🕵️ Adaptive Biotechnologies Corporation ($ADPT)
SEC insider & ownership activity, last 12 months · CIK 1478320 · every row links its SEC filing
Over the last 12 months insiders sold $99.5M with no open-market buying against it. Harlan S. Robins sold $29.6M (Nov–Jul). 2 planned sales are pending, the largest $1.7M (Harlan Robins). No red-flag 8-Ks in the window.
🚨 12 signals active —
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 9 sellers, $99.5M (113 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Harlan S. Robins | 0 | – | 17 | $29.6M | Jul 21, 2026 |
| Chad Robins | 0 | – | 15 | $24.9M | Apr 8, 2026 |
| Benzeno Sharon | 0 | – | 6 | $14.7M | Jun 29, 2026 |
| Rubinstein Julie | 0 | – | 47 | $13.4M | Apr 27, 2026 |
| Francis Lo | 0 | – | 12 | $9.9M | Jul 15, 2026 |
| Piskel Kyle | 0 | – | 6 | $3.6M | May 18, 2026 |
| Griffin Michelle Renee | 0 | – | 3 | $2.0M | Jun 25, 2026 |
| Susan Bobulsky | 0 | – | 6 | $1.1M | Jul 16, 2026 |
| Hershberg Robert | 0 | – | 1 | $367K | Dec 10, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Viking Global Investors LP | 18.8% | 13G | May 15, 2026 | filing ↗ | |
| Halvorsen Ole Andreas | 18.8% | 13G | May 15, 2026 | filing ↗ | |
| Shabet Rose Sharon | 18.8% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Performance LLC | 13.8% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Equities Master Ltd. | 13.5% | 13G | May 15, 2026 | filing ↗ | |
| Blackrock, Inc. | 7.9% | 13G | Jan 21, 2026 | filing ↗ | |
| Viking LONG Fund GP LLC | 5.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking LONG Fund Master Ltd. | 5.0% | 13G | May 15, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Harlan Robins | $11.1M | Jul 21, 2026 | filing ↗ |
| Susan Bobulsky | $114K | Jul 16, 2026 | filing ↗ |
| Harlan Robins | $8.2M | Jul 2, 2026 | filing ↗ |
| Francis Lo | $4.3M | Jul 1, 2026 | filing ↗ |
| Susan Bobulsky | $10K | Jul 1, 2026 | filing ↗ |
| Sharon Benzeno | $3.2M | Jun 29, 2026 | filing ↗ |
| Sharon Benzeno | $261K | Jun 26, 2026 | filing ↗ |
| Susan Bobulsky | $97K | Jun 25, 2026 | filing ↗ |
| Michelle Griffin | $1.0M | Jun 25, 2026 | filing ↗ |
| Harlan Robins | $106K | Jun 16, 2026 | filing ↗ |
| Harlan Robins | $1.7M | Jun 15, 2026 | filing ↗ |
| Susan Bobulsky | $85K | Jun 11, 2026 | filing ↗ |
| Susan Bobulsky | $176K | Jun 4, 2026 | filing ↗ |
| Francis Lo | $673K | Jun 4, 2026 | filing ↗ |
| Piskel Kyle | $41K | May 18, 2026 | filing ↗ |
| Harlan Robins | $148K | Apr 8, 2026 | filing ↗ |
| Chad Robins | $553K | Apr 8, 2026 | filing ↗ |
| Francis Lo | $309K | Apr 8, 2026 | filing ↗ |
| Chad Robins | $1.2M | Apr 6, 2026 | filing ↗ |
| Francis Lo | $444K | Mar 11, 2026 | filing ↗ |
| Michelle Griffin | $214K | Mar 11, 2026 | filing ↗ |
| Bobulsky Susan | $600K | Mar 11, 2026 | filing ↗ |
| Benzeno Sharon | $916K | Mar 11, 2026 | filing ↗ |
| Harlan S. Robins | $6.8M | Mar 11, 2026 | filing ↗ |
| Rubinstein Julie | $1.8M | Mar 11, 2026 | filing ↗ |
| Piskel Kyle | $271K | Mar 11, 2026 | filing ↗ |
| Chad M. Robins | $6.8M | Mar 11, 2026 | filing ↗ |
| Lo Francis | $626K | Mar 5, 2026 | filing ↗ |
| Harlan Robins | $229K | Mar 3, 2026 | filing ↗ |
| Chad Robins | $854K | Mar 3, 2026 | filing ↗ |
| Julie Rubinstein | $19.5M | Mar 3, 2026 | filing ↗ |
| Michelle Griffin | $774K | Mar 3, 2026 | filing ↗ |
| Harlan Robins | $161K | Mar 2, 2026 | filing ↗ |
| Chad Robins | $4.7M | Mar 2, 2026 | filing ↗ |
| Chad Robins | $2.9M | Feb 27, 2026 | filing ↗ |
| Harlan Robins | $150K | Feb 3, 2026 | filing ↗ |
| Harlan Robins | $638K | Feb 2, 2026 | filing ↗ |
| Chad Robins | $2.3M | Feb 2, 2026 | filing ↗ |
| Francis Lo | $1.0M | Jan 12, 2026 | filing ↗ |
| Kyle Piskel | $175K | Jan 12, 2026 | filing ↗ |
| Harlan Robins | $161K | Jan 6, 2026 | filing ↗ |
| Chad Robins | $2.0M | Jan 5, 2026 | filing ↗ |
| Francis Lo | $2.1M | Dec 15, 2025 | filing ↗ |
| Robert M Hershberg | $367K | Dec 10, 2025 | filing ↗ |
| Harlan Robins | $175K | Dec 4, 2025 | filing ↗ |
| Sharon Benzeno | $216K | Dec 4, 2025 | filing ↗ |
| Harlan Robins | $466K | Dec 3, 2025 | filing ↗ |
| Chad Robins | $2.4M | Dec 1, 2025 | filing ↗ |
| Kyle Piskel | $3.2M | Nov 28, 2025 | filing ↗ |
| Chad Robins | $705K | Nov 26, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jul 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 24, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 15, 2026 | filing ↗ |
| Agreement terminated (1.02) | Jun 15, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 15, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jun 15, 2026 | filing ↗ |
| Other events (8.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Other events (8.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 5, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Earnings (2.02) | Feb 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 5, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Other events (8.01) | Dec 30, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Agreement terminated (1.02) | Aug 13, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |