Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

PLUG POWER INC

CIK 0001093691PLUG· quarter ending 2026-06-30

Shares outstanding

1,397,195,278

as of 2026-08-06 · 10-Q cover page, filed 2026-08-10

Held by 13F filers

2,003,875

selection includes debt or preferreds — no % of shares outstanding

Holders

+0 vs 2026-03-31 · 0 new, 0 exited

Value

$7.9M

shares -20.0% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-10, as of 2026-08-06)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	PLUG · NASDAQ	1,397,195,278	814,777,711	58.3%	512	72919P202

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
72919P202	COM NEW	512	814,777,711	1,397,195,278	58.3%	$2.2B	22 call / 12 put	13DG	holders →
72919PAG8	FIXED INCOMEnot common	2	$2.0M principal	—	—	$7.9M	—	NPORT	holders →
72919P103	COMMON STOCKnot common	1	1	—	—	$0	—	prefix	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 3 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (2 of 2 · 72919PAG8)

change vs 2026-03-31

#	Filer	Shares / principal	% of class	Value	Change
1	Skaana Management L.P.	2,000,000	—	$2.7M	-500,000 (-20.0%)
2	K2 PRINCIPAL FUND, L.P.	3,875	—	$5.2M	—

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
BlackRock, Inc.	SCHEDULE 13G/A	2026-07-29	2026-06-30	178,091,159	12.8%
Vanguard Capital Management	SCHEDULE 13G	2026-04-30	2026-03-31	73,043,212	5.23%
The Vanguard Group	SCHEDULE 13G/A	2026-03-27	2026-03-13	0	0%
Norges Bank	SCHEDULE 13G/A	2025-07-24	2025-06-30	5,006,031	0.4%
Grove Energy Capital LLC	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%
PassKey, Inc.	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%
Plutus Capital NY, Inc.	SCHEDULE 13D/A	2025-06-25	2025-06-06	0	4.8%
PNES Investments, LLC	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%
PRISM Energy International Americas, Inc. (formerly known as SK E&S Americas, Inc.)	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%
SK Inc. (formerly known as SK Holdings Co., Ltd.)	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%
SK Innovation Co., Ltd.	SCHEDULE 13D/A	2025-06-25	2025-06-06	54,966,188	4.8%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.