Adaptive Biotechnologies Corporation (ADPT) Insider Trading
Over the last 3 months, ADPT insiders made 0 open-market buys and 42 sales, a net sale of -$25.0M (SEC Form 4). Over the last 6 months, 217 institutions increased and 185 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
42
Net (3m)
-$25.0M
Insider trades by month Buys Sells
Dec
Jan
Feb
Mar
Apr
May
Context3-month price +13.5%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 20, 2026 | PISKEL KYLEofficer: Chief Financial Officer | Sell | 3,115 | $13.04 |
| Apr 29, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 19,037 | $14.23 |
| Apr 29, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,707 | $8.46 |
| Apr 24, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 19,060 | $14.13 |
| Apr 24, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,722 | $8.46 |
| Apr 21, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 30,941 | $14.66 |
| Apr 21, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 11,881 | $12.14 |
| Apr 21, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 19,060 | $14.57 |
| Apr 21, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,722 | $8.46 |
| Apr 16, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 19,060 | $14.56 |
| Apr 16, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,722 | $8.46 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,722 | $7.27 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 16,960 | $13.79 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 18,660 | $12.75 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 3,338 | $14.08 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 15,722 | $12.95 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 8,109 | $7.27 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 400 | $13.48 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 2,100 | $14.44 |
| Apr 13, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 6,613 | $8.46 |
| Apr 10, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Sell | 10,000 | $14.85 |
| Apr 10, 2026 | LO FRANCISofficer: Chief People Officer | Option | 2,344 | $3.99 |
| Apr 10, 2026 | LO FRANCISofficer: Chief People Officer | Sell | 22,564 | $15.07 |
| Apr 8, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 11,881 | $12.14 |
| Apr 8, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 83,332 | $14.41 |
| Apr 8, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 37,263 | $15.19 |
| Apr 8, 2026 | RUBINSTEIN JULIEofficer: President and COO | Option | 14,722 | $7.27 |
| Apr 8, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 100 | $15.48 |
| Apr 8, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 30,841 | $14.83 |
| Apr 8, 2026 | RUBINSTEIN JULIEofficer: President and COO | Sell | 19,060 | $14.33 |
Source: ADPT SEC Form 4 filings, latest May 20, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ADPT positions over the last 6 months (SEC Form 13F).
Increased
217
New positions
96
Reduced
185
Sold out
74
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| VIKING GLOBAL INVESTORS LP | Unchanged | 30.0M | Feb 17, 2026 |
| VIKING GLOBAL INVESTORS LP | Unchanged | 30.0M | May 15, 2026 |
| BLACKROCK, INC. | Reduced | 13.3M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 13.3M | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 11.3M | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 6.1M | May 15, 2026 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Increased | 5.4M | May 11, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 4.5M | May 8, 2026 |
| INVESCO LTD. | Increased | 4.5M | May 12, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 4.4M | Feb 17, 2026 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | New Position | 4.1M | Feb 11, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 3.9M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.6M | May 15, 2026 |
| LORD, ABBETT & CO. LLC | Increased | 3.5M | May 14, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.5M | Feb 9, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.