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

oTRANSITION 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 oNo

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).

Not applicable.

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.

Not applicable.

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 oNo

Not applicable.

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

Not applicable.

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

The Exhibit Index describes exhibits provided by certain parties (in their capacities indicated on the 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.

The Exhibit Index describes exhibits provided by certain parties (in their capacities indicated on the 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.

The Exhibit Index describes exhibits provided by certain parties (in their capacities indicated on the 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.

The Exhibit Index describes exhibits provided by certain parties (in their capacities indicated on the 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.

The Exhibit Index describes exhibits provided by certain parties (in their capacities indicated on the 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.

PART I

Item 1.  Business.

Omitted.

Item 1A.  Risk Factors.

Omitted.

Item 1B.  Unresolved Staff Comments.

None.

Item 1C.  Cybersecurity.

Omitted.

Item 2.  Properties.

Omitted.

Item 3.  Legal Proceedings.

Omitted.

Item 4.  Mine Safety Disclosures.

Not applicable.

PART II

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

Omitted.

Item 6. 

[Reserved]

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

Omitted.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk.

Omitted.

Item 8.  Financial Statements and Supplementary Data.

Omitted.

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

Omitted.

Item 9A.  Controls and Procedures.

Omitted.

Item 9B.  Other Information.

None.

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

None.

PART III

Item 10.  Directors, Executive Officers and Corporate Governance.

Omitted.

Item 11.  Executive Compensation.

Omitted.

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

Omitted.

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

Omitted.

Item 14.  Principal Accountant Fees and Services.

Omitted.

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.

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 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).

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 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).

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 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).

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 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).

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 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).

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 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.

PART IV

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).

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

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

33.1         Midland Loan Services, a Division of PNC Bank, 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         Wells Fargo Bank, National Association, as Custodian

33.5         Park Bridge Lender Services LLC, as Operating Advisor

33.6         Computershare Trust Company, National Association, as Servicing Function Participant for the Certificate Administrator

33.7         Computershare Trust Company, National Association, 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       Wells Fargo Bank, National Association, as Custodian of the 888 Figueroa Mortgage Loan (see Exhibit 33.4)

33.12       Park Bridge Lender Services LLC, as Operating Advisor of the 888 Figueroa Mortgage Loan (see Exhibit 33.5)

33.13       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 33.7)

33.14       Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of The Westchester Mortgage Loan (see Exhibit 33.1)

33.15       Midland Loan Services, a Division of PNC Bank, 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       Wells Fargo Bank, National Association, as 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       Computershare Trust Company, National Association, 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       Wells Fargo Bank, National Association, as Primary 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 Mortgage Loan (Omitted. See Explanatory Notes.)

33.28       Wells Fargo Bank, National Association, as Custodian of The Grace Building Mortgage Loan (see Exhibit 33.4)

33.29       Park Bridge Lender Services LLC, as Operating 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       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 33.7)

33.32       Wells Fargo Bank, National Association, as Primary 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 Mortgage Loan (Omitted. See Explanatory Notes.)

33.35       Wells Fargo Bank, National Association, as Custodian of the Miami Design District Mortgage Loan (see Exhibit 33.4)

33.36       Park Bridge Lender Services LLC, as Operating 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       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 33.7)

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

34.1         Midland Loan Services, a Division of PNC Bank, 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         Wells Fargo Bank, National Association, as Custodian

34.5         Park Bridge Lender Services LLC, as Operating Advisor

34.6         Computershare Trust Company, National Association, as Servicing Function Participant for the Certificate Administrator

34.7         Computershare Trust Company, National Association, 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       Wells Fargo Bank, National Association, as Custodian of the 888 Figueroa Mortgage Loan (see Exhibit 34.4)

34.12       Park Bridge Lender Services LLC, as Operating Advisor of the 888 Figueroa Mortgage Loan (see Exhibit 34.5)

34.13       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 34.7)

34.14       Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of The Westchester Mortgage Loan (see Exhibit 34.1)

34.15       Midland Loan Services, a Division of PNC Bank, 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       Wells Fargo Bank, National Association, as 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       Computershare Trust Company, National Association, 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       Wells Fargo Bank, National Association, as Primary 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 Mortgage Loan (Omitted. See Explanatory Notes.)

34.28       Wells Fargo Bank, National Association, as Custodian of The Grace Building Mortgage Loan (see Exhibit 34.4)

34.29       Park Bridge Lender Services LLC, as Operating 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       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 34.7)

34.32       Wells Fargo Bank, National Association, as Primary 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 Mortgage Loan (Omitted. See Explanatory Notes.)

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

34.36       Park Bridge Lender Services LLC, as Operating 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       Computershare Trust Company, National Association, as Servicing Function Participant for the Custodian (see Exhibit 34.7)

35            Servicer compliance statements.

35.1         Midland Loan Services, a Division of PNC Bank, National Association, as Master Servicer

35.2         3650 REIT Loan Servicing LLC, as Special Servicer

35.3         Wells Fargo Bank, National Association, as Certificate Administrator

35.4         Computershare Trust Company, National Association, as Servicing Function Participant for the Certificate Administrator

35.5         Principal Real Estate Investors, LLC, as Primary Servicer of the 888 Figueroa Mortgage Loan (Omitted. See Explanatory Notes.)

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

35.7         Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer of The Westchester Mortgage Loan (see Exhibit 35.1)

35.8         Midland Loan Services, a Division of PNC Bank, 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       Wells Fargo Bank, National Association, as Primary 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       Wells Fargo Bank, National Association, as Primary 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 Mortgage Loan (Omitted. See Explanatory Notes.)

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