GCBC officer John Antalek reports 1,500-share insider purchase

Rhea-AI Filing Summary

Greene County Bancorp, Inc. (GCBC) reported an insider share purchase by its Executive Vice President and Chief Lending Officer, John Antalek. On 11/18/2025, he acquired 1,500 shares of common stock at $22 per share through a 401(k) plan transaction coded as a purchase. Following this trade, he beneficially owned 7,567 shares through the 401(k), 1,023 shares through an ESOP, and 600 shares directly.

Insider Trade Summary

Net Buyer: 1,500 shares ($33,000)

Net Buy 3 txns

Insider Antalek John

Role EVP and CLO

Bought 1,500 shs ($33K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	1,500	$22.00	$33K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 7,567 shares (Indirect, By 401(k)); Common Stock — 600 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

Antalek John

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP and CLO

3. Date of Earliest Transaction (Month/Day/Year)
11/18/2025

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	11/18/2025		P		1,500	A	$22	7,567	I	By 401(k)
Common Stock								1,023	I	By ESOP
Common Stock								600	D

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/ John Antalek	11/19/2025
	** 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.

FAQ

What insider transaction was reported for Greene County Bancorp (GCBC)?

The filing reports that EVP and Chief Lending Officer John Antalek purchased 1,500 shares of Greene County Bancorp common stock at $22 per share on 11/18/2025 through a 401(k) plan.

What is John Antalek’s role at Greene County Bancorp (GCBC)?

John Antalek is reported as an officer of Greene County Bancorp, serving as Executive Vice President (EVP) and Chief Lending Officer (CLO).

How many Greene County Bancorp (GCBC) shares does John Antalek hold after the transaction?

After the reported transaction, John Antalek beneficially owned 7,567 shares of GCBC common stock through a 401(k), 1,023 shares through an ESOP, and 600 shares directly.

What was the price paid per share in the GCBC insider purchase?

The 1,500 shares of Greene County Bancorp common stock were acquired at a price of $22 per share in the 401(k) plan transaction.

Was any derivative security activity reported for Greene County Bancorp (GCBC)?

No. The section for Table II - Derivative Securities shows no derivative securities acquired, disposed of, or beneficially owned in this filing.

Is this Form 4 filed by more than one reporting person for GCBC?

No. The filing indicates that the Form 4 is filed by one reporting person, covering the holdings and transaction of John Antalek only.