Company: MTB-PJ
Filing Date: 2025-10-30
Form Type: 424B5
Source: 0001193125-25-257002
Chunk: 1

Company: M&T BANK CORP
Filing Date: 2025-10-30
Form: 424B5
Chunk 1
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 event (as defined herein), in each case at a redemption price of $10,000 per share (equivalent to $25 per depositary share), plusany declared and unpaid dividends, without accumulation of any undeclared dividends. If we redeem any shares of Preferred Stock, the depositary will redeem a proportionate number of depositary shares. Neither the Preferred Stock nor the depositary shares are deposits or other obligations of a bank or are insured by the Federal Deposit Insurance Corporation or any other governmental agency. Neither the Securities and Exchange Commission nor any state securities commission, has approved or disapproved of the depositary shares or the underlying Preferred Stock or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense. Investing in the depositary shares and the underlying Preferred Stock involves risks. See “ Risk Factors” beginning on page S-6 ofthis prospectus supplement and “Item 1A—Risk Factors” of our Annual Report on Form 10-K forthe year ended December 31, 2024 for a discussion of certain risks that you should consider before investing in the depositary shares or the underlying Preferred Stock.

|                                          |     | Per              
 Depositary Share |    |       |     | Total |             |     |
|:-----------------------------------------|:----|:-----------------|---:|------:|:----|:------|------------:|----:|
| Public offering price(1)                 |     | $                | 25 | .0000 |     | $     | 450,000,000 | .00 |
| Underwriting discount(2)                 |     | $                |  0 | .4496 |     | $     |   8,092,123 | .25 |
| Proceeds, before expenses, to the issuer |     | $                | 24 | .5504 |     | $     | 441,907,876 | .75 |

| (1) | The public offering price set forth above does not include dividends, if any, that may be declared. Dividends,    
 if declared, will be calculated from the date of the original issuance, which is expected to be October 31, 2025. |

| (2) | Reflects 11,316,980 depositary shares sold to institutional investors, for which the underwriters receive an                                                                                                  
 underwriting discount of $0.2500 per depositary share, and 6,