
Commercial Mortgage Securities, Inc., as Depositor, Wells Fargo Bank, National
Association, as Master Servicer, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer, Pentalpha Surveillance LLC, as Trust
Advisor, Wells Fargo Bank, National Association, as Certificate Administrator,
as Tax Administrator and as Custodian, and Wilmington Trust, National
Association, as Trustee (filed as Exhibit 4.1 to the registrant's Current
Report on Form 8-K/A filed on July 1, 2015 under Commission File No.
333-195164-08 and incorporated by reference herein).

 Rule 13a-14(d)/15d-14(d) Certifications.

Reports on assessment of compliance with servicing criteria for asset-backed
securities.

 33.1
 Wells Fargo Bank, National Association, as Master
Servicer

 33.2
 LNR Partners, LLC, as Special Servicer prior to
April 24, 2023

 33.3
Servicer on and after April 24, 2023

 33.4
Wilmington Trust, National Association, as Trustee (Omitted. See Explanatory
Notes.)

 33.5
Certificate Administrator

 33.6
Custodian

 33.7
 Pentalpha Surveillance LLC, as Trust Advisor

 33.8
Participant

 33.9
as Servicing Function Participant for the Certificate Administrator

 33.10 Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian

 33.11
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit
33.1)

 33.12
 LNR Partners, LLC, as Special Servicer of the Eastgate
One Phases I-VII & XII Mortgage Loan prior to April 24, 2023 (see Exhibit
33.2)

 33.13
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan on and after
April 24, 2023 (see Exhibit 33.3)

 33.14
Wilmington Trust, National Association, as Trustee of the Eastgate One Phases
I-VII & XII Mortgage Loan (Omitted. See Explanatory Notes.)

 33.15
Custodian of the Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit
33.6)

 33.16
Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit 33.7)

 33.17
Participant of the Eastgate One Phases I-VII & XII Mortgage Loan (see
Exhibit 33.8)

 33.18
as Servicing Function Participant for the Custodian (see Exhibit 33.10)

 33.19
Servicer of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 33.1)

 33.20
Eastgate Two Phases VIII-X Mortgage Loan prior to April 24, 2023 (see Exhibit
33.2)

 33.21
Servicer of the Eastgate Two Phases VIII-X Mortgage Loan on and after April 24,
2023 (see Exhibit 33.3)

 33.22
Wilmington Trust, National Association, as Trustee of the Eastgate Two Phases
VIII-X Mortgage Loan (Omitted. See Explanatory Notes.)

 33.23
Custodian of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 33.6)

 33.24
Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 33.7)

 33.25
 CoreLogic Solutions, LLC, as Servicing Function Participant
of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 33.8)

 33.26
as Servicing Function Participant for the Custodian (see Exhibit 33.10)

 33.27
Servicer of the Brickyard Square Mortgage Loan (see Exhibit 33.1)

 33.28
Brickyard Square Mortgage Loan prior to April 24, 2023 (see Exhibit 33.2)

 33.29
Servicer of the Brickyard Square Mortgage Loan on and after April 24, 2023 (see
Exhibit 33.3)

 33.30
Wilmington Trust, National Association, as Trustee of the Brickyard Square
Mortgage Loan (Omitted. See Explanatory Notes.)

 33.31
Custodian of the Brickyard Square Mortgage Loan (see Exhibit 33.6)

 33.32
Brickyard Square Mortgage Loan (see Exhibit 33.7)

 33.33
Participant of the Brickyard Square Mortgage Loan (see Exhibit 33.8)

 33.34
as Servicing Function Participant for the Custodian (see Exhibit 33.10)

 Attestation
reports on assessment of compliance with servicing criteria for asset-backed
securities.

 34.1
 Wells Fargo Bank, National Association, as Master Servicer

 34.2 LNR Partners, LLC, as Special Servicer prior to April
24, 2023

 34.3
Servicer on and after April 24, 2023

 34.4
Wilmington Trust, National Association, as Trustee (Omitted. See Explanatory
Notes.)

 34.5
Certificate Administrator

 34.6
Custodian

 34.7
 Pentalpha Surveillance LLC, as Trust Advisor

 34.8
Participant

 34.9
as Servicing Function Participant for the Certificate Administrator

 34.10
as Servicing Function Participant for the Custodian

 34.11
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit
34.1)

 34.12
Eastgate One Phases I-VII & XII Mortgage Loan prior to April 24, 2023 (see
Exhibit 34.2)

 34.13
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan on and after
April 24, 2023 (see Exhibit 34.3)

 34.14
Wilmington Trust, National Association, as Trustee of the Eastgate One Phases
I-VII & XII Mortgage Loan (Omitted. See Explanatory Notes.)

 34.15
 Wells Fargo Bank, National Association, as Custodian
of the Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit 34.6)

 34.16
Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit 34.7)

 34.17
Participant of the Eastgate One Phases I-VII & XII Mortgage Loan (see
Exhibit 34.8)

 34.18
as Servicing Function Participant for the Custodian (see Exhibit 34.10)

 34.19
Servicer of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 34.1)

 34.20 LNR Partners, LLC, as Special Servicer of the Eastgate
Two Phases VIII-X Mortgage Loan prior to April 24, 2023 (see Exhibit 34.2)

 34.21
 Greystone Servicing Company LLC, as Special Servicer
of the Eastgate Two Phases VIII-X Mortgage Loan on and after April 24, 2023
(see Exhibit 34.3)

 34.22
Wilmington Trust, National Association, as Trustee of the Eastgate Two Phases
VIII-X Mortgage Loan (Omitted. See Explanatory Notes.)

 34.23
Custodian of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 34.6)

 34.24
Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 34.7)

 34.25
Participant of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 34.8)

 34.26
as Servicing Function Participant for the Custodian (see Exhibit 34.10)

 34.27
Servicer of the Brickyard Square Mortgage Loan (see Exhibit 34.1)

 34.28
Brickyard Square Mortgage Loan prior to April 24, 2023 (see Exhibit 34.2)

 34.29
Servicer of the Brickyard Square Mortgage Loan on and after April 24, 2023 (see
Exhibit 34.3)

 34.30
Wilmington Trust, National Association, as Trustee of the Brickyard Square
Mortgage Loan (Omitted. See Explanatory Notes.)

 34.31
Custodian of the Brickyard Square Mortgage Loan (see Exhibit 34.6)

 34.32
Brickyard Square Mortgage Loan (see Exhibit 34.7)

 34.33
Participant of the Brickyard Square Mortgage Loan (see Exhibit 34.8)

 34.34
as Servicing Function Participant for the Custodian (see Exhibit 34.10)

Servicer compliance statements.

 35.1
 Wells Fargo Bank, National Association, as Master
Servicer

 35.2
 LNR Partners, LLC, as Special Servicer prior to
April 24, 2023

 35.3
Servicer on and after April 24, 2023

 35.4
Certificate Administrator

 35.5
as Servicing Function Participant for the Certificate Administrator

 35.6
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan (see Exhibit
35.1)

 35.7
Eastgate One Phases I-VII & XII Mortgage Loan prior to April 24, 2023 (see
Exhibit 35.2)

 35.8
Servicer of the Eastgate One Phases I-VII & XII Mortgage Loan on and after
April 24, 2023 (see Exhibit 35.3)

 35.9
Servicer of the Eastgate Two Phases VIII-X Mortgage Loan (see Exhibit 35.1)

 35.10
Eastgate Two Phases VIII-X Mortgage Loan prior to April 24, 2023 (see Exhibit
35.2)

 35.11
Servicer of the Eastgate Two Phases VIII-X Mortgage Loan on and after April 24,
2023 (see Exhibit 35.3)

 35.12
Servicer of the Brickyard Square Mortgage Loan (see Exhibit 35.1)

 35.13
Brickyard Square Mortgage Loan prior to April 24, 2023 (see Exhibit 35.2)

 35.14
Servicer of the Brickyard Square Mortgage Loan on and after April 24, 2023 (see
Exhibit 35.3)

 99.1
 Mortgage
Loan Purchase Agreement, dated as of May 13, 2015, between Wells Fargo
Commercial Mortgage Securities, Inc. and Wells Fargo Bank, National Association
(filed as Exhibit 99.1 to the registrant's Current Report on Form 8-K/A filed
on July 1, 2015 under Commission File No. 333-195164-08 and incorporated by
reference herein)

 99.2
 Mortgage
Loan Purchase Agreement, dated as of May 13, 2015, between Wells Fargo
Commercial Mortgage Securities, Inc. and Rialto Mortgage Finance, LLC (filed as
Exhibit 99.2 to the registrant's Current Report on Form 8-K/A filed on July 1,
2015 under Commission File No. 333-195164-08 and incorporated by reference
herein)

 99.3
 Mortgage
Loan Purchase Agreement, dated as of May 13, 2015, between Wells Fargo
Commercial Mortgage Securities, Inc. and C-III Commercial Mortgage LLC (filed
as Exhibit 99.3 to the registrant's Current Report on Form 8-K/A filed on July
1, 2015 under Commission File No. 333-195164-08 and incorporated by reference
herein)

 99.4
 Mortgage
Loan Purchase Agreement, dated as of May 13, 2015, among Wells Fargo Commercial
Mortgage Securities, Inc., Basis Real Estate Capital II, LLC and Basis
Investment Group LLC (filed as Exhibit 99.4 to the registrant's Current Report
on Form 8-K/A filed on July 1, 2015 under Commission File No. 333-195164-08 and
incorporated by reference herein)

 (b)
The exhibits required to be filed by the Registrant pursuant to Item 601 of
Regulation S-K are listed above.

 (c)
Not Applicable.

 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.

 Wells Fargo Commercial Mortgage
Securities, Inc.

(Depositor)

 /s/ Anthony
Sfarra

 Anthony
Sfarra, President

 (senior officer in charge of
securitization of the depositor)

 Date: March 15, 2024