ADPT
ADAPTIVE BIOTECH (ADPT)
NASDAQ
$23.71-$0.49 (-2.03%)
Price as of Sep 11, 2026 7:57 PM EDT
  • $3.9B
    Market Cap
  • 91.91%
    1-Year Change
  • Diagnostics & Research
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VIKING GLOBAL INVESTORS LP
18.74%
30.0M
0 (0.00%)
Jun 30, 2026
BLACKROCK, INC.
9.46%
15.1M
+1.8M (+12.13%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
7.57%
12.1M
+188,005 (+1.55%)
Dec 31, 2024
BLACKROCK INC.
7.29%
11.7M
+473,883 (+4.06%)
Jun 30, 2024
MATRIX CAPITAL MANAGEMENT COMPANY, LLC
7.23%
11.6M
0 (0.00%)
Dec 31, 2021
VANGUARD GROUP INC
7.05%
11.3M
+6,983 (+0.06%)
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
4.00%
6.4M
+309,443 (+4.83%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions2.7B (77.08%)
  • Mutual Funds689.4M (19.44%)
  • Insiders123.4M (3.48%)
  • Other0 (0.00%)

Insider Transactions

  • 3.48% (123.4M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 10
    Number of InsiderSelling (last 12 months)
  • $919.0M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
OWEN KATEY EINTERZ
Sell
Aug 26, 2026
$249,990.00
9,615
$26.00
78,639
ROBINS CHAD M
CEO and Chairman
Exempt
Aug 18, 2026
$0.00
278,676
$0.00
0
HERSHBERG ROBERT
Exempt
Aug 18, 2026
$0.00
15,000
$0.00
0
ROBINS CHAD M
CEO and Chairman
Exempt
Aug 18, 2026
$1.8M
278,676
$6.55
2.5M
HERSHBERG ROBERT
Exempt
Aug 18, 2026
$94,800.00
15,000
$6.32
77,347
ROBINS CHAD M
CEO and Chairman
Sell
Aug 18, 2026
$6.8M
278,472
$24.48
2.2M
HERSHBERG ROBERT
Sell
Aug 18, 2026
$365,850.00
15,000
$24.39
62,347
ROBINS CHAD M
CEO and Chairman
Sell
Aug 18, 2026
$5,128.56
204
$25.14
2.2M
HERSHBERG ROBERT
Sell
Aug 18, 2026
$382,358.24
15,664
$24.41
46,683
ROBINS CHAD M
CEO and Chairman
Exempt
Aug 17, 2026
$0.00
321,324
$0.00
278,676
ROBINS CHAD M
CEO and Chairman
Exempt
Aug 17, 2026
$2.1M
321,324
$6.55
2.5M
ROBINS CHAD M
CEO and Chairman
Sell
Aug 17, 2026
$8.0M
318,799
$25.08
2.2M
ROBINS CHAD M
CEO and Chairman
Sell
Aug 17, 2026
$64,564.25
2,525
$25.57
2.2M
BOBULSKY SUSAN
Chief Commercial Officer, MRD
Sell
Aug 10, 2026
$75,000.00
3,000
$25.00
396,989
BOBULSKY SUSAN
Chief Commercial Officer, MRD
Sell
Jul 30, 2026
$31,176.00
1,299
$24.00
399,989
BOBULSKY SUSAN
Chief Commercial Officer, MRD
Sell
Jul 16, 2026
$115,000.00
5,000
$23.00
401,288
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$0.00
59,374
$0.00
0
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$0.00
23,677
$0.00
132,246
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$0.00
22,711
$0.00
37,511
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$463,117.20
59,374
$7.80
290,087
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$287,438.78
23,677
$12.14
313,764
LO FRANCIS
Chief People Officer
Exempt
Jul 15, 2026
$192,135.06
22,711
$8.46
336,475
LO FRANCIS
Chief People Officer
Sell
Jul 15, 2026
$2.4M
105,762
$22.59
230,713
ROBINS HARLAN S
Chief Scientific Officer
Sell
Jul 02, 2026
$5.2M
239,351
$21.74
1.2M
LO FRANCIS
Chief People Officer
Exempt
Jul 02, 2026
$98,482.80
12,626
$7.80
250,314
ROBINS HARLAN S
Chief Scientific Officer
Sell
Jul 02, 2026
$3.3M
146,889
$22.45
1.0M
LO FRANCIS
Chief People Officer
Exempt
Jul 02, 2026
$152,964.00
12,600
$12.14
262,914
LO FRANCIS
Chief People Officer
Exempt
Jul 02, 2026
$106,909.02
12,637
$8.46
275,551
LO FRANCIS
Chief People Officer
Sell
Jul 02, 2026
$1.0M
44,838
$22.59
230,713
LO FRANCIS
Chief People Officer
Exempt
Jul 02, 2026
$0.00
12,626
$0.00
59,374