Adaptive Biotechnologies
ADPT · NASDAQ
$24.42+$0.47 (+1.96%)TodayMarket closed ·
Prev close $23.95
Who owns ADPT
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 49.6% of ADPT’s shares.
- Viking Global Investors LP18.9%
- BlackRock Institutional Trust Company, N.A.7.7%
- Vanguard Capital Management, LLC4.0%
- Wellington Management Company, LLP3.7%
- Next 6 largest institutions15.3%
- All other shareholders50.4%
| Holder | Shares | % of shares |
|---|---|---|
| Viking Global Investors LP | 29.99M | 18.86% |
| BlackRock Institutional Trust Company, N.A. | 12.21M | 7.68% |
| Vanguard Capital Management, LLC | 6.40M | 4.03% |
| Wellington Management Company, LLP | 5.91M | 3.72% |
| Vanguard Portfolio Management, LLC | 5.48M | 3.44% |
| D. E. Shaw & Co., L.P. | 4.63M | 2.91% |
| Westfield Capital Management Company, L.P. | 4.27M | 2.68% |
| Geode Capital Management, L.L.C. | 3.64M | 2.29% |
| State Street Investment Management (US) | 3.46M | 2.17% |
| Invesco Advisers, Inc. | 2.86M | 1.80% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 4.85M | 3.05% |
| iShares Russell 2000 ETF | 3.96M | 2.49% |
| ARK Genomic Revolution ETF | 1.88M | 1.18% |
| Vanguard Small-Cap Index Fund | 1.75M | 1.10% |
| Fidelity Small Cap Index Fund | 1.67M | 1.05% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $55.75M (60 trades) of ADPT on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| RUBINSTEIN JULIE | Option exercise | 11.88K | — |
| RUBINSTEIN JULIE | Sale | 300 | $7.64K |
| RUBINSTEIN JULIE | Sale | 11.58K | $280.38K |
| RUBINSTEIN JULIE | Option exercise | 11.88K | $144.24K |
| RUBINSTEIN JULIE | Option exercise | 11.88K | — |
| RUBINSTEIN JULIE | Sale | 11.88K | $304.27K |
| RUBINSTEIN JULIE | Option exercise | 11.88K | $144.24K |
| RUBINSTEIN JULIE | Option exercise | 11.88K | — |
| RUBINSTEIN JULIE | Sale | 5.10K | $131.68K |
| RUBINSTEIN JULIE | Sale | 6.78K | $173.39K |
Short interest
Settled Sep 30, 2026
- Shares short
- 11.84M
- Days to cover
- 4.43
- % of shares outstanding
- 7.45%
- Average daily volume
- 2.67M
- Change since last report
- −12.2%
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