Adaptive Biotechnologies Corporation (ADPT) Insider Trading
Over the last 3 months, ADPT insiders made 0 open-market buys and 31 sales, a net sale of -$50.6M (SEC Form 4). Over the last 6 months, 214 institutions increased and 186 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
31
Net (3m)
-$50.6M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price -59.7%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 28, 2026 | OWEN KATEY EINTERZdirector | Sell | 9,615 | $26.00 |
| Aug 20, 2026 | HERSHBERG ROBERTdirector | Option | 15,000 | $6.32 |
| Aug 20, 2026 | HERSHBERG ROBERTdirector | Sell | 15,664 | $24.41 |
| Aug 20, 2026 | HERSHBERG ROBERTdirector | Sell | 15,000 | $24.39 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Option | 321,324 | $6.55 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 318,799 | $25.08 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 2,525 | $25.57 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Option | 278,676 | $6.55 |
| Aug 19, 2026 | NEUPERT PETER Mdirector | Option | 15,000 | $6.32 |
| Aug 19, 2026 | NEUPERT PETER Mdirector | Sell | 15,000 | $25.23 |
| Aug 19, 2026 | NEUPERT PETER Mdirector | Sell | 40,000 | $25.10 |
| Aug 19, 2026 | NEUPERT PETER Mdirector | Sell | 69,690 | $25.16 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 204 | $25.14 |
| Aug 19, 2026 | ROBINS CHAD Mdirector, officer: CEO and Chairman | Sell | 278,472 | $24.48 |
| Aug 12, 2026 | BOBULSKY SUSANofficer: Chief Commercial Officer, MRD | Sell | 3,000 | $25.00 |
| Aug 3, 2026 | BOBULSKY SUSANofficer: Chief Commercial Officer, MRD | Sell | 1,299 | $24.00 |
| Jul 23, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Sell | 278,698 | $21.72 |
| Jul 23, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Option | 284,800 | $6.55 |
| Jul 23, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Sell | 213,702 | $22.12 |
| Jul 20, 2026 | BOBULSKY SUSANofficer: Chief Commercial Officer, MRD | Sell | 5,000 | $23.00 |
| Jul 17, 2026 | LO FRANCISofficer: Chief People Officer | Sell | 105,762 | $22.59 |
| Jul 17, 2026 | LO FRANCISofficer: Chief People Officer | Option | 59,374 | $7.80 |
| Jul 17, 2026 | LO FRANCISofficer: Chief People Officer | Option | 22,711 | $8.46 |
| Jul 17, 2026 | LO FRANCISofficer: Chief People Officer | Option | 23,677 | $12.14 |
| Jul 7, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Sell | 146,889 | $22.45 |
| Jul 7, 2026 | ROBINS HARLAN Sofficer: Chief Scientific Officer | Sell | 239,351 | $21.74 |
| Jul 6, 2026 | LO FRANCISofficer: Chief People Officer | Option | 4,688 | $3.99 |
| Jul 6, 2026 | LO FRANCISofficer: Chief People Officer | Option | 14,064 | $8.12 |
| Jul 6, 2026 | LO FRANCISofficer: Chief People Officer | Option | 3,500 | $7.80 |
| Jul 6, 2026 | BOBULSKY SUSANofficer: Chief Commercial Officer, MRD | Sell | 487 | $22.00 |
Source: ADPT SEC Form 4 filings, latest Aug 28, 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
214
New positions
106
Reduced
186
Sold out
44
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| VIKING GLOBAL INVESTORS LP | Unchanged | 30.0M | Aug 14, 2026 |
| VIKING GLOBAL INVESTORS LP | Unchanged | 30.0M | May 15, 2026 |
| BlackRock, Inc. | Increased | 15.1M | Aug 7, 2026 |
| BLACKROCK, INC. | Reduced | 13.3M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 6.4M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 6.1M | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 5.9M | Aug 14, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 5.5M | Aug 13, 2026 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Increased | 5.4M | May 11, 2026 |
| D. E. Shaw & Co., Inc. | Increased | 4.6M | Aug 14, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 4.5M | May 8, 2026 |
| INVESCO LTD. | Increased | 4.5M | May 12, 2026 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Reduced | 4.3M | Aug 12, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 3.9M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.6M | Aug 12, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.