Greene County Bancorp (Nasdaq: GCBC) details record earnings and growth

Filing Impact

(High)

Filing Sentiment

(Neutral)

Form Type

8-K

Rhea-AI Filing Summary

Greene County Bancorp, Inc. furnished an investor presentation in connection with planned first‑quarter 2026 meetings with institutional investors and other interested parties. The presentation, available on the company’s website, reviews strategy, financial performance, and market position and is furnished under Item 7.01, not filed for liability purposes.

As of December 31, 2025, total assets were $3.1 billion, up from $3.0 billion a year earlier. Shareholders’ equity rose to $258.3 million from $238.8 million at June 30, 2025, supported by $19.2 million in net income for the six months ended December 31, 2025 and lower accumulated other comprehensive loss.

The bank highlights a net interest margin of 2.54% for the quarter ended December 31, 2025, up 50 basis points from 2.04% a year earlier, and most recent‑quarter ROAA and ROAE of 1.33% and 16.27%, respectively. The efficiency ratio was 46.9% for the six months ended December 31, 2025, indicating tight expense control.

Credit and balance‑sheet metrics remain conservative, with nonperforming assets at 0.10% of assets and loans‑to‑deposits at 63.9%. Tangible common equity to tangible assets was 8.21% at December 31, 2025. Deposits totaled $2.64 billion, loans held for investment $1.69 billion, and the securities portfolio $1.22 billion, mostly held‑to‑maturity municipals and mortgage‑backed securities.

The company also emphasizes its mutual holding company structure, with 17,026,828 shares outstanding as of December 31, 2025, of which 54.1% are owned by Greene County Bancorp, MHC and 45.9% by public shareholders. It notes a history of asset and earnings growth, a low‑cost deposit base concentrated in New York’s Hudson Valley and Capital Region, and long‑term community focus.

Dividend history features steadily rising payouts, including a quarterly dividend of $0.10 per share announced in July 2025, equivalent to $0.40 annually, up 11.1% from $0.36. The mutual holding company has cumulatively waived about $36.6 million of dividends since 2001, supporting capital retention.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

03/09/2026 - 09:03 AM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): March 9, 2026

GREENE COUNTY BANCORP, INC.

(Exact Name of Registrant as Specified in its Charter)

United States		0-25165		14-1809721
(State or Other Jurisdiction of Incorporation)		(Commission File No.)		(I.R.S. Employer Identification No.)

302 Main Street, Catskill NY		12414
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (518) 943-2600

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of class	Trading symbol	Name of exchange on which registered
Common Stock, $0.10 par value	GCBC	The Nasdaq Stock Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01

Regulation FD Disclosure

The management of Greene County Bancorp, Inc. (the “Company”) intends to participate in meetings with institutional investors and other interested parties during the first quarter of 2026 to discuss the Company’s strategies, recent performance, and trends.

The investor presentation prepared by the Company for use in these meetings is available on the Company’s website at www.thebankofgreenecounty.com under Investor Relations and “Events & Presentations.” Investors should note that the Company announces material information in Securities and Exchange Commission (the “SEC”) filings and press releases.

This investor presentation is furnished pursuant to Item 7.01 of Form 8-K and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date of this report, except as shall be expressly set forth by specific reference in such filing.

The investor presentation is furnished as Exhibit 99.1 to this report.

Item 9.01.

Financial Statements and Exhibits

Exhibit No.	Description

99.1	Investor Presentation December 2025

Exhibit Number Description

104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

	GREENE COUNTY BANCORP, INC.

DATE: March 9, 2026	By:	/s/ Donald E. Gibson
	Donald E. Gibson
	President and Chief Executive Officer

Exhibit 99.1

March 2026 Investor Presentation

2 Forward-Looking Statements / Non-GAAP Disclosures Forward-Looking Statements This presentation 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. Non-GAAP Financial Measures In addition to presenting information in conformity with accounting principles generally accepted in the United States of America (GAAP), this presentation contains financial information determined by methods other than GAAP (non-GAAP). The following measures used in this Presentation, 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 Presentation supplemental disclosures for the calculation of tangible common equity to tangible assets and net interest margin fully taxable-equivalent. 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 appendix for Non-GAAP to GAAP reconciliations.

3 Greene County Bancorp, Inc. Overview As of December 31, 2025 Number of Shares Ownership Owned by Greene County Bancorp, MHC 9,218,528 54.1% Owned by Public Shareholders 7,808,300 45.9% Total Shares Outstanding 17,026,828 17,026,828 Shareholder Ownership as of December 31, 2025 Financial Summary December 31, 2025 Financial Highlights Total Assets $3.1B MRQ Net Income $10.3M MRQ / LTM ROAA 1.33% / 1.22% NPAs / Assets 0.10% MRQ / LTM ROAE 16.27% / 15.33% TCE / TA¹ 8.21% MRQ NIM FTE¹ 2.83% Loans / Deposits 63.9% 1889 1998 1999 2024 Greene County Bancorp, Inc. listed publicly on the Nasdaq under the ticker GCBC Celebrated 135 years in business and 25 years as a publicly traded company on Nasdaq Bank of Greene County founded in Catskill, New York Mutual Holding Company formed to own 100% of Bank of Greene County; sold 45% to the public 1) See Appendix for Non-GAAP reconciliation Note: Fiscal year ends June 30th of each year; LTM represents last twelve months; MRQ represents most recent quarter Source: S&P Capital IQ Pro; Company documents

4 2000 2001 2002 Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro Organization with Deep Roots in the Communities it Serves Greene County Bancorp, Inc. (Nasdaq: GCBC) is the holding company for the Bank of Greene County and its subsidiary Greene County Commercial Bank, serving New York’s Hudson Valley and Capital Region For over 137 years, the company has delivered steady growth grounded in security, service, and soundness Recognized as the #1 Commercial Mortgage Lender in the Capital Region and one of the fastest-growing companies over $100 million by the Albany Business Review Greene County Bancorp continues to build long-term value for customers, communities, and shareholders $168 $185 $220 $257 $285 $295 $308 $326 $380 $461 $495 $548 $591 $634 $674 $739 $869 $982 $3,041 $3,147 $2,826 $2,698 $2,572 $2,200 $1,677 $1,269 $1,151 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 MRQ Total Assets as of Fiscal Period Shown ($M)

5 1) Clifton Park, NY branch opened on October 15, 2025 Note: Star denotes GCBC’s headquarters; Deposit market share data as of June 30, 2025 Source: S&P Capital IQ Pro Strong Commitment to Upstate New York Market Deposit Market Share by County Branch Map GCBC (19) Headquarters (1) Deposits Market County (New York) Rank Branches ($000) Share (%) Greene 1 6 $1,817,792 50% Columbia 2 6 $398,720 28% Albany 12 3 $228,680 1% Ulster 9 2 $182,470 4% Rensselaer 11 1 $43,329 2% Saratoga¹ 15 1 $0 0% Total 19 $2,670,991 2026 Median HHI Income ($) $84,492 $95,573 $88,141 $95,442 $91,644 $100,118 $91,356 $86,867 Greene Columbia Albany Ulster Rensselaer Saratoga New York State Nationwide

6 Source: S&P Capital IQ Pro; Company documents Most Recent Quarter Financial Highlights Selected Highlights Key Statistics Balance Sheet Total assets of the Company were $3.1 billion at December 31, 2025 and $3.0 billion at December 31, 2024, an increase of $181.2 million, or 6% Shareholders’ equity increased to $258.3 million at December 31, 2025 as compared to $238.8 million at June 30, 2025, resulting primarily from net income of $19.2 million and a decrease in accumulated other comprehensive loss of $1.8 million Income Statement Net Income was $19.2 million for the six months ended December 31, 2025, a new record high for a three month period ended Net interest margin increased 50 basis points to 2.54% for the three months ended December 31, 2025 as compared to 2.04% for the three months ended December 31, 2024 The effective tax rate was 10.9% and 11.9% for the three and six month ended December 31, 2025 Efficiency ratio was 46.9% for the six month ended December 31, 2025 Key Events In July of 2025, the Company announced that its Board of Directors has approved a quarterly cash dividend of $0.10 per share on the Company’s common stock The dividend reflects an annual cash dividend rate of $0.40 per share which represents an 11.1% increase from the previous annual cash dividend of $0.36 per share

$2,200 $2,572 $2,698 $2,826 $3,041 $3,147 2021 2022 2023 2024 2025 MRQ $1,106 $1,252 $1,409 $1,499 $1,627 $1,687 2021 2022 Tangible Common Equity¹ ($M) 2023 2024 2025 MRQ $150 $158 $183 $206 $239 $258 2021 2022 2023 2024 2025 MRQ $2,005 $2,213 $2,437 $2,389 $2,640 $2,641 2021 2022 2023 2024 2025 MRQ Demonstrated Ability to Drive Balance Sheet Growth Total Deposits ($M) Gross Loans HFI ($M) Total Assets ($M) 1) See Appendix for Non-GAAP reconciliation Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 7

High-Performing Profitability Efficiency Ratio (%) 2021 2022 Net Interest Margin FTE (%)¹ Return on Average Equity (%) Return on Average Assets (%) 17.41% 17.93% 18.13% 12.87% 14.08% 16.27% 2021 2022 2023 2024 2025 MRQ 1.24% 1.18% 1.19% 0.93% 1.10% 1.33% 2023 2024 2025 MRQ 2.97% 2.69% 2.66% 2.25% 2.47% 2.83% 2021 2022 2023 2024 2025 MRQ 49.7% 1) See Appendix for Non-GAAP reconciliation Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 7 48.4% 52.6% 57.5% 52.3% 47.1% 2021 2022 2023 2024 2025 MRQ

Well-Positioned to Grow 2021 2022 2023 2024 2025 MRQ Bank Level Tier 1 Risk Based Capital Ratio (%) 2021 2022 2023 2024 Bank Level Leverage Ratio (%) Company TCE / TA (%)¹ Company Total Equity ($M) 2021 2022 2023 2024 2025 MRQ Bank Level Total Risk Based Capital Ratio (%) Bank Loans / Deposits (%) 56.6% 55.1% 57.8% 62.8% 61.6% 63.9% 16.9% 16.0% 16.5% 17.1% 16.6% 16.9% 2021 2022 2023 2024 2025 MRQ $150 $158 $183 $206 $239 $258 2025 MRQ 6.80% 6.13% 6.79% 7.29% 7.85% 8.21% 15.6% 14.8% 15.2% 15.9% 15.4% 15.6% 2021 2022 2023 2024 2025 MRQ 8.14% 7.98% 1) See Appendix for Non-GAAP reconciliation Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 7 8.68% 9.29% 9.24% 9.37% 2021 2022 2023 2024 2025 MRQ

History of Growth 184% 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 MRQ TBVPS + DPS Growth (%) Compound Tangible Book Value per Share + Dividends (Non-GAAP) Growth Total Asset Growth 262% 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 MRQ Asset Growth (%) Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 10 Company Growth Expansion….. While Growing Shareholder Impact

Historical Dividends Since 2015 Dividends Per Share Paid dividends of $0.18 or greater every year since 2015 From 2015 to 2025, GCBC has continued to increase the annual dividend each year The company has the ability and history of waiving dividends to the Mutual Holding Company (MHC) On a cumulative basis, the MHC has waived approximately $36.6 million of dividends since 2001, retaining capital at the Bancorp $0.18 $0.19 $0.19 $0.20 $0.20 $0.22 $0.24 $0.26 $0.28 $0.32 $0.36 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 10

Loan Portfolio Overview Net Charge-offs / Average Net Loans Receivable (%) Nonperforming Assets / Assets (%) Loan Portfolio Composition as of December 31, 2025 Amount (%) of Loan Type ($000's) Total Residential $414,829 24.6% CRE 1,097,997 65.1% Home Equity 40,574 2.4% Consumer 4,106 0.2% Commercial 129,678 7.7% Total Loans $1,687,184 100.0% $1.7B Total 0.25% 0.21% 0.13% 0.10% 0.10% 0.11% 2021 2022 2023 2024 2025 MRQ 0.04% 0.02% 0.04% 0.10% 0.02% 0.03% 2021 2022 2023 2024 2025 MRQ Residential 24.6% Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 10 CRE 65.1% Home Equity 2.4% Consumer 0.2% Commercial 7.7%

Deposit Composition Overview Cost of Deposits (%) Cost of Funds (%) Deposit Composition as of December 31, 2025 Amount (%) of Deposit Type ($000's) Total Noninterest-bearing deposits $105,171 4.0% Certificates of deposit 205,948 7.8% NOW deposits 2,000,305 75.7% Money Market & Savings 329,616 12.5% NIB 4.0% CDs 7.8% NOW deposits 75.7% Money Market & Savings 12.5% 0.98% 2.16% 2.23% 2.05% 0.29% 0.25% 2021 2022 2023 2024 2025 MRQ 0.24% Total Deposits $2,641,040 100.0% 2021 2022 2023 2024 2025 MRQ Note: Fiscal year ended June 30 Source: S&P Capital IQ Pro; Company documents 13 0.16% 0.87% 2.10% 2.19% 2.02% $2.6B Total

Available-for-Sale 34% 14 Held-to-Maturity 66% Source: S&P Capital IQ Pro; Company documents Securities Portfolio Composition Portfolio as of December 31, 2025 Securities Portfolio Breakdown (as of December 31, 2025) $1.2B Total December 31, 2025 (Dollars in thousands) Balance % of Portfolio Securities Available-for-Sale: U.S. Treasury securities $47,505 3.9% U.S. government sponsored enterprises 6,400 0.5% State and political subdivisions 227,450 18.6% Mortgage-backed securities-residential 36,144 3.0% Mortgage-backed securities-multifamily 75,911 6.2% Corporate debt securities 18,180 1.5% Total Securities Available-for-Sale $411,590 33.7% Securities Held-to-Maturity: U.S. Treasury securities $15,877 1.3% State and political subdivisions 479,390 39.2% Mortgage-backed securities-residential 159,926 13.1% Mortgage-backed securities-multifamily 123,656 10.1% Corporate debt securities 31,419 2.6% Other securities 26 0.0% Total Securities Held-to-Maturity $810,294 66.3% Total Securities (at carrying value) $1,221,884 100.0%

Opened October 25, 2025 Source: Company documents Focused on Growth & Targeted Expansion Capital Region Banking Center Albany County, NY Clifton Park Saratoga County, NY Continued Growth Into New York’s Capital Region and Hudson Valley 14 Opened March 19,2024 Expansion 3 Winners Circle, Colonie 1208 Route 146, Clifton Park

Greene County Bancorp is Strong & Well Positioned for Continued Growth Experienced Senior Management Team and Board of Directors with Extensive Banking Knowledge Attractive Low-Cost Deposit Base Clean Asset Quality Through Strict Underwriting Standards and Strong Credit Risk Management Well Capitalized Achieved Record Net Income for 16 Out of the Last 17 Fiscal Years Highly Profitable Business Model, Efficient Operations, Consistently Strong Returns for Shareholders Established Franchise With History of Stability & Serving Its Community – 137 Years! 14

#1 Commercial Mortgage Lender in the Capital Region by Albany Business Review Ranked one of the Fastest Growing Companies in the Capital Region by Albany Business Review Recent Awards Bauer Financial, Inc - 5 Star Superior Rating 16th Consecutive Year Recognized as a Top-Performing Bank in Piper Sandler’s Class of 2025 Bank & Thrift Small-Cap All Stars, GCBC has been recognized nine times in the last 21 years 14

Source: Company documents Charitable Foundation Formed in 1998, funded initially by Bank stock & cash $4 million in total contributions since inception Granted over $556,000 to over 491 organizations in 2025 Awards fund education, health and wellness, social and civic services, culture and arts, housing, and emergency home repairs for seniors and low income households 14

Appendix

Executive Management Team Presenting Donald E. Gibson has served as President and Chief Executive Officer of Greene County Bancorp, Inc. and the Bank of Greene County since 2007. He has been with the Bank since 1987, holding various positions of increasing responsibility prior to his appointment as President and CEO. Under his leadership as President and CEO, the Bank has grown from approximately $300 million in assets to over $3 billion and has achieved record earnings in 16 of the past 17 years. Mr. Gibson also serves as Chairperson of the Board of Directors of Atlantic Community Bankers Bank and is a current Board Member. Nick Barzee is a Certified Public Accountant and has served as the Senior Vice President and Chief Financial Officer of the Company and the Bank since July 1, 2024. Prior to this appointment, Mr. Barzee served as Vice President, Director of Finance since 2023 and Vice President, Controller since 2021. Prior to joining the Company and Bank, Mr. Barzee worked as a Senior Manager with KPMG LLP in Albany, NY and New York City for over 12 years. Mr. Barzee holds both a Master’s degree in Business Administration and a Bachelor's degree in Accounting from the State University of New York at Oswego. Scott Houghtaling has served as Senior Vice President and Chief Credit & Banking Officer since June 2024. Prior to his appointment, Mr. Houghtaling served as Senior Managing Director at Berkshire Bank. He has many ties to the local community, graduating High School from Ravena-Coeymans-Selkirk Central School and obtaining his Bachelor of Science degree from Siena College. He is also very involved in the local community, serving as a Board Member for the Center for Economic Growth and a Board Trustee for Catholic Charities of the Diocese of Albany. Source: Company website 20

Board of Directors Christopher Cannucciari is a partner at Lutz, Selig & Zeronda, CPAs, LLP. Mr. Cannucciari is a Certified Public Accountant and Accredited in Business Valuation, and earned his Bachelor of Science in Finance from Siena College and his Master of Business Administration in Public Accounting from the University of Rochester. Mr. Cannucciari was elected to the Board of Directors in 2024 and had previously been a member of The Bank of Greene County’s Advisory Board since 2013. Mr. Cannucciari served as the Northeast Chapter President for the New York State Society of CPA’s for the term ended May 31, 2016, and was a Board Member from 2012-2018. Mr. Cannucciari also serves as Treasurer of the Capital Region Chamber of Commerce. Mr. Cannucciari brings his expertise in accounting principles as well as tax and financial reporting rules and regulations to the Board of Greene County Bancorp, Inc., in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Christopher Cannucciari Director Jay P. Cahalan is retired. Prior to his retirement in 2022, Mr. Cahalan was the former President and Chief Executive Officer of Columbia Memorial Health (CMH). He continues to serve CMH as Chairman of the Columbia Memorial Health Foundation. Mr. Cahalan worked with CMH for 29 years in executive leadership positions prior to his retirement. He was also President and part-owner of Hudson Health & Fitness in Hudson and served as President of the Greene County Rural Health Network before retiring as its President in 2016. Prior to his appointment to the Board of Directors in 2015, Mr. Cahalan served as a member of The Bank of Greene County’s Advisory Board of Directors since 2012. Mr. Cahalan has a Master of Science in Law from Champlain College in Vermont, a Master of Arts from the University of Connecticut, and a Bachelor of Science from Southern Connecticut State University. Mr. Cahalan’s health care services experience provides valuable business and leadership skills and financial acumen to the Board in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Jay P. Cahalan Chairman John Brust is the Principal and an owner of Delaware Engineering, D.P.C, an Albany-based firm engaged in civil and environmental engineering throughout New York State. Mr. Brust joined Delaware Engineering in 1998 and has over 30 years of experience in technical consulting as well as a broad perspective regarding the economy and the environment. Mr. Brust has been a member of The Bank of Greene County Advisory Board since 2019, and is a graduate of Seton Hall University, and holds a Master of Environmental Science from Rutgers University. Mr. Brust brings to the Board of Directors his expertise in supporting the economic development of New York communities, his experience with regulatory affairs, and his relationships with state and regional agencies, in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. John Brust Director See executive management team page for biography. Donald E. Gibson President, Chief Executive Officer, and Director Source: Company website 20

Board of Directors (Continued) Michelle M. Plummer is retired. Prior to her retirement in June 2024, Ms. Plummer served as Senior Executive Vice President, Chief Operating Officer and Chief Financial Officer, a position held since 2020. Prior to this appointment, Ms. Plummer served as Executive Vice President, Chief Operating Officer and Chief Financial Officer of the Company and the Bank since 2007. Prior to these appointments, Ms. Plummer served as Chief Financial Officer of the Company and the Bank since May 1999. Ms. Plummer is a Certified Public Accountant and a Chartered Global Management Accountant. Prior to her tenure at the Company and Bank, Ms. Plummer held positions with KPMG LLP and the Federal Reserve Bank of New York. Ms. Plummer obtained a Master of Science from Pace University and a Bachelor of Science from Marist College. Ms. Plummer is a member of the AICPA and NYSSCPA. Ms. Plummer’s banking and accounting industry experience brings valuable business and leadership skills and financial acumen to the Board in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Michelle M. Plummer Director Tejraj S. Hada is a highly accomplished entrepreneur and investor with nearly two decades of leadership in the restaurant and hospitality industries. Since 2022, Mr. Hada has been the co-owner of a Hilton Garden Inn and Magnoliya Convention Center in Virginia and holds multiple commercial real estate properties in upstate New York. As a former franchisee of Five Guys Burgers and Fries and TCBY, Mr. Hada oversaw 29 locations across New York and Massachusetts. At its peak, his operations employed more than 500 staff members, and his strong commitment to operational excellence earned him Five Guys’ Franchisee of the Year award in 2015. After successfully selling his restaurant operations, Mr. Hada shifted his focus to other ventures. Mr. Hada holds a degree in Computer Science from the Engineering College Kota and a Postgraduate Diploma in Industrial Engineering from the National Productivity Council in India. Before entering the restaurant industry, he spent 10 years as a software engineer and project leader. In recognition of his entrepreneurial achievements, Mr. Hada was honored with the Small Business Excellence Award by the U.S. Small Business Administration in 2010. Prior to his appointment to the Board of Directors in 2022, Mr. Hada served as a member of The Bank of Greene County’s Advisory Board of Directors. He has served as a board member of the Guilderland Chamber of Commerce. Tejraj S. Hada Director Peter W. Hogan is a shareholder in the Hudson, New York-based accounting firm of Karp, Ackerman, Small & Hogan, CPAs, P.C. He has been with the firm for over 30 years. Mr. Hogan is a Certified Public Accountant. He became Chairman of the Board’s Audit Committee in December 2013. He was formerly a member of The Bank of Greene County’s Advisory Board. He has a Bachelor of Business Administration in Accounting from Siena College. Mr. Hogan brings to the Board of Directors his valuable experience as a business consultant and his expertise in dealing with accounting principles and financial reporting rules and regulations in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Peter W. Hogan Director Charles H. Schaefer is founding partner of the law firm, Deily & Schaefer, Catskill, New York. Mr. Schaefer is a member of the American Bar Association’s Committee on Banking Law, as well as a member of the New York State Bankers Association’s Section on Business Law and its banking subcommittee. Since 1977 he has advised the Bank on various legal matters, becoming General Counsel in 1988 to the Bank’s predecessor, Greene County Savings Bank. As an experienced attorney, Mr. Schaefer brings to the Board a unique and valuable perspective on legal and legal-related issues that may arise in the operations and management of the Company and the Bank. Charles H. Schaefer Director Source: Company website 20

Directors Emeritus Paul E. Slutzky served on the Board of Directors since 1992, was named Chairman in 2020, and retired in November 2022. Mr. Slutzky is a former co-owner of Hunter Mountain Ski Area and its affiliated companies and retired from I. & O. A. Slutzky, Inc., a general construction company. Mr. Slutzky's over 30 years of experience as co-owner and 40 years as a manager of various family owned businesses brings valuable business and leadership skills and financial acumen to the Board in furtherance of the Board's objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Paul E. Slutzky Director David H. Jenkins is a veterinarian and the former owner of Catskill Animal Hospital, Catskill, New York. Dr. Jenkins’ over 30 years of experience as owner and manager of a locally operated business bring valuable business and leadership skills and financial acumen to the Board in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. David H. Jenkins Director Dennis R. O’Grady is a graduate of Union University, Albany College of Pharmacy. He owned and operated Mikhitarian Pharmacy for 31 years, until its sale to Price Chopper in 1999. He has been a Board member since 1981. Mr. O’Grady has also served as the President of Columbia Greene Community College Foundation, President of Catskill Rotary, President of Catskill Boys Club, and President of local chapters of the March of Dimes. He has served on several local not for profit organizations in the role of finance committee member. Mr. O’Grady’s over 30 years of experience as owner of his own pharmaceutical business bring valuable business and leadership skills and financial acumen to the Board in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities. Dennis R. O’Grady Director Martin C. Smith is a retired consultant to Main Bros. Oil Co., Inc., and is the former owner of R.E. Smith Fuel Company, which was purchased by Main Bros. Oil Co., Inc., located in Albany, New York. He became Chairman of the Board in November 2005 and retired in November 2020. Mr. Smith’s 23 years of experience as owner of his own energy services company and an additional 15 years as a consultant in the energy services industry bring valuable business and leadership skills and financial acumen to the Board in furtherance of the Board’s objective of maintaining a membership of experienced and dedicated individuals with diverse backgrounds, perspectives, skills, and other qualities that are beneficial to the Company. Martin C. Smith Director J. Bruce Whittaker retired as President and Chief Executive Officer of the Company and of The Bank of Greene County in June 2007. Mr. Whittaker has been affiliated with the Bank in various capacities since 1972. Mr. Whittaker was appointed to the Board of Trustees of the Bank in 1987. As the former President and Chief Executive Officer of the Company and the Bank, Mr. Whittaker offers a wealth of management experience, business understanding, and knowledge of banking regulations and our market area, along with a deep understanding of the role of the Board of Directors. Mr. Whittaker’s prior experience gives him front-line exposure to many of the issues facing the Company as well as extensive valuable experience in overseeing, among other matters, the Company’s banking business. J. Bruce Whittaker Director Source: Company website 20

For fiscal year ended June 30, MRQ ($000s) 2021 2022 2023 2024 2025 12/31/25 Total Common Equity $149,584 $157,714 $183,283 $206,000 $238,837 $258,268 Goodwill -- -- -- -- -- -- Other Intangibles -- -- -- -- -- -- Less: Total Intangible Assets -- -- -- -- -- -- Tangible Common Equity $149,584 $157,714 $183,283 $206,000 $238,837 $258,268 Total Assets $2,200,335 $2,571,740 $2,698,283 $2,825,788 $3,040,609 $3,146,995 Goodwill -- -- -- -- -- -- Other Intangibles -- -- -- -- -- -- Less: Total Intangible Assets -- -- -- -- -- -- Tangible Assets $2,200,335 $2,571,740 $2,698,283 $2,825,788 $3,040,609 $3,146,995 Tangible Common Equity / Tangible Assets 6.80% 6.13% 6.79% 7.29% 7.85% 8.21% Net Interest Margin FTE For fiscal year ended June 30, MRQ ($000s) 2021 2022 2023 2024 2025 12/31/25 Net Interest Income $53,145 $58,005 $61,218 $50,979 $60,121 $19,059 Tax-Equivalent Adjustment 3,032 3,670 5,258 6,791 7,679 2,174 Net Interest Income Fully Taxable-Equivalent $56,177 $61,675 $66,476 $57,770 $67,800 $21,233 Average Interest-Earning Assets $1,892,650 $2,291,448 $2,495,653 $2,568,756 $2,739,472 $2,997,338 Net Interest Margin Fully Taxable-Equivalent 2.97% 2.69% 2.66% 2.25% 2.47% 2.83% Source: Company documents 24 Non-GAAP Reconciliation Tangible Common Equity / Tangible Assets

Source: View Original Filing on SEC EDGAR

FAQ

What is the purpose of Greene County Bancorp (GCBC) latest 8-K filing?

Greene County Bancorp’s 8-K furnishes an investor presentation used in first-quarter 2026 meetings. It outlines strategy, market position, and recent financial performance, including growth in assets, earnings, and capital, helping investors understand the bank’s current condition and long-term business approach.

How did Greene County Bancorp (GCBC) perform financially as of December 31, 2025?

As of December 31, 2025, Greene County Bancorp reported $3.1 billion in assets and shareholders’ equity of $258.3 million. Net income reached $19.2 million for the six months ended December 31, 2025, supporting strong returns while maintaining conservative credit and capital profiles across the balance sheet.

What profitability metrics does Greene County Bancorp (GCBC) highlight in the investor presentation?

The company highlights a net interest margin of 2.54% for the quarter ended December 31, 2025, up 50 basis points year over year. Most recent-quarter ROAA was 1.33% and ROAE 16.27%, with a 46.9% efficiency ratio for the six months ended December 31, 2025, indicating solid profitability and cost control.

How strong are Greene County Bancorp’s (GCBC) asset quality and loan portfolio?

Greene County Bancorp reports nonperforming assets at just 0.10% of total assets, reflecting clean credit quality. Total loans held for investment were $1.69 billion, with 65.1% in commercial real estate and 24.6% in residential loans, supported by strict underwriting and low net charge-offs relative to average loans.

What are Greene County Bancorp’s (GCBC) capital and funding characteristics?

Tangible common equity to tangible assets was 8.21% at December 31, 2025, with bank-level risk-based and leverage ratios above regulatory minimums. Deposits totaled $2.64 billion, largely in low-cost NOW accounts, and the loans-to-deposits ratio was 63.9%, indicating ample funding and balance-sheet flexibility.

What dividend policies and history does Greene County Bancorp (GCBC) present?

The company has paid at least $0.18 per share annually since 2015 and steadily increased its dividend, reaching $0.40 per share annually in 2025. The mutual holding company has waived approximately $36.6 million of dividends since 2001, helping retain capital at the Bancorp for continued growth.

How is Greene County Bancorp (GCBC) positioned in its New York markets?

Greene County Bancorp focuses on New York’s Hudson Valley and Capital Region, operating 19 branches with strong share in Greene and Columbia counties. It is recognized as the number one commercial mortgage lender in the Capital Region and continues selective expansion, including recent branches in Colonie and Clifton Park.

Filing Exhibits & Attachments

4 documents

Press Releases

EX-99.1 EXHIBIT 99.1 62.1 KB