UNITED STATES SECURITIES AND EXCHANGE COMMISSION FORM 8-K Date of Report (Date of earliest event reported): December 6, 2022 M&T BANK CORPORATION Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ On December 6, 2022, M&T Bank Corporation (“M&T”) posted an investor presentation to its website. A copy of the presentation is attached as Exhibit 99.1 hereto. From time to time, M&T may use this presentation in conversations with investors and analysts. The presentation can be found on the Investor Relations page of M&T’s website at https://ir.mtb.com/events-presentations. The information in this Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), or otherwise subject to the liability of such section, nor shall it be deemed incorporated by reference in any filing of M&T under the Securities Act of 1933 or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. More