COMMUNITY FINANCIAL SYSTEM, INC. Earnings Per Share Disclosure

NOTE M: EARNINGS PER SHARE

The two class method is used in the calculations of basic and diluted earnings per share. Under the two class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared and participation rights in undistributed earnings. The Company has determined that all of its outstanding non-vested stock awards are participating securities as of December 31, 2025.

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Basic earnings per share are computed based on the weighted-average of the common shares outstanding for the period. Diluted earnings per share are based on the weighted-average of the shares outstanding and the assumed exercise of stock options during the year. The dilutive effect of options is calculated using the treasury stock method of accounting. The treasury stock method determines the number of common shares that would be outstanding if all the dilutive options were exercised and the proceeds were used to repurchase common shares in the open market at the average market price for the applicable time period. At December 31, 2025, 2024 and 2023 weighted-average anti-dilutive stock options outstanding were immaterial, which were not included in the computation below.

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The following is a reconciliation of basic to diluted earnings per share for the years ended December 31, 2025, 2024 and 2023.

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Stock Repurchase Program

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At its December 2025 meeting, the Board of Directors of the Company (the “Board”) approved a new stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,633,000 shares of the Company’s common stock, in accordance with securities and banking laws and regulations, during the twelve-month period starting January 1, 2026. Any repurchased shares will be used for general corporate purposes, including those related to stock plan activities. The timing and extent of repurchases will depend on market conditions and other corporate considerations as determined at the Company’s discretion.

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At its December 2024 meeting, the Board approved a stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,628,000 shares of the Company’s common stock, in accordance with securities and banking laws and regulations, during the twelve-month period starting January 1, 2025. There were 206,054 shares of treasury stock purchases made under this authorization during 2025, with an average price paid per share of $53.34.

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At its December 2023 meeting, the Board approved a stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,697,000 shares of the Company’s common stock, in accordance with securities and banking laws and regulations, during the twelve-month period starting January 1, 2024. There were 1,000,000 shares of treasury stock purchases made under this authorization during 2024 with an average price paid per share of $45.84.

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At its December 2022 meeting, the Board approved a stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,697,000 shares of the Company’s common stock, in accordance with securities and banking laws and regulations, during the twelve-month period starting January 1, 2023. There were 607,161 shares of treasury stock purchases made under this authorization during 2023 with an average price paid per share of $49.44.