UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 19, 2016

M&T BANK CORPORATION

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (716) 635-4000

Not Applicable

(Former name or former address, if changed since last report.)

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:

On April 20, 2016, M&T Bank Corporation (“M&T”) announced that its Board of Directors has approved certain officer appointments at M&T and its principal banking subsidiary, M&T Bank, which are effective May 2, 2016.

Vice Chairman René F. Jones will undertake new management responsibilities overseeing M&T Bank’s Mortgage and Consumer Lending business in addition to his continued oversight of M&T Bank’s Treasury function and the Wilmington Trust division, but will relinquish his position as Chief (Principal) Financial Officer of M&T and M&T Bank.

Darren J. King has been appointed Chief (Principal) Financial Officer of M&T and M&T Bank, succeeding Mr. Jones. Mr. King, age 46, joined M&T in 2000, serving in a number of management positions in Retail and Business Banking, including most recently as Executive Vice President and head of Retail Banking at M&T Bank. Prior to joining M&T, he held senior leadership roles at Mercer Management Consulting, predecessor firm to Oliver Wyman, where he was Vice President in the Financial Services Practice. Mr. King earned his Honors Business Administration (HBA) from the Richard Ivey School of Business at the University of Western Ontario.

These appointments were approved during a joint meeting of the Boards of Directors of M&T and M&T Bank on April 19, 2016.

The public announcement regarding these appointments was made by means of a news release, the text of which is set forth in Exhibit 99.1 to this Form 8-K and which is incorporated herein by reference.

2016 Annual Meeting of Shareholders

The 2016 Annual Meeting of Shareholders of M&T Bank Corporation (“M&T”) was held on April 19, 2016. At the 2016 Annual Meeting, shareholders approved all of the Board of Directors’ proposals which included (i) the election of sixteen (16) directors, all of whom were then serving as directors of M&T, for one-year terms and until their successors are elected and qualified; (ii) the approval of the compensation of M&T’s Named Executive Officers; and (iii) the ratification of the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm of M&T for the year ending December 31, 2016. The voting results for each proposal, including the votes for and against or withheld, and any abstentions or broker non-votes, are described below. Abstentions and broker non-votes (if applicable) were counted for purposes of determining whether a quorum was present, but were not treated as votes cast. Therefore, abstentions and broker non-votes (if applicable) did not have the effect of a vote for or against such proposal and were not counted in determining the number of votes required for approval.

The following table reflects the tabulation of the votes with respect to each director who was elected at the 2016 Annual Meeting:

The following table reflects the tabulation of the votes with respect to the approval of the compensation of M&T’s Named Executive Officers:

The following table reflects the tabulation of the votes with respect to the ratification of the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm of M&T for the year ending December 31, 2016:

SIGNATURES

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.

EXHIBIT INDEX