ACNB CORPORATION ANNOUNCES SECOND QUARTER OF 2026 REGULAR AND SPECIAL CASH DIVIDENDS AND NEW SHARE REPURCHASE AUTHORIZATION (Form 8-K)

ACNB CORPORATION ANNOUNCES

SECOND QUARTER OF 2026 REGULAR AND SPECIAL CASH DIVIDENDS AND NEW SHARE REPURCHASE AUTHORIZATION

GETTYSBURG, PA, April 29, 2026 --- ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors approved a comprehensive update to its capital allocation strategy, including an increase in its regular quarterly cash dividend, a one-time special cash dividend, and a new share repurchase program.

"These actions reflect the Board's confidence in our solid balance sheet, strong operating performance, and the long-term growth prospects of our business," said James P. Helt, Chief Executive Officer of ACNB Corporation. "By simultaneously raising our quarterly dividend, declaring a special cash dividend, and initiating a new share repurchase program, we are demonstrating our commitment to driving superior value for our shareholders while maintaining the flexibility to invest in our strategic priorities. The declaration of a special dividend underscores a period of exceptional financial performance, and we are pleased that we can reward our shareholders with the surplus capital generated from our strong earnings."

Regular Quarterly Dividend Increase

The Board of Directors declared a regular quarterly cash dividend of $0.42 per share of ACNB Corporation common stock payable on June 15, 2026, to shareholders of record as of June 1, 2026. This per share amount reflects a 10.5% increase, or $0.04, over the $0.38 cash dividend paid in the first quarter of 2026, and a 23.5% increase over the $0.34 paid in the second quarter of 2025.

Special Cash Dividend

In addition to the regular quarterly dividend, the Board has declared a one-time special cash dividend of $0.50 per share of ACNB Corporation common stock payable on June 15, 2026, to shareholders of record as of June 1, 2026.

New Share Repurchase Authorization

ACNB Corporation has fully completed its share repurchase program previously authorized in June 2025, and the Board of Directors has approved a new plan to repurchase, in open market transactions at prevailing market prices, up to 310,000, approximately 3.0%, of the outstanding shares of ACNB's common stock. The amount and timing of any shares repurchased will be evaluated and determined by management in its discretion and will depend upon a number of factors, including ACNB's capital position, liquidity, financial performance and alternate uses of capital, the market price of ACNB's securities, general market and economic conditions, and applicable legal and regulatory requirements, with no guarantee as to the exact number of shares that will be repurchased. The common stock repurchases are expected to be funded by using available capital. Further, this new common stock repurchase program replaces and supersedes any and all earlier announced repurchase plans.

ACNB Corporation, headquartered in Gettysburg, PA, is the independent $3.27 billion financial holding company for the wholly-owned subsidiaries of ACNB Bank, Gettysburg, PA, including its operating divisions Traditions Bank and Traditions Mortgage, and ACNB Insurance Services, Inc.,

Westminster, MD. Originally founded in 1857, ACNB Bank serves its marketplace with banking and wealth management services, including trust and retail brokerage, via a network of 33 community banking offices and two Limited Purpose Offices located in the Pennsylvania counties of Adams, Cumberland, Franklin, Lancaster, York, and Berks and the Maryland counties of Baltimore, Carroll and Frederick. ACNB Insurance Services, Inc. is a full-service insurance agency with licenses in 46 states. The agency offers a broad range of property, casualty, health, life and disability insurance serving personal and commercial clients through office locations in Westminster, MD, and Gettysburg, PA. For more information regarding ACNB Corporation and its subsidiaries, please visit investor.acnb.com.

# # #