MPB 2025 Special Meeting Proxy Statement

INFORMATION ABOUT WILLIAM PENN BANCORPORATION Business William Penn Bancorporation William Penn Bancorporation is the bank holding company incorporated under the laws of Maryland for William Penn Bank, a full-service Pennsylvania chartered stock savings bank. William Penn is regulated by the Board of Governors of the Federal Reserve System. William Penn’s consolidated financial condition and results of operations consist almost entirely of that of William Penn Bank. At September 30, 2024, William Penn had total consolidated assets of $812.2 million with total deposits of $629.8 million and total shareholders’ equity of $128.3 million. William Penn common stock is traded on the Nasdaq Capital Market under the symbol “WMPN”. The principal executive offices of William Penn are located at 10 Canal Street, Suite 104, Bristol, Pennsylvania 19007 and its telephone number is (267) 540-8500. William Penn Bank William Penn Bank offers consumer and commercial banking services to individuals, businesses, and nonprofit organizations throughout the Delaware Valley area through twelve full-service branch offices in Bucks and Philadelphia Counties in Pennsylvania, and Burlington, Camden and Mercer Counties in New Jersey. William Penn Bank’s principal business consists of originating one- to four- family residential real estate mortgage loans, home equity lines of credit, residential construction loans, one- to four-family investor commercial real estate loans, non-residential real estate loans, multi-family loans and construction land loans. William Penn Bank is subject to regulation and supervision by the FDIC and the Pennsylvania Department of Banking and Securities. For more information about William Penn and William Penn Bank, please see “Where you can find more Information” on page 129. 119

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