ADPT Adaptive Biotechnologies Corporation

NASDAQ
$24.20

Adaptive Biotechnologies Corporation (ADPT) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Bearish Selling ran elevated versus ADPT's own trailing one-year pace, with 62% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 9 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
9
28 transactions
Purchases
$0
0 shares
Sales
$49.6M
2,184,045 shares
Net activity
-$49.6M
purchases less sales

How much of that selling was preplanned? 62% planned / 38% discretionary

10b5-1 plan sales $30.6M 18 transactions · 1,419,076 shares
Discretionary sales $19.0M 10 transactions · 764,969 shares

Largest single sale: $8.0M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
OWEN KATEY EINTERZ Director Sell 9,615 $26.00 $250.0K 78,639 −10.9% of holding
ROBINS CHAD M 2 fills CEO and Chairman Sell 278,676 $24.48 $6.8M 2,180,722 −11.3% of holding
HERSHBERG ROBERT 2 fills Director Sell 30,664 $24.40 $748.2K 62,347 −33% of holding
ROBINS CHAD M 2 fills CEO and Chairman Sell 321,324 $25.08 $8.1M 2,183,043 −12.8% of holding
NEUPERT PETER M 3 fills Director Sell 124,690 $25.15 $3.1M 240,315 −34.2% of holding
BOBULSKY SUSAN Chief Commercial Officer, MRD Sell 10b5-1 3,000 $25.00 $75.0K 396,989 −0.8% of holding
BOBULSKY SUSAN Chief Commercial Officer, MRD Sell 10b5-1 1,299 $24.00 $31.2K 399,989 −0.3% of holding
ROBINS HARLAN S 2 fills Chief Scientific Officer Sell 10b5-1 492,400 $21.89 $10.8M 1,025,760 −32.4% of holding
BOBULSKY SUSAN Chief Commercial Officer, MRD Sell 10b5-1 5,000 $23.00 $115.0K 401,288 −1.2% of holding
LO FRANCIS Chief People Officer Sell 10b5-1 105,762 $22.59 $2.4M 230,713 −31.4% of holding
ROBINS HARLAN S 2 fills Chief Scientific Officer Sell 10b5-1 386,240 $22.01 $8.5M 1,166,547 −24.9% of holding
LO FRANCIS Chief People Officer Sell 10b5-1 44,838 $22.59 $1.0M 230,713 −16.3% of holding
LO FRANCIS 2 fills Chief People Officer Sell 10b5-1 51,004 $22.45 $1.1M 279,949 −15.4% of holding
BOBULSKY SUSAN Chief Commercial Officer, MRD Sell 10b5-1 487 $22.00 $10.7K 406,288 −0.1% of holding
BENZENO SHARON Chief Commercial Ofc Imm Med Sell 10b5-1 154,768 $21.14 $3.3M 221,278 −41.2% of holding
BENZENO SHARON Chief Commercial Ofc Imm Med Sell 10b5-1 11,034 $21.00 $231.7K 272,751 −3.9% of holding
GRIFFIN MICHELLE RENEE Director Sell 10b5-1 52,084 $20.18 $1.1M 15,625 −76.9% of holding
BOBULSKY SUSAN Chief Commercial Officer, MRD Sell 10b5-1 5,000 $20.50 $102.5K 406,775 −1.2% of holding
ROBINS HARLAN S Chief Scientific Officer Sell 10b5-1 6,160 $18.01 $110.9K 1,405,898 −0.4% of holding
ROBINS HARLAN S Chief Scientific Officer Sell 10b5-1 100,000 $17.37 $1.7M 1,412,058 −6.6% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.