Were the ACNB (ACNB) share sales made under a Rule 10b5-1 trading plan?

The transaction was not marked as being made under a Rule 10b5-1 trading plan . The document-level Rule 10b5-1 checkbox is shown as false, indicating the box for plan-based trading was explicitly unchecked for this filing.

ACNB CORP (ACNB) director sells 1,500 shares at $64.35

Q: What insider transaction did ACNB (ACNB) director Donald Arthur Seibel Jr report?

Donald Arthur Seibel Jr reported a sale of 1,500 shares of ACNB Corporation Common on August 7, 2026 at $64.35 per share in an open-market or private transaction, as shown in the Form 4 data.

Q: At what price did the ACNB (ACNB) director sell his 1,500 shares?

The 1,500 ACNB Corporation Common shares were sold at $64.35 per share . This per-share price is reported as a straightforward transaction price, indicating a standard open-market or private sale on August 7, 2026 .

Q: How many ACNB (ACNB) shares does the director hold after this reported sale?

After the reported sale, the director holds 5,312.4081 shares directly and an additional 12,919.624 shares indirectly through a trust . These post-transaction holdings are listed separately for direct and indirect ownership in the filing data.

Q: What type of ownership accounts for the indirect ACNB (ACNB) shares reported?

The indirect holdings of 12,919.624 shares are reported with a nature of ownership described as "Trust" . This indicates the shares are held through a trust, classified as indirect ownership rather than being held directly by the reporting person.

Q: How many total ACNB (ACNB) shares did the director sell in this Form 4?

The Form 4 data shows a single sale of 1,500 shares of ACNB Corporation Common. No additional buy, gift, or derivative exercise transactions are reported, and the net buy/sell direction in the summary is listed as net-sell for 1,500 shares.

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

ACNB CORP director Donald Arthur Seibel Jr reported selling 1,500 shares of ACNB Corporation Common on August 7, 2026 at $64.35 per share in an open-market or private transaction. After this sale, he directly holds 5,312.4081 shares and indirectly holds 12,919.624 shares through a trust. The trade was not marked as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 1,500 shares

Net Sell 2 txns

Insider Seibel Donald Arthur Jr

Role Director

Sold 1,500 shs ($97K)

Type	Security	Shares	Price	Value
Sale	ACNB Corporation Common	1,500	$64.35	$97K
holding	ACNB Corporation Common	--	--	--

Holdings After Transaction: ACNB Corporation Common — 5,312.4081 shares (Direct); ACNB Corporation Common — 12,919.624 shares (Indirect, Trust)

Key Figures

Shares sold: 1,500 shares Sale price per share: $64.35 Direct holdings after sale: 5,312.4081 shares +2 more

5 metrics

Shares sold 1,500 shares Sale of ACNB Corporation Common on 2026-08-07

Sale price per share $64.35 Per-share price for 1,500-share sale on 2026-08-07

Direct holdings after sale 5,312.4081 shares Direct ACNB Corporation Common shares following the reported transaction

Indirect holdings via trust 12,919.624 shares Indirect ACNB Corporation Common shares held through a trust after the transaction

Reported net buy/sell shares -1,500 shares Net share change across reported non-derivative transactions

Key Terms

Rule 10b5-1, indirect, Trust

3 terms

Rule 10b5-1 financial

"document-level Rule 10b5-1 checkbox: true = transactions affirmed under a trading plan"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

indirect financial

""ownership_type": "indirect", "ownership_code": "I""

Trust financial

""nature_of_ownership": "Trust""

A trust is a legal setup in which one party (the trustee) holds and manages assets—like cash, stocks or property—on behalf of other people (beneficiaries) according to instructions from the person who created it (the grantor). Think of it as a locked box with a keyholder who must follow written rules; for investors it matters because trusts influence who controls and benefits from assets, affect taxes and succession, and can change how quickly or transparently shares are bought, sold or voted.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/07/2026 - 03:47 PM Accepted by SEC EDGAR 08/07/2026 - 03:47 PM

FAQ

What insider transaction did ACNB (ACNB) director Donald Arthur Seibel Jr report?

Donald Arthur Seibel Jr reported a sale of 1,500 shares of ACNB Corporation Common on August 7, 2026 at $64.35 per share in an open-market or private transaction, as shown in the Form 4 data.

At what price did the ACNB (ACNB) director sell his 1,500 shares?

The 1,500 ACNB Corporation Common shares were sold at $64.35 per share. This per-share price is reported as a straightforward transaction price, indicating a standard open-market or private sale on August 7, 2026.

How many ACNB (ACNB) shares does the director hold after this reported sale?

After the reported sale, the director holds 5,312.4081 shares directly and an additional 12,919.624 shares indirectly through a trust. These post-transaction holdings are listed separately for direct and indirect ownership in the filing data.

What type of ownership accounts for the indirect ACNB (ACNB) shares reported?

The indirect holdings of 12,919.624 shares are reported with a nature of ownership described as "Trust". This indicates the shares are held through a trust, classified as indirect ownership rather than being held directly by the reporting person.

How many total ACNB (ACNB) shares did the director sell in this Form 4?

The Form 4 data shows a single sale of 1,500 shares of ACNB Corporation Common. No additional buy, gift, or derivative exercise transactions are reported, and the net buy/sell direction in the summary is listed as net-sell for 1,500 shares.

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)
08/07/2026

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	08/07/2026	08/07/2026	S		1,500	D	$64.35	5,312.4081	D
ACNB Corporation Common								12,919.624	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:

Remarks:

	/s/ Kevin J. Hayes as POA for Donald Arthur Seibel, Jr.	08/07/2026
	** 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