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Earnings Per Share | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Earnings Per Share and Restricted Stock | Earnings Per Share The Corporation has a simple capital structure. Basic earnings per share of common stock is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding less unvested restricted stock at the end of the period. Diluted earnings per share is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
2025 |  | 2024 |  | 2025 |  | 2024
Weighted average shares outstanding (basic) | 10,419,581 |  |  | 8,507,140 |  |  | 10,228,029 |  |  | 8,500,860 |
Dilutive effect of unvested shares | 35,880 |  |  | 38,438 |  |  | 29,771 |  |  | 31,831 |
Weighted average shares outstanding (diluted) | 10,455,461 |  |  | 8,545,578 |  |  | 10,257,800 |  |  | 8,532,691 |
Per share: |  |  |  |  |  |  |
Basic | $ | 1.43 |  |  | $ | 0.85 |  |  | $ | 2.57 |  |  | $ | 2.97 |
Diluted | 1.42 |  |  | 0.84 |  |  | 2.56 |  |  | 2.96 |
There were no antidilutive instruments at September 30, 2025 and 2024. Share Repurchase Plans On June 18, 2025, the Corporation announced that the Board of Directors approved a plan to repurchase, in open market transactions at prevailing market prices, up to 314,000 shares, or approximately 3%, of the outstanding shares of ACNB’s common stock. This common stock repurchase program replaced and superseded any and all earlier announced repurchase plans. There were 61,586 shares purchased under this plan during the three months ended September 30, 2025. On October 24, 2022, the Corporation announced that the Board of Directors approved on October 18, 2022, a plan to repurchase, in open market and privately negotiated transactions, up to 255,575, or approximately 3%, of the outstanding shares of the Corporation’s common stock. The plan was replaced by the plan announced on June 18, 2025. There were 215,372 treasury shares purchased under this plan through June 30, 2025.

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