Brett D. Fulk - 01 Jan 2026 Form 4 Insider Report for ACNB CORP (ACNB)

Role: ACNB Bank EVP
Signature: /s/ Brett D. Fulk
Issuer symbol: ACNB
Transactions as of: 01 Jan 2026
Net transactions value: -$37,278
Form type: 4
Filing time: 05 Jan 2026, 13:36:05 UTC
Previous filing: 17 Dec 2025
Next filing: 27 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
FULK BRETT D	ACNB Bank EVP	16 LINCOLN SQUARE, GETTYSBURG	/s/ Brett D. Fulk	05 Jan 2026	0001224269

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACNB	ACNB Corporation Common	Tax liability	$37,278	-772	-23%	$48.30	2,534	01 Jan 2026	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4).
F2	The shares disposed were withheld by the Issuer and/or its subsidiary ACNB Bank for payment of the tax liability on restricted shares previously awarded on March 15, 2024 and March 14, 2025, under the ACNB Bank Variable Compensation Plan and pursuant to the ACNB Corporation 2018 Omnibus Stock Incentive Plan, that vested on January 1, 2026, in accordance with SEC Rule 16b-3. For clarification, the executive did not sell the shares.

Content

The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4).

The shares disposed were withheld by the Issuer and/or its subsidiary ACNB Bank for payment of the tax liability on restricted shares previously awarded on March 15, 2024 and March 14, 2025, under the ACNB Bank Variable Compensation Plan and pursuant to the ACNB Corporation 2018 Omnibus Stock Incentive Plan, that vested on January 1, 2026, in accordance with SEC Rule 16b-3. For clarification, the executive did not sell the shares.