Exhibit 99.1

FOR RELEASE

Date: July 23, 2025

For Further Information Contact:

Donald E. Gibson

President & CEO

(518) 943-2600

Nick Barzee

SVP & CFO

(518) 943-2600

Greene County Bancorp, Inc. Reports Record High Net Income of $31.1 Million for the Fiscal Year Ended

June 30, 2025, Announces Plans to Expand into Saratoga County

Donald Gibson, President & CEO stated: “I am pleased to report record high net income for the fiscal year ended June 30, 2025, marking 16 years of the past 17 years that our Company has achieved record earnings. This sustained performance is a testament to our disciplined business model, strong community partnerships and exceptional execution of our team. As we look ahead, we are excited to announce plans to expand into Saratoga County with our first branch in that market area, expanding our geographic footprint from five to six counties within New York State, and further strengthening our position as the leading economic engine of the communities we serve. Additionally, we are honored to be recognized by the Albany Business Review, first as one of the Capital Regions 11 fastest growing large companies, defined as those with revenue exceeding $100.0 million, and second, on July 17, 2025, we ranked as the number one commercial mortgage lender in New York’s Capital Region for commercial loan volume in 2024. I believe the distinction reflects our financial strength and our long-term commitment to organic growth that benefits customers, communities and shareholders alike.”

Total consolidated assets for the Company were $3.0 billion at June 30, 2025, primarily consisting of $1.6 billion of net loans and $1.1 billion of total securities available-for-sale and held-to-maturity. Consolidated deposits totaled $2.6 billion at June 30, 2025, consisting of retail, business, municipal and private banking relationships.

Pre-provision net income was $32.5 million for the year ended June 30, 2025 as compared to $25.5 million for the year ended June 30, 2024, an increase of $7.0 million, or 27.1%. Pre-provision net income measures the Company’s net income less the provision for credit losses. Management believes that this non-GAAP measure assists investors in comprehending the impact of the provision for credit losses on the Company’s reported results, offering an alternative view of the Company’s performance and the Company’s ability to generate income in excess of its provision for credit losses.  The Company strategically managed its balance sheet by focusing on higher-yielding loans and securities, and lowering deposit rates to align with the Federal Reserve’s recent interest rate cuts. This resulted in a higher net interest margin for the year ended June 30, 2025 as compared to the year ended June 30, 2024. The Company will continue to monitor the Federal Reserve and interest rates paid on deposits, while maintaining our long-term customer relationships.

Selected highlights for the quarter and fiscal year ended June 30, 2025 are as follows:

Average loan balances increased $145.9 million and $96.6 million and the yield on loans increased 18 basis points and 23 basis points when comparing the three months and years ended June 30, 2025 and 2024, respectively. The average balance of securities increased $87.0 million and $79.1 million and the yield on such securities increased 24 basis points and 36 basis points when comparing the three months and years ended June 30, 2025 and 2024, respectively. Average interest-bearing bank balances and federal funds decreased $13.8 million and $5.0 million and the yield on interest-bearing bank balances and federal funds decreased 172 basis points and 36 basis points when comparing the three months and years ended June 30, 2025 and 2024, respectively.

The cost of NOW deposits decreased 34 basis points and 2 basis points, the cost of certificates of deposit decreased 81 basis points and 21 basis points, and the cost of savings and money market deposits decreased 1 basis point and increased 7 basis points when comparing the three months and years ended June 30, 2025 and 2024, respectively. The growth in interest-bearing liabilities was primarily due to an increase in average NOW deposits of $178.0 million and $135.1 million and an increase in average certificates of deposits of $75.0 million and $62.7 million when comparing the three months and years ended June 30, 2025 and 2024, respectively.  This was partially offset by a decrease in average savings and money market deposits of $15.0 million and $22.8 million when comparing the three months and years ended June 30, 2025 and 2024, respectively. Yields on interest-earning assets increased when comparing the three months and years ended June 30, 2025 and 2024 as the Company continued to reprice assets into the higher interest rate environment.  During the year ended June 30, 2025, the Company implemented a strategic reduction in deposit rates that aligns with the Federal Reserve’s rate cuts, while providing competitive financial solutions to the Company’s customers that reflect the prevailing economic conditions, while growing new relationships.

•

Noninterest income increased $46,000, or 1.2%, to $3.8 million for the three months ended June 30, 2025 compared to $3.7 million for the three months ended June 30, 2024. The increase during the three months ended June 30, 2025 was primarily due to a $128,000 increase in fee income earned on customer interest rate swap contracts. This was partially offset by a $152,000 decrease of investment services income.  Noninterest income increased $1.3 million, or 9.5%, to $15.2 million for the year ended June 30, 2025 compared to $13.9 million for the year ended June 30, 2024. The increase during the year ended June 30, 2025 was primarily due to a $610,000 Employee Retention Tax Credit, an increase in fee income earned on customer interest rate swap contracts of $528,000, loan fees of $242,000, service charge account fees of $235,000, and income from bank owned life insurance of $363,000. This was partially offset by a $665,000 loss on sales of securities available-for-sale.

Greene County Bancorp, Inc. is the holding company for the Bank of Greene County, and its subsidiary Greene County Commercial Bank. The Company is the leading provider of community-based banking services throughout the Hudson Valley and Capital Region of New York State. Its customers include individuals, businesses, municipalities and other institutions. Greene County Bancorp, Inc. (GCBC) is publicly traded on the Nasdaq Capital Market and is dedicated to promoting economic development and a high quality of life in the communities it serves. For more information on Greene County Bancorp, Inc., visit www.tbogc.com.

This earnings release contains statements about future events that constitute forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995.  Forward-looking statements may be identified by references to a future period or periods or by the use of the words “believe,” “expect,” “anticipate,” “intend,” “estimate,” “assume,” “will,” “should,” “could,” “plan,” and other similar terms of expressions.  Forward-looking statements should not be relied on because they involve known and unknown risks, uncertainties and other factors, many of which are beyond the Company’s control. These risks, uncertainties and other factors may cause the actual results, performance or achievements expressed in, or implied by, the forward-looking statements to differ materially from those contemplated by the forward-looking statements.  Factors that may cause such a difference include, but are not limited to, local, regional, national and international general economic conditions, including actual or potential stress in the banking industry, financial and regulatory changes, changes in interest rates, regulatory considerations, competition, technological developments, retention and recruitment of qualified personnel, changes in customer deposit behavior, and market acceptance of the Company’s pricing, products and services.

The Company cautions readers not to place undue reliance on any forward-looking statements, which speak only as of the date made, and advises readers that various factors, including, but not limited to, those described above and other factors discussed in the Company’s annual and quarterly reports previously filed with the Securities and Exchange Commission, could affect the Company’s financial performance and could cause the Company’s actual results or circumstances for future periods to differ materially from those anticipated or projected.

Unless required by law, the Company does not undertake, and specifically disclaims any obligations to, publicly release any revisions that may be made to any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements.

For more information, please see our reports filed with the United States Securities and Exchange Commission (“SEC”), including our most recent annual report on Form 10-K and quarterly reports on Form 10-Q.

In addition to presenting information in conformity with accounting principles generally accepted in the United States of America (GAAP), this news release contains financial information determined by methods other than GAAP (non-GAAP). The following measures used in this release, which are commonly utilized by financial institutions, have not been specifically exempted by the Securities and Exchange Commission ("SEC") and may constitute "non-GAAP financial measures" within the meaning of the SEC's rules.

The Company has provided in this news release supplemental disclosures for the calculation of net interest margin utilizing a fully taxable-equivalent adjustment and pre-provision net income. Management believes that the non-GAAP financial measures disclosed by the Company from time to time are useful in evaluating the Company's performance and that such information should be considered as supplemental in nature and not as a substitute for or superior to the related financial information prepared in accordance with GAAP.  Our non-GAAP financial measures may differ from similar measures presented by other companies. Refer to the tables on page 9 for Non-GAAP to GAAP reconciliations.

 (END)

Greene County Bancorp, Inc.

Consolidated Statements of Income, and Selected Financial Ratios (Unaudited)

		At or for the Three Months							At or for the Years
		Ended June 30,							Ended June 30,
Dollars in thousands, except share and per share data		2025				2024				2025				2024
Interest income		$	30,739			$	27,328			$	117,705			$	103,664
Interest expense			14,033				14,471				57,584				52,685
Net interest income			16,706				12,857				60,121				50,979
Provision for credit losses			(880	)			(151	)			1,316				766
Noninterest income			3,765				3,719				15,233				13,908
Noninterest expense			10,394				9,897				39,372				37,302
Income before taxes			10,957				6,830				34,666				26,819
Tax provision			1,624				98				3,528				2,050
Net income		$	9,333			$	6,732			$	31,138			$	24,769
Basic and diluted EPS		$	0.55			$	0.40			$	1.83			$	1.45
Weighted average shares outstanding			17,026,828				17,026,828				17,026,828				17,026,828
Dividends declared per share (4)		$	0.09			$	0.08			$	0.36			$	0.32
Selected Financial Ratios
Return on average assets(1)			1.28	%			1.00	%			1.10	%			0.93	%
Return on average equity(1)			15.98	%			13.36	%			14.08	%			12.87	%
Net interest rate spread(1)			2.14	%			1.72	%			1.97	%			1.75	%
Net interest margin(1)			2.37	%			1.97	%			2.19	%			1.98	%
Fully taxable-equivalent net interest margin(2)			2.67	%			2.24	%			2.47	%			2.25	%
Efficiency ratio(3)			50.77	%			59.71	%			52.25	%			57.49	%
Non-performing assets to total assets											0.10	%			0.13	%
Non-performing loans to net loans											0.19	%			0.25	%
Allowance for credit losses on loans to non-performing loans											658.37	%			516.20	%
Allowance for credit losses on loans to total loans											1.24	%			1.28	%
Shareholders’ equity to total assets											7.85	%			7.29	%
Dividend payout ratio(4)											19.67	%			22.07	%
Actual dividends paid to net income(5)											14.37	%			13.08	%
Book value per share										$	14.03			$	12.10

⁽¹⁾ Ratios are annualized when necessary.

⁽²⁾ Interest income calculated on a taxable-equivalent basis (non-GAAP) includes the additional interest income that would have been earned if the Company’s investment in tax-exempt securities and loans had been subject to federal and New York State income taxes yielding the same after-tax income.

⁽³⁾ The efficiency ratio has been calculated as noninterest expense divided by the sum of net interest income and noninterest income.

⁽⁴⁾ The dividend payout ratio has been calculated based on the dividends declared per share divided by basic earnings per share.  No adjustments have been made to account for dividends waived by Greene County Bancorp, MHC (“MHC”), the Company’s majority shareholder, owning 54.1% of the shares outstanding.

Greene County Bancorp, Inc.

Consolidated Statements of Financial Condition (Unaudited)

The above information is preliminary and based on the Company’s data available at the time of presentation.

The following table summarizes the adjustments made to arrive at the fully taxable-equivalent net interest margins.

 ⁽¹⁾ Interest income calculated on a taxable-equivalent basis (non-GAAP) includes the additional interest income that would have been earned if the Company’s investment in tax-exempt securities and loans had been subject to federal and New York State income taxes yielding the same after-tax income. The rate used for this adjustment was 21% for federal income taxes for the three and twelve months ended June 30, 2025 and 2024, 4.44% for New York State income taxes for the three and twelve months ended June 30, 2025 and 2024.

The following table summarizes the adjustments made to arrive at pre-provision net income.

The above information is preliminary and based on the Company’s data available at the time of presentation.

---