M&T BANK CORP

As reported on M&T's Form 8-K dated September 28, 2026, effective for the third quarter of 2026 M&T made certain changes and reclassifications to other income categories presented in its Consolidated Statement of Income. Also effective for the third quarter of 2026, M&T began separately presenting loans held for sale from loans held for investment in its Consolidated Balance Sheet and its Average Balance Sheet and Annualized Taxable-equivalent Rates disclosures. Accordingly, annualized taxable-equivalent rates for each impacted loan category and certain loan-based credit quality ratios exclude loans held for sale. Additionally, as reported in M&T's Form 10-Q for the quarter ended June 30, 2026, in conjunction with the implementation of a new general ledger platform during the second quarter of 2026, the Company modified its methodology for calculating annualized taxable-equivalent rates for certain earning assets and interest-bearing liabilities, including certain average deposit balances. All periods presented herein reflect those changes.

Effective January 1, 2026, the Company elected to prospectively measure its residential mortgage loan servicing right assets at fair value with changes in fair value reflected in mortgage banking revenues. As a result, amortization associated with residential mortgage loan servicing right assets previously recognized in other costs of operations is no longer recorded. Instead, beginning in 2026, fair value changes in the residential mortgage loan servicing right assets, inclusive of the realization of expected net servicing revenues over time, are included in mortgage banking revenues. On December 31, 2025, the Company began economically hedging the risk of fair value changes in these assets through the use of various interest rate and other derivative contracts, for which changes in fair value are also reflected in mortgage banking revenues. As a result of the Company's election on January 1, 2026 to prospectively measure residential mortgage loan servicing right assets at fair value, the Company recorded an increase in capitalized servicing assets included in accrued interest and other assets of $263 million and a corresponding after-tax increase to retained earnings of $197 million, representing an 8 basis-point increase to the CET1 capital ratio on the election date.

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