$PLUG

$1.37 -$0.01 (0.72%) Close

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

Ownership

13F as of Q2 2026 · 1.4B shares outstanding

Who owns PLUG?

By type of holder

Institutions 57.9% Insiders 0.7% Everyone else 41.4%

Concentration Top 10 holders own 38.1%

BlackRock, Inc. 13.2% · Vanguard Portfolio Management LLC 4.7%

Institutional ownership

57.9%

+3.9 pts vs last qtr

Institutional holders

507

+38 vs last qtr

Net shares bought

+55.0M

by institutions in Q2 2026

New / sold out

89 / 51

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +31.9M
Citadel Advisors LLC +23.3M

Biggest sellers in Q2 2026

D. E. Shaw & Co., Inc. −27.0M
Renaissance Technologies LLC −16.0M

Who is planning to sell?

Notices of proposed sale, last 12 months

$1.22M

11 notices from 5 people

Shares covered

536.9K

0.04% of the company

Arranged in advance

80%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Haycraft Benjamin Officer 10b5-1 $714K
Maureen Helmer Director 10b5-1 $161K

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, FY2018–FY2025

+423.9%

+26.69% a year

Each share's claim on the business

−80.9%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $589M

over 8 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+ years78% 3–5 years1% 1–3 years13% Under 1 year9%

Quarterly turnover

16.3%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting PLUG on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	184.0M	13.17%	+31.9M (+21.0%)	≤2021	0.0%
Shares held by quarter Peak holding184.0M (Q2'26) Change over 8 quarters+108.3M Share of the company13.170% BlackRock, Inc.'s full portfolio →
VP Vanguard Portfolio Management LLC	66.2M	4.74%	+6.6M (+11.0%)	≤2021	0.0%
Shares held by quarter Peak holding66.2M (Q2'26) Change over 8 quarters+66.2M Share of the company4.740% Vanguard Portfolio Management LLC's full portfolio →

BlackRock, Inc.

184.0M

% of company

13.17%

Change vs last qtr

+31.9M (+21.0%)

Held since

≤2021

Vanguard Portfolio Management LLC

66.2M

% of company

4.74%

Change vs last qtr

+6.6M (+11.0%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Plug Power Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting PLUG on Form N-PORT; together they hold 24.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$120M	44.4M	3.18%	0.01%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$96.6M	35.6M	2.55%	0.12%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$120M

% of company

3.18%

% of the fund

0.01%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$96.6M

% of company

2.55%

% of the fund

0.12%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Plug Power 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
GE Grove Energy Capital LLC 5%+ holder 13D · 4.8%	55.0M	3.93%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company3.930% Disclosed stake13D · 4.8% View the 13D/G filing →
MP Middleton Paul B Insider	3.0M	0.22%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.220% Middleton Paul B's insider activity →

Grove Energy Capital LLC

5%+ holder13D · 4.8%

55.0M

% of company

3.93%

Change vs last qtr

—

Held since

—

Middleton Paul B

Insider

3.0M

% of company

0.22%

Change vs last qtr

—

Held since

—

13 more holders behind a free account

See every insider and 5%+ holder of Plug Power Inc..

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