StockCIK 1478320
Adaptive Biotechnologies Corp (ADPT): Insider Trades and Fund Holdings
In the past 12 months, Adaptive Biotechnologies Corp insiders reported 0 open-market purchases worth $0 and 27 sales worth $28.8M; 22 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$28.8MSold by insiders, 12 months
3Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 26, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 26 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $309K |
| Oct 26 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $297K |
| Oct 26 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $291K |
| Oct 21 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $302K |
| Oct 21 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $291K |
| Oct 21 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $286K |
| Oct 16 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $305K |
| Oct 16 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $304K |
| Oct 16 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $288K |
| Oct 13 | Julie RubinsteinCOO | ▼ SELL10b5-1 | $314K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
All 27 ADPT insider trades →Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Julie Rubinstein | COO | 0 | $0 | 18 | $5.56M |
| Susan Bobulsky | Chief Commercial Officer, MRD | 0 | $0 | 2 | $226K |
| Francis Lo | Chief People Officer | 0 | $0 | 2 | $4.00M |
| Katey Einterz Owen | Director | 0 | $0 | 1 | $250K |
| Robert Hershberg | Director | 0 | $0 | 1 | $748K |
| Chad M. Robins | CEO | 0 | $0 | 2 | $14.9M |
| Peter M. Neupert | Director | 0 | $0 | 1 | $3.14M |
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Tracked funds that report ADPT
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Viking Global Investors | 29,993,708 | $643.4M | No change |
| Renaissance Technologies | 302,800 | $6.50M | ▲ +26.3% |
| Bridgewater Associates | 40,087 | $860K | ▼ −55.3% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →