UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No. ___)

Filed by the Registrant x

Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨    Preliminary Proxy Statement

¨    Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨    Definitive Proxy Statement

x    Definitive Additional Materials

¨    Soliciting Material pursuant to §240.14a-12

WILLIAM PENN BANCORPORATION

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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x         No fee required.

¨         Fee paid previously with preliminary materials.

¨         Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts! WILLIAM PENN BANCORPORATION 2022 Special Meeting Vote by May 9, 2022 11:59 PM ET. For shares held in a Plan, vote by May 5, 2022 11:59 PM ET. You invested in WILLIAM PENN BANCORPORATION and it’s time to vote! You have the right to vote on proposals being presented at the Special Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 10, 2022. Get informed before you vote View the Notice and Proxy Statement online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 26, 2022. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote in Person at the Meeting* May 10, 2022 10:00 a.m. Eastern Time The Stone Terrace by John Henry’s 2275 Kuser Road Hamilton, New Jersey 08690 *Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Smartphone users Point your camera here and vote without entering a control number V1.1 For complete information and to vote, visit www.ProxyVote.com Control # D76990-S41334-Z82043 WILLIAM PENN BANCORPORATION 10 CANAL STREET, SUITE 104 BRISTOL, PA 19007

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends D76991-S41334-Z82043 1. The approval of the William Penn Bancorporation 2022 Equity Incentive Plan. For