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COMMUNITY FINANCIAL SYSTEM, INC.

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 27, 2026

CBU$64.88-1.4%Stored close · as of Nov 10, 2026

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Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework inInternal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2025.

The consolidated financial statements of the Company have been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm that was engaged to express an opinion as to the fairness of presentation of such financial statements. PricewaterhouseCoopers LLP was also engaged to audit the effectiveness of the Company’s internal control over financial reporting. The report of PricewaterhouseCoopers LLP follows this report.

Community Financial System, Inc.

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By: /s/ Dimitar A. Karaivanov​
Dimitar A. Karaivanov,​
President, Chief Executive Officer and Director​
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By: /s/ Marya Burgio Wlos​
Marya Burgio Wlos,​
Executive Vice President, Treasurer and Chief Financial Officer​
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.