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BCS

Notice of Proposed Sale · 144

ACNB Corporation

ACNBNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 7, 2026Accepted Aug 7, 2026, 3:17 PM EDTFiling CIK 715579Accession 0001959173-26-005759
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Structured filing — 144

primary_doc.xml

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer
ACNB CORP
Issuer CIK
0000715579
SEC file number
001-35015
Phone
7173343161
Person for whose account securities are to be sold
Seibel Donald Arthur Jr
Relationships to issuer
Director
Street
16 LINCOLN SQUARE
Street (continued)
P O BOX 3129
City
GETTYSBURG
State / country code
PA
Postal code
17325

Securities proposed for sale

Securities proposed for sale · 1 reported row
SecurityProposed unitsAggregate market valueUnits outstandingApproximate sale dateExchangeBroker / market maker
Common1,50097,515.0010,212,04408/06/2026NASDAQFidelity Brokerage Services LLC Common

Broker / market maker — proposed row 1, entry 1

Name
Fidelity Brokerage Services LLC Common
Street
245 Summer Street
City
Boston
State / country code
MA
Postal code
02110

Acquisition of securities to be sold

Acquisition of securities to be sold · 15 reported rows
SecurityAcquiredNature of acquisitionAcquired fromAmount acquiredGift transactionPayment dateNature of payment
Common09/15/2021Stock AwardIssuer127N09/15/2021Compensation
Common06/15/2021Stock AwardIssuer125N06/15/2021Compensation
Common03/15/2021Stock AwardIssuer107N03/15/2021Compensation
Common12/15/2020Stock AwardIssuer124N12/15/2020Compensation
Common09/15/2020Stock AwardIssuer156N09/15/2020Compensation
Common06/15/2020Stock AwardIssuer127N06/15/2020Compensation
Common03/13/2020Stock AwardIssuer137N03/13/2020Compensation
Common12/31/2019Stock AwardIssuer167N12/31/2019Compensation
Common09/13/2019Stock AwardIssuer88N09/13/2019Compensation
Common06/14/2019Stock AwardIssuer89N06/14/2019Compensation
Common06/14/2019Stock AwardIssuer65N06/14/2019Compensation
Common03/15/2019Stock AwardIssuer63N03/15/2019Compensation
Common12/14/2018Stock AwardIssuer64N12/14/2018Compensation
Common09/14/2018Stock AwardIssuer59N09/14/2018Compensation
Common06/15/2018Stock AwardIssuer12N06/15/2018Compensation

Prior-sale reporting

Nothing to report for the preceding three months
Y

Notice signature

Notice date
08/07/2026
Signed
/s/ Ariadna Gonzalez as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Seibel Donald Arthur Jr

Company context

ACNB Corporation, headquartered in Gettysburg, PA, is the $3.26 billion financial holding company for the wholly-owned subsidiaries of ACNB Bank, Gettysburg, PA, and ACNB Insurance Services, Inc., Westminster, MD. Originally founded in 1857, ACNB Bank serves its marketplace with banking and wealth management services, including trust and retail brokerage, via a network of 35 community banking offices and two loan offices located in the Pennsylvania counties of Adams, Cumberland, Franklin, Lancaster and York and the Maryland counties of Baltimore, Carroll and Frederick. ACNB Insurance Services, Inc. is a full-service insurance agency with licenses in 46 states. The agency offers a broad range of property, casualty, health, life and disability insurance serving personal and commercial clients through office locations in Westminster and Jarrettsville, MD, and Gettysburg, PA. For more information regarding ACNB Corporation and its subsidiaries, please visit investor.acnb.com.

Current securities

Recent company filings

  1. Other EventsSep 25, 2026
  2. 10-Q filingAug 6, 2026
  3. Other EventsJul 29, 2026
  4. Results of Operations and Financial ConditionJul 23, 2026
  5. S-8 filingMay 8, 2026

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