Community Bank System, Inc. Changes Corporate Name to Community Financial System, Inc.

Community Bank System, Inc. (NYSE: CBU) (the “Company”), a diversified financial services holding company operating four complementary business units: Community Bank N.A., Benefit Plan Administrative Services, Inc. (“BPAS”), OneGroup NY, Inc. (“OneGroup”), and Wealth Management, announced that it has changed its corporate name to “Community Financial System, Inc.” (“Community Financial System”) effective as of today. The name change reflects the Company’s broader business model and mission in contributing to the prosperity of its community, including its clients, colleagues and shareholders by providing comprehensive financial services across its four main business lines.

The Company’s ticker symbol will not change and its common stock will start trading on the New York Stock Exchange as Community Financial System, Inc. on May 24, 2024.

“The new name – Community Financial System – allows us to emphasize the evolution of our capabilities, solutions and focus,” said Dimitar A. Karaivanov, President and CEO of the Company. “We have diligently diversified, invested in and nurtured our four key businesses and today offer a comprehensive set of banking, benefits administration, insurance and wealth management services both locally and on a nationwide basis.

"Our banking business, Community Bank, N.A., is consistently ranked as one of the top banks in the U.S. by Forbes; our employee benefit services business, BPAS, was recently named Top 5 Recordkeeper across all market segments by the National Association of Plan Advisors (NAPA) Advisors’ Choice Awards; our insurance services business, OneGroup, was ranked #75 amongst the Top 100 Property/Casualty Agencies by the Insurance Journal, and our wealth management services business has full service capabilities and advises on more than $12 billion of assets.

"In aggregate, over 39% of our revenue is comprised of diversified fee income businesses, well over twice that of industry peers. Bringing all of that under the new name, Community Financial System, underscores our mission and drives our inclusiveness as one company.”

About Community Financial System, Inc.

Community Financial System, Inc. is a diversified financial services company that is focused on four main business lines – banking, employee benefit services, insurance services and wealth management. Its banking subsidiary, Community Bank, N.A., is among the country’s 100 largest banking institutions with over $15 billion in assets and operates approximately 200 customer facilities across Upstate New York, Northeastern Pennsylvania, Vermont, and Western Massachusetts. The Company’s Benefit Plans Administrative Services, Inc. subsidiary is a leading provider of employee benefits administration, trust services, collective investment fund administration, and actuarial consulting services to customers on a national scale. The Company’s OneGroup NY, Inc. subsidiary is a top 75 U.S. insurance agency. The Company also offers comprehensive financial planning, trust administration and wealth management services through its Wealth Management operating unit. The Company is listed on the New York Stock Exchange and the Company’s stock trades under the symbol CBU. Effective May 24, 2024, the Company will trade under the name Community Financial System, Inc. For more information about the Company visit www.cbna.com or www.communityfinancialsystem.com.