Company: MTB-PJ
Filing Date: 2025-03-04
Form Type: DEF 14A
Source: 0001193125-25-044781
Chunk: 91

Company: M&T BANK CORP
Filing Date: 2025-03-04
Form: DEF 14A
Chunk 91
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 should do so no earlier than October 5, 2025 and no later than November 4, 2025. These proxy access procedures are separate from the advance notice procedures referred to above, from the SEC’s requirements that a shareholder must meet in order to have a shareholder proposal included in our proxy statement pursuant to SEC Rule 14a-8referred to above, and from the procedures you must follow to submit a director nominee for consideration by the N&G Committee as described in this proxy statement (see “Nomination and Governance Committee” in the section titled “ Corporate Governance of M&T Bank Corporation”). How do I discontinue multiple mailings? In accordance with a notice sent to certain shareholders who receive paper copies of the proxy materials, multiple shareholders sharing a single address will receive only one copy of this proxy statement, the message to shareholders and Form 10-K,unless we have previously received other instructions. This practice, known as “householding,” is designed to reduce printing and postage costs. If you are a Registered Holder and have more than one account in your name or at the same address as other shareholders of record, you may authorize M&T to discontinue mailings of multiple sets of proxy materials. To discontinue multiple mailings, or to reinstate multiple mailings, please either mail your request to M&T Bank Corporation, Attention: Shareholder Relations, One M&T Plaza, Buffalo, New York 14203, or send your request to Shareholder Relations via electronic mail at ir@mtb.com.

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Appendix A Reconciliation of GAAP to Non-GAAPMeasures As indicated in this proxy statement, the C&HC Committee and management use certain non-GAAPmeasures, such as Return on Tangible Common Equity (ROTCE), as part of M&T’s executive compensation program, which they believe better reflect the impact of acquisition activity in reported results. Below is a reconciliation of GAAP measures with corresponding non-GAAPmeasures for 2022, 2023 and 2024.

| Income statement data In millions                           |     | Year ended 
 12/31/2024 |   |        |   |     | Year ended 
 12/31/2023 |   |        |   |     | Year ended 
 12/31/2022 |   |        |   |
|:------------------------------------------------------------|:----|:-----------|:--|-------:|:--|:----|:-----------|:--|-------:|:--