Exhibit 99.1 FOR RELEASE Date: July 23, 2025 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 High Net Income of $31.1 Million for the Fiscal Year Ended June 30, 2025, Announces Plans to Expand into Saratoga County Catskill, N.Y. – July 23, 2025 - Greene County Bancorp, Inc. (the "Company") (NASDAQ: GCBC), the holding company for the Bank of Greene County and its ...

Core Insights - Greene County Bancorp, Inc. reported record high net income of $31.1 million for the fiscal year ended June 30, 2025, representing a 25.7% increase from $24.8 million in the previous year [1][3] - The company plans to expand into Saratoga County, increasing its geographic footprint from five to six counties in New York State [3] - Total consolidated assets reached $3.0 billion at June 30, 2025, up from $2.8 billion a year earlier, marking a 7.6% increase [19] Financial Performance - Net income for the quarter ended June 30, 2025, was $9.3 million, compared to $6.7 million for the same quarter in 2024, a 38.6% increase [1][6] - Pre-provision net income for the year ended June 30, 2025, was $32.5 million, up 27.1% from $25.5 million in 2024 [4] - Net interest income increased to $60.1 million for the year ended June 30, 2025, from $51.0 million in 2024, a rise of 17.8% [5][24] Asset and Loan Growth - Total loans receivable increased by $127.0 million, or 8.6%, to $1.6 billion at June 30, 2025 [19] - The average balance of interest-earning assets rose by $219.0 million for the quarter and $170.7 million for the year ended June 30, 2025 [5][8] - Securities available-for-sale and held-to-maturity increased by $91.9 million, or 8.8%, to $1.1 billion at June 30, 2025 [19] Deposit and Borrowing Trends - Total deposits increased by $250.6 million, or 10.5%, to $2.6 billion at June 30, 2025 [19] - NOW deposits rose by $192.6 million, or 10.9%, while certificates of deposits increased by $89.7 million, or 64.8% [19] - Borrowings decreased to $128.1 million at June 30, 2025, from $199.1 million a year earlier [19] Credit Quality - The provision for credit losses for the year ended June 30, 2025, was a charge of $1.3 million, compared to $766,000 in 2024 [10] - Nonperforming loans decreased to $3.1 million at June 30, 2025, from $3.7 million a year earlier [16] - The allowance for credit losses on loans to total loans was 1.24% at June 30, 2025, compared to 1.28% at June 30, 2024 [12] Noninterest Income and Expenses - Noninterest income increased by $1.3 million, or 9.5%, to $15.2 million for the year ended June 30, 2025 [13] - Noninterest expense rose by $2.1 million, or 5.6%, to $39.4 million for the year ended June 30, 2025 [13] - The effective tax rate increased to 14.8% for the year ended June 30, 2025, from 10.2% in 2024 [14]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT UNDER SECTION 13 OF 15(d) OF THE SECURITIES AND EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OF 15(d) OF THE SECURITIES EXCHANGE ACT Commission File Number: 0-25165 GREENE COUNTY BANCORP, INC. (Exact Name of Registrant as Specified in its Charter) United States 14-1809721 (State or other jurisdiction of incorporation or organization) (I.R.S. ...

Financial Performance - Net income for the quarter ended March 31, 2025, was $8.1 million, a 37.4% increase from $5.9 million for the same quarter in 2024[2] - Net income for the nine months ended March 31, 2025, was $21.8 million, compared to $18.0 million for the same period in 2024, reflecting a growth of 20.5%[22] - Basic and diluted earnings per share (EPS) increased to $0.47 for the three months ended March 31, 2025, compared to $0.34 for the same period in 2024[22] - Pre-provision net income increased by $5.0 million, or 26.6%, to $24.0 million for the nine months ended March 31, 2025, compared to $19.0 million for the same period in 2024[4] - Pre-provision net income for Q1 2025 reached $9,138,000, up 48.4% from $6,151,000 in Q1 2024[30] Assets and Loans - Total consolidated assets reached a new record high of $3.0 billion as of March 31, 2025, up from $1.0 billion in 2018[2] - Net loans amounted to $1.6 billion at March 31, 2025, marking a new record high[3] - Net loans receivable rose by $118.0 million, or 8.0%, to $1.6 billion at March 31, 2025, driven primarily by $111.9 million in commercial real estate loans[13] - Average interest-earning assets for Q1 2025 were $2,789,102,000, compared to $2,583,271,000 in Q1 2024, reflecting a growth of 8.0%[28] - The average interest-earning assets for the nine months ended March 31, 2025, were $2,711,083,000, up from $2,556,441,000 in the same period of 2024, indicating a growth of 6.0%[28] Deposits - Total deposits were $2.7 billion at March 31, 2025, also a new record high[3] - Deposits totaled $2.7 billion at March 31, 2025, an increase of $265.5 million, or 11.1%, from $2.4 billion at June 30, 2024[13] Income and Expenses - Net interest income rose by $3.9 million to $16.2 million for the quarter ended March 31, 2025, compared to $12.3 million for the same quarter in 2024[5] - Noninterest income increased by $444,000, or 13.0%, to $3.9 million for the quarter ended March 31, 2025[8] - Noninterest expense increased by $808,000, or 8.8%, to $10.0 million for the quarter ended March 31, 2025, compared to $9.2 million for the same quarter in 2024[11] - The efficiency ratio improved to 50.04% for the three months ended March 31, 2025, down from 58.79% for the same period in 2024[22] Credit Quality - The provision for credit losses on loans was $1.1 million for the quarter ended March 31, 2025, compared to $277,000 for the same quarter in 2024[10] - Nonperforming loans decreased to $2.9 million at March 31, 2025, from $3.7 million at June 30, 2024[10] - The company maintained a non-performing loans to net loans ratio of 0.18% as of March 31, 2025, down from 0.39% a year earlier[22] Return on Equity - The company reported a return on average equity of 14.41% for the three months ended March 31, 2025, compared to 11.92% for the same period in 2024[22]

Core Points - Greene County Bancorp, Inc. reported a net income of $8.1 million for the third quarter of fiscal year 2025, representing a 37.4% increase compared to $5.9 million in the same quarter of the previous year [1][2] - For the nine months ended March 31, 2025, net income was $21.8 million, up from $18.0 million in the prior year, marking a 20.9% increase [1][5] - The company achieved a milestone of $3.0 billion in consolidated assets as of March 31, 2025, with total deposits reaching $2.7 billion [2][5] Financial Performance - Net interest income for the three months ended March 31, 2025, increased by $3.9 million to $16.2 million, and for the nine months, it rose by $5.3 million to $43.4 million [4][21] - Pre-provision net income for the nine months ended March 31, 2025, was $24.0 million, an increase of 26.6% from $19.0 million in the previous year [3][30] - The return on average assets was 1.04% and return on average equity was 13.40% for the nine months ended March 31, 2025 [5][21] Asset and Loan Growth - Total consolidated assets were $3.0 billion, with net loans at $1.6 billion and total securities at $1.1 billion as of March 31, 2025 [2][5] - Average loan balances increased by $113.1 million for the three months and $80.3 million for the nine months ended March 31, 2025 [7][15] - The company experienced a significant increase in commercial real estate loans, contributing to the overall loan growth [15] Credit Quality - The provision for credit losses on loans was $1.1 million for the three months ended March 31, 2025, compared to $277,000 in the same period of the previous year [8][10] - Nonperforming loans decreased to $2.9 million at March 31, 2025, from $3.7 million at June 30, 2024, indicating improved credit quality [10][11] Noninterest Income and Expenses - Noninterest income increased by $444,000, or 13.0%, to $3.9 million for the three months ended March 31, 2025, and by $1.3 million, or 12.6%, to $11.5 million for the nine months [9][21] - Noninterest expense rose by $808,000, or 8.8%, to $10.0 million for the three months ended March 31, 2025, and by $1.6 million, or 5.7%, to $29.0 million for the nine months [9][21] Balance Sheet Highlights - Total deposits increased by $265.5 million, or 11.1%, to $2.7 billion at March 31, 2025, compared to $2.4 billion at June 30, 2024 [15][26] - Shareholders' equity rose to $229.0 million at March 31, 2025, from $206.0 million at June 30, 2024, primarily due to net income and a decrease in accumulated other comprehensive loss [15][26]

Core Points - Greene County Bancorp, Inc. reported a net income of $8.1 million for the three months ended March 31, 2025, and $21.8 million for the nine months ended March 31, 2025, representing increases of 37.4% and 20.9% respectively compared to the same periods in 2024 [1][3][6] - The company achieved a milestone of $3.0 billion in consolidated assets as of March 31, 2025, with net loans of $1.6 billion and total deposits of $2.7 billion, both record highs [3][6][18] - Pre-provision net income for the nine months ended March 31, 2025, was $24.0 million, an increase of 26.6% from the previous year [4][6] Financial Performance - Net interest income increased to $16.2 million for the three months ended March 31, 2025, and $43.4 million for the nine months ended March 31, 2025, driven by higher average balances of interest-earning assets and increased interest rates [5][6][8] - The net interest margin rose to 2.32% for the three months and 2.14% for the nine months ended March 31, 2025, reflecting improved interest income on loans and securities [9][10] - Noninterest income increased to $3.9 million for the three months and $11.5 million for the nine months ended March 31, 2025, primarily due to the Employee Retention Tax Credit and increased fee income [12][6] Credit Quality - Provision for credit losses on loans was $1.1 million for the three months and $2.3 million for the nine months ended March 31, 2025, attributed to loan growth and economic forecast adjustments [10][6] - Nonperforming loans decreased to $2.9 million at March 31, 2025, compared to $3.7 million at June 30, 2024, indicating improved credit quality [15][6] Balance Sheet Highlights - Total assets reached $3.0 billion at March 31, 2025, up from $2.8 billion at June 30, 2024, marking a 6.5% increase [18][6] - Total deposits increased by $265.5 million, or 11.1%, to $2.7 billion as of March 31, 2025 [18][6] - Shareholders' equity rose to $229.0 million at March 31, 2025, primarily due to net income and a decrease in accumulated other comprehensive loss [18][6]

Financial Position - Total assets increased by $140.0 million, or 5.0%, to $2.97 billion at December 31, 2024, compared to $2.83 billion at June 30, 2024[136] - Total deposits rose to $2.5 billion at December 31, 2024, representing an increase of $78.0 million, or 3.3%, from $2.4 billion at June 30, 2024[163] - Shareholders' equity grew to $218.4 million at December 31, 2024, compared to $206.0 million at June 30, 2024, driven by net income of $13.8 million[178] - The Company reported an increase in book value per share to $12.83 at December 31, 2024, up from $12.10 at June 30, 2024[183] - Total assets increased to $2,850,592,000 as of December 31, 2024, from $2,642,902,000 in 2023, marking a growth of 7.9%[187] Loan and Credit Quality - Net loans receivable increased by $51.0 million, or 3.4%, to $1.53 billion at December 31, 2024[136] - The allowance for credit losses (ACL) on loans was $20.2 million at December 31, 2024, compared to $19.2 million at June 30, 2024, with an ACL to total loans receivable ratio of 1.30%[155] - Non-accrual loans totaled $4.1 million as of December 31, 2024, up from $3.7 million at June 30, 2024, with a non-accrual loans to total loans ratio of 0.26%[160] - Loans classified as substandard and special mention totaled $54.2 million at December 31, 2024, an increase of $5.6 million from June 30, 2024[209] - The allowance for credit losses on unfunded commitments increased to $1.7 million as of December 31, 2024, from $1.3 million at June 30, 2024[156] Securities and Investments - Securities available-for-sale and held-to-maturity rose by $105.0 million, or 10.1%, to $1.1 billion at December 31, 2024[136] - Total securities available-for-sale amounted to $374.5 million, representing 32.7% of the portfolio, while total securities held-to-maturity reached $770.9 million, accounting for 67.3% of the portfolio[140] - At December 31, 2024, 59.4% of the securities portfolio consisted of state and political subdivision securities[138] - Mortgage-backed securities represented 32.2% of the securities portfolio at December 31, 2024, with no exposure to sub-prime loans[138] Income and Expenses - The Company’s net interest income is primarily affected by changes in interest rates and the level of assets and liabilities[121] - For the three months ended December 31, 2024, net interest income increased to $14,068,000 from $12,388,000 in 2023, representing a growth of 13.6%[188] - Interest income rose to $29.4 million for the three months ended December 31, 2024, up from $25.6 million in 2023, marking a 14.9% increase[198] - Noninterest income increased by $397,000, or 11.4%, to $3.9 million for the three months ended December 31, 2024, compared to $3.5 million for the same period in 2023[211] - Noninterest expense increased by $60,000, or 0.6%, to $9.4 million for the three months ended December 31, 2024, compared to $9.3 million for the same period in 2023[213] Risk and Liquidity - The Company is exposed to various risks including market risk, credit risk, and liquidity risk, which may materially affect its operations[120] - The primary liquidity measurement indicated a Month 1 liquidity ratio of 101.76% as of December 31, 2024[220] - The Company anticipates sufficient funds to meet current commitments based on cash and cash equivalents and available-for-sale investments[220] - Unfunded loan commitments totaled $141.9 million as of December 31, 2024[220] - The Company had zero brokered deposits at both December 31, 2024, and June 30, 2024[163] Interest Rates and Economic Conditions - The Federal Reserve raised its target benchmark interest rate by 525 basis points from March 2022 to December 2023, impacting market conditions[179] - The net interest margin on a fully taxable-equivalent basis improved to 2.31% in 2024 from 2.19% in 2023[188] - The net interest rate spread for the three months ended December 31, 2024, was 1.80%, up from 1.70% in the previous year[187] - The effective tax rate decreased to 7.3% and 6.9% for the three and six months ended December 31, 2024, respectively, down from 10.4% and 11.8% in the prior year[214]

Financial Performance - Net income for the three months ended December 31, 2024, was $7.5 million, an increase of 31.2% compared to $5.7 million for the same period in 2023[2] - Net income for the six months ended December 31, 2024, was $13.8 million, compared to $12.2 million for the same period in 2023, reflecting a growth of 12.9%[21] - Net income for Q4 2024 was $7,490,000, representing a 31.3% increase from $5,707,000 in Q4 2023[29] - Pre-provision net income increased by $2.1 million, or 16.1%, to $14.9 million for the six months ended December 31, 2024, compared to $12.8 million for the same period in 2023[4] - Pre-provision net income for Q4 2024 was $7,968,000, an increase of 35.5% from $5,877,000 in Q4 2023[29] - Pre-provision net income for the six months ended December 31, 2024, was $14,863,000, an increase of 16.3% from $12,803,000 in the same period of 2023[29] Assets and Liabilities - Total consolidated assets reached a record high of $2.97 billion at December 31, 2024, with net loans of $1.53 billion and total deposits of $2.47 billion[3] - Total assets increased by $140.0 million, or 5.0%, to $2.97 billion at December 31, 2024, compared to $2.83 billion at June 30, 2024[12] - Net loans receivable rose by $51.0 million, or 3.4%, to $1.53 billion at December 31, 2024, driven primarily by $46.4 million in commercial real estate loans[12] - Deposits totaled $2.5 billion at December 31, 2024, an increase of $78.0 million, or 3.3%, from $2.4 billion at June 30, 2024[12] - Securities available-for-sale and held-to-maturity increased by $105.0 million, or 10.1%, to $1.1 billion at December 31, 2024[12] Income and Expenses - Net interest income rose by $1.7 million to $14.1 million for the three months ended December 31, 2024, driven by an increase in the average balance of interest-earning assets[5] - Noninterest income increased by $397,000, or 11.4%, to $3.9 million for the three months ended December 31, 2024, primarily due to higher fee income from interest rate swap contracts and loan fees[8] - Noninterest expense increased by $765,000, or 4.2%, to $18.9 million for the six months ended December 31, 2024, mainly due to higher salaries and employee benefits[10] - Interest income for the three months ended December 31, 2024, was $29.4 million, up from $25.6 million in the same period of 2023, representing a year-over-year increase of 7.1%[21] Tax and Provisions - The effective tax rate decreased to 7.3% for the three months ended December 31, 2024, compared to 10.4% for the same period in 2023, reflecting a higher mix of tax-exempt income[11] - Provision for credit losses on loans amounted to $1.2 million for the six months ended December 31, 2024, up from $645,000 for the same period in 2023, attributed to increased loan volume[9] - Provision for credit losses in Q4 2024 was $478,000, compared to $170,000 in Q4 2023, indicating an increase of 180.0%[29] Ratios and Margins - The net interest margin increased by 10 basis points to 2.04% for the three months ended December 31, 2024, compared to 1.94% for the same period in 2023[9] - The efficiency ratio improved to 52.31% for the three months ended December 31, 2024, compared to 58.78% for the same period in 2023[21] - The company reported a net interest margin of 2.30% for the six months ended December 31, 2024, compared to 2.28% for the same period in 2023[27] - Net interest margin on a fully taxable-equivalent basis for Q4 2024 was 2.31%, up from 2.19% in Q4 2023[27] Equity and Shareholder Information - Shareholders' equity increased to $218.4 million at December 31, 2024, from $206.0 million at June 30, 2024, primarily due to net income and a decrease in accumulated other comprehensive loss[14] - Basic and diluted earnings per share (EPS) increased to $0.44 for the three months ended December 31, 2024, up from $0.34 in the same period of 2023[21]

Core Viewpoint - Greene County Bancorp, Inc. reported strong financial performance for the second quarter of its fiscal year, with significant increases in net income and total assets compared to the previous year [1][3][6]. Financial Performance - Net income for the three months ended December 31, 2024, was $7.5 million, a 31.2% increase from $5.7 million in the same period of 2023 [1][3]. - For the six months ended December 31, 2024, net income was $13.8 million, up from $12.2 million in 2023, marking a 12.9% increase [1][6]. - Pre-provision net income for the six months ended December 31, 2024, was $14.9 million, a 16.1% increase from $12.8 million in 2023 [4]. Asset and Deposit Growth - Total consolidated assets reached a record high of $2.97 billion at December 31, 2024, up from $2.83 billion at June 30, 2024 [6][13]. - Net loans increased to $1.53 billion, a 3.4% rise from $1.48 billion at June 30, 2024 [17]. - Total deposits were $2.5 billion at December 31, 2024, reflecting a 3.3% increase from $2.4 billion at June 30, 2024 [17]. Interest Income and Margin - Net interest income rose to $14.1 million for the three months ended December 31, 2024, compared to $12.4 million in 2023, driven by an increase in interest-earning assets [5][23]. - The net interest margin increased to 2.04% for the three months ended December 31, 2024, up from 1.94% in the same period of 2023 [9][24]. Credit Quality - Provision for credit losses on loans was $505,000 for the three months ended December 31, 2024, compared to $183,000 in 2023, reflecting increased loan volume [9][10]. - Nonperforming loans amounted to $4.1 million at December 31, 2024, compared to $3.7 million at June 30, 2024, indicating a slight increase in credit risk [14]. Noninterest Income and Expense - Noninterest income increased by 11.4% to $3.9 million for the three months ended December 31, 2024, primarily due to higher fee income [14]. - Noninterest expense rose to $9.4 million for the three months ended December 31, 2024, a slight increase from $9.3 million in 2023 [14]. Tax and Effective Tax Rate - The effective tax rate was 7.3% for the three months ended December 31, 2024, down from 10.4% in the same period of 2023, reflecting a higher mix of tax-exempt income [12]. Shareholder Equity - Shareholders' equity increased to $218.4 million at December 31, 2024, compared to $206.0 million at June 30, 2024, primarily due to net income and a decrease in accumulated other comprehensive loss [17].

Financial Performance - Net income for the three months ended September 30, 2024, was $6.3 million, a decrease of 3.2% from $6.5 million in the same period of 2023[1] - Net income for the three months ended September 30, 2024, was $6,261,000, down from $6,469,000, a decrease of 3.2%[26] - Basic and diluted EPS decreased to $0.37 from $0.38, a decline of 2.6%[26] Assets and Deposits - Total assets reached a new record high of $2.9 billion at September 30, 2024, an increase of $48.8 million, or 1.7%, from $2.8 billion at June 30, 2024[15] - Total assets as of September 30, 2024, were $2,874,621,000, up from $2,825,788,000, an increase of 1.7%[27] - Total deposits increased to $2.5 billion at September 30, 2024, up $96.7 million, or 4.1%, from $2.4 billion at June 30, 2024[17] - Total deposits increased to $2,485,874,000 from $2,389,222,000, reflecting a growth of 4.0%[27] Loans and Credit Losses - Net loans remained at $1.5 billion at September 30, 2024, with a growth of $15.3 million in commercial real estate loans[17] - Provision for credit losses on loans was $634,000 for the three months ended September 30, 2024, compared to $457,000 in the same period of 2023[9] - Provision for credit losses increased to $634,000 from $457,000, reflecting a rise of 38.7%[26] - The allowance for credit losses on loans to non-performing loans was 542.39%, up from 369.10%, showing an increase in coverage for potential loan losses[26] Income and Expenses - Noninterest income increased by $438,000, or 13.3%, to $3.7 million for the three months ended September 30, 2024, compared to $3.3 million in the same period of 2023[12] - Noninterest income rose to $3,737,000, compared to $3,299,000, marking an increase of 13.3%[26] - Noninterest expense rose by $705,000, or 8.0%, to $9.6 million for the three months ended September 30, 2024, primarily due to increased salaries and employee benefits[13] Tax and Efficiency - The effective tax rate decreased to 6.4% for the three months ended September 30, 2024, from 13.0% in the same period of 2023[14] - The efficiency ratio for the period was 56.60%, compared to 52.84% in the previous year, indicating a decline in operational efficiency[26] Interest Income - Interest income for the three months ended September 30, 2024, was $27,769,000, an increase from $24,672,000 in the same period last year, representing a growth of 8.5%[26] - Net interest income for the same period was $13,136,000, slightly down from $13,439,000, indicating a decrease of 2.3%[26] - The net interest margin decreased to 2.03% for the three months ended September 30, 2024, down from 2.12% in the same period of 2023[7] Shareholders' Equity - Shareholders' equity increased to $216.3 million at September 30, 2024, compared to $206.0 million at June 30, 2024, driven by net income and a decrease in accumulated other comprehensive loss[18]