$GCBC

$35.46 -$0.36 (1.01%) Close

$GCBC Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 17.0M shares outstanding

Who owns GCBC?

By type of holder

Institutions 14.9% Insiders 3.7% Everyone else 81.4%

Concentration Top 10 holders own 13.4%

BlackRock, Inc. 3.9% · Vanguard Capital Management LLC 2.9%

Institutional ownership

14.9%

+1.3 pts vs last qtr

Institutional holders

+3 vs last qtr

Net shares bought

+228.7K

by institutions in Q2 2026

New / sold out

12 / 9

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Vanguard Capital Management LLC +194.0K
Bayview Asset Management, LLC NEW +25.0K

Biggest sellers in Q2 2026

Covalent Partners LLC SOLD OUT −69.0K
Millennium Management LLC SOLD OUT −23.6K

Who is planning to sell?

Notices of proposed sale, last 12 months

$282K

1 notice from 1 person

Shares covered

10.0K

0.06% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Plummer, Michelle M. (GCBC) Director $282K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2017–FY2026

−0.0%

−0.00% a year

Each share's claim on the business

+0.0%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$663K vs —

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years67% 3–5 years14% 1–3 years14% Under 1 year6%

Quarterly turnover

11.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting GCBC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	667.7K	3.92%	−10.5K (−1.6%)	≤2021	0.0%
Shares held by quarter Peak holding695.0K (Q3'25) Change over 8 quarters+242.0K Share of the company3.920% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	492.1K	2.89%	+194.0K (+65.1%)	≤2021	0.0%
Shares held by quarter Peak holding492.1K (Q2'26) Change over 8 quarters+492.1K Share of the company2.890% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

667.7K

% of company

3.92%

Change vs last qtr

−10.5K (−1.6%)

Held since

≤2021

Vanguard Capital Management LLC

492.1K

% of company

2.89%

Change vs last qtr

+194.0K (+65.1%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Greene County Bancorp Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting GCBC on Form N-PORT; together they hold 7.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$13.2M	391.5K	2.30%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$6.4M	190.6K	1.12%	0.01%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$13.2M

% of company

2.30%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$6.4M

% of company

1.12%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Greene County Bancorp Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
GD Gibson Donald E Insider	229.1K	1.35%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.350% Gibson Donald E's insider activity →
PM Plummer Michelle M Insider	149.9K	0.88%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.880% Plummer Michelle M's insider activity →

Gibson Donald E

Insider

229.1K

% of company

1.35%

Change vs last qtr

—

Held since

—

Plummer Michelle M

Insider

149.9K

% of company

0.88%

Change vs last qtr

—

Held since

—

7 more holders behind a free account

See every insider and 5%+ holder of Greene County Bancorp Inc.

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