X0306 4 2017-12-15 0 0000715579 ACNB CORP ACNB 0001710898 Seibel Donald Arthur Jr 1001 GREEN VALLEY ROAD NEW WINDSOR MD 21776 1 0 0 0 ACNB Corporation Common 2017-12-15 2017-12-19 4 P 0 77.9221 28.875 A 30131.9103 D ACNB Corporation Common 9759.8522 I Trust The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4). The amount of securities beneficially owned includes 0.577662 shares of common stock purchased for the same Transaction Date of December 15, 2017, 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 67.135584 shares of common stock purchased for the same Transaction Date of December 15, 2017, 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 Donald Arthur Seibel, Jr. 2017-12-20