Material Event (Form 8-K)

On March 19, 2026, Greene County Bancorp, MHC (the "MHC"), the mutual holding company and the 54.1% majority owner of Greene County Bancorp, Inc. (the "Company"), received the nonobjection of the Federal Reserve Bank of Philadelphia to waive its right to receive dividends, aggregating up to $0.64 per share, paid by the Company during the four quarters ending with the quarters that end on March 31, 2026, June 30, 2026, September 30, 2026, and December 31, 2026.

As has been previously disclosed, subject to cash flow needs, it is the MHC's intention to waive the dividends declared and paid by the Company on its common stock during these quarters.

Certain statements herein constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements may be identified by words such as "believes," "will," "expects," "project," "may," "could," "developments," "strategic," "launching," "opportunities," "anticipates," "estimates," "intends," "plans," "targets" and similar expressions. These statements are based upon the current beliefs and expectations of the Company's management and are subject to significant risks and uncertainties. Actual results may differ materially from those set forth in the forward-looking statements as a result of numerous factors. Factors that could cause such differences to exist include, but are not limited to, general economic conditions, changes in interest rates, regulatory considerations, and competition. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this Current Report on Form 8-K.