ACNB shareholders authorize doubling common shares to 40M at annual meeting

Proposal No. 1 – To Elect Class 3 Directors The shareholders voted to elect four (4) Class 3 Directors to serve for terms of three (3) years and until their successors are elected and qualified. The results of the vote were as follows: Nominee For Against Abstain Broker Non-Votes Kimberly S. Chaney 5,624,787 484,812 31,077 1,739,044 Frank Elsner, III 5,698,356 390,323 51,997 1,739,044 James P. Helt 5,706,078 371,452 63,146 1,739,044 John M. Polli 5,729,393 364,505 46,778 1,739,044

Proposal No. 4 - To Approve and Adopt an Amendment to the Articles of the Incorporation to Authorize Uncertificated Shares The shareholders voted to approve and adopt an amendment to the Amended and Restated Articles of Incorporation to authorized uncertificated shares. The results of the vote were as follows: For Against Abstain Broker Non-Votes 5,695,550 362,506 82,620 1,739,044

Proposal No. 5 - To Approve, Adopt and Ratify the ACNB Corporation Employee Stock Purchase Plan The shareholders voted to approve, adopt and ratify the ACNB Corporation Employee Stock Purchase Plan. The results of the vote were as follows: For Against Abstain Broker Non-Votes 5,978,500 115,628 46,548 1,739,044

Proposal No. 3 – To Approve and Adopt an Amendment to the Articles of Incorporation to Increase the Authorized Number of Shares of Common Stock The shareholders voted to approve and adopt an amendment to the Amended and Restated Articles of Incorporation to increase the authorized number of shares of common stock from 20,000,000 to 40,000,000. The results of the vote were as follows: For Against Abstain Broker Non-Votes 6,586,214 1,224,120 69,386 —

Proposal No. 2 – To Conduct a Non-Binding Vote on Executive Compensation The shareholders voted to approve, on a non-binding basis, the compensation paid to the Company’s Named Executive Officers. The results of the vote were as follows: For Against Abstain Broker Non-Votes 5,759,093 300,172 81,411 1,739,044

Proposal No. 6 - To Ratify the Selection of Crowe LLP as ACNB Corporation’s Independent Registered Public Accounting Firm The shareholders voted to ratify the selection of Crowe LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026. The results of the vote were as follows: For Against Abstain 7,807,001 47,897 24,822