MPB 2025 Special Meeting Proxy Statement

• loan related matters; • related party transactions; • the vote required to approve the merger; • securities registration obligations; • intellectual property; • risk management instruments; • the absence of fiduciary or trust accounts; • the preparation and filing of the reports filed by each party with the Securities and Exchange Commission; and • the receipt by each party’s board of directors of the opinion of an investment banking firm regarding the exchange ratio. William Penn has also made representations and warranties to Mid Penn regarding material contracts, real estate leases and other certain types of contracts, labor matters and anti-takeover laws. The representations and warranties described above and included in the merger agreement were made by Mid Penn and William Penn to each other. These representations and warranties were made as of specific dates, may be subject to important qualifications and limitations agreed to by Mid Penn and William Penn in connection with negotiating the terms of the merger agreement (including by reference to information contained in disclosure schedules delivered by the parties under the merger agreement), and may have been included in the merger agreement for the purpose of allocating risk between Mid Penn and William Penn rather than to establish matters as facts. The merger agreement is described herein, and included as Annex A, only to provide you with information regarding its terms and conditions, and not to provide any other factual information regarding William Penn, Mid Penn or their respective businesses. Accordingly, the representations and warranties and other provisions of the merger agreement should not be read alone, but instead should be read only in conjunction with the information provided elsewhere in this joint proxy statement/prospectus and in the documents incorporated by reference into this joint proxy statement/prospectus. See “Incorporation of Certain Documents by Reference” on page 130. Certain representations and warranties of William Penn, William Penn Bank, Mid Penn and Mid Penn Bank are qualified as to “materiality” or “material adverse effect.” For purposes of the merger agreement, a “material adverse effect,” when used in reference to either William Penn, William Penn Bank, or Mid Penn, Mid Penn Bank, or the combined company (as the case may be) any event, circumstance, change, condition, development or occurrence that either individually or in the aggregate, has had or would reasonably be expected to have an effect that (i) is material and adverse to the assets, liabilities, financial condition, results of operations, properties or business of Mid Penn and certain of its subsidiaries taken as a whole, or William Penn and certain of its subsidiaries taken as a whole, respectively, or (ii) does or would materially impair the ability of either William Penn, on the one hand, or Mid Penn, on the other hand, to perform its obligations under the merger agreement or otherwise materially threaten or materially impede the timely consummation of the transactions contemplated by the merger agreement; provided that, with respect to clause (i) above, “material adverse effect” shall not be deemed to include the impact of the following on the assets, liabilities, business, properties, financial condition or results of operations of the parties and their respective subsidiaries: (a) changes in laws and regulations after the date hereof affecting banks or their holding companies generally, or interpretations thereof by courts or governmental entities that do not have a materially disproportionate impact on such party; (b) changes, after the date hereof, in GAAP or regulatory accounting principles generally applicable to financial institutions and their holding companies (and, in either case, any authoritative interpretations thereof) that do not have a materially disproportionate impact on such party; (c) actions and omissions of a party hereto (or of certain William Penn subsidiaries or Mid Penn subsidiaries, as applicable) taken with the prior written consent of the other party in furtherance of the transactions contemplated hereby or which are otherwise required by the terms hereof; (d) the 95

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