SEC Form 4 · Updated Daily
PLUG
— PLUG POWER INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| DTE ENERGY CO | 10%+ Owner | 8,054,463 | 2007-12-24 | G |
| MARXE AUSTIN W & GREENHOUSE DAVID M | 10%+ Owner | 6,511,620 | 2013-02-14 | S |
| POTANIN VLADIMIR O | 10%+ Owner | 5,126,939 | 2008-02-08 | P |
| Joint Stock Co INTER RAO UES | 10%+ Owner | 4,462,693 | 2013-09-16 | J |
| JSC INTER RAO Capital | 10%+ Owner | 4,462,693 | 2013-09-16 | J |
| MIDDLETON PAUL B | Officer | 2,947,169 | 2026-06-25 | A |
| NORILSK HOLDINGS SA | 10%+ Owner | 2,714,700 | 2006-04-10 | — |
| MCNAMEE GEORGE C | Director | 873,282 | 2026-06-11 | A |
| Marsh Andrew | Director | 853,378 | 2026-04-01 | A |
| WILLIS GARY K | Director | 730,107 | 2026-06-11 | A |
| FiveT Capital Holding AG | Director | 693,911 | 2020-11-13 | S |
| Kenausis Gregory | Director | 520,340 | 2026-10-01 | A |
| Schmid Keith | Officer | 474,776 | 2023-09-29 | F |
| Schmidt Keith | Officer | 447,638 | 2022-08-19 | F |
| HELMER MAUREEN O | Director | 361,318 | 2026-06-11 | A |
| Crespo Jose Luis | Officer | 307,332 | 2025-12-15 | P |
| BONNEY MARK J | Director | 283,772 | 2026-10-01 | A |
| Hoefelmann Dirk Ole | Officer | 280,064 | 2023-03-03 | F |
| Joggerst Patrick | Director | 264,782 | 2026-10-01 | A |
| Conway Gerard L JR | Officer | 259,482 | 2025-05-05 | F |
| Mahtani Kavita | Director | 239,847 | 2026-04-01 | A |
| Roth Johannes Minho | Director | 234,633 | 2022-07-01 | A |
| GARBERDING LARRY | Director | 197,714 | 2017-04-03 | A |
| Mindnich David | Officer | 185,416 | 2023-09-05 | F |
| Hull Martin Daniel | Officer | 179,873 | 2025-04-06 | F |
| Shrestha Sanjay K | Officer | 160,270 | 2023-09-29 | F |
| Angle Colin M | Director | 159,223 | 2026-10-01 | A |
| Schneider Lucas P | Director | 135,302 | 2023-04-03 | A |
| Anderson Gerald A | Officer | 132,229 | 2010-02-08 | F |
| HICKEY DOUGLAS T | Director | 109,912 | 2018-07-02 | A |
| Corless Adrian J | Officer | 103,729 | 2010-03-25 | P |
| Haycraft Benjamin | Officer | 91,874 | 2026-10-15 | S |
| SPERRY MARK A | Officer | 87,802 | 2010-02-08 | F |
| GRAVES GREGORY B | Director | 83,431 | 2019-05-09 | A |
| Hutchison Thomas M | Officer | 78,000 | 2006-06-28 | — |
| Silver Jonathan M | Director | 75,715 | 2023-07-03 | A |
| Miroshnichenko Evgeny | Director | 62,254 | 2014-07-01 | A |
| GRANT J DOUGLAS | Director | 57,413 | 2009-01-02 | A |
| Hansen Erik J | Officer | 54,633 | 2010-03-25 | P |
| DRAZAN JEFFREY M | Director | 53,508 | 2011-01-10 | A |
| SILVESTRI GREGORY A | Officer | 51,599 | 2007-02-01 | S |
| Rasskazov Evgeny | Director | 51,344 | 2013-07-02 | A |
| Air Liquide Investissements d'Avenir et de Demonstration | Director | 44,179 | 2017-09-15 | A |
| ELTER JOHN F | Officer | 42,820 | 2007-02-01 | S |
| NEUMANN DAVID A | Officer | 35,282 | 2006-02-01 | A |
| Woicke Peter | Director | 33,567 | 2009-01-02 | A |
| Pontone Xavier | Director | 31,161 | 2017-04-03 | A |
| Gross Joel D | Director | 28,396 | 2009-04-02 | A |
| NELSON JEAN M | Officer | 24,000 | 2006-11-27 | A |
| BUA JEAN A | Officer | 22,669 | 2023-07-03 | A |
| Millington Joseph M | Officer | 19,750 | 2008-01-24 | A |
| Greenberg Allan | Officer | 15,000 | 2006-10-30 | A |
| Bucknam Allen K | Officer | 13,968 | 2007-10-22 | S |
| Batekhin Sergey | Director | 12,093 | 2008-10-02 | A |
| McGuire Michael E Jr | Director | 11,816 | 2009-04-02 | A |
| Rosenblum Lisa | Director | 11,394 | 2008-10-02 | A |
| Polikarpov Sergey | Director | 11,180 | 2008-07-02 | A |
| Pivnyuk Dennis V | Director | 9,916 | 2009-04-02 | A |
| Dimitri Andrew | Director | 7,391 | 2009-04-02 | A |
| Harriman Kim | Director | 6,471 | 2022-07-01 | A |
| Johnson Bradley H | Officer | 5,001 | 2008-02-04 | S |
| Powers Robert Patrick | Officer | 2,591 | 2006-06-28 | — |
| AXANE SA | Director | 0 | 2015-08-26 | S |
| OJSC Third Generation Co of the Wholesale Electricity Market | 10%+ Owner | 0 | 2012-09-28 | S |
| MMC NORLISK NICKEL | 10%+ Owner | 0 | 2011-03-22 | J |
| Reid Chris | Officer | 0 | 2007-05-16 | — |
| Branton LTD | 10%+ Owner | 0 | 2008-12-20 | S |
| Clayburn Development Inc. | 10%+ Owner | 0 | 2008-12-20 | S |
| SMART HYDROGEN, INC. | 10%+ Owner | 0 | 2008-12-20 | S |
| PROKHOROV MIKHAIL D | 10%+ Owner | 0 | 2008-04-24 | S |
| WALDEK DAVID P | Reporting Owner | 0 | 2007-02-28 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-15 | Haycraft Benjamin | Open-market sale | 9,375 | $1.41 | 91,874 |
| 2026-10-01 | BONNEY MARK J | Grant / award | 12,242 | $1.94 | 283,772 |
| 2026-10-01 | Joggerst Patrick | Grant / award | 11,598 | $1.94 | 264,782 |
| 2026-10-01 | Kenausis Gregory | Grant / award | 5,928 | $1.94 | 520,340 |
| 2026-10-01 | Angle Colin M | Grant / award | 6,121 | $1.94 | 159,223 |
| 2026-09-30 | Marsh Andrew | Grant / award (derivative) | 101,699 | $0.00 | 101,699 |
| 2026-09-18 | Haycraft Benjamin | Open-market sale | 200,000 | $2.14 | 101,249 |
| 2026-09-15 | Haycraft Benjamin | Open-market sale | 18,750 | $2.06 | 301,249 |
| 2026-09-11 | Haycraft Benjamin | Open-market sale | 13,810 | $2.14 | 319,999 |
| 2026-07-01 | Angle Colin M | Grant / award | 3,558 | $2.71 | 153,102 |
| 2026-07-01 | BONNEY MARK J | Grant / award | 8,764 | $2.71 | 271,530 |
| 2026-07-01 | Joggerst Patrick | Grant / award | 7,644 | $2.71 | 253,184 |
| 2026-07-01 | Kenausis Gregory | Grant / award | 3,980 | $2.71 | 514,412 |
| 2026-06-30 | Marsh Andrew | Grant / award (derivative) | 72,469 | $0.00 | 72,469 |
| 2026-06-25 | Crespo Jose Luis | Grant / award (derivative) | 777,202 | $0.00 | 777,202 |
| 2026-06-25 | Crespo Jose Luis | Grant / award (derivative) | 765,306 | $0.00 | 765,306 |
| 2026-06-25 | Fullerton Dean | Grant / award (derivative) | 414,508 | $0.00 | 414,508 |
| 2026-06-25 | Fullerton Dean | Grant / award (derivative) | 408,163 | $0.00 | 408,163 |
| 2026-06-25 | Conway Gerard L JR | Grant / award (derivative) | 362,694 | $0.00 | 362,694 |
| 2026-06-25 | Conway Gerard L JR | Grant / award (derivative) | 357,143 | $0.00 | 357,143 |
| 2026-06-25 | MIDDLETON PAUL B | Grant / award (derivative) | 510,204 | $0.00 | 510,204 |
| 2026-06-25 | MIDDLETON PAUL B | Grant / award | 389,105 | $0.00 | 2,947,169 |
| 2026-06-25 | Haycraft Benjamin | Grant / award (derivative) | 362,694 | $0.00 | 362,694 |
| 2026-06-25 | Haycraft Benjamin | Grant / award (derivative) | 357,143 | $0.00 | 357,143 |
| 2026-06-11 | Angle Colin M | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | Angle Colin M | Grant / award | 39,753 | $0.00 | 149,544 |
| 2026-06-11 | BONNEY MARK J | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | BONNEY MARK J | Grant / award | 39,753 | $0.00 | 262,766 |
| 2026-06-11 | HELMER MAUREEN O | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | HELMER MAUREEN O | Grant / award | 39,753 | $0.00 | 361,318 |
| 2026-06-11 | Joggerst Patrick | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | Joggerst Patrick | Grant / award | 39,753 | $0.00 | 245,540 |
| 2026-06-11 | Kenausis Gregory | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | Kenausis Gregory | Grant / award | 39,753 | $0.00 | 510,432 |
| 2026-06-11 | MCNAMEE GEORGE C | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | MCNAMEE GEORGE C | Grant / award | 39,753 | $0.00 | 873,282 |
| 2026-06-11 | WILLIS GARY K | Grant / award (derivative) | 39,753 | $0.00 | 39,753 |
| 2026-06-11 | WILLIS GARY K | Grant / award | 39,753 | $0.00 | 730,107 |
| 2026-06-08 | HELMER MAUREEN O | Open-market sale | 50,000 | $3.23 | 321,565 |
| 2026-04-01 | Marsh Andrew | Grant / award | 3,688 | $2.26 | 853,378 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.