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)
DateInsiderTypeSharesPrice
Aug 28, 2026OWEN KATEY EINTERZdirectorSell9,615$26.00
Aug 20, 2026HERSHBERG ROBERTdirectorOption15,000$6.32
Aug 20, 2026HERSHBERG ROBERTdirectorSell15,664$24.41
Aug 20, 2026HERSHBERG ROBERTdirectorSell15,000$24.39
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanOption321,324$6.55
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanSell318,799$25.08
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanSell2,525$25.57
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanOption278,676$6.55
Aug 19, 2026NEUPERT PETER MdirectorOption15,000$6.32
Aug 19, 2026NEUPERT PETER MdirectorSell15,000$25.23
Aug 19, 2026NEUPERT PETER MdirectorSell40,000$25.10
Aug 19, 2026NEUPERT PETER MdirectorSell69,690$25.16
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanSell204$25.14
Aug 19, 2026ROBINS CHAD Mdirector, officer: CEO and ChairmanSell278,472$24.48
Aug 12, 2026BOBULSKY SUSANofficer: Chief Commercial Officer, MRDSell3,000$25.00
Aug 3, 2026BOBULSKY SUSANofficer: Chief Commercial Officer, MRDSell1,299$24.00
Jul 23, 2026ROBINS HARLAN Sofficer: Chief Scientific OfficerSell278,698$21.72
Jul 23, 2026ROBINS HARLAN Sofficer: Chief Scientific OfficerOption284,800$6.55
Jul 23, 2026ROBINS HARLAN Sofficer: Chief Scientific OfficerSell213,702$22.12
Jul 20, 2026BOBULSKY SUSANofficer: Chief Commercial Officer, MRDSell5,000$23.00
Jul 17, 2026LO FRANCISofficer: Chief People OfficerSell105,762$22.59
Jul 17, 2026LO FRANCISofficer: Chief People OfficerOption59,374$7.80
Jul 17, 2026LO FRANCISofficer: Chief People OfficerOption22,711$8.46
Jul 17, 2026LO FRANCISofficer: Chief People OfficerOption23,677$12.14
Jul 7, 2026ROBINS HARLAN Sofficer: Chief Scientific OfficerSell146,889$22.45
Jul 7, 2026ROBINS HARLAN Sofficer: Chief Scientific OfficerSell239,351$21.74
Jul 6, 2026LO FRANCISofficer: Chief People OfficerOption4,688$3.99
Jul 6, 2026LO FRANCISofficer: Chief People OfficerOption14,064$8.12
Jul 6, 2026LO FRANCISofficer: Chief People OfficerOption3,500$7.80
Jul 6, 2026BOBULSKY SUSANofficer: Chief Commercial Officer, MRDSell487$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
InstitutionActionSharesFiled
VIKING GLOBAL INVESTORS LPUnchanged30.0MAug 14, 2026
VIKING GLOBAL INVESTORS LPUnchanged30.0MMay 15, 2026
BlackRock, Inc.Increased15.1MAug 7, 2026
BLACKROCK, INC.Reduced13.3MMay 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased6.4MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position6.1MMay 15, 2026
WELLINGTON MANAGEMENT GROUP LLPIncreased5.9MAug 14, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCIncreased5.5MAug 13, 2026
WESTFIELD CAPITAL MANAGEMENT CO LPIncreased5.4MMay 11, 2026
D. E. Shaw & Co., Inc.Increased4.6MAug 14, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position4.5MMay 8, 2026
INVESCO LTD.Increased4.5MMay 12, 2026
WESTFIELD CAPITAL MANAGEMENT CO LPReduced4.3MAug 12, 2026
WELLINGTON MANAGEMENT GROUP LLPIncreased3.9MMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased3.6MAug 12, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.