GCBC

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

FOR RELEASE

Date: October 22, 2026

For Further Information Contact:

Donald E. Gibson

President & CEO

(518) 943-2600

donaldg@bankofgreene.com

Nick Barzee

SVP & CFO

(518) 943-2600

nickb@bankofgreene.com

Greene County Bancorp, Inc. Reports Record High Net Income of $12.5 Million for the Quarter Ended

September 30, 2026, an Increase of 41% when Compared to the Quarter Ended September 30, 2025

Catskill, N.Y. – October 22, 2026 - Greene County Bancorp, Inc. (the “Company”) (NASDAQ: GCBC), the holding company for Bank of Greene (formerly the Bank of Greene County) and its subsidiary Greene County Commercial Bank, today reported net income for the three months ended September 30, 2026, which is the first quarter of the Company’s fiscal year ending June 30, 2027. Net income for the three months ended September 30, 2026 was $12.5 million, or $0.73 per basic and diluted share, as compared to $8.9 million, or $0.52 per basic and diluted share, for the three months ended September 30, 2025. Net income increased $3.6 million, or 40.9%, when comparing the three months ended September 30, 2026 and 2025.

Highlights:

•

Net Income: $12.5 million for the three months ended September 30, 2026, a new record high

•

Total Assets: $3.2 billion at September 30, 2026, a new record high

•

Net Loans: $1.8 billion at September 30, 2026, a new record high

•

Total Deposits: $2.8 billion at September 30, 2026, a new record high

•

Return on Average Assets: 1.61% for the three months ended September 30, 2026

•

Return on Average Equity: 17.73% for the three months ended September 30, 2026

“This quarter marked an important milestone as we introduced the Bank of Greene name and delivered record quarterly earnings,” said Donald Gibson, President & CEO. “Our new name reflects the broader region we serve and the relationships we continue to build across the Hudson Valley and Capital Region. Our commitment remains rooted in responsive personal service and local decision making. We are proud of our employees and remain focused on growing responsibly, supporting our customers, and delivering long-term shareholder value.”

Effective September 14, 2026, the Company’s primary banking subsidiary changed its legal name from the Bank of Greene County to Bank of Greene. The name change has no impact on the Bank’s operations and has no impact on the Company’s consolidated financial statements.

At the Company’s Annual Meeting on November 7, 2026, shareholders will consider a related proposal to amend the Company’s charter to change its legal name from Greene County Bancorp, Inc. to Greene Bancorp, Inc. If approved, the name change is expected to become effective following certification of the shareholder vote on November 9, 2026. The Company’s Nasdaq trading symbol “GCBC” and CUSIP number are not expected to change.

Total consolidated assets for the Company were $3.2 billion at September 30, 2026, primarily consisting of $1.8 billion of net loans and $1.2 billion of total securities available-for-sale and held-to-maturity. Consolidated deposits totaled $2.8 billion at September 30, 2026, consisting of retail, business, municipal and private banking relationships.

Pre-provision net income was $12.1 million for the three months ended September 30, 2026 as compared to $10.1 million for the three months ended September 30, 2025, an increase of $1.9 million, or 19.2%. Pre-provision net income measures the Company’s net income not including 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 continues to manage its balance sheet with a focus on higher-yielding loans and securities, and disciplined deposit pricing. Deposit rates are actively managed in response to market interest rates and competitive conditions. These efforts contributed to a higher net interest margin for the three months ended September 30, 2026, compared with the same period in 2025.

Uncertainty surrounding inflation, the direction of interest rates, and geopolitical developments continues to influence the economic outlook. The Company remains focused on prudent risk management, maintaining financial strength and pursuing profitable growth, while delivering long-term shareholder value and serving the financial needs of its communities.

Selected highlights for the three months ended September 30, 2026, are as follows:

Net Interest Income and Margin

•

Net interest income increased $4.4 million to $21.9 million for the three months ended September 30, 2026, from $17.5 million for the three months ended September 30, 2025. The increase in net interest income was primarily due to an increase in the average

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

FOR RELEASE

Date: July 23, 2026

For Further Information Contact:

Donald E. Gibson

President & CEO

(518) 943-2600

donaldg@tbogc.com

Nick Barzee

SVP & CFO

(518) 943-2600

nickb@tbogc.com

Greene County Bancorp, Inc. Reports Record Fiscal Year 2026 Earnings, Achieves

Highest Quarterly Net Income in Company History, and Earns National Top-Performing Bank Recognition

Catskill, N.Y. – July 23, 2026 - Greene County Bancorp, Inc. (the “Company”) (NASDAQ: GCBC), the holding company for the Bank of Greene County and its subsidiary Greene County Commercial Bank, today reported net income for the quarter and fiscal year ended June 30, 2026. Net income for the quarter and fiscal year ended June 30, 2026 was $11.3 million, or $0.67 per basic and diluted share, and $41.0 million, or $2.41 per basic and diluted share, respectively, as compared to $9.3 million, or $0.55 per basic and diluted share, and $31.1 million, or $1.83 per basic and diluted share, for the quarter and fiscal year ended June 30, 2025, respectively. Net income increased $9.9 million, or 31.7%, when comparing the fiscal years ended June 30, 2026 and 2025.

Highlights:

•

Net Income: $41.0 million for the fiscal year ended June 30, 2026, a new record high

•

Total Assets: $3.2 billion at June 30, 2026, a new record high

•

Net Loans: $1.7 billion at June 30, 2026, a new record high

•

Total Deposits: $2.7 billion at June 30, 2026

•

Return on Average Assets: 1.35% for the fiscal year ended June 30, 2026

•

Return on Average Equity: 15.91% for the fiscal year ended June 30, 2026

Donald Gibson, President & CEO stated: “Fiscal 2026 was a truly exceptional year for Greene County Bancorp, Inc. We achieved record net income of $41.0 million, record quarterly earnings of $11.3 million, and reached all-time highs in both assets and net loans. These accomplishments reflect the strength of our relationship-based community banking model, the loyalty of our customers, and the dedication of our employees throughout the organization.

We are especially honored to be recognized by Bank Director Magazine’s RankingBanking report as one of the nation’s top-performing banks under $5.0 billion in assets. This recognition is particularly meaningful because it is based on key measures of profitability, asset quality, and capital strength-areas that have long been central to our operating philosophy.

As we look ahead, we remain committed to serving the individuals, businesses, municipalities, and communities that have contributed to our success. Our consistent performance, strong balance sheet, and disciplined growth strategy position us well to continue creating long-term value for our customers, shareholders, employees, and communities.”

Total consolidated assets for the Company were $3.2 billion at June 30, 2026, primarily consisting of $1.7 billion of net loans and $1.2 billion of total securities available-for-sale and held-to-maturity. Consolidated deposits totaled $2.7 billion at June 30, 2026, consisting of retail, business, municipal and private banking relationships.

Pre-provision net income was $43.1 million for the year ended June 30, 2026 as compared to $32.5 million for the year ended June 30, 2025, an increase of $10.6 million, or 32.7%. Pre-provision net income measures the Company’s net income not including 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 manages its balance sheet by focusing on higher-yielding loans and securities, and lowering deposit rates to align with the Federal Reserve’s interest rate cuts. This resulted in a higher net interest margin for the year ended June 30, 2026 as compared to the year ended June 30, 2025. Continued geopolitical disruptions, higher energy prices and shifting tariff policies complicate the economic outlook. With shifting global alliances and market volatility, our focus remains our commitment to building shareholder value while serving the financial needs of our communities. The Company continues to deliver strong performance and stability against an unpredictable geopolitical landscape.

Selected highlights for the quarter and fiscal year ended June 30, 2026, are as follows:

Net Interest Income and Margin

•

Net interest income increased $4.4 million to $21.1 million for the three months ended June 30, 2026, from $16.7 million for the three months ended June 30, 2025. Net interest income increased $17.8 million to $77.9 million for the year ended June 30, 2026, from $60.1 million for the year ended June 30, 2025. The increase in net interest income was due to an increase in the average balance of interest-earning ass

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

FOR RELEASE

Date: April 22, 2026

For Further Information Contact:

Donald E. Gibson

President & CEO

(518) 943-2600

donaldg@tbogc.com

Nick Barzee

SVP & CFO

(518) 943-2600

nickb@tbogc.com

Greene County Bancorp, Inc. Delivers Net Income of $10.5 Million for the Quarter Ended

March 31, 2026, the Highest Quarterly Earnings in the Bank’s 137-Year History and

Announces a Stock Repurchase Program

Catskill, N.Y. – April 22, 2026 - Greene County Bancorp, Inc. (the “Company”) (NASDAQ: GCBC), the holding company for the Bank of Greene County and its subsidiary Greene County Commercial Bank, today reported net income for the three and nine months ended March 31, 2026, which is the third quarter of the Company’s fiscal year ending June 30, 2026. Net income for the three and nine months ended March 31, 2026 was $10.5 million, or $0.62 per basic and diluted share, and $29.7 million, or $1.74 per basic and diluted share, respectively, as compared to $8.1 million, or $0.47 per basic and diluted share, and $21.8 million, or $1.28 per basic and diluted share, for the three and nine months ended March 31, 2025, respectively. Net income increased $7.9 million, or 36.1%, when comparing the nine months ended March 31, 2026 and 2025.

Highlights:

•

Net Income: $29.7 million for the nine months ended March 31, 2026, a new record high

•

Total Assets: $3.2 billion at March 31, 2026, a new record high

•

Net Loans: $1.7 billion at March 31, 2026, a new record high

•

Total Deposits: $2.8 billion at March 31, 2026, a new record high

•

Return on Average Assets: 1.31% for the nine months ended March 31, 2026

•

Return on Average Equity: 15.65% for the nine months ended March 31, 2026

•

Company adopts a stock repurchase program of 400,000 shares

Donald Gibson, President & CEO stated: “We are proud to report another quarter of record performance, with all-time highs in net income, total assets, net loans and total deposits. These results are not achieved in isolation, they reflect the trust our customers place in us and the dedication of our team.

At our core, we remain a community bank. Every loan we make, every dollar we gather, and every relationship we build is rooted in the communities we serve. We are grateful to our customers, our communities, and employees for their continued support and commitment.

Our success is not defined by a single quarter, but by consistent performance over time. That consistency is driven by our people, our employee-owners and positions us to deliver long-term value for our shareholders while remaining true to our mission as a relationship-focused community bank.”

Total consolidated assets for the Company were $3.2 billion at March 31, 2026, primarily consisting of $1.7 billion of net loans and $1.2 billion of total securities available-for-sale and held-to-maturity. Consolidated deposits totaled $2.8 billion at March 31, 2026, consisting of retail, business, municipal and private banking relationships.

Pre-provision net income was $31.6 million for the nine months ended March 31, 2026 as compared to $24.0 million for the nine months ended March 31, 2025, an increase of $7.6 million, or 31.6%. Pre-provision net income measures the Company’s net income not including 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 three and nine months ended March 31, 2026 as compared to the three and nine months ended March 31, 2025. The recent global conflicts, higher energy prices and shifting tariff policies have complicated the economic outlook. With shifting global alliances and market volatility our focus remains our commitment to building shareholder value while serving the financial needs of our communities. The Company continues to deliver strong performance and stability against an unpredictable geopolitical landscape.

Selected highlights for the three and nine months ended March 31, 2026, are as follows:

Net Interest Income and Margin

•

Net interest income increased

$4.0 million to $20.2 million for the three months ended March 31, 2026, from $16.2 million for the three months ended March 31, 2025. Net interest income increased $13.4 million to $56.8 million for the nine months ended March 31, 2026, from $43.4 million for the nine months ended March 31, 2025. The increase in net interest income was due to an increase in the average balance of interest-earning assets, which increased $164