What are Donald Arthur Seibel Jr’s ACNB (ACNB) direct share holdings after this transaction?

Following the reported award and related dividend reinvestment, his direct ownership is 6,812.4081 ACNB Corporation Common shares. This figure reflects both the stock compensation grant and shares acquired automatically through the company’s Dividend Reinvestment and Stock Purchase Plan.

[Form 4] ACNB CORP Insider Trading Activity

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Seibel Donald Arthur Jr reported acquisition or exercise transactions in this Form 4 filing.

ACNB CORP director Donald Arthur Seibel Jr reported a routine change in his holdings. He received 243.3198 shares of ACNB Corporation Common as stock compensation for board service, valued at $56.5100 per share, under a director compensation plan.

The direct holding figure also includes shares purchased the same day through automatic dividend reinvestment under ACNB Corporation’s Dividend Reinvestment and Stock Purchase Plan. After these entries, he directly owns 6,812.4081 shares and indirectly holds 12,919.6240 shares through a trust. The filing shows no open‑market buys or sells.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Seibel Donald Arthur Jr

Role null

Type	Security	Shares	Price	Value
Grant/Award	ACNB Corporation Common	243.32	$56.51	$14K
holding	ACNB Corporation Common	--	--	--

Holdings After Transaction: ACNB Corporation Common — 6,812.408 shares (Direct, null); ACNB Corporation Common — 12,919.624 shares (Indirect, Trust)

Footnotes (1)

The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4). The shares represent stock received as compensation for service as a director pursuant to a director compensation plan. 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.

Key Figures

Stock compensation grant: 243.3198 shares Grant price: $56.5100 per share Direct holdings after transaction: 6,812.4081 shares +1 more

4 metrics

Stock compensation grant 243.3198 shares ACNB Corporation Common, director compensation award

Grant price $56.5100 per share Value of stock received as director compensation

Direct holdings after transaction 6,812.4081 shares ACNB Corporation Common, directly owned after grant and reinvestment

Indirect trust holdings 12,919.6240 shares ACNB Corporation Common, held indirectly through a trust

Key Terms

director compensation plan, Dividend Reinvestment and Stock Purchase Plan, automatic reinvestment of dividends, Section 16 of the Securities Exchange Act of 1934

4 terms

director compensation plan financial

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

Dividend Reinvestment and Stock Purchase Plan financial

"automatic reinvestment of dividends under the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan"

A dividend reinvestment and stock purchase plan lets investors automatically use cash dividends to buy additional shares and often make extra share purchases directly from the company, usually at low or no commission. Think of it as an automatic savings plan for stock: dividends and optional contributions are turned into more shares, helping ownership grow through compounding and making regular investing simple and low-cost—key for long-term investors.

automatic reinvestment of dividends financial

"shares of common stock purchased for the same transaction date through the automatic reinvestment of dividends"

Section 16 of the Securities Exchange Act of 1934 regulatory

"which are exempt from the reporting requirements of Section 16 of the Securities Exchange Act of 1934"

A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.

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Form 4 Insider Transactions: What Each Field Means →

06/17/2026 - 03:41 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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

PENNSYLVANIA

17325

(City)

(State)

(Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
ACNB Corporation Common	06/15/2026	06/16/2026⁽¹⁾	A		243.3198⁽²⁾	A	$56.51	6,812.4081⁽³⁾	D
ACNB Corporation Common								12,919.624⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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.	06/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did ACNB (ACNB) director Donald Arthur Seibel Jr report in this Form 4?

ACNB director Donald Arthur Seibel Jr reported receiving 243.3198 shares of common stock as compensation, valued at $56.5100 per share. The filing updates his direct and indirect holdings without showing any open-market purchases or sales of ACNB shares.

How many ACNB (ACNB) shares did the director receive as compensation?

He received 243.3198 ACNB Corporation Common shares as stock compensation for service as a director. The award was granted under a director compensation plan and priced at $56.5100 per share according to the Form 4 insider trading report.

Does the ACNB (ACNB) Form 4 show any indirect holdings for the director?

Yes. The Form 4 discloses that he indirectly holds 12,919.6240 ACNB Corporation Common shares through a trust. This entry is categorized as indirect ownership and reflects a separate position from his directly held shares reported in the same filing.

Were any ACNB (ACNB) shares bought or sold on the open market in this Form 4?

No open-market purchases or sales are shown. The main transaction is a grant of 243.3198 shares as director compensation, and additional shares arose from automatic dividend reinvestment, which is exempt from normal Section 16 reporting requirements under the Exchange Act.

What role does the dividend reinvestment plan play in this ACNB (ACNB) filing?

The Form 4 notes that his reported direct holdings include shares bought via automatic dividend reinvestment under ACNB’s Dividend Reinvestment and Stock Purchase Plan. These reinvested shares are exempt from Section 16 reporting, but their impact is reflected in the updated direct share total.