Gary K. Willis is Director at PLUG POWER INC (PLUG). They have made 6 open-market trades across 4 companies since 2007, most recently 2026-06-11.
CIK 0001121475
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $76K since 2007, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PLUG | SELL | 2020-12-11 | 2020-12-15 | $26.86 | $2.4M | +17.6% | +133.1% | +62.7% |
| ZIGO | SELL | 2012-08-29 | 2012-08-31 | $19.83 | $991K | N/A | N/A | N/A |
| RSTI | SELL | 2010-11-15 | 2010-11-15 | $28.73 | $86K | N/A | N/A | N/A |
| RSTI | SELL | 2008-02-13 | 2008-02-13 | $41.63 | $291K | N/A | N/A | N/A |
| RSTI | SELL | 2008-02-12 | 2008-02-12 | $40.45 | $364K | N/A | N/A | N/A |
| VION | BUY | 2007-03-07 | 2007-03-09 | $1.52 | $76K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.