# EDGAR Filing Document

**Accession Number:** 0000715579
**File Stem:** 0001628280-26-026708
**Filing Date:** 2026-4
**Character Count:** 47608
**Document Hash:** 2ccc4e2143aba4de4255bcd74edcee5f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-026708.hdr.sgml**: 20260423

**ACCESSION NUMBER**: 0001628280-26-026708

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 24

**CONFORMED PERIOD OF REPORT**: 20260423

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260423

**DATE AS OF CHANGE**: 20260423

**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:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35015
- **FILM NUMBER:** 26885863

**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

?xml version='1.0' encoding='ASCII'? acnb-20260423

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

______________

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d)**

**of the Securities Exchange Act of 1934**

______________

**Date of Report (Date of earliest event reported): April 23, 2026**

**<u>ACNB Corporation</u>**

(Exact name of Registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Pennsylvania** | **1-35015** | **23-2233457** |
| (State or other<br>jurisdiction of<br>incorporation) | (Commission<br>File Number) | (IRS Employer<br>Identification No.) |

---

---

| | |
|:---|:---|
| **16 Lincoln Square, Gettysburg, PA** | **17325** |
| (Address of principal executive offices) | (Zip Code) |

---

---

| | |
|:---|:---|
| | **717.334.3161** |
| (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) |

---

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions (*see* General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the Registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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 13(a) of the Exchange Act. ☐

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| **Title Of Each Class** | **Trading Symbol(s)** | **Name Of Each Exchange On Which Registered** |
| Common Stock, $2.50 par value per share | ACNB | The NASDAQ Stock Market, LLC |

---

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**CURRENT REPORT ON FORM 8-K**

**<u>ITEM 2.02</u>**&nbsp;&nbsp;&nbsp;&nbsp;**<u>Results of Operations and Financial Condition</u>**

ACNB Corporation released financial results for the three months ended March 31, 2026, as more fully described in the attached press release dated April 23, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information furnished under this Item 2.02 of this Current Report on Form 8-K shall not be deemed to be filed for purposes of the Securities Exchange Act of 1934.

**<u>ITEM 9.01</u>&nbsp;&nbsp;&nbsp;&nbsp;<u>Financial Statements and Exhibits</u>**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Exhibits.

<u>Exhibit Number</u>&nbsp;&nbsp;&nbsp;&nbsp;<u>Description</u>

&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;<u>[99.1](pressrelease2026-q1final.htm)</u>&nbsp;&nbsp;&nbsp;&nbsp;<u>[ACNB Corporation Press Release dated April 23, 2026.](pressrelease2026-q1final.htm)</u>

104&nbsp;&nbsp;&nbsp;&nbsp;Cover Page Interactive Data File (embedded within the Inline XBRL document).

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Current Report on Form 8-K to be signed on its behalf by the undersigned, thereunto duly authorized.

---

| | | |
|:---|:---|:---|
| | | **ACNB CORPORATION** (Registrant) |
| Dated: | April 23, 2026 | /s/ Kevin J. Hayes |
| | | Kevin J. Hayes |
| | | Senior Vice President/ |
| | | General Counsel, Secretary & Chief Governance Officer |

---

## Exhibit 99.1

![](pressrelease2026-q1final001.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Jason H. Weber EVP/Treasurer & Chief Financial Officer 717.339.5090 jweber@acnb.com ACNB CORPORATION REPORTS 2026 FIRST QUARTER FINANCIAL RESULTS GETTYSBURG, PA, April 23, 2026 --- ACNB Corporation (NASDAQ: ACNB) ("ACNB" or the "Corporation"), financial holding company for ACNB Bank and ACNB Insurance Services, Inc., announced net income of $13.7 million, or $1.32 diluted earnings per share, for the three months ended March 31, 2026 compared to net loss of $272 thousand, or $0.03 diluted loss per share, for the three months ended March 31, 2025 and compared to net income of $10.8 million, or $1.04 diluted earnings per share, for the three months ended December 31, 2025. ACNB's financial results for the three months ended March 31, 2025 were impacted by two discrete items that were related to the acquisition of Traditions Bancorp, Inc. which was completed on February 1, 2025 ("Acquisition"): a provision for credit losses on non-purchase credit deteriorated ("PCD") loans of $4.2 million, net of taxes, and merger-related expenses, net of taxes, totaling $6.2 million. Financial results for the three months ended March 31, 2025 include ACNB's standalone results for the month of January 2025. The financial results for the three months ended December 31, 2025 were impacted by an after-tax loss of $2.8 million due to the repositioning of the investment securities portfolio as announced on Form 8-K on December 5, 2025 and, to a lesser extent, after-tax merger-related expenses of $447 thousand. 2026 First Quarter Highlights • Return on average assets was 1.71% and return on average equity was 12.97% for the three months ended March 31, 2026 • Fully taxable equivalent ("FTE") net interest margin was 4.46% for the three months ended March 31, 2026 compared to 4.36% for the three months ended December 31, 2025 and 4.07% for the three months ended March 31, 2025 • Total loans outstanding were $2.35 billion at March 31, 2026, an increase of 0.8% from December 31, 2025; annualized growth of 3.3% • Total noninterest-bearing deposits were $576.1 million at March 31, 2026, an increase of 4.0% from December 31, 2025; annualized growth of 16.3% Exhibit 99.1

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![](pressrelease2026-q1final002.jpg)

• Total non-performing loans to total loans, net of unearned income, was 0.41% at March 31, 2026 compared to 0.46% at December 31, 2025 and 0.43% at March 31, 2025 • Net recoveries to average loans outstanding were 0.00% for the three months ended March 31, 2026 compared to net charge-offs of 0.02% for the three months ended December 31, 2025 and net charge- offs of 0.01% for the three months ended March 31, 2025 • Tangible common equity to tangible assets ratio1 of 10.67% at March 31, 2026 compared to 10.60% at December 31, 2025 and 9.33% at March 31, 2025 • ACNB repurchased 73,972 shares of ACNB common stock in open market transactions for the three months ended March 31, 2026 at a weighted average price of $47.54 per share. There are 123,099 shares remaining in the current plan "We are pleased to report a strong start to 2026, highlighted by solid profitability, stable asset quality, and continued balance sheet growth. Our results reflect the strength of our core relationship banking strategy, disciplined expense management, and consistent execution across the franchise." said James P. Helt, ACNB Corporation President and Chief Executive Officer. "Loan growth was healthy during the quarter, supported by a solid pipeline and continued demand across our markets, while deposit growth remained robust and well-balanced, reinforcing our strong liquidity position. Importantly, credit quality metrics remained stable, with low levels of non-performing assets and net charge- offs, underscoring the effectiveness of our conservative underwriting approach." Mr. Helt continued, "We also maintained strong capital levels, providing both financial flexibility and a solid foundation to support future growth. As we move further into 2026, we remain focused on delivering sustainable earnings, maintaining disciplined risk management, and creating long-term value for our shareholders." Net Interest Income and Margin Net interest income for the three months ended March 31, 2026 totaled $32.5 million, an increase of $5.4 million from the three months ended March 31, 2025 and a decrease of $336 thousand from the three months ended December 31, 2025. The FTE net interest margin for the three months ended March 31, 2026 was 4.46%, a 39 basis points increase from the three months ended March 31, 2025 and a 10 basis points increase from the three months ended December 31, 2025. The increase in net interest income and FTE net interest margin compared to the three months ended March 31, 2025 was driven primarily by the balance sheet restructuring completed during the three months ended December 31, 2025, the Acquisition and new loans and securities funded during the quarter at higher rates than those that paid off or matured. The FTE yield on total investment securities was 3.66% for the three months ended March 31, 2026, an increase of 75 basis points compared to the three months ended March 31, 2025. Increases in average balances and yields compared to the same period of the prior year were driven primarily by the impact of the Acquisition. For the three months ended March 31, 2026, total average loans increased $208.6 million, or 9.8%, compared to the three months ended March 31, 2025. The FTE yield on total loans was 6.35% for the three months ended March 31, 2026, an increase of 27 basis points compared to the three months ended March 31, 2025. For the three months ended March 31, 2026, total average interest-bearing deposits increased $151.8 million, or 8.6%, from the three months ended March 31, 2025. The average rate paid on interest- bearing deposits was 1.35% for the three months ended March 31, 2026, a decrease of 3 basis points from the ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 2 of 12 1 Non-GAAP financial measure. Please refer to the calculation on the page titled "Non-GAAP Reconciliation" at the end of this document.

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![](pressrelease2026-q1final003.jpg)

three months ended March 31, 2025. For the three months ended March 31, 2026, total average noninterest- bearing demand deposits increased $41.6 million, or 8.1%, from the three months ended March 31, 2025 driven primarily by the Acquisition and promotional incentives on commercial checking accounts. The decrease in net interest income compared to the three months ended December 31, 2025 was driven primarily by fewer days of interest accruals and, to a lesser extent, the decrease in total average earning assets of $27.6 million, or 0.9%. The decrease in interest-earning assets was driven primarily by lower invested cash balances due to the seasonal decline in the balance of one commercial deposit account as well as lower average loans held for sale and loans held for investment. While average loan balances declined, total loans increased as a result of loan closings that occurred at the end of the three months ended March 31, 2026. The FTE net interest margin increased 10 basis points compared to the three months ended December 31, 2025 driven primarily by the impact of the balance sheet restructuring completed during the three months ended December 31, 2025. The FTE yield on total investment securities increased 49 basis points compared to the three months ended December 31, 2025. For the three months ended March 31, 2026, total average interest-bearing deposits increased $3.4 million, or 0.2%, from the three months ended December 31, 2025. The average rate paid on interest-bearing deposits decreased 1 basis point from the three months ended December 31, 2025. The accretion impact of acquisition accounting adjustments on loans and deposits from the Acquisition was $1.9 million, $1.5 million and $1.9 million for the three months ended March 31, 2026, the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively. Noninterest Income Noninterest income for the three months ended March 31, 2026 was $8.3 million, an increase of $1.1 million and $3.9 million from the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively. The increase compared to the three months ended March 31, 2025 was driven primarily by the Acquisition and compared to the three months ended December 31, 2025 was driven primarily by the repositioning of the investment securities portfolio, which generated a $3.6 million pre-tax loss on the sale of investment securities. Gain from mortgage loans held for sale for the three months ended March 31, 2026 was $1.2 million, an increase of $371 thousand from the three months ended March 31, 2025 driven primarily by the Acquisition. Earnings on investment in bank-owned life insurance was $737 thousand for the three months ended March 31, 2026, a $157 thousand increase from the three months ended March 31, 2025 driven primarily by the purchase of new policies in the third quarter of 2025 and the Acquisition. The sale of a building contributed a $177 thousand gain on assets held for sale and a death benefit contributed a $174 thousand gain on life insurance proceeds for the three months ended March 31, 2026. Service charges on deposits totaled $1.2 million, a $141 thousand increase compared to the three months ended March 31, 2025 driven primarily by the Acquisition. Wealth management income was $1.2 million, a $100 thousand increase compared to the three months ended March 31, 2025 driven primarily by growth of fee-based assets under management/ administration. Other totaled $489 thousand, a $140 thousand increase primarily attributable to a gain on a loan sale compared to the three months ended March 31, 2025. Excluding the net gains (losses) on sales or calls of investment securities, the increase in noninterest income compared to the three months ended December 31, 2025 was impacted by a gain on life insurance proceeds of $174 thousand and the gain on assets held for sale of $177 thousand. Insurance commissions were $2.1 million, a $246 thousand increase compared to the three months ended December 31, 2025 driven primarily by higher renewals and the policy cancellation of a customer in the prior quarter. Partially offsetting the increase in noninterest income were lower gains from mortgage loans held for sale, service charges on deposits and ATM debit charges primarily driven by seasonality. ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 3 of 12

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![](pressrelease2026-q1final004.jpg)

Noninterest Expense Noninterest expense for the three months ended March 31, 2026 was $23.6 million, a decrease of $5.7 million from the three months ended March 31, 2025, driven primarily by the Acquisition, and an increase of $162 thousand from the three months ended December 31, 2025. Merger-related expenses totaled $8.0 million for the three months ended March 31, 2025 and $575 thousand for the three months ended December 31, 2025 compared to no merger-related expenses for the three months ended March 31, 2026. Salaries and employee benefits expense for the three months ended March 31, 2026 increased $1.2 million and $1.0 million compared to the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively. The increase from the three months ended March 31, 2025 was driven primarily by additional employees attributable to the Acquisition as well as merit increases. The increase from the three months ended December 31, 2025 was driven primarily by seasonal expenses of $600 thousand related to incentive stock awards and $270 thousand related to ACNB's liability for unused vacation days, which was driven primarily by headcount increases due to the Acquisition. Equipment expense increased $320 thousand and $244 thousand from the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively, driven primarily by the Acquisition and the implementation of additional products into our core processing system compared to the three months ended March 31, 2025 and higher core processing and hardware expense compared to the three months ended December 31, 2025. Net occupancy for the three months ended March 31, 2026 increased $91 thousand and $292 thousand compared to the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively. The increase compared to the three months ended March 31, 2025 was driven primarily by the Acquisition, and the increase compared to the three months ended December 31, 2025 was driven primarily by seasonally higher snow removal and utility expenses. Professional services increased $101 thousand and decreased $74 thousand compared to the three months ended March 31, 2025 and the three months ended December 31, 2025, respectively. The increase compared to the three months ended March 31, 2025 was driven primarily by the higher professional services for software integration and legal fees, and the decrease from the three months ended December 31, 2025 was driven primarily by higher consulting fees in 2025. Intangible assets amortization increased $199 thousand compared to the three months ended March 31, 2025 and decreased $74 thousand compared to the three months ended December 31, 2025. The increase was a result of the Acquisition and the decrease was a result of normal attrition. Other increased $343 thousand compared to the three months ended March 31, 2025 and decreased $666 thousand for the three months ended December 31, 2025. The increase from the three months ended March 31, 2025 was driven primarily by higher internet banking expenses and supplies and postage, and the decrease was driven primarily by a $475 thousand write-off of legacy accounts receivable at the insurance subsidiary and higher mortgage underwriting and software expenses during the three months ended December 31, 2025. ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 4 of 12

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![](pressrelease2026-q1final005.jpg)

Loans and Asset Quality Total loans outstanding were $2.35 billion at March 31, 2026, an increase of $18.7 million from December 31, 2025 and an increase of $27.0 million from March 31, 2025. The increase compared to December 31, 2025 was driven primarily by growth in the commercial real estate portfolio and was partially offset by a decrease in real estate construction. The growth in commercial real estate was spread across a variety of industries, including non-owner occupied apartment complex, owner occupied and non-owner occupied farming, non-owner occupied warehouse and owner occupied office complex categories. The allowance for credit losses was $23.6 million at March 31, 2026, a decrease of $57 thousand compared to December 31, 2025 and a decrease of $1.0 million compared to March 31, 2025. The decrease compared to December 31, 2025 was driven primarily by the movement of higher risk rated construction loans to lower risk rated commercial real estate loans and the paydowns of loans with a specific reserve partially offset by loan growth. The decrease compared to March 31, 2025 was driven primarily by the incorporation of post-COVID lower credit loss history in the bank's allowance for credit losses model. Total non-performing loans to total loans, net of unearned income, decreased to 0.41% as of March 31, 2026, from 0.46% and 0.43% at December 31, 2025 and March 31, 2025, respectively. The decreases from December 31, 2025 and March 31, 2025 were driven by payments received on nonperforming loans. Deposits and Borrowings Total deposits were $2.53 billion at March 31, 2026, an increase of $75.6 million from December 31, 2025 and a decrease of $14.2 million from March 31, 2025. Included in total deposits at March 31, 2026 were $576.1 million of noninterest-bearing deposits, which increased $22.2 million and $13.4 million from December 31, 2025 and March 31, 2025, respectively, driven primarily by growth in commercial balances due to promotional incentives on commercial checking accounts. Total interest-bearing deposits were $1.95 billion at March 31, 2026, an increase of $53.4 million from December 31, 2025 and a decrease of $27.6 million from March 31, 2025. Money markets, included in interest-bearing deposits, increased $11.2 million since December 31, 2025 and decreased $52.7 million since March 31, 2025. The increase in money market deposits from December 31, 2025 was driven primarily by growth in balances of both consumer and commercial accounts and the decrease from March 31, 2025 was driven primarily by attrition of higher cost money market deposits from the Acquisition. Time deposits increased $35.6 million and $11.4 million since December 31, 2025 and March 31, 2025, respectively. Included in time deposits were $89.1 million brokered time deposits, an increase of $30.0 million from December 31, 2025 and $35.0 million from March 31, 2025, respectively. Total borrowings were $279.2 million at March 31, 2026, a decrease of $40.9 million and $20.3 million compared to December 31, 2025 and March 31, 2025, respectively. On February 27, 2026, the Corporation paid off a $40.0 million FHLB 4.99% fixed rate advance as a result of excess liquidity during the quarter. Stockholders' Equity Total stockholders' equity was $425.5 million at March 31, 2026 compared to $420.0 million at December 31, 2025 and $386.9 million at March 31, 2025. The increase at March 31, 2026 compared to December 31, 2025 was driven primarily by net income of $13.7 million partially offset by dividends paid of $3.9 million, common stock repurchases of $3.6 million, and a $1.3 million change in unrealized losses in available for sale investment securities. The increase at March 31, 2026 compared to March 31, 2025 was driven primarily by growth in retained earnings and a change in unrealized losses in available for sale investment securities. Tangible book value1 per share was $32.99, $32.22 and $28.23 at March 31, 2026, December 31, 2025 and March 31, 2025, respectively. ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 5 of 12 1 Non-GAAP financial measure. Please refer to the calculation on the page titled "Non-GAAP Reconciliation" at the end of this document.

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![](pressrelease2026-q1final006.jpg)

About ACNB Corporation ACNB Corporation, headquartered in Gettysburg, PA, is the independent $3.27 billion financial holding company for the wholly-owned subsidiaries of ACNB Bank, Gettysburg, PA, including its operating divisions Traditions Bank and Traditions Mortgage, 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 33 community banking offices and two loan offices located in the Pennsylvania counties of Adams, Berks, 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, MD and Gettysburg, PA. For more information regarding ACNB Corporation and its subsidiaries, please visit investor.acnb.com. # # # SAFE HARBOR AND FORWARD-LOOKING STATEMENTS - Should there be a material subsequent event prior to the filing of the Quarterly Report on Form 10-Q with the Securities and Exchange Commission, the financial information reported in this press release is subject to change to reflect the subsequent event. In addition to historical information, this press release may contain forward-looking statements. Examples of forward-looking statements include, but are not limited to, (a) projections or statements regarding future earnings, expenses, net interest income, other income, earnings or loss per share, asset mix and quality, growth prospects, capital structure, and other financial terms, (b) statements of plans and objectives of Management or the Board of Directors, and (c) statements of assumptions, such as economic conditions in the Corporation's market areas. Such forward-looking statements can be identified by the use of forward-looking terminology such as "believes", "expects", "may", "intends", "will", "should", "anticipates", or the negative of any of the foregoing or other variations thereon or comparable terminology, or by discussion of strategy. Forward-looking statements are subject to certain risks and uncertainties such as national, regional and local economic conditions, competitive factors, and regulatory limitations. Actual results may differ materially from those projected in the forward-looking statements. Such risks, uncertainties, and other factors that could cause actual results and experience to differ from those projected include, but are not limited to, the following: short-term and long-term effects of inflation and rising costs on the Corporation, customers and economy; banking instability caused by bank failures and financial uncertainty of various banks which may adversely impact the Corporation and its securities and loan values, deposit stability, capital adequacy, financial condition, operations, liquidity, and results of operations; effects of governmental and fiscal policies, as well as legislative and regulatory changes; effects of new laws and regulations (including laws and regulations concerning taxes, banking, securities and insurance) and their application with which the Corporation and its subsidiaries must comply; impacts of the capital and liquidity requirements of the Basel III standards; effects of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Financial Accounting Standards Board and other accounting standard setters; ineffectiveness of the business strategy due to changes in current or future market conditions; future actions or inactions of the United States government, including the effects of short-term and long-term federal budget and tax negotiations and a failure to increase the government debt limit or a prolonged shutdown of the federal government; effects of economic conditions particularly with regard to the negative impact of any pandemic, epidemic or health-related crisis and the responses thereto on the operations of the Corporation and current customers, specifically the effect of the economy on loan customers' ability to repay loans; effects of competition, and of changes in laws and regulations on competition, including industry consolidation and development of competing financial products and services; inflation, securities market and monetary fluctuations; risks of changes in interest rates on the level and composition of deposits, loan demand, and the values of loan collateral, securities, and interest rate protection agreements, as well as interest rate risks; difficulties in acquisitions and integrating and operating acquired business operations, including information technology difficulties; challenges in establishing and maintaining operations in new markets; effects of technology changes; effects of general economic conditions and more specifically in the Corporation's market areas; failure of assumptions underlying the establishment of reserves for credit losses and estimations of values of collateral and various financial assets and liabilities; acts of war or terrorism or geopolitical instability; disruption of credit and equity markets; ability to manage current levels of impaired assets; loss of certain key officers; ability to maintain the value and image of the Corporation's brand and protect the Corporation's intellectual property rights; continued relationships with major customers; and, potential impacts to the Corporation from continually evolving cybersecurity and other technological risks and attacks, including additional costs, reputational damage, regulatory penalties, and financial losses. Management considers subsequent events occurring after the balance sheet date for matters which may require adjustment to, or disclosure in, the consolidated financial statements. The review period for subsequent events extends up to and including the filing date of the Corporation's consolidated financial statements when filed with the SEC. Accordingly, the financial information in this announcement is subject to change. We caution readers not to place undue reliance on these forward-looking statements. They only reflect Management's analysis as of this date. The Corporation does not revise or update these forward-looking statements to reflect events or changed circumstances. Please carefully review the risk factors described in other documents the Corporation files from time to time with the SEC, including the Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q. Please also carefully review any Current Reports on Form 8-K filed by the Corporation with the SEC. ACNB #2026-02 April 23, 2026 ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 6 of 12

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ACNB Corporation Financial Highlights Selected Financial Data by Respective Quarter End (Unaudited) (Dollars in thousands, except per share data) March 31, 2026 December 31, 2025 September 30, 2025 June 30, 2025 March 31, 2025 BALANCE SHEET DATA Total assets $3,269,864 $3,228,126 $3,250,838 $3,259,528 $3,270,041 Investment securities 535,760 531,131 526,570 520,758 521,306 Total loans, net of unearned income 2,349,245 2,330,514 2,336,605 2,341,816 2,322,209 Allowance for credit losses (23,615) (23,672) (23,660) (24,353) (24,646) Deposits 2,525,772 2,450,185 2,465,896 2,524,541 2,540,009 Allowance for unfunded commitments 1,818 1,831 1,384 1,529 1,883 Borrowings 279,215 320,116 335,833 298,395 299,531 Stockholders' equity 425,476 419,974 408,642 395,151 386,883 INCOME STATEMENT DATA Interest and dividend income $42,232 $42,856 $42,490 $41,576 $36,290 Interest expense 9,717 10,005 10,353 10,564 9,200 Net interest income 32,515 32,851 32,137 31,012 27,090 (Reversal of) provision for credit losses (76) 106 (584) (228) 5,968 (Reversal of) provision for unfunded commitments (13) 447 (145) (354) (480) Net interest income after (reversal of) provisions for credit losses and unfunded commitments 32,604 32,298 32,866 31,594 21,602 Noninterest income 8,274 4,332 8,411 8,682 7,184 Noninterest expenses 23,615 23,453 22,361 25,366 29,335 Income (loss) before income taxes 17,263 13,177 18,916 14,910 (549) Income tax expense (benefit) 3,560 2,372 4,046 3,262 (277) Net income (loss) $13,703 $10,805 $14,870 $11,648 $(272) PROFITABILITY RATIOS Total loans, net of unearned income to deposits 93.01 % 95.12 % 94.76 % 92.76 % 91.43 % Return on average assets (annualized) 1.71 1.30 1.80 1.43 (0.04) Return on average equity (annualized) 12.97 10.31 14.66 11.96 (0.31) Efficiency ratio1 55.84 53.39 51.96 56.21 60.13 FTE Net interest margin 4.46 4.36 4.27 4.21 4.07 Yield on average earning assets 5.78 5.69 5.64 5.64 5.45 Yield on investment securities 3.66 3.17 3.03 2.95 2.91 Yield on total loans 6.35 6.33 6.29 6.29 6.08 Cost of funds 1.41 1.40 1.45 1.50 1.45 PER SHARE DATA Diluted earnings (loss) per share $1.32 $1.04 $1.42 $1.11 $(0.03) Cash dividends paid per share 0.38 0.38 0.34 0.34 0.32 Tangible book value per share1 32.99 32.22 30.87 29.30 28.23 CAPITAL RATIOS2 Tier 1 leverage ratio 11.74 % 11.40 % 11.22 % 10.97 % 11.81 % Common equity tier 1 ratio 14.92 14.74 14.45 13.96 13.65 Tier 1 risk based capital ratio 15.14 14.96 14.67 14.17 13.86 Total risk based capital ratio 16.73 16.54 16.22 15.75 15.45 CREDIT QUALITY Net (recoveries) charge-offs to average loans outstanding (annualized) (0.00) % 0.02 % 0.02 % 0.01 % 0.01 % Total non-performing loans to total loans, net of unearned income3 0.41 0.46 0.43 0.43 0.43 Total non-performing assets to total assets4 0.29 0.33 0.31 0.31 0.32 Allowance for credit losses to total loans, net of unearned income 1.01 1.02 1.01 1.04 1.06 ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 7 of 12 1 Non-GAAP financial measure. Please refer to the calculation on the page titled "Non-GAAP Reconciliation" at the end of this document. 2 Regulatory capital ratios as of March 31, 2026 are preliminary. 3 Non-performing loans consists of loans on nonaccrual status and loans greater than 90 days past due and still accruing interest. 4 Non-performing assets consists of non-performing loans and foreclosed assets held for resale.

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Consolidated Statements of Condition (Unaudited) (Dollars in thousands, except per share data) March 31, 2026 December 31, 2025 March 31, 2025 ASSETS Cash and due from banks $25,649 $20,611 $23,422 Interest-bearing deposits with banks 67,986 45,037 100,141 Total Cash and Cash Equivalents 93,635 65,648 123,563 Equity securities with readily determinable fair values 942 949 933 Investment securities available for sale, at estimated fair value 471,659 466,894 455,819 Investment securities held to maturity, at amortized cost (fair value $56,248, $57,537 and $56,219) 63,159 63,288 64,554 Loans held for sale 15,155 28,170 21,413 Total loans, net of unearned income 2,349,245 2,330,514 2,322,209 Less: Allowance for credit losses (23,615) (23,672) (24,646) Loans, net 2,325,630 2,306,842 2,297,563 Premises and equipment, net 30,373 30,648 32,398 Right of use asset 4,053 4,155 5,440 Restricted investment in bank stocks 12,574 14,237 13,560 Investment in bank-owned life insurance 105,667 105,840 98,814 Investments in low-income housing partnerships 720 751 846 Goodwill 64,449 64,449 64,449 Intangible assets, net 21,379 22,435 25,835 Assets held for sale — 275 — Other assets 60,469 53,545 64,854 Total Assets $3,269,864 $3,228,126 $3,270,041 LIABILITIES AND STOCKHOLDERS' EQUITY Deposits: Noninterest-bearing $576,056 $553,855 $562,700 Interest-bearing 1,949,716 1,896,330 1,977,309 Total Deposits 2,525,772 2,450,185 2,540,009 Short-term borrowings 63,828 64,740 44,188 Long-term borrowings 215,387 255,376 255,343 Lease liability 4,352 4,451 5,790 Allowance for unfunded commitments 1,818 1,831 1,883 Other liabilities 33,231 31,569 35,945 Total Liabilities 2,844,388 2,808,152 2,883,158 Stockholders' Equity: Preferred Stock, $2.50 par value, 20,000,000 shares authorized; no shares outstanding at March 31, 2026, December 31, 2025 and March 31, 2025 — — — Common stock, $2.50 par value, 20,000,000 shares authorized; 11,068,063, 11,028,152, and 11,011,051 shares issued; 10,338,190, 10,372,251, and 10,543,671 shares outstanding at March 31, 2026, December 31, 2025 and March 31, 2025, respectively 27,664 27,564 27,521 Treasury stock, at cost, 729,873, 655,901, and 467,380 at March 31, 2026, December 31, 2025, and March 31, 2025, respectively (25,927) (22,367) (14,309) Additional paid-in capital 180,132 179,658 178,011 Retained earnings 267,066 257,293 230,978 Accumulated other comprehensive loss (23,459) (22,174) (35,318) Total Stockholders' Equity 425,476 419,974 386,883 Total Liabilities and Stockholders' Equity $3,269,864 $3,228,126 $3,270,041 ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 8 of 12

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Consolidated Income (Loss) Statements (Unaudited) Three Months Ended (Dollars in thousands, except per share data) March 31, 2026 December 31, 2025 March 31, 2025 INTEREST AND DIVIDEND INCOME Loans, including fees: Taxable $36,302 $37,293 $31,676 Tax-exempt 338 343 292 Investment securities: Taxable 4,241 3,580 2,902 Tax-exempt 314 297 288 Dividends 334 320 340 Other 703 1,023 792 Total Interest and Dividend Income 42,232 42,856 36,290 INTEREST EXPENSE Deposits 6,387 6,547 5,996 Short-term borrowings 563 491 294 Long-term borrowings 2,767 2,967 2,910 Total Interest Expense 9,717 10,005 9,200 Net Interest Income 32,515 32,851 27,090 (Reversal of) provision for credit losses (76) 106 5,968 (Reversal of) provision for unfunded commitments (13) 447 (480) Net Interest Income after (Reversal of) Provisions for Credit Losses and Unfunded Commitments 32,604 32,298 21,602 NONINTEREST INCOME Insurance commissions 2,128 1,882 2,147 Gain from mortgage loans held for sale 1,226 1,373 855 Service charges on deposits 1,235 1,282 1,094 Wealth management 1,160 1,200 1,060 ATM debit card charges 906 923 831 Earnings on investment in bank-owned life insurance 737 735 580 Gain on assets held for sale 177 — — Gain on life insurance proceeds 174 — 254 Other 489 490 349 Net gains (losses) on sales or calls of investment securities 49 (3,557) — Net (losses) gains on equity securities (7) 4 14 Total Noninterest Income 8,274 4,332 7,184 NONINTEREST EXPENSES Salaries and employee benefits 14,027 13,034 12,861 Equipment 2,600 2,356 2,280 Net occupancy 1,533 1,241 1,442 Intangible assets amortization 1,056 1,130 857 Professional services 678 752 577 Other tax 577 539 527 FDIC and regulatory 442 458 401 Merger-related — 575 8,031 Other 2,702 3,368 2,359 Total Noninterest Expenses 23,615 23,453 29,335 Income (Loss) Before Income Taxes 17,263 13,177 (549) Income tax expense (benefit) 3,560 2,372 (277) Net Income (Loss) $13,703 $10,805 $(272) PER SHARE DATA Basic earnings (loss) $1.32 $1.04 $(0.03) Diluted earnings (loss) $1.32 $1.04 $(0.03) Weighted average shares basic 10,348,531 10,351,613 9,806,299 Weighted average shares diluted 10,366,230 10,386,137 9,823,475 ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 9 of 12

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Average Balances, Income and Expenses, Yields and Rates Three Months Ended Three Months Ended Three Months Ended Three Months Ended Three Months Ended March 31, 2026 December 31, 2025 September 30, 2025 June 30, 2025 March 31, 2025 (Dollars in thousands) Average Balance Interest1 Yield/ Rate Average Balance Interest1 Yield/ Rate Average Balance Interest1 Yield/ Rate Average Balance Interest1 Yield/ Rate Average Balance Interest1 Yield/ Rate ASSETS Loans: Taxable $2,290,463 $36,302 6.43 % $2,305,296 $37,293 6.42 % $2,298,054 $36,961 6.38 % $2,296,429 $36,555 6.38 % $2,080,231 $31,676 6.18 % Tax-exempt 56,344 428 3.08 58,740 434 2.93 58,587 410 2.78 58,903 401 2.73 57,969 370 2.59 Total Loans2 2,346,807 36,730 6.35 2,364,036 37,727 6.33 2,356,641 37,371 6.29 2,355,332 36,956 6.29 2,138,200 32,046 6.08 Investment Securities: Taxable 494,221 4,575 3.75 480,987 3,900 3.22 485,309 3,762 3.08 482,933 3,590 2.98 447,986 3,242 2.93 Tax-exempt 56,036 397 2.87 54,518 376 2.74 53,165 356 2.66 54,261 358 2.65 54,659 365 2.71 Total Investments3 550,257 4,972 3.66 535,505 4,276 3.17 538,474 4,118 3.03 537,194 3,948 2.95 502,645 3,607 2.91 Interest-bearing deposits with banks 76,769 703 3.71 101,846 1,023 3.99 103,290 1,162 4.46 77,348 831 4.31 73,181 792 4.39 Total Earning Assets 2,973,833 42,405 5.78 3,001,387 43,026 5.69 2,998,405 42,651 5.64 2,969,874 41,735 5.64 2,714,026 36,445 5.45 Cash and due from banks 24,482 25,686 26,709 25,610 20,603 Premises and equipment 30,611 31,297 31,514 32,019 29,903 Other assets 249,769 250,508 245,899 255,624 224,522 Allowance for credit losses (23,682) (23,646) (24,312) (24,615) (19,939) Total Assets $3,255,013 $3,285,232 $3,278,215 $3,258,512 $2,969,115 LIABILITIES Interest-bearing demand deposits $616,311 $460 0.30 % $633,593 $545 0.34 % $616,565 $570 0.37 % $612,812 $514 0.34 % $573,341 $524 0.37 % Money markets 489,957 2,227 1.84 491,932 2,322 1.87 510,655 2,530 1.97 536,755 2,706 2.02 447,297 1,984 1.80 Savings deposits 335,398 26 0.03 331,309 27 0.03 335,083 26 0.03 342,327 27 0.03 331,103 27 0.03 Time deposits 472,621 3,674 3.15 454,083 3,653 3.19 454,625 3,746 3.27 473,589 4,037 3.42 410,749 3,461 3.42 Total Interest-Bearing Deposits 1,914,287 6,387 1.35 1,910,917 6,547 1.36 1,916,928 6,872 1.42 1,965,483 7,284 1.49 1,762,490 5,996 1.38 Short-term borrowings 74,562 563 3.06 69,326 491 2.81 70,389 513 2.89 44,515 341 3.07 38,721 294 3.08 Long-term borrowings 243,880 2,767 4.60 255,369 2,967 4.61 255,358 2,968 4.61 255,347 2,939 4.62 257,558 2,910 4.58 Total Borrowings 318,442 3,330 4.24 324,695 3,458 4.23 325,747 3,481 4.24 299,862 3,280 4.39 296,279 3,204 4.39 Total Interest-Bearing Liabilities 2,232,729 9,717 1.77 2,235,612 10,005 1.78 2,242,675 10,353 1.83 2,265,345 10,564 1.87 2,058,769 9,200 1.81 Noninterest-bearing demand deposits 554,591 592,956 593,800 563,321 512,966 Other liabilities 39,174 40,963 39,397 39,271 36,934 Stockholders' Equity 428,519 415,701 402,343 390,575 360,446 Total Liabilities and Stockholders' Equity $3,255,013 $3,285,232 $3,278,215 $3,258,512 $2,969,115 Taxable Equivalent Net Interest Income 32,688 33,021 32,298 31,171 27,245 Taxable Equivalent Adjustment (173) (170) (161) (159) (155) Net Interest Income $32,515 $32,851 $32,137 $31,012 $27,090 Cost of Funds 1.41% 1.40 % 1.45 % 1.50 % 1.45% FTE Net Interest Margin 4.46% 4.36 % 4.27 % 4.21 % 4.07% ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 10 of 12 1 Income on interest-earning assets has been computed on a fully taxable equivalent (FTE) basis using the 21% federal income tax statutory rate. 2 Average balances include non-accrual loans and are net of unearned income. 3 Average balances of investment securities is computed at fair value.

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Loan and Deposit Detail by Type Variance (Dollars in thousands) March 31, 2026 December 31, 2025 March 31, 2025 March 2026 vs. December 2025 March 2026 vs. March 2025 Loans Commercial real estate $1,301,807 $1,273,813 $1,254,402 $27,994 $47,405 Residential mortgage 602,305 599,051 591,488 3,254 10,817 Commercial and industrial 204,714 205,452 220,774 (738) (16,060) Home equity lines of credit 126,473 127,341 119,085 (868) 7,388 Real estate construction 106,128 116,680 127,663 (10,552) (21,535) Consumer 9,864 10,140 10,526 (276) (662) Gross loans 2,351,291 2,332,477 2,323,938 18,814 27,353 Unearned income (2,046) (1,963) (1,729) (83) (317) Total loans, net of unearned income $2,349,245 $2,330,514 $2,322,209 $18,731 $27,036 Variance (Dollars in thousands) March 31, 2026 December 31, 2025 March 31, 2025 March 2026 vs. December 2025 March 2026 vs. March 2025 Deposits Noninterest-bearing demand deposits $576,056 $553,855 $562,700 $22,201 $13,356 Interest-bearing demand deposits 625,363 623,620 609,187 1,743 16,176 Money market 497,031 485,808 549,704 11,223 (52,673) Savings 338,763 333,973 341,291 4,790 (2,528) Total demand and savings 2,037,213 1,997,256 2,062,882 39,957 (25,669) Time 488,559 452,929 477,127 35,630 11,432 Total deposits $2,525,772 $2,450,185 $2,540,009 $75,587 $(14,237) ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 11 of 12

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Non-GAAP Reconciliation Note: The Corporation has presented the following non-GAAP financial measures because it believes that these measures provide useful and comparative information to assess trends in the Corporation's results of operations and financial condition. These non-GAAP financial measures are frequently used by securities analysts, investors and other interested parties in the evaluation of companies in the Corporation's industry. Investors should recognize that the Corporation's presentation of these non- GAAP financial measures might not be comparable to similarly-titled measures of other corporations. These non-GAAP financial measures should not be considered a substitute for GAAP basis measures, and the Corporation strongly encourages a review of its condensed consolidated financial statements in their entirety. Tangible book value per share Stockholders' equity $425,476 $419,974 $408,642 $395,151 $386,883 Less: Goodwill and intangible assets (85,828) (86,884) (88,014) (89,143) (90,284) Tangible common stockholders' equity (numerator) $339,648 $333,090 $320,628 $306,008 $296,599 Shares outstanding, less unvested shares, end of period (denominator) 10,296,825 10,337,757 10,387,135 10,442,269 10,506,822 Tangible book value per share $32.99 $32.22 $30.87 $29.30 $28.23 Tangible common equity to tangible assets (TCE/TA Ratio) Tangible common stockholders' equity (numerator) $339,648 $333,090 $320,628 $306,008 $296,599 Total assets $3,269,864 $3,228,126 $3,250,838 $3,259,528 $3,270,041 Less: Goodwill and intangible assets (85,828) (86,884) (88,014) (89,143) (90,284) Total tangible assets (denominator) $3,184,036 $3,141,242 $3,162,824 $3,170,385 $3,179,757 Tangible common equity to tangible assets 10.67 % 10.60 % 10.14 % 9.65 % 9.33 % Efficiency Ratio Noninterest expense $23,615 $23,453 $22,361 $25,366 $29,335 Less: Intangible amortization 1,056 1,130 1,129 1,141 857 Less: Merger-related expense — 575 169 1,943 8,031 Noninterest expense (numerator) $22,559 $21,748 $21,063 $22,282 $20,447 Net interest income $32,515 $32,851 $32,137 $31,012 $27,090 Plus: Total noninterest income 8,274 4,332 8,411 8,682 7,184 Less: Gain on assets held for sale 177 — — — — Less: Gain on life insurance proceeds 174 — — 31 254 Less: Net gains (losses) on sales or calls of securities 49 (3,557) — 22 — Less: Net (losses) gains on equity securities (7) 4 9 3 14 Total revenue (denominator) $40,396 $40,736 $40,539 $39,638 $34,006 Efficiency ratio 55.84 % 53.39 % 51.96 % 56.21 % 60.13 % Three Months Ended (Dollars in thousands, except per share data) March 31, 2026 December 31, 2025 September 30, 2025 June 30, 2025 March 31, 2025 ACNB Corporation Press Release/2026 First Quarter Financial Results April 23, 2026 Page 12 of 12

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