Director — Gregory B. Braca: The filing announces the appointment of a new independent director with significant banking experience, which is a board addition rather than an executive departure.

Mr. Stewart: A change in control agreement was entered into, providing severance benefits for Mr. Stewart.

OTHER EVENTS Dividend Declaration On July 22, 2026, the Corporation announced that its Board of Directors declared a quarterly cash dividend of $0.23 per common share payable on August 14, 2026 to shareholders of record as of August 3, 2026.

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On July 22, 2026, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended June 30, 2026. A copy of the Corporation’s press release dated July 22, 2026 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

OTHER EVENTS Extension of Treasury Stock Repurchase Program On April 21, 2026, the Board of Directors of Mid Penn Bancorp, Inc. (the “Corporation”) approved the renewal of the Corporation’s treasury stock repurchase program through April 30, 2027, as well as an increase in the number of shares available for future repurchases under the program. As modified, the repurchase program authorizes the Corporation to repurchase up to an additional $50 million of Corporation common stock, from time to…

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On April 21, 2026, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended March 31, 2026. A copy of the Corporation’s press release dated April 21, 2026 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

Class A director — Thomas R. Brugger: Mr. Brugger was appointed as a Class A director of Mid Penn and Mid Penn Bank in connection with the Merger.

Completion of Acquisition or Disposition of Assets. The information set forth in the Introductory Note of this Current Report on Form 8-K is incorporated by reference into this

OTHER EVENTS Dividend Declaration On January 21, 2026, the Corporation announced that its Board of Directors declared a quarterly cash dividend of $0.22 per common share payable on February 17, 2026 to shareholders of record as of February 6, 2026. On January 21, 2026, the Corporation announced that its Board of Directors declared a special cash dividend of $0.05 per common share payable on February 17, 2026 to shareholders of record as of February 6, 2026.

OTHER EVENTS Dividend Declaration On January 21, 2026, the Corporation announced that its Board of Directors declared a quarterly cash dividend of $0.22 per common share payable on February 17, 2026 to shareholders of record as of February 6, 2026 .

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On January 21, 2026, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended December 31, 2025. A copy of the Corporation’s press release dated January 21, 2026 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

Chief Operating Officer — Dana R. Stewart: Mr. Dana R. Stewart was appointed as the Chief Operating Officer.

Other Events. On January 1, 2026, Mid Penn Bancorp, Inc. (“Mid Penn”), the holding company for Mid Penn Bank, completed its acquisition of Cumberland Advisors, Inc. (“Cumberland Advisors”), a registered investment advisory firm headquartered in Sarasota, Florida, with approximately $3.2 billion in assets under management, through the merger of Cumberland Advisors with and into a newly formed acquisition subsidiary of Mid Penn (the “Merger”). The Merger was completed in accordance with the ter…

Change in Registrant’s Certifying Accountant (a) On December 23, 2025, Mid Penn Bancorp, Inc. (the “Company”) dismissed RSM US LLP (“RSM”) as its independent registered public accounting firm, to be effective upon the completion of the audit for the fiscal year ending December 31, 2025. The dismissal of RSM was approved by the Audit Committee of the Board of Directors of the Company. The audit reports of RSM on the consolidated financial statements of the Company as of and for the fiscal year…

Rory G. Ritrievi: The filing details new compensatory arrangements for the CEO, including a split dollar agreement and supplemental executive retirement plan.

OTHER EVENTS Dividend Declaration On October 22, 2025, the Corporation announced that its Board of Directors declared a quarterly cash dividend of $0.22 per common share payable on November 24, 2025 to shareholders of record as of November 10, 2025.

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On October 22, 2025, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended September 30, 2025. A copy of the Corporation’s press release dated October 22, 2025 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

Other Events. On September 25, 2025, Mid Penn announced that it had entered into an Agreement and Plan of Reorganization (the “Acquisition Agreement”) with Cumberland Advisors, Inc. (“Cumberland Advisors”), a registered investment advisory firm headquartered in Sarasota, Florida with approximately $3.3 billion in assets under management. In accordance with the Acquisition Agreement, Mid Penn will acquire Cumberland via the merger of Cumberland with and into a newly formed acquisition subsidia…

Entry into a Material Definitive Agreement. On September 24, 2025, Mid Penn Bancorp, Inc., a Pennsylvania corporation (“Mid Penn”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with 1st Colonial Bancorp, Inc., a Pennsylvania corporation (“1st Colonial”). The Merger Agreement provides that, upon the terms and conditions set forth therein, 1st Colonial will merge with and into Mid Penn (the “Merger”), with Mid Penn continuing as the surviving corporation in the Merger.…

The filing details amendments to retirement and change in control agreements for certain executives.

OTHER EVENTS Dividend Declaration On July 23, 2025, the Corporation announced that its Board of Directors declared a quarterly cash dividend of $0.20 per common share payable on August 25, 2025 to shareholders of record as of August 8, 2025.

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On July 23, 2025, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended June 30, 2025. A copy of the Corporation’s press release dated July 23, 2025 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

Other Events As previously announced, Mid Penn Bancorp, Inc. (“Mid Penn”) and William Penn Bancorporation (“William Penn”) have received all regulatory and shareholder approvals required to consummate the merger of William Penn with and into Mid Penn. The parties expect to complete the merger on or about April 30, 2025, subject to the satisfaction or waiver of customary closing conditions. Safe Harbor for Forward-Looking Statements This document may contain forward-looking statements as defin…

RESULTS OF OPERATIONS AND FINANCIAL CONDITION On April 23, 2025, Mid Penn Bancorp, Inc. (the "Corporation") issued a press release discussing its financial results for the quarter ended March 31, 2025. A copy of the Corporation’s press release dated April 23, 2025 is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

OTHER EVENTS Extension of Treasury Stock Repurchase Program On April 23, 2025, the Board of Directors of Corporation approved the renewal of the Corporation’s treasury stock repurchase program, which was originally announced on March 19, 2020. The repurchase program, which authorized the repurchase of up to $15 million, of which approximately $5 million remains available, of Corporation common stock in open market or privately negotiated transactions, has been extended through April 30, 2026.…