X0306 4 2020-09-15 0 0000715579 ACNB CORP ACNB 0001710848 Herring Todd L 4259 HARNEY ROAD TANEYTOWN MD 21787 1 0 0 1 Vice Chairman of the Board ACNB Corporation Common 2020-09-15 2020-09-17 4 A 0 265.9574 21.62 A 4575.7788 D ACNB Corporation Common 978.1336 I Trust ACNB Corporation Common 880 I Minor Trust ACNB Corporation Common 1052 I Spouse The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4). The shares represent stock received in lieu of director fees pursuant to a plan. The amount of securities beneficially owned includes 34.600370 shares of common stock purchased for the same Transaction Date of September 15, 2020, through the automatic reinvestment of dividends under the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan, which are exempt from the reporting requirements of Section 16 of the Securities Exchange Act of 1934. The amount of securities beneficially owned includes 11.181314 shares of common stock purchased for the same Transaction Date of September 15, 2020, through the automatic reinvestment of dividends under the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan, which are exempt from the reporting requirements of Section 16 of the Securities Exchange Act of 1934. /s/ Lynda L. Glass as POA for Todd L. Herring 2020-09-21