Matthew Allen Walker is Director & 10% Owner at GreenLight Biosciences Holdings, PBC (GRNA). They have made 1 open-market trade across 1 company since 2022, most recently 2023-07-24.
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 $50.2M since 2022, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GRNA | 22,220,572 | $6.7M |
Shares reported on the most recent Form 4, priced at the 2022-08-15 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GRNA | BUY | 2022-08-11 | 2022-08-15 | $3.92 | $50.2M | -17.6% | -56.1% | -55.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.