ACNB director buys stock at $65.29 per share

ACNB director Frank Elsner III received stock as director compensation and added shares via dividend reinvestment and purchase on September 15, 2026.

Rhea-AI Filing Summary

ACNB CORP (ACNB) reported that director Frank Elsner III acquired ACNB Corporation Common shares on September 15, 2026. The transactions included a grant of 157.7577 shares received as compensation for board service under a director compensation plan and a purchase of 3.8291 shares at $65.29 per share, which reflects shares bought for the same date through the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan. The execution date was determined under SEC Rule 16a-3(g)(2) and (g)(4), and no Rule 10b5-1 trading plan is indicated.

Insider Trade Summary

Net Buyer: 3.8291 shares

Net Buy 2 txns

Insider ELSNER FRANK III

Role Director

Bought 3.8291 shs ($250.00)

Type	Security	Shares	Price	Value
Grant/Award	ACNB Corporation Common F1, F2, F3	157.7577	$65.29	$10K
Purchase	ACNB Corporation Common F1, F3	3.8291	$65.29	$250.00

Holdings After Transaction: ACNB Corporation Common — 29,071.0964 shares (Direct)

Footnotes (3)

1. F1. The date of execution was determined in accordance with SEC Rule 16a-3(g)(2) and (g)(4).
2. F2. The shares represent stock received as compensation for service as a director pursuant to a director compensation plan.
3. F3. 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

Director stock grant: 157.7577 shares Shares purchased including dividend reinvestment: 3.8291 shares Per-share transaction price: $65.29 per share +2 more

5 metrics

Director stock grant 157.7577 shares Shares received as compensation for service as a director on September 15, 2026

Shares purchased including dividend reinvestment 3.8291 shares Common shares acquired for the September 15, 2026 transaction date

Per-share transaction price $65.29 per share Price applied to both the grant valuation and purchased shares on September 15, 2026

Net buy/sell shares 3.8291 shares Net shares bought versus sold across reported transactions

Transaction date September 15, 2026 Date of both the director compensation grant and purchase transactions

Key Terms

Rule 16a-3(g)(2), director compensation plan, Dividend Reinvestment and Stock Purchase Plan, Section 16 of the Securities Exchange Act of 1934

4 terms

Rule 16a-3(g)(2) regulatory

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

director compensation plan financial

"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.

Section 16 of the Securities Exchange Act of 1934 regulatory

"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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did ACNB director Frank Elsner III report on this Form 4 for ACNB?

He reported two acquisitions of ACNB Corporation Common on September 15, 2026: a grant of 157.7577 shares as director compensation and a purchase of 3.8291 shares, including dividend reinvestment under the company’s plan.

At what price were the ACNB shares acquired in Frank Elsner III’s September 15, 2026 transactions?

Both transactions for ACNB were reported at $65.29 per share, covering the grant-related valuation and the shares purchased, including those acquired through the Dividend Reinvestment and Stock Purchase Plan on that date.

How many ACNB shares did Frank Elsner III receive as director compensation?

He received 157.7577 shares of ACNB Corporation Common as stock compensation for service as a director, pursuant to a director compensation plan, with the execution date determined under SEC Rule 16a-3(g)(2) and (g)(4).

How many ACNB shares did Frank Elsner III buy through purchase and dividend reinvestment?

He acquired 3.8291 shares of ACNB Corporation Common through a purchase for the September 15, 2026 transaction date, which includes shares bought via automatic dividend reinvestment under ACNB’s Dividend Reinvestment and Stock Purchase Plan.

Were Frank Elsner III’s ACNB transactions reported as made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as affirmative, and the footnotes describe director compensation and dividend reinvestment mechanics without stating that the trades were made pursuant to a Rule 10b5-1 plan.

Are the ACNB dividend reinvestment shares subject to Section 16 reporting for this Form 4?

The footnote states that the dividend reinvestment shares are acquired under ACNB’s Dividend Reinvestment and Stock Purchase Plan and are exempt from Section 16 reporting requirements, even though the total acquired for that date is reflected in this Form 4.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/17/2026 - 09:53 AM Accepted by SEC EDGAR 09/17/2026 - 09:53 AM Learn about SEC filing dates

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^*

ELSNER FRANK III

(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)
09/15/2026

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)
			Code	V	Amount	(A) or (D)	Price
ACNB Corporation Common	09/15/2026	09/16/2026(1)	A		157.7577(2)	A	$65.29	29,052.1094(3)	D
ACNB Corporation Common	09/15/2026	09/16/2026(1)	P		3.8291	A	$65.29	29,071.0964(3)	D

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 Frank Elsner, III	09/17/2026
	** 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)