Transaction Details

Footnotes

Includes 2,423.134 shares acquired pursuant to the Community Financial System, Inc. Dividend Reinvestment Plan. | Includes 275.879 shares acquired pursuant to the Community Financial System, Inc. Dividend Reinvestment Plan. | Includes 188.405 shares acquired pursuant to the Community Financial System, Inc. Dividend Reinvestment Plan. | The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the "LTIP"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date. | Includes 19.1578, 21.1856, and 19.4356 units of phantom stock acquired on July 10, 2025, October 10, 2025, and January 12, 2026 under the LTIP's dividend reinvestment feature.