Plug Power Inc.
A maker of hydrogen fuel cells and electrolyzers, Plug Power builds systems that turn water into hydrogen and hydrogen into electricity. Its GenDrive fuel cells power the warehouse forklift fleets of Amazon and Walmart, and it runs green hydrogen production plants. Founded in 1997 as a joint venture between Detroit's DTE Energy and engineering firm Mechanical Technology Inc., it got its name from the idea of a 'plug-and-play' replacement for batteries — and its branding celebrates the 'power of two,' hydrogen's two atoms.
Granted 1.81M · Bought 1.00M
Granted 302.2K · Sold 30.0K
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Granted 119.1K · Bought 37.3K · Sold 69.3K
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| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Middleton Paul BCFO & Executive VP · 13 transactions | — | 3.01M | 1.81M | 1.00M | — |
| McNamee George CDirector · 27 transactions | +29.7% | 1.17M | 302.2K | — | 30.0K |
| Marsh AndrewDirector · 12 transactions | — | 975.3K | 156.7K | — | — |
| Willis Gary KDirector · 23 transactions | +75.4% | 730.1K | 313.8K | — | — |
| Schmid KeithGM New Mkts & Pres New Prd Dv · 6 transactions | — | 521.0Kas of Oct 2023 | 100.0K | — | — |
| Kenausis GregoryDirector · 29 transactions | +440.5% | 510.4K | 416.0K | — | — |
| Schmidt KeithGM New Mkts & Pres New Prd Dv · 2 transactions | — | 462.8Kas of Dec 2022 | — | — | — |
| Crespo Jose LuisSee Remarks · 10 transactions | — | 419.4K | 119.1K | 37.3K | 69.3K |
| Mindnich DavidEVP, Global Manufacturing · 1 transaction | — | 406.5Kas of Jan 2024 | — | — | — |
| Helmer Maureen ODirector · 24 transactions | +204.3% | 361.3K | 292.6K | — | 50.0K |
| Conway Gerard L JRGen. Coun, Corp Sec., Exec. VP · 9 transactions | — | 342.1Kas of May 2025 | 119.1K | — | — |
| Haycraft BenjaminCSO & GM EMEA · 7 transactions | — | 333.8K | — | — | 111.0K |
| Hoefelmann Dirk OleGM, Electrolyzers & Exec VP · 2 transactions | — | 281.6Kas of Apr 2023 | — | — | — |
| Bonney Mark JDirector · 14 transactions | — | 262.8K | 262.8K | — | — |
| Joggerst PatrickDirector · 14 transactions | — | 245.5K | 245.5K | — | — |
| Mahtani KavitaDirector · 20 transactions | — | 239.8K | 239.8K | — | — |
| Roth Johannes MinhoDirector · 4 transactions | +0.9% | 234.6Kas of Jul 2022 | 2.1K | — | — |
| Hull Martin DanielCorporate Controller and CAO · 15 transactions | — | 226.0Kas of May 2025 | 187.5K | — | — |
| Shrestha Sanjay KCSO & GM, Energy Solutions · 4 transactions | — | 168.2Kas of Oct 2023 | — | — | — |
| Angle Colin MDirector · 9 transactions | — | 149.5K | 149.5K | — | — |
| Schneider Lucas PDirector · 8 transactions | +7.9% | 135.3Kas of Apr 2023 | 10.0K | — | — |
| Silver Jonathan MDirector · 10 transactions | +56.8% | 75.7Kas of Jul 2023 | 27.4K | — | — |
| Bua Jean ADirector · 7 transactions | — | 22.7Kas of Jul 2023 | 22.7K | — | — |
| Harriman KimDirector · 4 transactions | +32.7% | 6.5Kas of Jul 2022 | 1.6K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 5 years: +777.1K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.