PLUG's three largest insider shareholders as of March 23, 2026 are Paul B Middleton (See Remarks, 2.56Mn shares), Andrew Marsh (Ceo, 930.55K shares), George C Mcnamee (Director, 833.53K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul B Middleton | See Remarks | 2,558,064 | 0 | 09 Jun, 2025 |
| Andrew Marsh | Ceo | 930,546 | 0 | 03 Dec, 2025 |
| George C Mcnamee | 833,529 | 0 | 06 Jan, 2026 | |
| Gary K Willis | 690,354 | 0 | 06 Jan, 2026 | |
| Keith Schmid | Gm New Mkts Pres New Prd Dv | 474,776 | 0 | 03 Oct, 2023 |
| Gregory Kenausis | 461,967 | 0 | 06 Jan, 2026 | |
| Maureen O Helmer | 371,565 | 0 | 06 Jan, 2026 | |
| Benjamin Haycraft | Cso Gm Emea | 333,809 | 0 | 14 Jan, 2026 |
| Jose Luis Crespo | See Remarks | 307,332 | 0 | 17 Dec, 2025 |
| Dirk Ole Hoefelmann | Gm, Electrolyzers Exec Vp | 280,064 | 0 | 13 Apr, 2023 |
| Gerard L Jr Conway | Gen. Coun, Corp Sec., Exec. Vp | 259,482 | 0 | 07 May, 2025 |
| Johannes Minho Roth | 234,633 | 0 | 15 Jul, 2022 | |
| Kavita Mahtani | 229,891 | 0 | 06 Jan, 2026 | |
| Mark J Bonney | 212,504 | 0 | 06 Jan, 2026 | |
| Patrick Joggerst | 196,937 | 0 | 06 Jan, 2026 | |
| Martin Daniel Hull | Corporate Controller And Cao | 179,873 | 0 | 07 May, 2025 |
| Sanjay K Shrestha | Cso Gm, Energy Solutions | 160,270 | 0 | 03 Oct, 2023 |
| Lucas P Schneider | 135,302 | 0 | 05 Apr, 2023 | |
| Colin M Angle | 105,919 | 0 | 06 Jan, 2026 | |
| Jonathan M Silver | 75,715 | 0 | 06 Jul, 2023 | |
| Jean A Bua | 22,669 | 0 | 06 Jul, 2023 | |
| Kim Harriman | 6,471 | 0 | 15 Jul, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 12 Jan, 2026 | Benjamin Haycraft | Common Stock | D | 40,000 | $2.17 | 333,809 | D | S |
| 02 Jan, 2026 | Gary K Willis | Common Stock | A | 16,497 | $1.97 | 690,354 | D | A |
| 02 Jan, 2026 | Mark J Bonney | Common Stock | A | 12,056 | $1.97 | 212,504 | D | A |
| 02 Jan, 2026 | Kavita Mahtani | Common Stock | A | 11,421 | $1.97 | 229,891 | D | A |
| 02 Jan, 2026 | Gregory Kenausis | Common Stock | A | 9,994 | $1.97 | 461,967 | D | A |
| 02 Jan, 2026 | George C Mcnamee | Common Stock | A | 13,008 | $1.97 | 833,529 | D | A |
| 02 Jan, 2026 | Patrick Joggerst | Common Stock | A | 10,152 | $1.97 | 196,937 | D | A |
| 02 Jan, 2026 | Colin M Angle | Common Stock | A | 5,076 | $1.97 | 105,919 | D | A |
| 02 Jan, 2026 | Maureen O Helmer | Common Stock | A | 13,959 | $1.97 | 371,565 | D | A |
| 15 Dec, 2025 | Jose Luis Crespo | Common Stock | A | 37,300 | $2.34 | 307,332 | D | P |
| 10 Oct, 2025 | Benjamin Haycraft | Common Stock | D | 10,000 | $3.80 | 457,583 | D | S |
| 17 Oct, 2025 | Benjamin Haycraft | Common Stock | D | 7,817 | $3.48 | 449,766 | D | F |
| 07 Nov, 2025 | Benjamin Haycraft | Common Stock | D | 35,957 | $2.51 | 413,809 | D | F |
| 10 Dec, 2025 | Benjamin Haycraft | Common Stock | D | 40,000 | $2.20 | 373,809 | D | S |
| 28 Nov, 2025 | Andrew Marsh | Common Stock | A | 12,203 | $2.01 | 930,546 | D | A |
| 10 Nov, 2025 | Benjamin Haycraft | Common Stock | D | 10,000 | $2.92 | 467,583 | D | S |
| 31 Oct, 2025 | Andrew Marsh | Common Stock | A | 9,415 | $2.69 | 918,343 | D | A |
| 03 Oct, 2025 | Andrew Marsh | Common Stock | A | 18,324 | $3.81 | 908,928 | D | A |
| 01 Oct, 2025 | Maureen O Helmer | Common Stock | A | 11,803 | $2.33 | 357,606 | D | A |
| 01 Oct, 2025 | George C Mcnamee | Common Stock | A | 10,998 | $2.33 | 820,521 | D | A |