Plug Power Inc.
Plug Power Inc. (PLUG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PLUG · as of Mar 31, 2025
Ownership Breakdown
466
Institutional Holders
▼ 30 vs Q4
$654.16M
Total Inst. Value
▼ $329.07M vs Q4
1.15B
Shares Outstanding
freeFloat 94.74%
484.77M
13F Shares Held
▲ 24.44M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PLUG largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electrical industrial apparatus | 91.37M | 9.66% | 9.66% | $123.35B | May 9, 2025 | ▲ 3.93M |
BLACKROCK, INC. electrical industrial apparatus | 79.92M | 8.45% | 8.45% | $107.90B | May 2, 2025 | ▲ 625.2K |
NORGES BANK electrical industrial apparatus | 71.79M | 7.59% | 7.59% | $96.91B | May 11, 2026 | ▲ 3.03M |
UBS GROUP AG electrical industrial apparatus | 32.69M | 3.46% | 3.46% | $44.13B | May 13, 2025 | ▲ 17.13M |
HEIGHTS CAPITAL MANAGEMENT, INC electrical industrial apparatus | 23.09M | 2.44% | 2.44% | $31.17B | May 14, 2025 | NEW |
STATE STREET CORP electrical industrial apparatus | 22.18M | 2.35% | 2.35% | $29.95B | May 15, 2025 | ▼ 113.9K |
GEODE CAPITAL MANAGEMENT, LLC electrical industrial apparatus | 20.95M | 2.21% | 2.21% | $28.28B | May 13, 2025 | ▲ 1.03M |
CAPTION MANAGEMENT, LLC electrical industrial apparatus | 12.50M | 1.32% | 1.32% | $16.88B | May 15, 2025 | NEW |
MORGAN STANLEY electrical industrial apparatus | 12.16M | 1.29% | 1.29% | $16.42B | May 15, 2025 | ▼ 5.31M |
LEGAL & GENERAL GROUP PLC electrical industrial apparatus | 10.62M | 1.12% | 1.12% | $14.33B | May 15, 2025 | ▲ 474.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
31
Increased
+60.52M shares2
New Positions
first time holders17
Decreased
−15.28M shares0
Sold Out
fully exitedNet shares change (top 50)
+45.24M
+60.52M / −15.28M
Net new holders
+16
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PLUG insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
8
Buy transactions
1
Sell transactions
8.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Kenausis Gregory director | Apr 1, 2026 | Award | 8,712 | $2.26 | $19.7K | 470.7K | Form 4 ↗ |
Mahtani Kavita director | Apr 1, 2026 | Award | 9,956 | $2.26 | $22.5K | 239.8K | Form 4 ↗ |
Angle Colin M director | Apr 1, 2026 | Award | 3,872 | $2.26 | $8.8K | 109.8K | Form 4 ↗ |
BONNEY MARK J director | Apr 1, 2026 | Award | 10,509 | $2.26 | $23.8K | 223.0K | Form 4 ↗ |
Joggerst Patrick director | Apr 1, 2026 | Award | 8,850 | $2.26 | $20.0K | 205.8K | Form 4 ↗ |
Marsh Andrew director | Apr 1, 2026 | Award | 3,688 | $2.26 | $8.3K | 853.4K | Form 4 ↗ |
Haycraft Benjamin CSO & GM EMEA | Jan 12, 2026 | Sale | 40,000 | $2.17 | $86.8K | 333.8K | Form 4 ↗ |
MCNAMEE GEORGE C director | Jan 2, 2026 | Award | 13,008 | $1.97 | $25.6K | 833.5K | Form 4 ↗ |
Mahtani Kavita director | Jan 2, 2026 | Award | 11,421 | $1.97 | $22.5K | 229.9K | Form 4 ↗ |
Kenausis Gregory director | Jan 2, 2026 | Award | 9,994 | $1.97 | $19.7K | 462.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Plug Power Inc. (PLUG) is primarily owned by institutional investors, who hold approximately 42.3% of total shares outstanding. Company insiders own approximately 5.26%, while retail and public investors account for the remaining 52.47%.
The largest institutional shareholder of Plug Power Inc. is VANGUARD GROUP INC, holding approximately 91.37 million shares — equal to 9.66% of outstanding shares — as of March 31, 2025.
A total of 466 institutional investors currently hold PLUG stock, with a combined institutional value of approximately $654,156,098 as of the most recent 13F filing period.
Frequently asked questions
PLUG ownershipPlug Power Inc. (PLUG) is primarily owned by institutional investors, who hold approximately 42.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.66% stake. Company insiders hold 5.26%. Data sourced from SEC Form 13F as of March 31, 2025.