Greene County Bancorp (GCBC) CEO buys 1,000 shares at $21.75–$22

Greene County Bancorp (GCBC) President and CEO Donald Gibson reported insider purchases on 10/29/2025.

Rhea-AI Filing Summary

Greene County Bancorp (GCBC) President and CEO Donald Gibson reported insider purchases on 10/29/2025. He acquired 1,000 shares in two transactions at $22.00 and $21.75, recorded as indirect ownership through his 401(k).

Following these transactions, his 401(k) held 1,000 shares. He also reported additional indirect beneficial ownership of 125,100 shares by trust and 45,095 shares by ESOP. Gibson is listed as a Director and Officer (President and CEO), and the filing indicates it was made by one reporting person.

Insider Trade Summary

Net Buyer: 1,000 shares

Net Buy 4 txns

Insider Gibson Donald E

Role President and CEO

Bought 1,000 shs ($22K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	500	$22.00	$11K
Purchase	Common Stock	500	$21.75	$11K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 1,000 shares (Indirect, 401(k)); Common Stock — 125,100 shares (Indirect, By Trust); Common Stock — 45,095 shares (Indirect, By ESOP)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did GCBC report?

On 10/29/2025, Donald Gibson reported purchases totaling 1,000 shares at $22.00 and $21.75, held indirectly via 401(k).

What is Donald Gibson’s role at GCBC?

He is a Director and serves as President and CEO.

How many GCBC shares were in Gibson’s 401(k) after the transactions?

His 401(k) held 1,000 shares following the reported purchases.

What other indirect GCBC holdings did Gibson report?

He reported 125,100 shares held by trust and 45,095 shares held by ESOP.

What was the transaction code for the GCBC trades?

The filing lists transaction code P for the purchases.

Was the filing made by one or multiple reporting persons?

It was filed by one reporting person.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 10/30/2025 - 06:40 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gibson Donald E

(Last) (First) (Middle)

302 MAIN STREET

(Street)

CATSKILL NY 12414

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GREENE COUNTY BANCORP INC [ GCBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
10/29/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/29/2025		P		500	A	$22	500	I	401(k)
Common Stock	10/29/2025		P		500	A	$21.75	1,000	I	401(k)
Common Stock								125,100	I	By Trust
Common Stock								45,095	I	By ESOP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Donald Gibson	10/30/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.