CITIZENS & NORTHERN CORP 10-Q

Item 5. Other Information The table below details the directors or executive officers for whom a written plan for the purchase of the Corporation’s common stock that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) became effective in the second quarter 2026. ​ ​ ​ ​ ​ ​ ​ Name ​ Title ​ Effective date ​ Expiration date Katherine W. Shattuck ​ Director ​ May 1, 2026 ​ April 30, 2027 Frank G. Pellegrino ​ Director ​ May 1, 2026 ​ April 30, 2027 The written plan provides for the directors to receive designated fees for their service as directors in the form of the Corporation’s common stock to be purchased in the open market by the Corporation’s transfer agent. Each of the directors identified above asserted they were not aware of material nonpublic information about the Corporation or its common stock at the time they adopted the written plan. Except as noted above, during the three months ended June 30, 2026, no director or officer of the Corporation adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement”, as each term is defined in Item 408(a) of Regulation S-K. 61 Table of Contents CITIZENS & NORTHERN CORPORATION – FORM 10-Q Item 6. Exhibits ​ ​ ​ ​ ​ ​ ​ 2.1 ​ ​ ​ Agreement and Plan of Merger dated April 23, 2025 between Susquehanna Community Financial, Inc. and Citizens & Northern Corporation ​ ​ ​ Incorporated by reference to Exhibit 2.1 of the Corporation’s Form 8-K filed April 23, 2025 ​ ​ ​ ​ ​ 3.1 ​ Articles of Incorporation ​ ​ ​ Incorporated by reference to Exhibit 3.1 of the Corporation’s Form 10-Q filed May 6, 2022 ​ ​ 3.2 ​ By-laws Incorporated by reference to Exhibit 3.1 of the Corporation’s Form 8-K filed February 18, 2022 ​ ​ ​ ​ ​ 10.1 ​ Form of Time-Based Restricted Stock agreement dated June 19, 2026 between the Corporation and William F. Van Sant, III pursuant to the Citizens & Northern Corporation 2023 Equity Incentive Plan ​ Filed herewith ​ ​ ​ ​ ​ 31. ​ Rule 13a-14(a)/15d-14(a) certifications: ​ ​ ​ ​ ​ 31.1 ​ Certification of Chief Executive Officer Filed herewith ​ ​ ​ ​ ​ 31.2 ​ Certification of Chief Financial Officer Filed herewith ​ ​ 32. ​ Section 1350 certifications Filed herewith ​ ​ 101.INS ​ Inline XBRL Instance Document. Filed herewith ​ ​ 101.SCH ​ Inline XBRL Schema Document. ​ Filed herewith ​ ​ 101.CAL ​ Inline XBRL Calculation Linkbase Document. ​ Filed herewith ​ ​ ​ ​ ​ 101.DEF ​ Inline XBRL Definition Linkbase Document. ​ Filed herewith ​ ​ ​ ​ ​ 101.LAB ​ Inline XBRL Label Linkbase Document. ​ Filed herewith ​ ​ ​ ​ ​ 101.PRE ​ Inline XBRL Presentation Linkbase Document. ​ Filed herewith ​ ​ ​ ​ ​ 104 ​ The cover page of the Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, formatted in Inline XBRL (contained in Exhibit 101). ​ Filed herewith ​ ​ ​ ​ 62 Table of Contents CITIZENS & NORTHERN CORPORATION – FORM 10-Q SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. CITIZENS & NORTHERN CORPORATION August 7, 2026 By: /s/ J. Bradley Scovill Date President and Chief Executive Officer August 7, 2026 By: /s/ Mark A. Hughes Date Treasurer and Chief Financial Officer ​ ​ ​ ​ 63