Scott L. Kelley Ceases to be Director of ACNB Corp.

Scott L. Kelley has voluntarily filed this Form 4 to report that he retired from the board of directors of ACNB Corp. on May 5, 2026. As a result, he is no longer subject to Section 16 reporting requirements for the issuer. Following this change, Kelley holds 27,999.6123 shares of ACNB Corporation Common stock, which are directly owned. The filing was made on May 26, 2026.