M&T BANK CORP

(a) Evaluation of disclosure controls and procedures. Based upon an evaluation carried out as of the end of the period covered by this report under the supervision and with the participation of M&T's management, including its Chairman and Chief Executive Officer and its Chief Financial Officer, of the effectiveness of M&T’s disclosure controls and procedures (as defined in Exchange Act rule 13a-15(e)), René F. Jones, Chairman of the Board and Chief Executive Officer, and Daryl N. Bible, Senior Executive Vice President and Chief Financial Officer, concluded that M&T’s disclosure controls and procedures were effective as of March 31, 2026.

(b) Changes in internal control over financial reporting. M&T regularly assesses and enhances its internal control over financial reporting. The Company is conducting a multi-phase implementation of new financial recordkeeping and reporting systems, including its general ledger and certain subledger platforms. In conjunction therewith the Company has and will continue to change certain processes and internal controls over financial reporting. No changes have been identified during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, M&T’s internal control over financial reporting. The conversion of the Company's core general ledger platform was completed in April 2026.

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