ACNB Corp (ACNB) director discloses 149.5869-share stock compensation

Rhea-AI Filing Summary

ACNB Corp director Donald Arthur Seibel, Jr. reported acquiring 149.5869 shares of ACNB Corporation common stock on 12/15/2025, recorded at a price of $52.645 per share. The filing lists the transaction with code “A,” and the explanation states the shares were received as compensation for service as a director under a director compensation plan.

After this transaction, Seibel beneficially owns 6,119.1516 shares of ACNB common stock directly and 12,609.4355 shares indirectly through a trust. The reported totals include shares purchased on the same transaction date through automatic dividend reinvestment under ACNB Corporation’s Dividend Reinvestment and Stock Purchase Plan.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Seibel Donald Arthur Jr

(Last) (First) (Middle)

16 LINCOLN SQUARE

(Street)

GETTYSBURG PA 17325

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ACNB CORP [ ACNB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
ACNB Corporation Common	12/15/2025	12/16/2025(1)	A		149.5869(2)	A	$52.645	6,119.1516(3)	D
ACNB Corporation Common								12,609.4355(3)	I	Trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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

2. The shares represent stock received as compensation for service as a director pursuant to a director compensation plan.

3. This amount includes shares of common stock purchased for the same transaction date through the automatic reinvestment of dividends under the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan, which are exempt from the reporting requirements of Section 16 of the Securities Exchange Act of 1934.

Remarks:

	/s/ Kevin J. Hayes as POA for Donald Arthur Seibel, Jr.	12/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What insider transaction did ACNB (ACNB) report for its director?

ACNB Corp reported that director Donald Arthur Seibel, Jr. acquired 149.5869 shares of ACNB Corporation common stock on 12/15/2025, coded as an acquisition ("A").

At what price were the new ACNB (ACNB) shares acquired by the director?

The acquired ACNB Corporation common shares were reported at a price of $52.645 per share.

How many ACNB (ACNB) shares does Donald Arthur Seibel, Jr. own after the reported transaction?

Following the transaction, Seibel beneficially owns 6,119.1516 shares of ACNB common stock directly and 12,609.4355 shares indirectly through a trust.

Was the ACNB (ACNB) share acquisition by the director a purchase or compensation?

The filing states that the 149.5869 shares represent stock received as compensation for service as a director under a director compensation plan.

Does the ACNB (ACNB) director hold shares through a dividend reinvestment plan?

Yes. The explanation notes that the reported share amounts include stock bought the same day through automatic reinvestment of dividends under the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan.

Does the ACNB (ACNB) director hold any shares indirectly?

Yes. In addition to his direct holdings, Seibel is reported to own 12,609.4355 ACNB shares indirectly through a trust.