M&T Bank Corporation (Manufacturers and Traders Trust Company) is an American bank holding company headquartered in Buffalo, New York. It operates 780 branches in New York, New Jersey, Connecticut, Pennsylvania, Maryland, Massachusetts, Delaware, Virginia, West Virginia, and Washington, D.C. M&T is ranked 519th on the Fortune 500 list based on 2021 revenues. Until May 1998, the bank's holding company was named First Empire State Corporation.