Community Bank System Announces Third Quarter 2023 Earnings Conference Call

Community Bank System, Inc. (NYSE: CBU) invites you to participate in a conference call to discuss the Company’s financial and operating performance during its third quarter ended September 30, 2023.

Event:	Earnings Conference Call – Third Quarter 2023
When:	Tuesday, October 24, 2023 at 11:00 a.m. Eastern Time
How:	By conference call or from a simultaneous web cast
Access:	Conference Call Dial-In:  1-833-630-0464
	1-412-317-1809 – Outside the U.S. & Canada
	Webcast: https://app.webinar.net/VQy6DnZDXEZ

Mark E. Tryniski, President and Chief Executive Officer, and Joseph E. Sutaris, Executive Vice President and Chief Financial Officer, will provide an overview of third quarter 2023 results. They will be joined by Dimitar Karaivanov, Executive Vice President and Chief Operating Officer, for the question-and-answer session. The management presentation is typically approximately 15 minutes, followed by investor questions and discussion.

The company's results for the quarter will be released before the market opens on October 24, 2023 and will also be available in the “Investor Relations” section of the company's website at www.cbna.com.

The call will also be archived on the company's website for one year and can be accessed at any time and at no cost during this period.

About Community Bank System, Inc.

Community Bank System, Inc. is a diversified financial services company focused on four main business lines – banking, benefits administration, insurance services and wealth management with total assets of $15.1 billion. Its banking subsidiary, Community Bank, N.A., is among the country’s 100 largest banking institutions and operates more than 200 customer facilities across Upstate New York, Northeastern Pennsylvania, Vermont, and Western Massachusetts. In addition to a full range of retail, business, and municipal banking services, the Company offers comprehensive financial planning, trust administration and wealth management services through its Community Bank Wealth Management operating unit. 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 100 U.S. insurance agency. Community Bank System, Inc. is listed on the New York Stock Exchange and the Company’s stock trades under the symbol CBU. For more information about Community Bank visit www.cbna.com or https://ir.communitybanksystem.com.

For further information contact:Joseph Sutaris,E.V.P. and Chief Financial Officer(315) 445-7396