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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-9861

M&T BANK CORPORATION

(Exact name of registrant as specified in its charter)

Registrant's telephone number, including area code:

(716) 635-4000

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

☒ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

Number of shares of the registrant's Common Stock, $0.50 par value, outstanding as of the close of business on May 1, 2023: 165,869,832 shares.

Explanatory Note

This Amendment No. 1 amends M&T Bank Corporation’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023, which was filed on May 5, 2023. This Amendment No. 1 is being filed on May 15, 2023 solely for the purpose of correcting a typographical error in Item 1, note 12 of Notes to Financial Statements – Fair Value Measurements in the table included within the "Disclosures of fair value of financial instruments" section on page 38. The estimated fair value of time deposits in the table presenting the carrying amounts and estimated fair value, in thousands, for financial instrument assets (liabilities) as of March 31, 2023 was incorrectly presented without parentheses. The parentheses have been added for time deposits in both the Estimated Fair Value column and the Level 2 column and correctly presented as $(12,808,615) in each column. Except for these corrections, there have been no changes in any of the financial information or other information contained in the original Form 10-Q. This Amendment No. 1 speaks as of the original filing date of the Form 10-Q and does not reflect events that may have occurred subsequent to the original filing date.

The entire Form 10-Q as amended, is included herein.

M&T BANK CORPORATION

FORM 10-Q

For the Quarterly Period Ended March 31, 2023

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PART I. FINANCIAL INFORMATION