On December 20, 2023, Community Bank System, Inc.?s Board of Directors elected Dimitar Karaivanov, the Company?s Executive Vice President and Chief Operating Officer (?COO?), to serve as a Director of the Company and its wholly-owned subsidiary, Community Bank, N.A. (the ?Bank?), effective as of January 1, 2024. Mr. Karaivanov?s election to the Board is part of the previously announced succession plan in which Mr. Karaivanov will assume the role of President and Chief Executive Officer of the Company and the Bank effective as of January 1, 2024. Mr. Karaivanov will serve on the Company?s and the Bank?s Risk Committee.

There are no arrangements or understandings between Mr. Karaivanov and any other persons pursuant to which he was elected as a Director of the Company and the Bank.