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 June 30, 2026.

(b) Changes in internal control over financial reporting. M&T regularly assesses and enhances its internal control over financial reporting. During the second quarter of 2026, the Company implemented a new general ledger platform which supports various operational, accounting and reporting activities. In conjunction therewith, certain of the Company's processes and internal controls over financial reporting have been appropriately modified to reflect changes in key business applications and financial processes resulting from this implementation. There were no other changes in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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