Form 4: Adaptive Biotechnologies COO Sells Shares
Insider Transaction (Form 4)
Julie Rubinstein, President and COO of Adaptive Biotechnologies Corp, sold 35,643 shares of common stock on October 6, 2026.
Summary
- Option exercise/conversion: acquired 11,881 Common Stock at $12.14 ($144,235) on October 6, 2026; holds 389,683 after (Direct).
- Open-market sale: disposed of 9,381 Common Stock at $27.36 ($256,664) on October 6, 2026; holds 380,302 after (Direct).
- Open-market sale: disposed of 1,100 Common Stock at $28.21 ($31,031) on October 6, 2026; holds 379,202 after (Direct).
- Open-market sale: disposed of 901 Common Stock at $29.71 ($26,769) on October 6, 2026; holds 378,301 after (Direct).
- Open-market sale: disposed of 499 Common Stock at $30.53 ($15,234) on October 6, 2026; holds 377,802 after (Direct).
- Option exercise/conversion: acquired 11,881 Common Stock at $12.14 ($144,235) on October 7, 2026; holds 389,683 after (Direct).
- Open-market sale: disposed of 11,881 Common Stock at $26.40 ($313,658) on October 7, 2026; holds 377,802 after (Direct).
- Option exercise/conversion: acquired 11,881 Common Stock at $12.14 ($144,235) on October 8, 2026; holds 389,683 after (Direct).
- Open-market sale: disposed of 11,881 Common Stock at $25.66 ($304,866) on October 8, 2026; holds 377,802 after (Direct).
- Option exercise/conversion: disposed of 11,881 Stock Option (right to buy) on October 6, 2026; holds 332,253 after (Direct).
- Option exercise/conversion: disposed of 11,881 Stock Option (right to buy) on October 7, 2026; holds 320,372 after (Direct).
- Option exercise/conversion: disposed of 11,881 Stock Option (right to buy) on October 8, 2026; holds 308,491 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $948,223 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Julie Rubinstein — Officer (President and COO)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-10-06 | Option exercise/conversion | Common Stock | 11,881 | $12 | $144.2K | 389,683 |
| 2026-10-06 | Open-market sale | Common Stock | 9,381 | $27 | $256.7K | 380,302 |
| 2026-10-06 | Open-market sale | Common Stock | 1,100 | $28 | $31.0K | 379,202 |
| 2026-10-06 | Open-market sale | Common Stock | 901 | $30 | $26.8K | 378,301 |
| 2026-10-06 | Open-market sale | Common Stock | 499 | $31 | $15.2K | 377,802 |
| 2026-10-07 | Option exercise/conversion | Common Stock | 11,881 | $12 | $144.2K | 389,683 |
| 2026-10-07 | Open-market sale | Common Stock | 11,881 | $26 | $313.7K | 377,802 |
| 2026-10-08 | Option exercise/conversion | Common Stock | 11,881 | $12 | $144.2K | 389,683 |
| 2026-10-08 | Open-market sale | Common Stock | 11,881 | $26 | $304.9K | 377,802 |
| 2026-10-06 | Option exercise/conversion | Stock Option (right to buy) | 11,881 | — | — | 332,253 |
| 2026-10-07 | Option exercise/conversion | Stock Option (right to buy) | 11,881 | — | — | 320,372 |
| 2026-10-08 | Option exercise/conversion | Stock Option (right to buy) | 11,881 | — | — | 308,491 |
Key Dates
| Date | Description |
|---|---|
| 2026-10-06 | Option exercise/conversion (11,881 shares) |
| 2026-10-06 | Open-market sale (9,381 shares) |
| 2026-10-06 | Open-market sale (1,100 shares) |
| 2026-10-06 | Open-market sale (901 shares) |
| 2026-10-06 | Open-market sale (499 shares) |
| 2026-10-07 | Option exercise/conversion (11,881 shares) |
| 2026-10-07 | Open-market sale (11,881 shares) |
| 2026-10-08 | Option exercise/conversion (11,881 shares) |
| 2026-10-08 | Open-market sale (11,881 shares) |
| 2026-10-06 | Option exercise/conversion (11,881 shares) |
| 2026-10-07 | Option exercise/conversion (11,881 shares) |
| 2026-10-08 | Option exercise/conversion (11,881 shares) |
Keywords
insider transaction, Form 4, ADPT, Adaptive Biotechnologies Corp, bearish, Julie Rubinstein
Disclaimer:The information provided here is for general informational purposes only and does not constitute financial advice, recommendation, or endorsement of any kind. It may contain errors or omissions. You should not rely on this information to make financial decisions. Always seek the advice of a qualified financial professional before making any investment or financial decisions. Use of this information is at your own risk.