Plug Power's three largest insider shareholders as of September 29, 2026 are Paul B Middleton (Cfo Executive Vp, 2.95Mn shares), George C Mcnamee (Director, 873.28K shares), Andrew Marsh (Ceo, 853.38K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Paul B Middleton | Cfo Executive Vp | 2,947,169 | 0 | 2,947,169 | 31.2% | 29 Jun, 2026 |
| 2 | George C Mcnamee | Director | 873,282 | 0 | 873,282 | 9.3% | 16 Jun, 2026 |
| 3 | Andrew Marsh | Ceo | 853,378 | 0 | 853,378 | 9.0% | 10 Apr, 2026 |
| 4 | Gary K Willis | Director | 730,107 | 0 | 730,107 | 7.7% | 16 Jun, 2026 |
| 5 | Gregory Kenausis | Director | 514,412 | 0 | 514,412 | 5.5% | 06 Jul, 2026 |
| 6 | Keith Schmid | Gm New Mkts Pres New Prd Dv | 474,776 | 0 | 474,776 | 5.0% | 03 Oct, 2023 |
| 7 | Maureen O Helmer | Director | 361,318 | 0 | 361,318 | 3.8% | 16 Jun, 2026 |
| 8 | Jose Luis Crespo | Chief Revenue Officer | 307,332 | 0 | 307,332 | 3.3% | 17 Dec, 2025 |
| 9 | Dirk Ole Hoefelmann | Gm, Electrolyzers Exec Vp | 280,064 | 0 | 280,064 | 3.0% | 13 Apr, 2023 |
| 10 | Mark J Bonney | Director | 271,530 | 0 | 271,530 | 2.9% | 06 Jul, 2026 |
| 11 | Gerard L Jr Conway | Gen. Coun, Corp Sec., Exec. Vp | 259,482 | 0 | 259,482 | 2.8% | 07 May, 2025 |
| 12 | Patrick Joggerst | Director | 253,184 | 0 | 253,184 | 2.7% | 06 Jul, 2026 |
| 13 | Kavita Mahtani | Director | 239,847 | 0 | 239,847 | 2.5% | 10 Apr, 2026 |
| 14 | Johannes Minho Roth | Director | 234,633 | 0 | 234,633 | 2.5% | 15 Jul, 2022 |
| 15 | Martin Daniel Hull | Corporate Controller And Cao | 179,873 | 0 | 179,873 | 1.9% | 07 May, 2025 |
| 16 | Sanjay K Shrestha | Cso Gm, Energy Solutions | 160,270 | 0 | 160,270 | 1.7% | 03 Oct, 2023 |
| 17 | Colin M Angle | Director | 153,102 | 0 | 153,102 | 1.6% | 06 Jul, 2026 |
| 18 | Lucas P Schneider | Director | 135,302 | 0 | 135,302 | 1.4% | 05 Apr, 2023 |
| 19 | Benjamin Haycraft | Cso Gm Emea | 101,249 | 0 | 101,249 | 1.1% | 22 Sep, 2026 |
| 20 | Jonathan M Silver | Director | 75,715 | 0 | 75,715 | 0.8% | 06 Jul, 2023 |
| 21 | Jean A Bua | Director | 22,669 | 0 | 22,669 | 0.2% | 06 Jul, 2023 |
| 22 | Kim Harriman | Director | 6,471 | 0 | 6,471 | 0.1% | 15 Jul, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 18 Sep, 2026 | Benjamin Haycraft | Cso Gm Emea | Disposed S | 200,000 | $2.14 | $428.30K | 101,249 | Direct |
| 25 Jun, 2026 | Benjamin Haycraft | Cso Gm Emea | Acquired A | 357,143 | $0.00 | $0 | 357,143 | Direct |
| 01 Jul, 2026 | Gregory Kenausis | Director | Acquired A | 3,980 | $2.71 | $10.79K | 514,412 | Direct |
| 01 Jul, 2026 | Mark J Bonney | Director | Acquired A | 8,764 | $2.71 | $23.75K | 271,530 | Direct |
| 01 Jul, 2026 | Patrick Joggerst | Director | Acquired A | 7,644 | $2.71 | $20.72K | 253,184 | Direct |
| 01 Jul, 2026 | Colin M Angle | Director | Acquired A | 3,558 | $2.71 | $9.64K | 153,102 | Direct |
| 25 Jun, 2026 | Benjamin Haycraft | Cso Gm Emea | Acquired A | 362,694 | $0.00 | $0 | 362,694 | Direct |
| 30 Jun, 2026 | Andrew Marsh | Director | Acquired A | 72,469 | $0.00 | $0 | 72,469 | Direct |
| 25 Jun, 2026 | Jose Luis Crespo | Officer | Acquired A | 765,306 | $0.00 | $0 | 765,306 | Direct |
| 25 Jun, 2026 | Paul B Middleton | Cfo Executive Vp | Acquired A | 389,105 | $0.00 | $0 | 2,947,169 | Direct |
| 25 Jun, 2026 | Dean Fullerton | Chief Operating Officer | Acquired A | 408,163 | $0.00 | $0 | 408,163 | Direct |
| 25 Jun, 2026 | Gerard L Jr Conway | Gen. Coun, Corp Sec., Exec. Vp | Acquired A | 357,143 | $0.00 | $0 | 357,143 | Direct |
| 25 Jun, 2026 | Jose Luis Crespo | Officer | Acquired A | 777,202 | $0.00 | $0 | 777,202 | Direct |
| 25 Jun, 2026 | Gerard L Jr Conway | Gen. Coun, Corp Sec., Exec. Vp | Acquired A | 362,694 | $0.00 | $0 | 362,694 | Direct |
| 25 Jun, 2026 | Dean Fullerton | Chief Operating Officer | Acquired A | 414,508 | $0.00 | $0 | 414,508 | Direct |
| 25 Jun, 2026 | Paul B Middleton | Cfo Executive Vp | Acquired A | 510,204 | $0.00 | $0 | 510,204 | Direct |
| 11 Jun, 2026 | Gregory Kenausis | Director | Acquired A | 39,753 | $0.00 | $0 | 510,432 | Direct |
| 11 Jun, 2026 | George C Mcnamee | Director | Acquired A | 39,753 | $0.00 | $0 | 873,282 | Direct |
| 11 Jun, 2026 | Colin M Angle | Director | Acquired A | 39,753 | $0.00 | $0 | 149,544 | Direct |
| 11 Jun, 2026 | Maureen O Helmer | Director | Acquired A | 39,753 | $0.00 | $0 | 361,318 | Direct |