# EDGAR Filing Document

**Accession Number:** 0000715579
**File Stem:** 0001104659-26-057696
**Filing Date:** 2026-5
**Character Count:** 44963
**Document Hash:** 888c14ee76485033a9c9afe3f91b4021
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-057696.hdr.sgml**: 20260508

**ACCESSION NUMBER**: 0001104659-26-057696

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 15

**FILED AS OF DATE**: 20260508

**DATE AS OF CHANGE**: 20260508

**EFFECTIVENESS DATE**: 20260508

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ACNB CORP
- **CENTRAL INDEX KEY:** 0000715579
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 232233457
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295687
- **FILM NUMBER:** 26956991

**BUSINESS ADDRESS:**
- **STREET 1:** 16 LINCOLN SQUARE
- **STREET 2:** P O BOX 3129
- **CITY:** GETTYSBURG
- **STATE:** PA
- **ZIP:** 17325
- **BUSINESS PHONE:** 7173343161

**MAIL ADDRESS:**
- **STREET 1:** P O BOX 3129
- **STREET 2:** 16 LINCOLN SQUARE
- **CITY:** GETTYSBURG
- **STATE:** PA
- **ZIP:** 17325

**As filed with the Securities and Exchange Commission on May 8, 2026.**

Registration 333-________

**United States**

**Securities and Exchange Commission**

**Washington, D.C. 20549**

**FORM S-8**

**REGISTRATION STATEMENT UNDER**

**THE SECURITIES ACT OF 1933**

**ACNB CORPORATION**

(Exact name of Registrant as specified in its charter)

---

| | |
|:---|:---|
| **<u>Pennsylvania</u>**<br> (State or other jurisdiction of<br> incorporation or organization)<br>| **<u>23-2233457</u>**<br> (IRS Employer<br> Identification No.) |
| **<u>16 Lincoln Square, Gettysburg, Pennsylvania</u>**<br> (Address of principal executive offices) | **<u>17325</u>**<br> (Zip Code) |

---

**ACNB Corporation Employee Stock Purchase Plan**

(Full title of the plan)

---

| | |
|:---|:---|
| &nbsp;&nbsp; **James P. Helt**<br> **President & Chief Executive Officer**<br> **ACNB CORPORATION**<br> **16 Lincoln Square**<br> **Gettysburg, Pennsylvania 17325**<br> **(717) 264-6116**<br> (Name, address, including zip code, and telephone<br> number, including area code, of agent for service) | &nbsp;&nbsp; Copy To:<br> **Erik Gerhard, Esquire**<br> **BYBEL RUTLEDGE LLP**<br> **1017 Mumma Road, Suite 302**<br> **Lemoyne, Pennsylvania 17043**<br> **(717) 731-1700** |

---

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ◻ Accelerated filer ⌧ <br> Non-accelerated filer ◻ Smaller reporting company ◻ <br> Emerging growth company ◻

If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ◻

**EXPLANATORY NOTE**

This Registration Statement on Form S-8 (this "Registration Statement") is being filed by ACNB Corporation (the "Registrant"), relating to 300,000 shares of the Registrant's common stock, par value $2.50 per share (the "Common Stock"), issuable under the ACNB Corporation Employee Stock Purchase Plan (the "Plan"). The Plan was approved by vote of the shareholders of the Registrant at the 2026 annual meeting of shareholders of the Registrant held on May 5, 2026. This Registration Statement is being filed to register the shares of Common Stock issuable under the Plan.

**PART I**

**INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS**

The document(s) containing the information specified in this Part I will be sent or given to participants in the Plan as specified by Rule 428(b)(1) under the Securities Act of 1933, as amended (the "Securities Act"). Such documents need not be filed with the Commission either as part of this registration statement or as prospectuses or prospectus supplements pursuant to Rule 424 under the Securities Act. These documents and the documents incorporated by reference in the registration statement pursuant to Item 3 of Part II of this Form, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.

**PART II**

**INFORMATION REQUIRED IN THE REGISTRATION STATEMENT**

**Item 3.** **Incorporation of Documents by Reference.**

The Registrant incorporates the following documents by reference into this Registration Statement as filed with the Commission:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) [The Registrant's Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Commission on March 12, 2026;](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026017229/acnb-20251231.htm)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) [The Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, filed with the Commission on May 7, 2026;](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026031924/acnb-20260331.htm)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The Registrant's Current Reports on Form 8-K, filed with the Commission on [February 20, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026010034/acnb-20260219.htm) , [March 2, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026013096/acnb-20260227.htm) , [March 12, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026017204/acnb-20260312.htm) , [March 18, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026019066/acnb-20260313.htm) and [May 6, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000162828026030938/acnb-20260505.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) The description of the Registrant's Common Stock contained in the Registrant's [Form S-4 (File No. 333-282412) filed with the SEC on September 30, 2024](https://www.sec.gov/Archives/edgar/data/715579/000110465924104255/tm2423820-1_s4.htm) , including any amendment or report filed for the purpose of updating such description; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) All other reports filed pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the
 "Exchange Act"), since the end of the fiscal year covered by the Annual Report on Form 10-K referred to in (a) above.

All documents filed by the Registrant pursuant to Section 13(a), 13(c), 14 and 15(d) of the Exchange Act, on or after the date of this Registration Statement and prior to the filing of a post-effective amendment indicating that all securities offered have been sold or which deregisters all remaining unsold securities, are incorporated by reference into this Registration Statement and become a part hereof from the date of filing such documents; provided, however, that documents or information deemed to have been furnished and not filed in accordance with Commission rules shall not be deemed incorporated by reference into this Registration Statement. Any statement contained herein or in a document, all or a portion of which is incorporated by reference herein, shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement modified or superseded shall not be deemed, except as to so modified or amended, to constitute a part of this Registration Statement.

**Item 4.** **Description of Securities.**

Not Applicable.

**Item 5.** **Interests of Named Experts and Counsel.**

Not applicable.

**Item 6.** **Indemnification of Directors and Officers.**

Sections 1741 through 1743 of the Pennsylvania Business Corporation Law of 1988, as amended (the "BCL"), provide that a business corporation may indemnify directors and officers against liabilities they may incur in such capacities provided certain standards are met, including good faith and the belief that the particular action is in the best interests of the corporation. In general, this power to indemnify does not exist in the case of actions against a director or officer by or in the right of the corporation if the person entitled to indemnification shall have been adjudged to be liable to the corporation unless and only to the extent a court determines that the person is fairly and reasonably entitled to indemnification. A corporation is required to indemnify directors and officers against expenses they may incur in defending actions against them in such capacities if they are successful on the merits or otherwise in the defense of such actions. Section 1746 of the BCL provides that the foregoing provisions shall not be deemed exclusive of any other rights to which a person seeking indemnification may be entitled under, among other things, any bylaw provision, provided that no indemnification may be made in any case where the act or failure to act giving rise to the claim for indemnification is determined by a court of competent jurisdiction to have constituted willful misconduct or recklessness. Section 1747 of the BCL authorizes a corporation to purchase insurance for directors and other representatives. The foregoing statement is subject to the detailed provisions of Sections 1741 through 1750 of the BCL.

The Registrant's bylaws provide for the indemnification of directors and officers to the extent provided by the BCL. The Registrant's bylaws provide indemnification or reimbursement for reasonable expenses actually incurred by directors or officers. However, indemnification or reimbursement shall be provided only when a director or officer acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the Registrant. Directors and officers are also insured against certain liabilities for their actions, as such, by an insurance policy covering the Registrant and its subsidiaries.

**Item 7.** **Exemption from Registration Claimed.**

Not applicable.

**Item 8.** **Exhibits.**

**Exhibit**

---

| | |
|:---|:---|
| **<u>No.</u>** | **<u>Exhibits</u>** |

---

[3.1\*](tm2613604d1_ex3-1.htm) [Amended and Restated Articles of Incorporation of ACNB Corporation.](tm2613604d1_ex3-1.htm)

---

| | |
|:---|:---|
| [3.2](https://www.sec.gov/Archives/edgar/data/715579/000071557924000025/acnbcorporationamendedandr.htm) | [Amended and Restated Bylaws of ACNB Corporation. (Incorporated by reference to Exhibit 99.1 of the Registrant's Current Report on Form 8-K, filed with the Commission on February 21, 2024.)](https://www.sec.gov/Archives/edgar/data/715579/000071557924000025/acnbcorporationamendedandr.htm) |

---

[5.1\*](tm2613604d1_ex5-1.htm) [Opinion of Bybel Rutledge LLP re: Legality.](tm2613604d1_ex5-1.htm)

[23.1\*](tm2613604d1_ex23-1.htm) [Consent of Crowe LLP.](tm2613604d1_ex23-1.htm)

[23.2\*](tm2613604d1_ex5-1.htm) [Consent of Bybel Rutledge LLP (included in Exhibit 5.1).](tm2613604d1_ex5-1.htm)

---

| | |
|:---|:---|
| [24.1\*](#a_001) | [Power of Attorney of Directors and Officers (included on Signature Pages).](#a_001) |

---

---

| | |
|:---|:---|
| [99.1](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000110465926036515/tm261884-7_def14a.htm) | [ACNB Corporation Employee Stock Purchase Plan. (Incorporated herein by reference to Annex A of the Corporation's Definitive Proxy Statement filed with the Commission on March 30, 2026.)](https://www.sec.gov/ix?doc=/Archives/edgar/data/715579/000110465926036515/tm261884-7_def14a.htm) |

---

[107.1\*](tm2613604d1_ex-filingfees.htm) [Filing Fee Table.](tm2613604d1_ex-filingfees.htm)

\* Filed herewith.

**Item 9.** **Undertakings.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The undersigned Registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration
Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities
offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range
may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes
in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation
of Filing Fee Tables" in the effective Registration Statement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement
or any material change to such information in the Registration Statement;

<u>provided</u>, <u>however</u>, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) That, for the purpose of determining any liability under the Securities Act, each post-effective amendment shall be deemed to be a
new Registration Statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed
to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the
termination of the offering.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing
of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where
applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act)
that is incorporated by reference in the Registration Statement shall be deemed to be a new Registration Statement relating to the securities
offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling
persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the
Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities, other than the payment by the Registrant of expenses incurred or paid by a
director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding is asserted by such
director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion
of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication
of such issue.

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Borough of Gettysburg, Commonwealth of Pennsylvania, on May 8, 2026.

---

| | |
|:---|:---|
|  | **ACNB Corporation** |
| By: | /s/ James P. Helt |
|  | James P. Helt |
|  | President and Chief Executive Officer |

---

**POWER OF ATTORNEY**

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints James P. Helt, Jason H. Weber and Kevin J. Hayes, and each of them, his or her true and lawful attorney-in-fact, as agent with full power of substitution and resubstitution for him or her and in his or her name, place and stead, in any and all capacity, to sign any or all amendments (including post-effective amendments) to this Registration Statement and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully and to all intents and purposes as they might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on May 8, 2026.

---

| | |
|:---|:---|
| **Name** | **Capacity** |
| /s/ Alan J. Stock | Chair of the Board and Director |
| Alan J. Stock |  |
| /s/ James P. Helt | President & Chief Executive Officer |
| James P. Helt | (Principal Executive Officer) |
| /s/ Jason H. Weber | Executive Vice President/Treasurer and Chief Financial Officer |
| Jason H. Weber | (Principal Financial and Accounting Officer) |
| /s/ Elizabeth F. Carson | Director |
| Elizabeth F. Carson |  |
| /s/ Kimberly S. Chaney | Director |
| Kimberly S. Chaney |  |
| /s/ Alexandra C. Chiaruttini | Director |
| Alexandra C. Chiaruttini |  |
| /s/ Eugene J. Draganosky | Director and Second Vice Chair of the Board |
| Eugene J. Draganosky |  |
| /s/ Frank Elsner, III | Director |
| Frank Elsner, III |  |
| /s/ Todd L. Herring | Director and First Vice Chair of the Board |
| Todd L. Herring |  |
| /s/ James J. Lott | Director |
| James J. Lott |  |
| /s/ Donna M. Newell | Director |
| Donna M. Newell |  |
| /s/ John M. Polli | Director |
| John M. Polli |  |
| /s/ D. Arthur Seibel, Jr. | Director |
| D. Arthur Seibel, Jr. |  |

---

## Exhibit 3.1

**Exhibit 3.1**

**ACNB Corporation**

**Amended and Restated Articles of Incorporation**

In compliance with the requirements of 15 Pa.C.S. Section 1306 (relating to Articles of Incorporation), the undersigned, desiring to be incorporated as a business corporation, hereby state that:

1. The name of the Corporation is ACNB Corporation.

2. The address, including street and number, if any, of this Corporation's registered office in this
Commonwealth is 16 Lincoln Square, Gettysburg, PA 17325 and the county of venue is Adams.

3. The term of existence is perpetual.

4. (A) The aggregate number of shares that the Corporation shall have authority to issue is Forty Million
(40,000,000) shares of Common Stock having a par value of $2.50 per share (the "Common Stock") and Twenty Million (20,000,000)
shares of Preferred Stock having a par value of $2.50 per share (the "Preferred Stock").

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(B) The Preferred Stock may be issued from time to time by the Board of Directors as herein provided in one
or more series. The designations, relative rights, preferences and limitations of the Preferred Stock, and particularly of the shares
of each series thereof, may, to the extent permitted by law, be similar to or may differ from those of any other series. The Board of
Directors of the Corporation is hereby expressly granted authority, subject to the provisions of this Article 4, to issue Preferred
Stock, from time to time, in one or more series and to fix, from time to time, before issuance thereof, by filing a certificate pursuant
to the Business Corporation Law, the number of shares in each such series of such class and all designations, relative rights (including
the right, to the extent permitted by law, to convert into shares of any class or into shares of any series of any class), preferences
and limitations of the shares in each such series, including, but without limiting the generality of the foregoing, the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) The number of shares to constitute such series (which number may at any time, or from time to time, be
increased or decreased by the Board of Directors, notwithstanding that shares of the series may be outstanding at the time of such increase
or decrease, unless the Board of Directors shall have otherwise provided in creating such series) and the distinctive designation thereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) The dividend rate on the shares of such series, whether or not dividends on the shares of such series
shall be cumulative, and the date or dates, if any, from which dividends thereon shall be cumulative;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) Whether or not the shares of such series shall be redeemable, and, if redeemable, the date or dates upon
or after which they shall be redeemable and the amount or amounts per share (which shall be, in the case of each share, not less than
its preference upon involuntary liquidation, plus an amount equal to all dividends thereon accrued and unpaid, whether or not earned or
declared) payable thereon in the case of the redemption thereof, which amount may vary at different redemption dates or otherwise as permitted
by law;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) The right, if any, of holders of shares of such series to convert the same into, or exchange the same
for, Common Stock or other stock as permitted by law, and the terms and conditions of such conversion or exchange, as well as provisions
for adjustment of the conversion rate in such events as the Board of Directors shall determine;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) The amount per share payable on the shares of such series upon the voluntary and involuntary liquidation,
dissolution or winding up of the Corporation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vi) Whether the holders of shares of such series shall have voting power, full or limited, in addition to
the voting powers provided by law, and, in case additional voting powers are accorded, to fix the extent thereof; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vii) Generally to fix the other rights and privileges and any qualifications, limitations or restrictions of
such rights and privileges of such series, provided, however, that no such rights, privileges, qualifications, limitations or restrictions
shall be in conflict with the Articles of Incorporation of the Corporation or with the resolution or resolutions adopted by the Board
of Directors providing for the issue of any series of which there are shares then outstanding.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(C) All shares of Preferred Stock of the same series shall be identical in all respects, except that shares
of any one series issued at different times may differ as to dates, if any, from which dividends thereon may accumulate. All shares of
Preferred Stock of all series shall be of equal rank and shall be identical in all respects, except that to the extent not otherwise limited
in this Article 4 any series may differ from any other series with respect to any one or more of the designations, relative rights,
preferences and limitations described or referred to in subparagraphs (B)(i) to (vii) inclusive of this Article 4.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(D) Dividends on the outstanding Preferred Stock of each series shall be declared and paid or set apart for
payment before any dividends shall be declared and paid or set apart for payment on the Common Stock with respect to the same quarterly
dividend period. Dividends on any shares of Preferred Stock shall be cumulative only if and to the extent set forth in a certificate filed
pursuant to law. After dividends on all shares of Preferred Stock (including cumulative dividends if and to the extent any such shares
shall be entitled thereto) shall have been declared and paid or set apart for payment with respect to any quarterly dividend period, then
and not otherwise as long as any shares of Preferred Stock shall remain outstanding, dividends may be declared and paid or set apart for
payment with respect to the same quarterly dividend period on the Common Stock out of the assets or funds of the Corporation legally available
therefor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(E) All shares of Preferred Stock of all series shall be of equal rank, preference and priority as to dividends
irrespective of whether or not the rates of dividends to which the particular series of Preferred Stock shall be entitled are the same
and when the stated dividends are not paid in full, the shares of all series of Preferred Stock shall share ratably in the payment thereof
in accordance with the sums which would be payable on such shares if all dividends were paid in full, provided, however, that any two
or more series of Preferred Stock may differ from each other as to the existence and extent of the right to cumulative dividends, as aforesaid.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(F) Except as otherwise specifically provided in the certificate filed pursuant to law with respect to any
series of Preferred Stock or as otherwise provided by law, the Preferred Stock shall not have any right to vote for the election of directors
or for any other purpose, and the Common Stock shall have the exclusive right to vote for the election of directors and for all other
purposes. Each holder of Common Stock shall be entitled to one vote for each share thereof held. In all instances in which voting rights
are granted to the Preferred Stock or any series thereof, such Preferred Stock or series shall vote with the Common Stock as a single
class, except with respect to any vote for the approval of any merger, consolidation, liquidation or dissolution of the Corporation and
except as otherwise provided in the certificate filed pursuant to law with respect to any series of the Preferred Stock or as otherwise
provided by law.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(G) In the event of any liquidation, dissolution or winding up of the Corporation, whether voluntary or involuntary,
each series of Preferred Stock shall have preference and priority over the Common Stock for payment of the amount to which each outstanding
series of Preferred Stock shall be entitled in accordance with the provisions thereof and each holder of Preferred Stock shall be entitled
to be paid in full such amount, or have a sum sufficient for the payment in full set aside, before any payments shall be made to the holders
of Common Stock. If, upon liquidation, dissolution or winding up of the Corporation, the assets of the Corporation, or the proceeds thereof,
distributable among the holders of the shares of all series of Preferred Stock shall be insufficient to pay in full the preferential amount
aforesaid, then such assets, or the proceeds thereof, shall be distributed among such holders ratably in accordance with the respective
amounts which would be payable if all amounts payable thereon were paid in full. After the holders of the Preferred Stock of each series
shall have been paid in full the amounts to which they respectively shall be entitled, or a sum sufficient for the payment in full set
aside, the remaining net assets of the Corporation shall be distributed pro rata to the holders of the Common Stock in accordance with
their respective rights and interests, to the exclusion of the holders of the Preferred Stock. A consolidation or merger of the Corporation
with or into another corporation or corporations, or a sale, whether for cash, shares of stock, securities or properties, of all or substantially
all of the assets of the Corporation, shall not be deemed or construed to be a liquidation, dissolution or winding up of the Corporation
within the meaning of this Article 4.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(H) In the event that Preferred Stock of any series shall be made redeemable as provided in subparagraph (B)(iii) of
this Article 4, the Corporation, at the option of the Board of Directors, may redeem at any time or times, from time to time, all
or any part of any one or more series of Preferred Stock outstanding by paying for each share the then applicable redemption price fixed
by the Board of Directors as provided herein, plus an amount equal to accrued and unpaid dividends to the date fixed for redemption, upon
such notice and terms as may be specifically provided in the certificate filed pursuant to law with respect to such series of Preferred
Stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(I) No holder of Preferred Stock of the Corporation shall be entitled, as such, as a matter of right, to subscribe
for or purchase any part of any new or additional issue of stock of any class or series whatsoever, any rights or options to purchase
stock of any class or series whatsoever, or any securities convertible into, exchangeable for or carrying rights or options to purchase
stock of any class or series whatsoever, whether now or hereafter authorized, and whether issued for cash or other consideration or by
way of dividend.

5. The purpose or purposes of the Corporation are to have unlimited power to engage in and to do any lawful
act concerning any or all business for which corporations may be incorporated under the provisions of the Pennsylvania Business Corporation
Law of the Commonwealth of Pennsylvania. The Corporation is incorporated under the provisions of the Pennsylvania Business Corporation
Law of the Commonwealth of Pennsylvania.

6. Intentionally Omitted.

7. Cumulative voting rights shall not exist with respect to the election of directors.

8. A. The Board of Directors may, if it deems advisable, oppose a tender, or other offer for the corporation's
securities, whether the offer is in cash or in securities of a corporation or otherwise. When considering whether to oppose an offer,
the Board of Directors may, but it is not legally obligated to, consider any pertinent issues; by way of illustration, but not of limitation,
the Board of Directors may, but shall not be legally obligated to, consider any and all of the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) Whether the offer price is acceptable based on the historical and present operating results or financial
condition of the corporation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) Whether a more favorable price could be obtained for the corporation's securities in the future.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) The impact which an acquisition of the corporation would have on its employees, depositors and customers
of the corporation and its subsidiaries in the community which they serve.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) The reputation and business practices of the offeror and its management and affiliates as they would affect
the employees, depositors and customers of the corporation and its subsidiaries and the future value of the corporation's stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) The value of the securities, if any, which the offeror is offering in exchange for the corporation's
securities, based on an analysis of the worth of the corporation as compared to the corporation or other entity whose securities are being
offered.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(6) Any antitrust or other legal and regulatory issues that are raised by the offer.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B. If the Board of Directors determines that an offer should be rejected, it may take any lawful action to
accomplish its purpose including, but not limited to, any and all of the following: advising shareholders not to accept the offer; litigation
against the offeror; filing complaints with all governmental and regulatory authorities; acquiring the corporation's securities;
selling or otherwise issuing authorized but unissued securities or treasury stock or granting options with respect thereto; acquiring
a company to create an anti-trust or other regulatory problem for the offeror; and obtaining a more favorable offer from another individual
or entity.

9. No merger, consolidation, liquidation or dissolution of the Corporation, or any action that would result
in the sale or other disposition of all or substantially all of the assets of the Corporation shall be valid unless first approved by
the affirmative vote of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) the holders of at least seventy-five percent (75%) of the outstanding shares of Common Stock of the Corporation;
or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) the holders of at least fifty-one percent (51%) of the outstanding shares of Common Stock of the Corporation,
provided that such transaction has received the prior approval of at least seventy-five (75%) of the Board of Directors;

This Article 9th shall not be amended unless first approved by the affirmative vote of the holders of at least seventy-five (75%) of the outstanding shares of Common Stock of this Corporation.

10. [Removed and Reserved].

11. [Removed and Reserved].

12. No holder of shares of any class or of any series of any class shall have any preemptive right to subscribe
for, purchase or receive any shares of the corporation, whether now or hereafter authorized, or any obligations or other securities convertible
into or carrying options to purchase any such shares of the corporation, or any options or rights to purchase any such shares or securities,
issued or sold by the corporation for cash or any other form of consideration, and any such shares, securities or rights may be issued
or disposed of by the Board of Directors to such persons and on such terms as the Board in its discretion shall deem advisable.

13. Any or all classes and series of shares of the Corporation, or any part thereof, may be uncertificated
shares to the extent determined by the Board of Directors from time to time; provided, however, that in no event shall any shares represented
by a certificate be deemed uncertificated until the certificate is surrendered to the Corporation.

## Exhibit 5.1

**Exhibit 5.1**

![](tm2613604d1_ex5-1img001.jpg)

May 8, 2026

Board of Directors

ACNB Corporation

16 Lincoln Square

Gettysburg, Pennsylvania 17325

---

| | |
|:---|:---|
| **RE:** | **ACNB Corporation** |
|  | **Registration Statement on Form S-8** |

---

Ladies and Gentlemen:

We have acted as Special Counsel to ACNB Corporation, a Pennsylvania business corporation (the "Corporation"), in connection with the filing of a registration statement on Form S-8 (the "Registration Statement") pertaining to the Corporation's Employee Stock Purchase Plan (the "Plan") for the registration of 300,000 shares of common stock, par value $2.50 per share, of the Corporation with the U.S. Securities & Exchange Commission for issuance under the Plan.

In connection with the Registration Statement, we have examined the following documents:

&nbsp;&nbsp;&nbsp;&nbsp;· The Corporation's Amended and Restated Articles of Incorporation;

&nbsp;&nbsp;&nbsp;&nbsp;· The Corporation's Amended and Restated Bylaws, as amended;

&nbsp;&nbsp;&nbsp;&nbsp;· Resolutions adopted by the Corporation's Board of Directors relating
to the Registration Statement as certified by the Secretary of the Corporation;

&nbsp;&nbsp;&nbsp;&nbsp;· The Plan; and

&nbsp;&nbsp;&nbsp;&nbsp;· The Registration Statement.

In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity with the original documents of documents submitted to us as copies thereof. As to any facts material to our opinion, we have, to the extent that relevant facts were not independently established by us, relied on certificates of public officials and certificates, oaths and declarations of officers or other representatives of the Corporation.

Board of Directors

ACNB Corporation

May 8, 2026

Page 2 of 2

On the basis of the foregoing and in reliance thereon, it is our opinion that the Corporation's common stock, par value $2.50 per share, issuable under the Plan, when issued in accordance with the terms, conditions and provisions of the Plan and the Registration Statement will be legally and validly issued, fully paid and non-assessable.

In giving the foregoing opinion, we have assumed that the Corporation will have, at the time of the issuance of common stock under the Plan, a sufficient number of authorized shares available for issue.

We consent to the use of this opinion as an exhibit to the Corporation's Registration Statement and further consent to the use of our name wherever appearing in the Registration Statement and any amendments thereto. In giving this consent, we do not admit that we come within the category of persons whose consent is required under Sections 7 or 11 of the Securities Act of 1933, as amended or the rules and regulations thereunder.

---

| |
|:---|
| Very truly yours, |
| /s/ Bybel Rutledge LLP |
| BYBEL RUTLEDGE LLP |

---

## Exhibit 23.1

**Exhibit 23.1**

<u>Consent of Independent Registered Public Accounting Firm</u>

We consent to the incorporation by reference in this Registration Statement on Form S-8 of ACNB Corporation of our report dated March 12, 2026, relating to the consolidated financial statements and effectiveness of internal control over financial reporting appearing in the Annual Report on Form 10-K of ACNB Corporation for the year ended December 31, 2025.

/s/ Crowe LLP

Franklin, Tennessee

May 8, 2026

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

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| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **S-8**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **ACNB CORP**  |

---

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| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Type**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Class Title**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Calculation Rule**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount Registered**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Proposed Maximum Offering Price Per Unit**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Maximum Aggregate Offering Price**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Rate**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount of Registration Fee**  |
| 1 | Equity | Common Stock, $2.50 par value per share | Other | 300000 | $51.62 | $15486000.00 | 0.0001381 | $2138.62 |
| Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $15486000.00  |  | $2138.62  |
| Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
| Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $2138.62  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Offering Note** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> (1) In addition to the number of shares of the common stock, par value $2.50 per share (the "Common Stock") of the Registrant stated above, pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement also covers any additional shares of Common Stock that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the Registrant's outstanding shares of Common Stock. (2) Estimated solely for the purpose of determining the amount of the registration fee pursuant to Rule 457(c) and 457(h) under the Securities Act, based on the average of the high and low prices of the Common Stock on the Nasdaq Capital Market on May 4, 2026.

---

| |
|:---|
| |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

---