GCBC director sells 10,000 shares at $28.77

GREENE COUNTY BANCORP INC director Michelle M. Plummer reported an open-market sale of common stock.

Rhea-AI Filing Summary

GREENE COUNTY BANCORP INC director Michelle M. Plummer reported an open-market sale of common stock. She sold 10,000 shares on June 11, 2026 at a weighted average price of $28.77 per share, with individual trade prices ranging from $28.58 to $29.34.

Following the sale, Plummer directly owned 99,560 common shares. She also reported an indirect holding of 50,327 common shares through an ESOP, which reflects plan-related beneficial ownership rather than a new transaction.

Insider Trade Summary

Net Seller: 10,000 shares

Net Sell 2 txns

Insider PLUMMER MICHELLE M

Role Director

Sold 10,000 shs ($288K)

Type	Security	Shares	Price	Value
Sale	Common Stock	10,000	$28.77	$288K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 99,560 shares (Direct); Common Stock — 50,327 shares (Indirect, By ESOP)

Footnotes (1)

1. F1. The price covered in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.58-$29.34, inclusive. The reporting person undertakes to provide to Greene County Bancorp, Inc., any security holder of Greene County Bancorp, Inc., of the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the rate set forth in this footnote.

Key Figures

Shares sold: 10,000 shares Weighted average sale price: $28.77/share Sale price range: $28.58–$29.34/share +2 more

5 metrics

Shares sold 10,000 shares Open-market sale on June 11, 2026

Weighted average sale price $28.77/share Open-market sale of 10,000 shares

Sale price range $28.58–$29.34/share Multiple trades included in weighted average

Direct holdings after sale 99,560 shares Common stock directly owned post-transaction

Indirect ESOP holdings 50,327 shares Common stock held indirectly by ESOP

Key Terms

open-market sale, weighted average price, ESOP, indirect ownership

4 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"The price covered in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

ESOP financial

"nature_of_ownership": "By ESOP""

An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.

indirect ownership financial

"ownership_type": "indirect""

FAQ

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

What insider transaction did GCBC director Michelle Plummer report?

Michelle M. Plummer reported selling 10,000 shares of Greene County Bancorp common stock. The sale occurred on June 11, 2026, as an open-market transaction at a weighted average price of $28.77 per share, with prices ranging between $28.58 and $29.34.

At what price did Michelle Plummer sell GCBC shares on June 11, 2026?

She sold 10,000 Greene County Bancorp shares at a weighted average price of $28.77. According to the filing, individual trades were executed between $28.58 and $29.34 per share, reflecting multiple fills within that price range during the same trading day.

How many GCBC shares does Michelle Plummer hold after this Form 4 transaction?

After the reported sale, Michelle Plummer directly owned 99,560 Greene County Bancorp common shares. The filing also shows an additional 50,327 shares held indirectly through an ESOP, which represents plan-related beneficial ownership rather than a separate market transaction.

What is the nature of Michelle Plummer’s indirect GCBC share ownership?

Her indirect ownership consists of 50,327 Greene County Bancorp common shares held "By ESOP." This indicates the shares are associated with an employee stock ownership plan, where beneficial interests are attributed through the plan rather than direct individual holdings.

Does the GCBC Form 4 mention multiple trade executions for the sold shares?

Yes. The footnote explains that the 10,000 shares were sold in multiple transactions. The reported column price is a weighted average, and individual trade prices ranged from $28.58 to $29.34, with full price breakdowns available upon request to the company or regulators.

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

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Accepted by SEC EDGAR 06/15/2026 - 11:55 AM 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^*

PLUMMER MICHELLE M

(Last) (First) (Middle)

302 MAIN STREET

(Street)

CATSKILL NEW YORK 12414

(City) (State) (Zip)

UNITED STATES

(Country)

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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/11/2026

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

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

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

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	06/11/2026		S		10,000	D	$28.77(1)	99,560	D
Common Stock								50,327	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:

1. The price covered in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.58-$29.34, inclusive. The reporting person undertakes to provide to Greene County Bancorp, Inc., any security holder of Greene County Bancorp, Inc., of the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the rate set forth in this footnote.

	/s/ Michelle Plummer	06/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)