CHEMUNG FINANCIAL CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. ____)

Filed by the Registrant

Filed by a Party other than the Registrant

Check the appropriate box:

One Chemung Canal Plaza

Elmira, New York 14901

April 23, 2026

Dear Fellow Shareholder:

You are cordially invited to attend the Annual Meeting of Shareholders of Chemung Financial Corporation on Tuesday, June 2, 2026, at 2:00 p.m., Eastern Time. The Annual Meeting will be held in a virtual format accessible at https://edge.media-server.com/mmc/p/az7fbtio (Password: chemung2026)

The Annual Meeting will be held to review the matters to be voted upon by the shareholders as described in the accompanying Notice of Annual Meeting of Shareholders and related Proxy Statement.

Your vote is important. We want to be sure that your shares are represented and that your vote is properly accounted for and, whether or not you plan to attend the Annual Meeting, we request that you vote your shares. You may vote your shares by telephone, by the Internet or by returning a requested proxy card, as further explained in the Proxy Statement. Please see the attached Notice of Annual Meeting of Shareholders and accompanying Proxy Statement for additional information regarding how to vote your shares.

We encourage you to review the following Proxy Statement for a better understanding of the Corporation, its compensation practices and corporate governance structure, as well as a summary of the matters that will be voted on this year. We have attempted to present the information contained in the Proxy Statement in a straightforward and easily understood manner. However, much of the information presented is required by law to be included in a certain format. We appreciate your taking the time to read our Proxy Statement and hope that we have addressed the issues that interest you, our shareholders. Thank you for your support and investment in Chemung Financial Corporation.

Sincerely,

Anders M. Tomson

President & Chief Executive Officer

Notice of Annual Meeting of Shareholders

Date June 2, 2026

Time 2:00 PM

Location https://edge.media-server.com/mmc/p/az7fbtio (Password: chemung2026)and enter the control

number and password included in your Notice of Internet Availability of Proxy Materials, voting instruction

form or proxy card. Online access to the Annual Meeting will be open approximately 15 minutes prior to

the start of the Annual Meeting.

Record Date April 6, 2026

We have elected to take advantage of Securities and Exchange Commission (“SEC”) rules that allow us to furnish proxy materials to certain shareholders over the Internet. We believe furnishing proxy materials to our shareholders over the Internet allows us to provide shareholders with the information they need, while lowering the costs of delivery and reducing the environmental impact of the Annual Meeting. If you have received the Notice of Internet Availability, you will not receive a printed copy of the proxy materials unless you request it by following the instructions for requesting such proxy materials contained in the Notice of Internet Availability and summarized in the proxy statement.

If you were a shareholder of record as of the close of business on April 6, 2026 i.e., you held your shares in your own name as reflected in the records of our transfer agent, Equiniti Trust Company, LLC ("ETC"), formally known as American Stock Transfer & Trust Company, you can attend the annual meeting by accessing https://edge.media-server.com/mmc/p/az7fbtioand selecting the button “I have a Control Number.” You will then be directed to a screen where you will enter: (1) the 11-digit control number on the proxy card; and (2) the meeting password chemung2026. Please note, the meeting password is case sensitive. Once you have completed these steps, select the “login” button, which will take you to the annual meeting page (the “Meeting Page”) where you can vote, submit written questions and listen to the meeting. If you are a shareholder of record and misplaced your 11-digit control number, please call ETC at (800) 937-5449. If you were a beneficial owner as of the close of business on April 6, 2026 (i.e., you held your shares in “street name” through an intermediary, such as a bank, broker or other nominee), you must register in advance to attend the Annual Meeting. To register, please obtain a legal proxy from the bank, broker or other nominee that is the record holder of your shares and then submit the legal proxy, along with your name and email address, to ETC to receive an 11-digit control number that may be used to access the Annual Meeting site provided above. Any control number that was provided with your proxy materials, likely a 16-digit number, will not provide access to the Annual Meeting site. Requests for registration and submission of legal proxies should be labeled as “Legal Proxy” and must be received by ETC no later than 5 p.m., EST, on May 28, 2026. All such requests should be submitted (1) by email to proxy@equiniti.com, (2) by facsimile to (718) 765-8730, or (3) by mail to Equiniti Trust Company, LLC, Attn: Proxy Tabulation Department, 1110 Centre Pointe Curve, Suite 101, Mendota Heights, MN 55120. Obtaining a legal proxy may take several days and shareholders are advised to register as far in advance as possible. Once you have obtained your 11-digit control number from ETC, please follow the steps set forth above for “Record Holders” to attend the Annual Meeting.

Whether or not you plan to attend the Annual Meeting virtually, you are encouraged to vote in advance of the Annual Meeting. Registered shareholders can vote shares online, by telephone or by regular mail in advance of the Annual Meeting. To access your proxy materials and vote online, please visit www.voteproxy.com and follow the instructions. If you wish to vote by telephone, please call 1-800-PROXIES (1-800-776-9437) in the United States or 1-201-299-4446 from foreign countries using a touch-tone phone and follow the prompted instructions. You may also vote by mail by requesting a paper proxy card. Shareholders who hold their shares through an intermediary, such as a bank or broker, should follow voting instructions provided by the intermediary.

Please ensure that your shares are represented at the 2026 Annual Meeting, as your vote is very important.

By Order of the Board of Directors

Important Notice Regarding the Availability of Proxy Materials for the

2026 Annual Meeting of Shareholders to be Held on June 2, 2026:

The Corporation's Proxy Statement and 2025 Annual Report on Form 10-K, which includes an abbreviated report for the twelve-month period, are available at

http://astproxyportal.com/ast/01079