X0306 5 2016-12-31 0 0 0 0000715579 ACNB CORP ACNB 0001271301 RITTER THOMAS A P.O. BOX 248 ARENDTSVILLE PA 17303 1 1 0 0 President & CEO ACNB COrporation Common 9130.707 D ACNB Corporation Common 3322.881 I Spouse The amount of securities beneficially owned was increased to include 61.41646 aggregate shares of common stock acquired in 2016 through the automatic reinvestment of dividends, which are exempt from the reporting requirements of Section 16 of the Securities Exchange Act of 1934. /s/ Thomas A. Ritter 2017-02-14