144 0001486056 XXXXXXXX LIVE 0000723188 COMMUNITY BANK SYSTEM, INC. 001-13695 5790 WIDEWATERS PARKWAY DEWITT NY 13214 315-445-3151 MARK BOLUS BOARD OF DIRECTOR COMMON APEX CLEARING

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4092 286686.00 53330000 11/06/2024 NYSE Common 11/06/2023 STOCK OPTION EXERCISE COMMUNITY BANK SYSTEMS N 4092 11/06/2024 N/A Y 11/06/2024 /s/ Mark Bolus