ACNB / ACNB Corporation - Depositi SEC, Relazione annuale, dichiarazione di delega

Table 1: Newly Registered Securities

Calculation of Filing Fee Tables S-8 ACNB CORP Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Common Stock, $2.

As filed with the Securities and Exchange Commission on May 8, 2026.

As filed with the Securities and Exchange Commission on May 8, 2026. Registration 333- United States Securities and Exchange Commission Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania (State or other jurisdiction of incorporation or organization) 23-2233457 (IRS Employer Ide

ACNB Corporation Amended and Restated Articles of Incorporation

Exhibit 3.1 ACNB Corporation Amended and Restated Articles of Incorporation In compliance with the requirements of 15 Pa.C.S. Section 1306 (relating to Articles of Incorporation), the undersigned, desiring to be incorporated as a business corporation, hereby state that: 1. The name of the Corporation is ACNB Corporation. 2. The address, including street and number, if any, of this Corporation’s re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

ACNB Corporation Annual Meeting of Shareholders May 5, 2026 Alan J. Stock Chairman of the Board Welcome & Introductions 2 Board of Directors James P. Helt D. Arthur Seibel, Jr. Alan J. Stock Chairman of the Board Todd L. Herring First Vice Chair of t

a2026annualshareholderme ACNB Corporation Annual Meeting of Shareholders May 5, 2026 Alan J.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2026 ACNB Corporation (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Num

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2026 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

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

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] 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 I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2026 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2026 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 23, 2026 --- ACNB Corporation (NASDAQ

pressrelease2026-q1final PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2026 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 23, 2026 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net

ARS

1 2025 ANNUAL REVIEW 1 202 5 ANNUAL REVIEW BUILDING A STRONGER TOMORROWWe believe progress begins with people.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the Appropriate Box: ☐ Preliminary Proxy

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the Appropriate Box: ☒ Preliminary Proxy

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2026 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS RESTRICTED STOCK AGREEMENT (“Agreement”), dated effective March 13, 2026 (“Grant Date”), by and among ACNB Bank (“Bank”), ACNB Corporation (“Corporation”), and (“Participant”), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB

1 ACNB CORPORATION 5.875% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE MARCH 15, 2036 THE INDEBTEDNESS EVIDENCED BY THIS SUBORDINATED NOTE IS NOT A DEPOSIT AND IS NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY

projectapple-xformofsubn 1 ACNB CORPORATION 5.875% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE MARCH 15, 2036 THE INDEBTEDNESS EVIDENCED BY THIS SUBORDINATED NOTE IS NOT A DEPOSIT AND IS NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY OR FUND. THE INDEBTEDNESS EVIDENCED BY THIS SUBORDINATED NOTE IS SUBORDINATED AND JUNIOR IN RIGHT OF PAYMENT TO SENIOR INDEB

Execution Copy SUBORDINATED NOTE PURCHASE AGREEMENT 5.875% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE MARCH 15, 2036 This SUBORDINATED NOTE PURCHASE AGREEMENT (this “Agreement”) is dated as of March 12, 2026 and is made by and among ACNB Corporatio

projectapple-formnotepur Execution Copy SUBORDINATED NOTE PURCHASE AGREEMENT 5.875% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE MARCH 15, 2036 This SUBORDINATED NOTE PURCHASE AGREEMENT (this “Agreement”) is dated as of March 12, 2026 and is made by and among ACNB Corporation, a Pennsylvania corporation (the “Company”), and the several purchasers of the Subordinated Notes (as defined herein) ident

A C N B C O R P O R A T I O N Subordinated Notes Investor Presentation March 2026 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Confidentiality Notice and Disclaimers • This presentation has been prepared solely for informational purposes

ex991-finalinvestorprese A C N B C O R P O R A T I O N Subordinated Notes Investor Presentation March 2026 Nasdaq: ACNB investor.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year-ended December 31, 2025 OR ☐ TRANSACTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of incorporation or organization) (I.

SUBSIDIARIES OF THE REGISTRANT

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT The Registrant has the following subsidiaries: ACNB Bank, a Pennsylvania state-chartered commercial bank and trust company and ACNB Insurance Services, Inc., incorporated in the State of Maryland.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2026 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2026 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

Ex. 99.1 FIRST AMENDMENT TO AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO AMENDED AND RESTATED EMPLOYMENT AGREEMENT (“First Amendment”) is made this 19th day of February, 2026, by and among ACNB CORPORATION, a Pennsylvania busines

ex991-firstamendmenttoam Ex. 99.1 FIRST AMENDMENT TO AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO AMENDED AND RESTATED EMPLOYMENT AGREEMENT (“First Amendment”) is made this 19th day of February, 2026, by and among ACNB CORPORATION, a Pennsylvania business corporation (the “Corporation”), ACNB BANK, a state-chartered bank (the “Bank”) and JASON H. WEBER, an adult individual (“E

Ex. 99.2 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (“First Amendment”) is made this 19th day of February, 2026 by and among ACNB CORPORATION, a Pennsylvania business corporation (the “Corporation”), ACNB BAN

ex992-firstamendmenttoem Ex. 99.2 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (“First Amendment”) is made this 19th day of February, 2026 by and among ACNB CORPORATION, a Pennsylvania business corporation (the “Corporation”), ACNB BANK, a state-chartered bank (the “Bank”) and BRETT D. FULK, an adult individual (“Executive”) residing in Pennsylvania. WITNESS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2026 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2026 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FIRST QUARTER OF 2026 CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES FIRST QUARTER OF 2026 CASH DIVIDEND GETTYSBURG, PA, January 29, 2026 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of

PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS FOURTH QUARTER AND RECORD 2025 FINANCIAL RESULTS GETTYSBURG, PA, January 22, 2026 --- ACNB Corpo

pressrelease2025-q4finan PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS FOURTH QUARTER AND RECORD 2025 FINANCIAL RESULTS GETTYSBURG, PA, January 22, 2026 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc.,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 22, 2026 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 22, 2026 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 2, 2025 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 2, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 10, 2025 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 10, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

A C N B C O R P O R A T I O N Investor Presentation Third Quarter of 2025 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

acnbirdeck3q25-final A C N B C O R P O R A T I O N Investor Presentation Third Quarter of 2025 Nasdaq: ACNB investor.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2025 THIRD QUARTER FINANCIAL RESULTS GETTYSBURG, PA, October 23, 2025 --- ACNB Corporation (NASD

pressrelease2025-q3finan PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2025 THIRD QUARTER FINANCIAL RESULTS GETTYSBURG, PA, October 23, 2025 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2025 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2025 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FOURTH QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES FOURTH QUARTER CASH DIVIDEND GETTYSBURG, PA, October 22, 2025 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2025 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB BANK 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN EFFECTIVE NOVEMBER 1, 2023 Pursuant to due authorization by its Board of Directors, the undersigned, ACNB BANK (the “Bank”), located in Gettysburg, PA, adopted the following 2023 EXECUTIVE SUP

a993acnbbank2023executiv ACNB BANK 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN EFFECTIVE NOVEMBER 1, 2023 Pursuant to due authorization by its Board of Directors, the undersigned, ACNB BANK (the “Bank”), located in Gettysburg, PA, adopted the following 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN (the “Plan”) as of the 1st day of November, 2023.

Security Type

Calculation of Filing Fee Tables S-3 ACNB CORP Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Common Stock, $2.

As filed with the Securities and Exchange Commission on August 8, 2025

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on August 8, 2025 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2025 SECOND QUARTER FINANCIAL RESULTS GETTYSBURG, PA, July 24, 2025 --- ACNB Corporation (NASDAQ

pressrelease2025-q2finan PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2025 SECOND QUARTER FINANCIAL RESULTS GETTYSBURG, PA, July 24, 2025 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2025 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2025 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND GETTYSBURG, PA, July 23, 2025 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors a

ACNB CORPORATION ANNOUNCES COMMON STOCK REPURCHASE PROGRAM

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES COMMON STOCK REPURCHASE PROGRAM GETTYSBURG, PA, June 18, 2025 - ACNB Corporation (“ACNB”) (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 17, 2025 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 17, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

A C N B C O R P O R A T I O N Investor Presentation Second Quarter of 2025 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

A C N B C O R P O R A T I O N Investor Presentation Second Quarter of 2025 Nasdaq: ACNB investor.

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 30, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

ACNB Corporation Annual Meeting of Shareholders May 6, 2025 Welcome & Introductions Alan J. Stock Chairman of the Board 2 Board of Directors James P. Helt Scott L. Kelley James J. Lott Donna M. Newell Daniel W. PottsJohn M. Polli D. Arthur Seibel, Jr

a2025acnbshareholdermeet ACNB Corporation Annual Meeting of Shareholders May 6, 2025 Welcome & Introductions Alan J.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 ACNB Corporation (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Num

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2025 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB CORPORATION REPORTS 2025 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2025 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 24, 2025 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced a net loss of $

ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND GETTYSBURG, PA, April 23, 2025 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 22, 2025 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 22, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

Exhibit 99.2 UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS The unaudited pro forma combined consolidated financial information has been prepared using the acquisition method of accounting under the provisions of the Financial Accounting Standards Board Accounting Standards Codification 805, “Business Combinations”, giving effect to the merger of Traditions Bancorp, Inc. (“Traditions”) with and

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 2) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporat

Traditions Bancorp, Inc.

Exhibit 99.1 Traditions Bancorp, Inc. Contents Independent Auditor’s Report 2 - 3 Consolidated Financial Statements Consolidated Balance Sheets 5 Consolidated Statements of Income 6 Consolidated Statements of Comprehensive Income 7 Consolidated Statements of Shareholders’ Equity 8 Consolidated Statements of Cash Flows 9 Notes to Consolidated Financial Statements 10 - 57 1 Independent Auditor’s Rep

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the Appropriate Box: ☐ Preliminary Proxy

ARS

2024 ANNUAL REVIEW AT HEARTWe are deeply committed to the people and places we serve, working to support the diverse needs of families, businesses, and local organizations through personalized service, strong relationships, and community investment.

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS RESTRICTED STOCK AGREEMENT (“Agreement”), dated effective March 14, 2025 (“Grant Date”), by and among ACNB Bank (“Bank”), ACNB Corporation (“Corporation”), and (“Participant”), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 14, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

Salary Continuation Agreement by and between ACNB Bank and Brett D. Fulk dated as of September 6, 2022. (Incorporated by reference to Exhibit 10.33 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Commission on March 14, 2025.)

Exhibit 10.33 ACNB BANK SALARY CONTINUATION AGREEMENT THIS AGREEMENT is made this 6 day of September, 2022 by and between ACNB BANK, located in Gettysburg, Pennsylvania, and BRETT D. FULK (“Executive”). INTRODUCTION To encourage the Executive to remain an employee of the Bank and to provide benefits in excess of the limitations imposed on qualified plans, the Bank is willing to provide additional

Subsidiaries of the Registrant.

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT The Registrant has the following subsidiaries: ACNB Bank, a Pennsylvania state-chartered commercial bank and trust company and ACNB Insurance Services, Inc., incorporated in the State of Maryland.

Insider Trading Policy

Exhibit 19 ACNB CORPORATION INSIDER TRADING POLICY STATEMENT EXECUTIVE SUMMARY •The Policy applies to Directors and Executive Officers of ACNB Corporation, as well as Directors and Executive Officers of any ACNB Corporation subsidiary as designated by the ACNB Corporation Board of Directors, and employees of ACNB Corporation or a subsidiary who are in possession of Material Inside Information.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year-ended December 31, 2024 OR ☐ TRANSACTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of incorporation or organization) (I.

Deferred Compensation Agreement by and between ACNB Bank and Brett D. Fulk dated as of September 6, 2022. (Incorporated by reference to Exhibit 10.34 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Commission on March 14, 2025.)

Exhibit 10.34 DEFERRED COMPENSATION AGREEMENT THIS DEFERRED COMPENSATION AGREEMENT (this "Agreement"), adopted this 6 day of September, 2022, by and between ACNB Bank, located in Gettysburg, Pennsylvania (the "Employer"), and Brett D. Fulk (the "Executive"), formalizes the agreements and understanding between the Employer and the Executive. WITNESSETH: WHEREAS, the Executive is employed by the Emp

Employment Agreement by and between ACNB Corporation, ACNB Bank and Brett D. Fulk dated as of September 6, 2022. (Incorporated by reference to Exhibit 10.32 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Commission on March 14, 2025.)

Exhibit 10.32 EMPLOYMENT AGREEMENT THIS AGREEMENT is made effective as of the 6th day of September, 2022, by and among ACNB CORPORATION (“Corporation”), a Pennsylvania business corporation having a principle place of business at 16 Lincoln Square, Gettysburg, Pennsylvania 17325, ACNB BANK (“Bank”), a Pennsylvania state-chartered bank having a place of business at 16 Lincoln Square, Gettysburg, Pen

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporat

CORRECTION - ACNB Corporation announceS Completion of Traditions BANCORP, inc. Acquisition

Exhibit 99.1 Press Release FOR IMMEDIATE RELEASE Contact: Kevin Hayes SVP/ General Counsel, Secretary, and Chief Governance Officer 717.339.5161 [email protected] CORRECTION - ACNB Corporation announceS Completion of Traditions BANCORP, inc. Acquisition GETTYSBURG, PA, February 04, 2025 (GLOBE NEWSWIRE) - In a release issued under the same headline on February 3, 2025 by ACNB Corporation please note

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

Separation and Non-Competition Agreement dated as of January 23, 2025 by and among ACNB Corporation, ACNB Bank, Traditions Bancorp, Inc., Traditions Bank and Eugene J. Draganosky effective February 1, 2025.

Exhibit 10.1 Execution Version SEPARATION AND NON-COMPETITION AGREEMENT THIS SEPARATION AND NON-COMPETITION AGREEMENT (the “Agreement”) is made this 23rd day of January 2025, by and among ACNB Corporation (“ACNB”), ACNB Bank, Traditions Bancorp, Inc. (“TBI”), Traditions Bank (“Traditions Bank”), and Eugene J. Draganosky (the “Executive”) on the terms and conditions set forth below: WHEREAS, the Ex

ACNB Corporation announceS Completion of Traditions BANCORP, inc. Acquisition

Exhibit 99.1 Press Release FOR IMMEDIATE RELEASE Contact: Kevin Hayes SVP/ General Counsel, Secretary, and Chief Governance Officer 717.339.5161 [email protected] ACNB Corporation announceS Completion of Traditions BANCORP, inc. Acquisition GETTYSBURG, PA, February 3, 2025 - ACNB Corporation (NASDAQ: ACNB), the parent financial holding company of ACNB Bank, a Pennsylvania state-chartered, FDIC-insur

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 28, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND GETTYSBURG, PA, January 29, 2025 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Director

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 23, 2025 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION REPORTS FOURTH QUARTER AND 2024 FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS FOURTH QUARTER AND 2024 FINANCIAL RESULTS GETTYSBURG, PA, January 23, 2025 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net inco

LETTER

December 19, 2024 Jason H. Weber Chief Financial Officer ACNB Corporation 16 Lincoln Square Gettysburg, PA 17325 Re: ACNB Corporation Form 10-K for Fiscal Year Ended December 31, 2023 File No. 001-35015 Dear Jason H. Weber: We have completed our review of your filing. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstandi

FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary, and Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION AND TRADITIONS BANCORP, INC. ANNOUNCE RECEIPT OF SHAREHOLDER APPROVALS FOR ACQUISITION GETTYSBURG

FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary, and Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION AND TRADITIONS BANCORP, INC. ANNOUNCE RECEIPT OF SHAREHOLDER APPROVALS FOR ACQUISITION GETTYSBURG, PA, December 19, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB”), the parent financial holding company of ACNB Bank, a Pennsylvania state-chartered,

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 18, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

ACNB CORPORATION 16 Lincoln Square Gettysburg, PA 17325

ACNB CORPORATION 16 Lincoln Square Gettysburg, PA 17325 December 18, 2024 VIA EDGAR U.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 12, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 12, 2024 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 12, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

LETTER

December 11, 2024 Jason H. Weber Chief Financial Officer ACNB Corporation 16 Lincoln Square Gettysburg, PA 17325 Re: ACNB Corporation Form 8-K Filed October 24, 2024 File No. 001-35015 Dear Jason H. Weber: We have limited our review of your filing to the financial statements and related disclosures and have the following comments. Please respond to this letter within ten business days by providing

ACNB / ACNB Corporation / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 UnitedStates13GACNBCorpUS.txt 240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* (Name of Issuer) ACNB Corp (Title of Class of Securities) Com

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 12, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary, and Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION RECEIVES REGULATORY APPROVALS TO ACQUIRE TRADITIONS BANCORP, INC. GETTYSBURG, PA, November 12, 20

FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary, and Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION RECEIVES REGULATORY APPROVALS TO ACQUIRE TRADITIONS BANCORP, INC. GETTYSBURG, PA, November 12, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB”), the parent financial holding company of ACNB Bank, a Pennsylvania state-chartered, FDIC insured communi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

A C N B C O R P O R A T I O N Investor Presentation Third Quarter of 2024 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

A C N B C O R P O R A T I O N Investor Presentation Third Quarter of 2024 Nasdaq: ACNB investor.

ACNB / ACNB Corporation / VANGUARD GROUP INC Passive Investment

240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. )* (Name of Issuer) ACNB Corp (Title of Class of Securities) Common Stock (CUSIP Number) 000868109 (Date o

Merger Proposal — Your Vote Is Very Important

TABLE OF CONTENTS   Filed Pursuant to 424(b)(3)   Registration No. 333-282412 Merger Proposal — Your Vote Is Very Important To the Shareholders of ACNB Corporation and Traditions Bancorp, Inc.: The boards of directors of ACNB Corporation (“ACNB”) and Traditions Bancorp, Inc. (“Traditions”) have approved an Agreement and Plan of Reorganization, dated as of July 23, 2024 (the “reorganization agreeme

ACNB CORPORATION REPORTS 2024 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2024 THIRD QUARTER FINANCIAL RESULTS GETTYSBURG, PA, October 24, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net income of

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 24, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

Form of Proxy for Special Meeting of Shareholders of ACNB Corporation

Exhibit 99.3 2024 PLEASE DO NOT RETURN THE PROXY CARD IF YOU ARE VOTING ONLINE OR BY PHONE. FOLD HERE • DO NOT SEPARATE • INSERT IN ENVELOPE PROVIDED Proposal 1: To approve the issuance of shares of ACNB Corporation (“ACNB”) common stock in connection with the merger of Traditions Bancorp, Inc. with and into ACNB South Acquisition Subsidiary, LLC, a wholly-owned subsidiary of ACNB, as contemplated

ACNB Corporation Letter to Shareholders

Exhibit 99.8 [DATE] Dear Fellow Shareholders of ACNB Corporation: On behalf of the Board of Directors, I am pleased to announce a Special Meeting of Shareholders to be held on Wednesday, December 18, 2024, at 3:00 p.m., local time, to be held virtually via live webcast at https://www.cstproxy.com/acnb/sm2024. Please see the enclosed Notice of Special Meeting of Shareholders for further instruction

Consent of Hovde Group, LLC

Exhibit 99.1 CONSENT OF HOVDE GROUP, LLC We hereby consent to the inclusion of our opinion letter, dated July 23, 2024, to the Board of Directors of ACNB Corporation, as Annex B to the joint proxy statement/prospectus which forms a part of the Registration Statement on Form S-4 of ACNB Corporation, and to the references to our name and to the description of such opinion in the joint proxy statemen

Form of Proxy for Special Meeting of Shareholders of Traditions Bancorp, Inc.

Exhibit 99.4 1UPX Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. 04211C + + A Proposals — The Board of Directors recommends a vote FOR Proposals 1 and 2. 1. APPROVAL OF THE MERGER PROPOSAL. To approve and adopt the Agreement and Plan of Reorganization, dated as of July 23, 2024, by and among ACNB Corporation, ACNB South

As filed with the Securities and Exchange Commission on October 23, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on October 23, 2024 Registration No.

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 October 23, 2024

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 October 23, 2024 U.

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FOURTH QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES FOURTH QUARTER CASH DIVIDEND GETTYSBURG, PA, October 16, 2024 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directo

LETTER

October 3, 2024 James P. Helt Chief Executive Officer ACNB Corporation 16 Lincoln Square Gettysburg, PA 17325 Re: ACNB Corporation Registration Statement on Form S-4 Filed September 30, 2024 File No. 333-282412 Dear James P. Helt: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. W

Consent of John M. Polli

Exhibit 99.7 CONSENT OF PROPOSED DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, and in connection with the Registration Statement on Form S-4 (the “Registration Statement”) of ACNB Corporation (“ACNB”) relating to the transactions contemplated by the Agreement and Plan of Reorganization, dated as July 23, 2024, by and among ACNB, ACNB South Acquisiti

Consent of Eugene J. Draganosky

Exhibit 99.6 CONSENT OF PROPOSED DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, and in connection with the Registration Statement on Form S-4 (the “Registration Statement”) of ACNB Corporation (“ACNB”) relating to the transactions contemplated by the Agreement and Plan of Reorganization, dated as July 23, 2024, by and among ACNB, ACNB South Acquisiti

Consent of Hovde Group, LLC

Exhibit 99.1 CONSENT OF HOVDE GROUP, LLC We hereby consent to the inclusion of our opinion letter, dated July 23, 2024, to the Board of Directors of ACNB Corporation, as Annex B to the joint proxy statement/prospectus which forms a part of the Registration Statement on Form S-4 of ACNB Corporation, and to the references to our name and to the description of such opinion in the joint proxy statemen

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-4 Registration Statement Under the Securities Act of 1933 (Form Type) ACNB Corporation (Exact Name of Registrant as Specified in its Charter) Table 1- Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial effective date Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid Equity Common Stock, $2.

Consent of Stephens Inc.

Exhibit 99.2 CONSENT OF STEPHENS INC. We hereby consent to the inclusion of our opinion letter to the Board of Directors of Traditions Bancorp, Inc. (the “Company”) as an Appendix to the Proxy Statement/Prospectus relating to the proposed merger of the Company with and into ANCB Corporation contained in the Registration Statement on Form S-4, as filed with the Securities and Exchange Commission, a

As filed with the Securities and Exchange Commission on September 30, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on September 30, 2024 Registration No.

Consent of Elizabeth F. Carson

Exhibit 99.5 CONSENT OF PROPOSED DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, and in connection with the Registration Statement on Form S-4 (the “Registration Statement”) of ACNB Corporation (“ACNB”) relating to the transactions contemplated by the Agreement and Plan of Reorganization, dated as July 23, 2024, by and among ACNB, ACNB South Acquisiti

A C N B C O R P O R A T I O N Investor Presentation Second Quarter of 2024 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

A C N B C O R P O R A T I O N Investor Presentation Second Quarter of 2024 Nasdaq: ACNB investor.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 23, 2024 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

Investor Presentation Announcing the Strategic Acquisition of Traditions Bancorp, Inc. Nasdaq: ACNB investor.acnb.com ACNB CORPORATIONJuly 24, 2024 Forward‐Looking Statements & Additional Disclosures 2 Forward Looking Statements: This presentation co

Exhibit 99.2 Investor Presentation Announcing the Strategic Acquisition of Traditions Bancorp, Inc. Nasdaq: ACNB investor.acnb.com ACNB CORPORATIONJuly 24, 2024 Forward‐Looking Statements & Additional Disclosures 2 Forward Looking Statements: This presentation contains statements which, to the extent that they are not recitations of historical fact may constitute forward‐looking statements for pur

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2024 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

Agreement and Plan of Reorganization by and among ACNB Corporation, ACNB South Acquisition Subsidiary, LLC, ACNB Bank, Traditions Bancorp, Inc. and Traditions Bank dated as of July 23, 2024. (Incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K, filed with the Commission on July 24, 2024.) Schedules are omitted; the Registrant agrees to furnish copies of Schedules to the Securities and Exchange Commission upon request.

Exhibit 2.1 Execution Copy AGREEMENT AND PLAN OF REORGANIZATION By and Among ACNB CORPORATION, ACNB SOUTH ACQUISITION SUBSIDIARY, LLC, ACNB BANK, TRADITIONS BANCORP, INC. And TRADITIONS BANK July 23, 2024 TABLE OF CONTENTS Page ARTICLE I THE MERGER 2 Section 1.01 Definitions 2 Section 1.02 The Merger 11 ARTICLE II REPRESENTATIONS AND WARRANTIES OF TRADITIONS AND TRADITIONS BANK 19 Section 2.01 Sta

ACNB CORPORATION ANNOUNCES STRATEGIC ACQUISITION OF TRADITIONS BANCORP, INC.

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer ACNB 717.339.5090 [email protected] Suzanne M. Becker Executive Administrative Officer Traditions 717-747-2647 [email protected] ACNB CORPORATION ANNOUNCES STRATEGIC ACQUISITION OF TRADITIONS BANCORP, INC. GETTYSBURG, PA, July 24, 2024 ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the

ACNB CORPORATION ANNOUNCES STRATEGIC ACQUISITION OF TRADITIONS BANCORP, INC.

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer ACNB 717.339.5090 [email protected] Suzanne M. Becker Executive Administrative Officer Traditions 717-747-2647 [email protected] ACNB CORPORATION ANNOUNCES STRATEGIC ACQUISITION OF TRADITIONS BANCORP, INC. GETTYSBURG, PA, July 24, 2024 ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the

ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND GETTYSBURG, PA, July 24, 2024 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors a

Investor Presentation Announcing the Strategic Acquisition of Traditions Bancorp, Inc. Nasdaq: ACNB investor.acnb.com ACNB CORPORATIONJuly 24, 2024 Forward‐Looking Statements & Additional Disclosures 2 Forward Looking Statements: This presentation co

Exhibit 99.2 Investor Presentation Announcing the Strategic Acquisition of Traditions Bancorp, Inc. Nasdaq: ACNB investor.acnb.com ACNB CORPORATIONJuly 24, 2024 Forward‐Looking Statements & Additional Disclosures 2 Forward Looking Statements: This presentation contains statements which, to the extent that they are not recitations of historical fact may constitute forward‐looking statements for pur

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

ACNB CORPORATION REPORTS 2024 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2024 SECOND QUARTER FINANCIAL RESULTS GETTYSBURG, PA, July 24, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net income of $

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

Agreement and Plan of Reorganization by and among ACNB Corporation, ACNB South Acquisition Subsidiary, LLC, ACNB Bank, Traditions Bancorp, Inc., and Traditions Bank dated as of July 23, 2024 (schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K. ACNB Corporation agrees to furnish supplementally to the SEC a copy of any omitted schedule upon request).

Exhibit 2.1 Execution Copy AGREEMENT AND PLAN OF REORGANIZATION By and Among ACNB CORPORATION, ACNB SOUTH ACQUISITION SUBSIDIARY, LLC, ACNB BANK, TRADITIONS BANCORP, INC. And TRADITIONS BANK July 23, 2024 TABLE OF CONTENTS Page ARTICLE I THE MERGER 2 Section 1.01 Definitions 2 Section 1.02 The Merger 11 ARTICLE II REPRESENTATIONS AND WARRANTIES OF TRADITIONS AND TRADITIONS BANK 19 Section 2.01 Sta

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2024 ACNB Corporation (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

A C N B C O R P O R A T I O N Investor Presentation First Quarter of 2024 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

acnbirdeck3-31x24xfinal A C N B C O R P O R A T I O N Investor Presentation First Quarter of 2024 Nasdaq: ACNB investor.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2024 ACNB Corporation (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Num

ACNB Corporation Annual Meeting of Shareholders May 7, 2024 Welcome & Introductions Alan J. Stock Chairman of the Board 2 Board of Directors Alan J. Stock Chairman of the Board Scott L. Kelley James P. Helt D. Arthur Seibel, Jr. Kimberly S. Chaney Do

acnbshareholdermtg ACNB Corporation Annual Meeting of Shareholders May 7, 2024 Welcome & Introductions Alan J.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

ACNB CORPORATION REPORTS 2024 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2024 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 25, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net income of $

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 25, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND GETTYSBURG, PA, April 24, 2024 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 April 3, 2024

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 April 3, 2024 U.

ARS

2 0 23 ANNUAL REVIEWTo be the independent financial services provider of choice in the communities served by building relationships and finding solutions .

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the Appropriate Box: ☐ Preliminary Proxy

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 March 25, 2024

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 March 25, 2024 U.

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 March 22, 2024

ACNB Corporation 16 Lincoln Square Gettysburg, Pennsylvania 17325 March 22, 2024 U.

LETTER

United States securities and exchange commission logo March 21, 2024 James P. Helt President and CEO ACNB Corporation 16 Lincoln Square Gettysburg, PA 17325 Re: ACNB Corporation Registration Statement on Form S-3 Filed March 14, 2024 File No. 333-277926 Dear James P. Helt: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 15, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporatio

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS RESTRICTED STOCK AGREEMENT (“Agreement”), dated effective March 15, 2024 (“Grant Date”), by and among ACNB Bank (“Bank”), ACNB Corporation (“Corporation”), and (“Participant”), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 15, 2024 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 15, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS RESTRICTED STOCK AGREEMENT (“Agreement”), dated effective March 15, 2024 (“Grant Date”), by and among ACNB Bank (“Bank”), ACNB Corporation (“Corporation”), and (“Participant”), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Tables FORM S-3 Registration Statement Under the Securities Act of 1933 (Form Type) ACNB Corporation (Exact Name of Registrant as Specified in its Charter) Table 1- Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit (1) Maximum Aggregate Offering Price(1)(2) Fee R

Subsidiaries of the Registrant.

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT The Registrant has the following subsidiaries: ACNB Bank, a Pennsylvania state-chartered commercial bank and trust company and ACNB Insurance Services, Inc., incorporated in the State of Maryland.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year-ended December 31, 2023 OR ☐ TRANSACTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of incorporation or organization) (I.

Form of Senior Indenture

Exhibit 4.4 ACNB CORPORATION Issuer and [ ] Trustee SENIOR INDENTURE Dated as of [ ], 20[ ] Senior Debt Securities TABLE OF CONTENTS ARTICLE ONE - DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION 1 Section 1.01 Definitions 1 Section 1.02 Compliance Certificates and Opinions 8 Section 1.03 Form of Documents Delivered to Trustee 9 Section 1.04 Acts of Holders 9 Section 1.05 Notices, Etc., to

Form of Subordinated Indenture

Exhibit 4.5 ACNB CORPORATION Issuer and [ ] Trustee SUBORDINATED INDENTURE Dated as of [ ], 20[ ] Subordinated Debt Securities TABLE OF CONTENTS ARTICLE ONE - DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION 1 Section 1.01 Definitions 1 Section 1.02 Compliance Certificates and Opinions 9 Section 1.03 Form of Documents Delivered to Trustee 9 Section 1.04 Acts of Holders 10 Section 1.05 Notic

First Amendment to ACNB Bank Salary Continuation Agreement by and between ACNB Bank and Laurie A. Laub dated as of October 6, 2022. (Incorporated by reference to Exhibit 10.32 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Commission on March 14, 2024.)

Exhibit 10.32 FIRST AMENDMENT TO ACNB BANK SALARY CONTINUATION AGREEMENT THIS FIRST AMENDMENT (the “Amendment”) is adopted, made and agreed to this 6th day of October 2022, by and between ACNB Bank (the “Bank”) and Laurie A. Laub (the “Executive”). WHEREAS, the Bank and the Executive are parties to a Salary Continuation Agreement dated November 20, 2018 (the “Agreement”) which provides deferred co

Salary Continuation Agreement by and between ACNB Bank and Laurie A. Laub dated as of October 6, 2022. (Incorporated by reference to Exhibit 10.33 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Commission on March 14, 2024.)

Exhibit 10.33 ACNB BANK SALARY CONTINUATION AGREEMENT THIS AGREEMENT is made this 6th day of October, 2022 by and between ACNB BANK, located in Gettysburg, Pennsylvania, and Laurie A. Laub (“Executive”). INTRODUCTION To encourage the Executive to remain an employee of the Bank the Bank entered into a Salary Continuation Agreement with Executive on November 20, 2018. In an effort to provide benefit

Excess Incentive Compensation Recovery Policy Statement

Exhibit 97 ACNB CORPORATION & SUBSIDIARIES EXCESS INCENTIVE COMPENSATION RECOVERY POLICY STATEMENT The Board of Directors (the “Board”) of ACNB Corporation (the “Company”) believes that it is in the best interests of the Company and its shareholders to adopt this Excess Incentive Compensation Recovery Policy Statement (the “Policy”).

As filed with the Securities and Exchange Commission on March 14, 2024

As filed with the Securities and Exchange Commission on March 14, 2024 Registration No.

Amended and Restated Employment Agreement between ACNB Bank and Laurie A. Laub dated as of October 6, 2022. (Incorporated by reference to Exhibit 10.31 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Commission on March 14, 2024.)

Exhibit 10.31 AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS AGREEMENT is made effective as of the 6th day of October, 2022, between ACNB BANK (“Bank”), a Pennsylvania state-chartered bank having a place of business at 16 Lincoln Square, Gettysburg, Pennsylvania, 17325, and Laurie A. Laub (“Executive”), an individual residing in Pennsylvania. WITNESSETH: WHEREAS, the Bank is a subsidiary of ACNB C

AMENDED AND RESTATED ACNB CORPORATION February 20, 2024

Exhibit 99.1 AMENDED AND RESTATED BYLAWS OF ACNB CORPORATION February 20, 2024 These Bylaws are supplemental to the Pennsylvania Business Corporation Law and other applicable provisions of law, as the same shall from time to time be in effect. ARTICLE I MEETINGS OF SHAREHOLDERS Section 101. Place Of Meetings. All meetings of the shareholders shall be held at such place or places, within or without

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 20, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

ACNB / ACNB Corporation / FMR LLC Passive Investment

SCHEDULE 13G Amendment No.2 ACNB CORP COMMON STOCK Cusip #000868109 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) Cusip #000868109 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 544,371 Item 6: 0 Item 7: 544,408 Item 8: 0 Item 9: 544,408 Item 11: 6.398% Item 12: HC

ACNB / ACNB Corporation / BlackRock Inc. Passive Investment

SC 13G/A 1 us0008681092012924.txt us0008681092012924.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) ACNB CORP - (Name of Issuer) Common Stock - (Title of Class of Securities) 000868109 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desig

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 25, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION REPORTS FOURTH QUARTER AND 2023 FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS FOURTH QUARTER AND 2023 FINANCIAL RESULTS GETTYSBURG, PA, January 25, 2024 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net inco

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 23, 2024 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND GETTYSBURG, PA, January 24, 2024 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Director

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 15, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

ACNB BANK 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN EFFECTIVE NOVEMBER 1, 2023

Exhibit 99.3 ACNB BANK 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN EFFECTIVE NOVEMBER 1, 2023 Pursuant to due authorization by its Board of Directors, the undersigned, ACNB BANK (the "Bank"), located in Gettysburg, PA, adopted the following 2023 EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN (the "Plan") as of the 1st day of November, 2023. The purpose of this Plan is to attract, retain and reward

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

FIRST AMENDMENT TO THE ACNB BANK AMENDED AND RESTATED EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN

Exhibit 99.2 FIRST AMENDMENT TO THE ACNB BANK AMENDED AND RESTATED EXECUTIVE SUPPLEMENTAL LIFE INSURANCE PLAN Insured/Participant Name: This First Amendment to the Amended and Restated Executive Supplemental Life Insurance Plan is hereby made effective as of the 1st day of November, 2023, by ACNB Bank. WHEREAS, ACNB Bank previously implemented the Amended and Restated Executive Supplemental Life I

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 27, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION REPORTS 2023 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2023 THIRD QUARTER FINANCIAL RESULTS GETTYSBURG, PA, October 27, 2023 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced financial res

ACNB CORPORATION INCREASES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION INCREASES QUARTERLY CASH DIVIDEND GETTYSBURG, PA, October 19, 2023 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors ap

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 17, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 13, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission F

ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA GETTYSBURG, PA, September 13, 2023 - ACNB Corporation was recently recognized, with a ranking of #45, by the Central Penn Business Journal on its an

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

ACNB CORPORATION REPORTS 2023 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2023 SECOND QUARTER FINANCIAL RESULTS GETTYSBURG, PA, July 27, 2023 - ACNB Corporation (NASDAQ: ACNB) (“ACNB” or the “Corporation”), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced financial resul

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 25, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND GETTYSBURG, PA, July 26, 2023 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors a

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

A C N B C O R P O R A T I O N Investor Presentation First Quarter of 2023 Nasdaq: ACNB investor.acnb.com 2 | Investor Presentation Important Information • ACNB Corporation (Nasdaq: ACNB) (“ACNB” or the “Corporation”) is the financial holding company

acnbirdeck3-31x23xfinal A C N B C O R P O R A T I O N Investor Presentation First Quarter of 2023 Nasdaq: ACNB investor.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2023 ACNB Corporation (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Num

ACNB Corporation Annual Meeting of Shareholders May 2, 2023 1

Exhibit 99.1 ACNB Corporation Annual Meeting of Shareholders May 2, 2023 1 Welcome & Introductions Alan J. Stock Chairman of the Board 2 Board of Directors Alan J. Stock Chairman of the Board Todd L. Herring Vice Chairman of the Board Kimberly S. Chaney Frank Elsner, III James P. Helt Scott L. Kelley James J. Lott Donna M. Newell Daniel W. Potts D. Arthur Seibel, Jr. 3 James P. Helt, President & C

ACNB CORPORATION REPORTS 2023 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2023 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 27, 2023 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced financial results for the three months ended

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2023 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 18, 2023 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 18, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Kevin J. Hayes SVP/General Counsel, Secretary & Chief Governance Officer 717.339.5161 [email protected] ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND GETTYSBURG, PA, April 20, 2023 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.      ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the Appropriate Box: ☐ Preliminary Pr

ARS

202 2 ANNUAL REVIEWONE VISIONTo be the independent financial services provider of choice in the core markets served by building relationships and finding solutions.

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS RESTRICTED STOCK AGREEMENT (“Agreement”), dated as of March 15, 2023 (“Grant Date”), by and among ACNB Bank (“Bank”), ACNB Corporation (“Corporation”), and (“Participant”), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB Corp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 15, 2023 ACNB Corporation (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 15, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

Subsidiaries of the Registrant.

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT The Registrant has the following subsidiaries: ACNB Bank, a Pennsylvania state-chartered commercial bank and trust company and ACNB Insurance Services, Inc., incorporated in the State of Maryland.

Supplemental Executive Retirement Plan by and between ACNB Bank and Douglas A. Seibel dated as of October 20, 2022. (Incorporated by reference to Exhibit 10.33 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the Commission on March 3, 2023.)

Exhibit 10.33 ACNB BANK SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN This Supplemental Executive Retirement Plan (the “Plan”) is adopted October 20, 2022, by and between ACNB Bank (the “Bank”), a Pennsylvania banking corporation, and Douglas A. Seibel (the “Executive”). RECITALS: A.The Bank is a wholly-owned subsidiary of ACNB Corporation. B.The Executive is employed by the Bank. C.The Bank recognizes t

Amended and Restated Employment Agreement between ACNB Bank and Douglas A. Seibel dated as of October 20, 2022. (Incorporated by reference to Exhibit 10.31 of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the Commission on March 3, 2023.)

Exhibit 10.31 AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS AGREEMENT is made effective as of the 20th day of October, 2022, between ACNB BANK (“Bank”), a Pennsylvania state-chartered bank having a place of business at 16 Lincoln Square, Gettysburg, Pennsylvania, 17325, and Douglas A. Seibel (“Executive”), an individual residing in Pennsylvania. WITNESSETH: WHEREAS, the Bank is a subsidiary of AC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year-ended December 31, 2022 OR ☐ TRANSACTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of incorporation or organization) (I.

ACNB / ACNB Corporation / FMR LLC Passive Investment

SC 13G/A 1 filing.txt SCHEDULE 13G Amendment No.1 ACNB CORP COMMON STOCK Cusip #000868109 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) Cusip #000868109 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 431,731 Item 6: 0 Item 7: 431,983 Item 8: 0 Item 9: 431,983 Item

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 3, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB / ACNB Corporation / BlackRock Inc. Passive Investment

SC 13G 1 us0008681092020323.txt us0008681092020323.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) ACNB CORP - (Name of Issuer) Common Stock - (Title of Class of Securities) 000868109 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 24, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION ANNOUNCES FIRST QUARTER CASH DIVIDEND GETTYSBURG, PA, January 30, 2023 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors approved and de

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 26, 2023 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION REPORTS 2022 RECORD FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2022 RECORD FINANCIAL RESULTS Year-End 2022 Highlights •Record net income for the year ended December 31, 2022 totaled $35,752,000, an increase of $7,918,000, or 28.45%, from comparable period results in 2021. Basic earnings per shar

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 20, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

ACNB CORPORATION ANNOUNCES REBRANDING OF MARYLAND BANKING DIVISIONS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION ANNOUNCES REBRANDING OF MARYLAND BANKING DIVISIONS GETTYSBURG, PA, December 19, 2022 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc. headquartered in Gettysburg, PA, announced pla

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 19, 2022 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 19, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 23, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

Amended and Restated Bylaws of ACNB Corporation. (Incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K, filed with the Commission on November 21, 2022.)

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF ACNB CORPORATION November 15, 2022 These Bylaws are supplemental to the Pennsylvania Business Corporation Law and other applicable provisions of law, as the same shall from time to time be in effect. ARTICLE I MEETINGS OF SHAREHOLDERS Section 101. Place Of Meetings. All meetings of the shareholders shall be held at such place or places, within or without

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 15, 2022 ACNB Corporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 15, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fi

ACNB CORPORATION DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN 300,000 Shares of Common Stock Par Value $2.50

Filed Pursuant to Rule 424(b)(3) Registration No. 333-171840 Prospectus Supplement No. 1 Dated November 18, 2022 (To Prospectus dated March 8, 2019) ACNB CORPORATION DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN 300,000 Shares of Common Stock Par Value $2.50 We are providing you with this Prospectus Supplement No. 1, dated November 18, 2022, to update the Prospectus dated March 8, 2019 (the ?Prosp

ACNB Bank Salary Savings Plan. (Incorporated by reference to Exhibit 10.4 of the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2022, filed with the Commission on November 4, 2022.)

acnbbanksalarysavingspla Exhibit 10.4

Group Pension Plan for Employees of ACNB Bank. (Incorporated by reference to Exhibit 10.5 of the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2022, filed with the Commission on November 4, 2022.)

grouppensionplanforemplo GROUP PENSION PLAN FOR EMPLOYEES OF ACNB BANK Summary Plan Description (08/2015) Exhibit 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

ACNB CORPORATION REPORTS 2022 THIRD QUARTER AND YEAR-TO-DATE FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 [email protected] ACNB CORPORATION REPORTS 2022 THIRD QUARTER AND YEAR-TO-DATE FINANCIAL RESULTS 2022 Third Quarter and Year-To-Date Highlights •Net income for the three months ended September 30, 2022 totaled $10,324,000, an increase of $2,964,000, or 40.27%, from comparable

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 27, 2022 ACNB Corporation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 27, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 18, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission Fil

ACNB CORPORATION INCREASES QUARTERLY CASH DIVIDEND AND ANNOUNCES COMMON STOCK REPURCHASE PROGRAM

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION INCREASES QUARTERLY CASH DIVIDEND AND ANNOUNCES COMMON STOCK REPURCHASE PROGRAM GETTYSBURG, PA, October 24, 2022 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today t

ACNB BANK SALARY CONTINUATION AGREEMENT

Exhibit 99.3 Execution Version ACNB BANK SALARY CONTINUATION AGREEMENT THIS AGREEMENT is made this 5 day of October, 2022 by and between ACNB BANK, located in Gettysburg, Pennsylvania, and James P. Helt (?Executive?). INTRODUCTION To encourage the Executive to remain an employee of the Bank, the Bank entered into Salary Continuation Agreements with Executive on March 28, 2012, and November 27, 201

FIRST AMENDMENT TO ACNB BANK SALARY CONTINUATION AGREEMENT

Exhibit 99.7 Execution Version FIRST AMENDMENT TO ACNB BANK SALARY CONTINUATION AGREEMENT THIS FIRST AMENDMENT (the ?Amendment?) is adopted, made and agreed to this 5 day of October 2022, by and between ACNB Bank (the ?Bank?) and Jason H. Weber (the ?Executive?). WHEREAS, the Bank and the Executive are parties to a Salary Continuation Agreement dated January 31, 2022 (the ?Agreement?) which provid

ACNB BANK SALARY CONTINUATION AGREEMENT

Exhibit 99.4 Execution Version ACNB BANK SALARY CONTINUATION AGREEMENT THIS AGREEMENT is made this 5 day of October, 2022 by and between ACNB BANK, located in Gettysburg, Pennsylvania, and Jason H. Weber (?Executive?). INTRODUCTION To encourage the Executive to remain an employee of the Bank the Bank entered into a Salary Continuation Agreement with Executive on January 31, 2022. In an effort to p

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 5, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB BANK SALARY CONTINUATION AGREEMENT

Exhibit 99.8 ACNB BANK SALARY CONTINUATION AGREEMENT THIS AGREEMENT is made this 31st day of January, 2022 by and between ACNB BANK, located in Gettysburg, Pennsylvania, and JASON H. WEBER (?Executive?). INTRODUCTION To encourage the Executive to remain an employee of the Bank and to provide benefits in excess of the limitations imposed on qualified plans, the Bank is willing to provide additional

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

Exhibit 99.2 Execution Version AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS AGREEMENT is made effective as of the 5 day of October, 2022, by and among ACNB CORPORATION (?Corporation?), a Pennsylvania business corporation having a principle place of business at 16 Lincoln Square, Gettysburg, Pennsylvania 17325, ACNB BANK (?Bank?), a Pennsylvania state-chartered bank having a place of business at

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

Exhibit 99.1 Execution Version AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS AGREEMENT (?Agreement?) is made as of the 5 day of October, 2022, by and among ACNB Corporation (?Corporation?), a Pennsylvania business corporation having a principle place of business at 16 Lincoln Square, Gettysburg, Pennsylvania, 17325, ACNB Bank (?Bank?), a Pennsylvania state-chartered bank having a principle place

FIRST AMENDMENT TO ACNB BANK SALARY CONTINUATION AGREEMENT

Exhibit 99.5 Execution Version FIRST AMENDMENT TO ACNB BANK SALARY CONTINUATION AGREEMENT THIS FIRST AMENDMENT (the ?Amendment?) is adopted, made and agreed to this 5 day of October 2022, by and between ACNB Bank (the ?Bank?) and James P. Helt (the ?Executive?). WHEREAS, the Bank and the Executive are parties to a Salary Continuation Agreement dated November 27, 2018 (the ?Agreement?) which provid

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 14, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorpor

ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA GETTYSBURG, PA, September 14, 2022 - ACNB Corporation was recognized, with a ranking of #26, by the Central Penn Business Journal on its annual list of the Fastest G

ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION RECOGNIZED AS ONE OF THE FASTEST GROWING COMPANIES IN CENTRAL PENNSYLVANIA GETTYSBURG, PA, September 14, 2022 - ACNB Corporation was recognized, with a ranking of #26, by the Central Penn Business Journal on its annual list of the Fastest G

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 14, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

ACNB CORPORATION REPORTS 2022 SECOND QUARTER AND YEAR-TO-DATE FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION REPORTS 2022 SECOND QUARTER AND YEAR-TO-DATE FINANCIAL RESULTS 2022 Second Quarter and Year-To-Date Highlights ?Net income for the three months and quarter ended June 30, 2022, totaled $8,630,000, which was an increase of $122,000 or 1.43%

ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION ANNOUNCES THIRD QUARTER CASH DIVIDEND GETTYSBURG, PA, July 21, 2022 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors approved and decla

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File N

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 1, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

JASON H. WEBER NOW ACNB CORPORATION CHIEF FINANCIAL OFFICER

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] JASON H. WEBER NOW ACNB CORPORATION CHIEF FINANCIAL OFFICER GETTYSBURG, PA, June 7, 2022 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announces that Jason H. Weber is now Executive Vice Presid

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 2, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

Letter regarding Change in Certifying Accountant – Letter from RSM US LLP to the Securities and Exchange Commission dated May 24, 2022.

Exhibit 16.1 RSM US LLP 30 S 17th St Suite 710 Philadelphia, PA 19103 May 24, 2022 O +1 215 765 4600 F +1 215 765 5800 Securities and Exchange Commission www.rsmus.com Washington, D.C. 20549 Commissioners: We have read ACNB Corporation?s statements included under Item 4.01(a) of its Form 8-K filed on May 24, 2022 and we agree with such statements concerning our firm. /s/ RSM US LLP

Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 20, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Nu

ACNB CORPORATION HOLDS 2022 ANNUAL MEETING OF SHAREHOLDERS

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION HOLDS 2022 ANNUAL MEETING OF SHAREHOLDERS GETTYSBURG, PA, May 5, 2022 - The 2022 Annual Meeting of Shareholders of ACNB Corporation (NASDAQ: ACNB) was held on Tuesday, May 3, in a virtual meeting format. ACNB Corporation is the financial ho

ACNB Corporation 2022 Annual Meeting Presentation Slides.

Exhibit 99.1 ACNB Corporation Annual Meeting of Shareholders May 3, 2022 1 Welcome & Introductions 2 Board of Directors Alan J. Stock Chairman of the Board Todd L. Herring Vice Chairman of the Board Kimberly S. Chaney Frank Elsner, III James P. Helt Scott L. Kelley James J. Lott Donna M. Newell Daniel W. Potts D. Arthur Seibel, Jr. David L. Sites 3 Retiring Directors Marian B. Schultz ? Ms. Schult

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File Num

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-35015 ACNB CORPORATION (Exact name of Registrant as specified in its charter) Pennsylvania 23-2233457 (State or other jurisdiction of (I.

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

ACNB CORPORATION REPORTS 2022 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION REPORTS 2022 FIRST QUARTER FINANCIAL RESULTS 2022 First Quarter Highlights ? Net income for the three months and quarter ended March 31, 2022, totaled $6,599,000, which was a decrease of $872,000 or 11.7% from comparable period results for

ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Lynda L. Glass EVP/Secretary & Chief Governance Officer 717.339.5085 [email protected] ACNB CORPORATION ANNOUNCES SECOND QUARTER CASH DIVIDEND GETTYSBURG, PA, April 25, 2022 - ACNB Corporation (NASDAQ: ACNB), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced today that the Board of Directors approved and dec

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 19, 2022 ACNB Corporation (Exact name of Registrant as specified in its charter) Pennsylvania 1-35015 23-2233457 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DEF 14A 1 tm223400-1def14a.htm DEF 14A TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.       ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Che

ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT

Exhibit 99.3 ACNB BANK VARIABLE COMPENSATION PLAN RESTRICTED STOCK AGREEMENT THIS AGREEMENT, dated as of March 15, 2022 (?Grant Date?), by and among ACNB Bank (?Bank?), ACNB Corporation (?Corporation?), and (?Participant?), is entered into as follows: WHEREAS, the Bank is a wholly-owned subsidiary of the Corporation; WHEREAS, the Corporation established the ACNB Corporation 2018 Omnibus Stock Ince