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 Sep 30, 2025
Ownership Breakdown
498
Institutional Holders
▲ 43 vs Q2
$1.25B
Total Inst. Value
▲ $606.44M vs Q2
1.15B
Shares Outstanding
freeFloat 94.74%
533.67M
13F Shares Held
▲ 104.25M vs Q2
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
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electrical industrial apparatus | 109.63M | 9.73% | 9.73% | $255.44B | Nov 7, 2025 | ▲ 7.79M |
BLACKROCK, INC. electrical industrial apparatus | 99.59M | 8.84% | 8.84% | $232.04B | Nov 12, 2025 | ▲ 16.07M |
GEODE CAPITAL MANAGEMENT, LLC electrical industrial apparatus | 27.81M | 2.47% | 2.47% | $64.81B | Nov 12, 2025 | ▲ 3.74M |
STATE STREET CORP electrical industrial apparatus | 24.84M | 2.20% | 2.20% | $57.88B | Nov 14, 2025 | ▲ 4.44M |
GOLDMAN SACHS GROUP INC electrical industrial apparatus | 24.16M | 2.14% | 2.14% | $56.29B | Nov 14, 2025 | ▲ 19.00M |
UBS GROUP AG electrical industrial apparatus | 23.28M | 2.07% | 2.07% | $54.25B | Nov 13, 2025 | ▲ 11.50M |
LEGAL & GENERAL GROUP PLC electrical industrial apparatus | 17.70M | 1.57% | 1.57% | $41.23B | Nov 13, 2025 | ▲ 714.2K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP electrical industrial apparatus | 15.24M | 1.35% | 1.35% | $35.50B | Nov 14, 2025 | ▲ 9.26M |
D. E. SHAW & CO., INC. electrical industrial apparatus | 12.88M | 1.14% | 1.14% | $30.01B | Nov 14, 2025 | ▲ 3.83M |
TWO SIGMA INVESTMENTS, LP electrical industrial apparatus | 10.83M | 96.14% | 96.14% | $25.24B | Nov 14, 2025 | ▲ 8.07M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
37
Increased
+128.84M shares3
New Positions
first time holders8
Decreased
−8.57M shares0
Sold Out
fully exitedNet shares change (top 50)
+120.27M
+128.84M / −8.57M
Net new holders
+32
3 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 46.5% of total shares outstanding. Company insiders own approximately 5.26%, while retail and public investors account for the remaining 48.21%.
The largest institutional shareholder of Plug Power Inc. is VANGUARD GROUP INC, holding approximately 109.63 million shares — equal to 9.73% of outstanding shares — as of September 30, 2025.
A total of 498 institutional investors currently hold PLUG stock, with a combined institutional value of approximately $1.25 billion 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 46.5% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.73% stake. Company insiders hold 5.26%. Data sourced from SEC Form 13F as of September 30, 2025.