Harlan S. Robins is CSO at Adaptive Biotechnologies Corp (ADPT). They have made 33 open-market trades across 1 company since 2020, most recently 2026-07-21.
CIK 0001780851
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 33 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ADPT | 812,058 | $19.5M |
Shares reported on the most recent Form 4, priced at the 2026-07-23 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 | 2026-07-21 | 2026-07-23 | $21.89 | $10.8M | +9.1% | +13.7% | — |
| ADPT | SELL · 10b5-1 | 2026-07-02 | 2026-07-07 | $22.01 | $8.5M | +13.5% | +16.8% | +47.8% |
| ADPT | SELL · 10b5-1 | 2026-06-15 | 2026-06-17 | $17.41 | $1.8M | +24.4% | +33.1% | +54.7% |
| ADPT | SELL · 10b5-1 | 2026-04-08 | 2026-04-10 | $14.85 | $149K | +10.7% | +5.4% | +70.1% |
| ADPT | SELL | 2026-03-11 | 2026-03-13 | $13.17 | $6.2M | +5.5% | +5.4% | +39.6% |
| ADPT | SELL | 2026-03-02 | 2026-03-04 | $16.19 | $392K | -17.8% | -13.1% | -6.5% |
| ADPT | SELL | 2026-02-02 | 2026-02-04 | $18.68 | $799K | -8.0% | -13.5% | -19.6% |
| ADPT | SELL · 10b5-1 | 2026-01-06 | 2026-01-08 | $16.44 | $164K | +9.7% | -0.9% | -7.3% |
| ADPT | SELL · 10b5-1 | 2025-12-03 | 2025-12-05 | $18.30 | $1.2M | +9.6% | +9.9% | +8.3% |
| ADPT | SELL · 10b5-1 | 2025-11-10 | 2025-11-12 | $14.82 | $148K | +44.3% | +8.9% | +10.3% |
| ADPT | SELL · 10b5-1 | 2025-05-01 | 2025-05-05 | $7.35 | $1.0M | -10.9% | -0.2% | +9.1% |
| ADPT | SELL · 10b5-1 | 2025-03-24 | 2025-03-26 | $9.00 | $15K | -5.7% | -3.3% | +30.4% |
| ADPT | SELL | 2025-03-05 | 2025-03-06 | $6.99 | $1.4M | -4.3% | +0.3% | +29.9% |
| ADPT | SELL | 2022-03-07 | 2022-03-08 | $12.01 | $108K | +5.6% | +8.7% | -43.9% |
| ADPT | SELL | 2021-11-17 | 2021-11-19 | $32.02 | $247K | -4.2% | +1.5% | -47.8% |
| ADPT | SELL | 2021-10-19 | 2021-10-21 | $33.72 | $502K | +1.1% | -22.9% | -48.7% |
| ADPT | SELL | 2021-10-06 | 2021-10-08 | $32.95 | $764K | +4.8% | +12.7% | -27.6% |
| ADPT | SELL | 2021-09-13 | 2021-09-15 | $36.90 | $755K | -2.1% | -8.5% | -27.4% |
| ADPT | SELL | 2021-08-25 | 2021-08-27 | $34.25 | $768K | +9.2% | +2.0% | -19.9% |
| ADPT | SELL | 2021-07-19 | 2021-07-21 | $37.58 | $729K | -3.9% | -20.3% | -11.5% |
| ADPT | SELL | 2021-06-09 | 2021-06-11 | $37.36 | $813K | +6.2% | -1.9% | -0.5% |
| ADPT | SELL · 10b5-1 | 2021-05-05 | 2021-05-07 | $35.43 | $113K | -0.7% | +8.6% | +8.4% |
| ADPT | SELL | 2021-05-05 | 2021-06-11 | $35.52 | $523K | +6.2% | -1.9% | -0.5% |
| ADPT | SELL | 2021-05-04 | 2021-05-06 | $36.07 | $256K | -3.5% | +3.4% | +2.3% |
| ADPT | SELL | 2021-04-20 | 2021-04-22 | $41.44 | $1.7M | -16.1% | -15.3% | -11.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.