Who owns REGN? 13F holders and whale ownership
REGN is tracked across public portfolios in Whale Analyzer. This page answers who owns REGN, which top funds are buying REGN, aggregate disclosed value, and recent position changes based on public data. Dodge & Cox is the largest reported holder at $3.44B; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 2 reduced); the stock trades above the aggregate whale cost basis of $551.8. Top tracked holders include Dodge & Cox, Mason Hawkins, and Samuel Isaly.
Continue to the live REGN dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Dodge & Cox 13F portfolio Dodge & Cox holdings | $3.44B | 4.5M | Reduced |
| Mason Hawkins 13F portfolio Southeastern Asset Management holdings | $101.0M | 130.7K | Reduced |
| Samuel Isaly 13F portfolio OrbiMed Advisors holdings | $11.4M | 14.7K | New |
Ownership concentration
Reported ownership of REGN is highly concentrated across tracked institutions.
- Single largest holder: 96.8% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 3 tracked institutions, 2 reduced, 1 increased. Net positioning is net selling.
- Dodge & Cox — Dodge & Cox ($3.44B) (▼ 3.0% qoq shares) · avg cost $551.75
- Mason Hawkins — Southeastern Asset Management ($101.0M) (▼ 21.2% qoq shares) · avg cost $553.63
Whale cost basis vs current price
The aggregate tracked cost basis is $551.80 versus a current price of $632.90, so REGN trades above its cost basis (+14.7%). Average unrealized P&L across tracked holders: 18%.
Sector positioning — Health Care
REGN 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 REGN dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
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- OXY whale holders — Occidental Petroleum Corp.
- MSFT whale holders — Microsoft Corp.
- BKNG whale holders — Booking Holdings, Inc.
- CVS whale holders — CVS Health Corp.
- MET-PF whale holders — MetLife, Inc.
Learn more in Whale Analyzer Academy
Deepen your read on REGN with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns REGN stock?
Whale Analyzer tracks 3 public institutional holders of REGN with a combined reported value of $3.56B. See the holder table above for the largest tracked positions.
Which top funds are buying REGN?
Tracked institutions were net selling last quarter — 2 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is REGN ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is REGN above or below the whale cost basis?
The aggregate tracked cost basis is $551.80 versus a current price of $632.90 (+14.7%).
What does 13F ownership mean for REGN?
Use the interactive REGN dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.