Shareholder Meeting Notice Greene County Bancorp, Inc.’s Annual Meeting of Shareholders will be held on November 1, 2025 at Columbia-Greene Community College, 4400 Route 23, Hudson, New
York 12534, at 10:00 a.m. Eastern Standard Time. Proposals to be voted on at the meeting are listed below along with the Board of Directors’ recommendations.
The Board of Directors recommend a vote FOR all the nominees listed and FOR Proposals 2 and 3, and for the 1 YEAR option in Proposal 4:1. Election of
Directors: 01 - John Brust02 - Donald E. Gibson03 - Tejraj S. Hada2. The ratification of the appointment of Bonadio & Co, LLP as the independent registered public accounting firm for the Company for the fiscal year ending June 30, 2026.3.
To consider and approve a non-binding advisory resolution regarding the compensation of the Company’s named executive officers.4. To consider and act upon an advisory vote on the frequency at which the Company should include an advisory vote
regarding the compensation of the Company’s named executive officers in its proxy statement for shareholder consideration.PLEASE NOTE –YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go online or request a paper copy of
the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you. Here’s how to order a copy of the proxy materials and select delivery preferences:
Current and future delivery requests can be submitted using the options below.If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE
NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials.— Internet – Go to www.envisionreports.com/GCBC. Click Cast Your Vote or Request Materials.— Phone – Call us free of charge at
1-866-641-4276. — Email – Send an email
[email protected] with “Proxy Materials Greene County Bancorp, Inc” in the subject line. Include your fullname and address, plus the number located in the shaded bar on the reverse side,
and state that you want a paper copy of the meeting materials.To facilitate timely delivery, all requests for a paper copy of proxy materials must be received by October 17, 2025.
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