Amendment to Asset-Backed Issuer Distribution Report (Form 10-D/A)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

FORM 10-D/A

Amendment No. 1

ASSET BACKED ISSUER
DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the monthly distribution period from: April 18, 2026 to May 15, 2026

Commission File Number of issuing entity: 333-226943-10

Central Index Key Number of issuing entity: 0001858289

Benchmark 2021-B26 Mortgage Trust
(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-226943

Central Index Key Number of depositor: 0001013454

Deutsche Mortgage & Asset Receiving Corporation
(Exact name of depositor as specified in its charter)

Lainie Kaye (212) 250-2500
(Name and telephone number, including area code, of the person to contact in connection with this filing)

New York
(State or other jurisdiction of incorporation or organization of the issuing entity)

35-7287138
38-4178110
38-4178111
(I.R.S. Employer Identification No.)

c/o Computershare Trust Company, N.A., as agent for
Wells Fargo Bank, National Association
9062 Old Annapolis Road
Columbia, MD 21045
(Address of principal executive offices of the issuing entity) (Zip Code)

(667) 786-1992
(Telephone number, including area code)

Not Applicable
(Former name, former address, if changed since last report)

Registered/reporting pursuant to (check one)

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 X No

Explanatory Note:

This Form 10-D/A amends the registrant's Asset Backed Issuer Distribution Report on Form 10-D filed by the Registrant on May 29, 2026 (SEC Accession No. 0001888524-26-010496) (the "Original 10-D"). The Original 10-D relates to another transaction and was incorrectly filed under the Central Index Key (CIK) number and Commission File Number for the Benchmark 2021-B26 Mortgage Trust issuing entity (the "Issuing Entity"). The Original 10-D should be disregarded in its entirety and should not be considered part of the filings with respect to the Issuing Entity.

SIGNATURES

Pursuant to the requirements 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.

Deutsche Mortgage & Asset Receiving Corporation
(Depositor)