Form 4: Adaptive Biotechnologies Executive Sells Shares
Insider Transaction (Form 4)
Harlan S Robins, Chief Scientific Officer of Adaptive Biotechnologies Corp, sold 492,400 shares of common stock on July 21, 2026.
Summary
- Option exercise/conversion: acquired 284,800 Common Stock at $6.55 ($1,865,440) on July 21, 2026; holds 1,304,458 after (Direct).
- Open-market sale: disposed of 278,698 Common Stock at $21.72 ($6,053,321) on July 21, 2026; holds 1,025,760 after (Direct).
- Open-market sale: disposed of 213,702 Common Stock at $22.12 ($4,727,088) on July 21, 2026; holds 812,058 after (Direct).
- Option exercise/conversion: disposed of 284,800 Stock Option (right to buy) on July 21, 2026 (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $10,780,409 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Harlan S Robins — Officer (Chief Scientific Officer)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-07-21 | Option exercise/conversion | Common Stock | 284,800 | $7 | $1.9M | 1,304,458 |
| 2026-07-21 | Open-market sale | Common Stock | 278,698 | $22 | $6.1M | 1,025,760 |
| 2026-07-21 | Open-market sale | Common Stock | 213,702 | $22 | $4.7M | 812,058 |
| 2026-07-21 | Option exercise/conversion | Stock Option (right to buy) | 284,800 | — | — | 0 |
Key Dates
| Date | Description |
|---|---|
| 2026-07-21 | Option exercise/conversion (284,800 shares) |
| 2026-07-21 | Open-market sale (278,698 shares) |
| 2026-07-21 | Open-market sale (213,702 shares) |
| 2026-07-21 | Option exercise/conversion (284,800 shares) |
Keywords
insider transaction, Form 4, ADPT, Adaptive Biotechnologies Corp, bearish, Harlan S Robins
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