Community Bank System, Inc. has adopted an Executive Severance Plan providing severance benefits for certain executive officers upon termination under various circumstances. The plan aims to retain executives and ensure their continued dedication particularly in the event of a Change in Control. Maureen Gillan-Myer, Jeffrey M. Levy, and as of January 1, 2024, Joseph E. Sutaris, are participating in the plan. The severance benefits vary based on the nature of termination and the executive's management level.