Michelle Renee Griffin is Director at Adaptive Biotechnologies Corp (ADPT). They have made 15 open-market trades across 1 company since 2020, most recently 2026-06-25.
CIK 0001229765
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.
0 open-market purchases, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ADPT | 15,625 | $375K |
| KDNY | 3,300 | $133K |
| HTGM | 2,500 | $1K |
| Total | $510K |
Shares reported on the most recent Form 4, priced at the 2026-06-29 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ADPT | SELL · 10b5-1 | 2026-06-25 | 2026-06-29 | $20.18 | $1.1M | -2.0% | +5.1% | +32.6% |
| ADPT | SELL | 2026-03-11 | 2026-03-13 | $13.91 | $214K | +5.5% | +5.4% | +39.6% |
| ADPT | SELL | 2026-03-03 | 2026-03-05 | $15.30 | $735K | -13.5% | -9.0% | +3.2% |
| ADPT | SELL | 2025-03-13 | 2025-03-17 | $7.19 | $522K | +10.5% | +0.7% | +38.3% |
| ADPT | SELL · 10b5-1 | 2025-03-06 | 2025-03-06 | $7.94 | $249K | -4.3% | +0.3% | +29.9% |
| ADPT | SELL · 10b5-1 | 2023-03-27 | 2023-03-29 | $8.49 | $20K | -4.2% | -16.3% | -20.3% |
| ADPT | SELL | 2021-08-27 | 2021-08-30 | $35.00 | $522K | +6.7% | -9.2% | -25.4% |
| ADPT | SELL | 2021-07-14 | 2021-07-19 | $36.80 | $92K | -0.6% | -16.6% | -13.1% |
| ADPT | SELL | 2021-06-17 | 2021-06-21 | $40.00 | $160K | -0.0% | -4.3% | -5.4% |
| ADPT | SELL | 2021-06-14 | 2021-06-16 | $38.56 | $96K | +13.1% | -2.0% | -3.3% |
| ADPT | SELL | 2021-05-18 | 2021-05-19 | $35.00 | $88K | +5.3% | +13.4% | -12.0% |
| ADPT | SELL | 2021-04-14 | 2021-04-16 | $43.41 | $391K | +5.2% | -16.6% | -14.6% |
| ADPT | SELL | 2021-03-15 | 2021-03-17 | $42.62 | $410K | -18.2% | -7.7% | -15.7% |
| ADPT | SELL | 2021-02-16 | 2021-02-16 | $65.08 | $390K | -10.1% | -33.8% | -45.3% |
| ADPT | SELL | 2021-01-14 | 2021-01-15 | $65.88 | $791K | -17.0% | -6.7% | -37.5% |
| ADPT | SELL | 2020-12-14 | 2020-12-16 | $58.84 | $706K | +4.8% | +14.9% | -21.8% |
| ADPT | SELL | 2020-11-16 | 2020-11-18 | $47.63 | $525K | +0.1% | +21.9% | +31.4% |
| ADPT | SELL | 2020-10-14 | 2020-10-16 | $52.84 | $1.3M | -0.5% | -8.9% | +28.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.