Who owns ADPT? 13F holders and whale ownership
ADPT is tracked across public portfolios in Whale Analyzer. This page answers who owns ADPT, which top funds are buying ADPT, aggregate disclosed value, and recent position changes based on public data. Andreas Halvorsen is the largest reported holder at $416M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades below the aggregate whale cost basis of $49.96. Top tracked holders include Andreas Halvorsen, Cathie Wood, and Joseph Edelman.
Continue to the live ADPT dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Andreas Halvorsen 13F portfolio Viking Global Investors holdings | $416.3M | 30.0M | Held |
| Cathie Wood 13F portfolio ARK Investment Management holdings | $29.1M | 2.1M | Reduced |
| Joseph Edelman 13F portfolio Perceptive Advisors holdings | $2.1M | 152.5K | New |
Ownership concentration
Reported ownership of ADPT is highly concentrated across tracked institutions.
- Single largest holder: 93.0% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 3 tracked institutions, 1 held, 1 reduced, 1 increased. Net positioning is net selling.
- Andreas Halvorsen — Viking Global Investors ($416.3M) (→ 0.0% qoq shares) · avg cost $48.96
- Cathie Wood — ARK Investment Management ($29.1M) (▼ 2.2% qoq shares) · avg cost $64.42
Whale cost basis vs current price
The aggregate tracked cost basis is $49.96 versus a current price of $20.96, so ADPT trades below its cost basis (-58.1%). Average unrealized P&L across tracked holders: -75%.
Sector positioning — Health Care
ADPT sits within the Health Care sector alongside 221 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live ADPT dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on ADPT with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns ADPT stock?
Whale Analyzer tracks 3 public institutional holders of ADPT with a combined reported value of $447.5M. See the holder table above for the largest tracked positions.
Which top funds are buying ADPT?
Tracked institutions were net selling last quarter — 1 held, 1 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is ADPT ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is ADPT above or below the whale cost basis?
The aggregate tracked cost basis is $49.96 versus a current price of $20.96 (-58.1%).
What does 13F ownership mean for ADPT?
Use the interactive ADPT dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.