[Form 4] ACNB CORP Insider Trading Activity

Rhea-AI Filing Summary

ACNB Corporation director Donald Arthur Seibel Jr. received 175.6636 shares of ACNB common stock as director compensation for the transaction dated 09/15/2025 (deemed execution 09/16/2025) at a reported price of $44.83 per share. After the reported transaction, Mr. Seibel’s direct beneficial ownership is 10,927.2572 shares and his indirect beneficial ownership through a trust is 12,519.0708 shares. The filing notes the shares were issued under a director compensation plan and that additional shares were acquired via automatic dividend reinvestment under ACNB’s Dividend Reinvestment and Stock Purchase Plan, which are exempt from Section 16 reporting. The Form 4 was signed by a power of attorney on 09/17/2025.

Positive

• Director compensation in equity (175.6636 shares) aligns management interests with shareholders
• Explicit breakdown of holdings showing direct (10,927.2572 shares) and indirect (12,519.0708 shares) ownership
• Disclosure that dividend reinvestment shares were purchased under the ACNB Dividend Reinvestment and Stock Purchase Plan and are exempt from Section 16 reporting

Negative

• None.

Insights

Corporate Governance Expert

Routine director compensation; aligns management with shareholders without signaling material change.

The Form 4 discloses a standard issuance of 175.6636 shares to a director as compensation and shows both direct and indirect holdings. This is a common governance practice to align director incentives with shareholder interests. The filing explicitly states the issuance stemmed from the company’s director compensation plan and that some shares were acquired via dividend reinvestment, which is exempt from Section 16 reporting. There is no indication of unusual timing, related-party transactions beyond routine trust holdings, or material change to control. Impact to share count is immaterial given the single small allotment disclosed.

Securities Analyst

No material market-moving information; disclosure documents a small, routine equity grant and dividend reinvestment.

The reported transaction shows a grant of 175.6636 shares at $44.83 under a director compensation plan, recorded with a 09/16/2025 execution date. Post-transaction beneficial ownership totals are provided for direct and indirect positions. The filing clarifies that automatic dividend reinvestment purchases are exempt from Section 16 reporting, which explains part of the indirect holdings. From an investor perspective, this is a standard disclosure that confirms continued director equity ownership but does not provide financial performance metrics or material changes to capitalization.

09/17/2025 - 02:22 PM

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

OMB APPROVAL

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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).

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)
09/15/2025

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	09/15/2025	09/16/2025(1)	A		175.6636(2)	A	$44.83	10,927.2572(3)	D
ACNB Corporation Common								12,519.0708(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.	09/17/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did ACNB director Donald A. Seibel Jr. receive according to the Form 4?

He received 175.6636 shares of ACNB common stock as director compensation, reported for the transaction dated 09/15/2025 (execution 09/16/2025) at a price of $44.83 per share.

What are Donald Seibel Jr.'s beneficial holdings after the reported transaction?

The filing reports 10,927.2572 shares held directly and 12,519.0708 shares held indirectly through a trust following the transaction.

Were the shares received as compensation or purchased?

The shares include stock received as compensation for service as a director under the company’s director compensation plan; additional shares were purchased via automatic dividend reinvestment.

Are any dividend reinvestment shares exempt from Section 16 reporting?

Yes. The filing states that shares purchased through the ACNB Dividend Reinvestment and Stock Purchase Plan are exempt from Section 16 reporting and are included in the reported indirect holdings.

Who signed the Form 4 and when?

The Form 4 was signed by Kevin J. Hayes as power of attorney for Donald Arthur Seibel, Jr. on 09/17/2025.