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The 10-K filing for BANK 2021-BNK35, a commercial mortgage-backed securities trust issued August 1, 2021, reports compliance with Regulation AB servicing criteria for the fiscal year ended December 31, 2025. No XBRL financial data is available, and standard financial statements are omitted per Item 8. Servicing transitioned significantly: Trimont LLC succeeded Wells Fargo Bank as master servicer, primary servicer, and special servicer effective March 1, 2025, under the BANK 2021-BNK35 PSA and outside PSAs. Midland Loan Services replaced Greystone Servicing as general special servicer under BANK 2021-BNK34 on February 26, 2025, for specific loans including Four Constitution Square. All servicers, including Wells Fargo (pre-transition), Trimont, National Cooperative Bank, KeyBank, and others, provided Item 1122/1123 assertions confirming material compliance. No material instances of noncompliance were reported. Legal proceedings noted include resolved RMBS trustee suits against Wells Fargo and a February 3, 2026, complaint against Wilmington Trust. The filing emphasizes robust servicing oversight amid transitions, with no enhancements or derivatives (Items 1114/1115). Investors should note ongoing servicer changes and monitor pool performance via Form 10-Ds.