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Of the 19 tracked institutions holding REGN, 12 have a 3-year clone track record — 10 of them beat the S&P. Average holder's clone alpha: +4.3pt. It's a gauge of who owns the name, not just how many.
Among the 19 tracked institutional investors we monitor, REGN (REGENERON PHARMACEUTICALS) is held with a combined value of $23.25B across 30,108,672 shares. The largest holder is VANGUARD GROUP INC with a position worth $7.00B (0.10% of their portfolio). Magnetar Financial LLC opened a new position in the most recent quarter. 10 funds increased their holdings. 8 funds reduced their position.
Total Institutional Value
$23.25B
Total Shares Held
30,108,672
Institutional Holders
19
Days to Cover
2.9+5.8%
3.49M shares short · FINRA 2026-06-30
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
5
$140.53K
Total Transactions
5
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Jul 2, 2026 | ARTHUR F RYAN | S | Sale | 200 | $130.03K |
| May 1, 2026 | ARTHUR F RYAN | S | Sale | 5 | $3.51K |
| Apr 1, 2026 | ARTHUR F RYAN | S | Sale | 1 | $771 |
| Mar 2, 2026 | ARTHUR F RYAN | S | Sale | 7 | $5.44K |
| Feb 9, 2026 | ARTHUR F RYAN | S | Sale | 1 | $776 |
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $7.00B | 0.10% | +0.3% |
| 2 | BlackRock, Inc. | $6.91B | 0.12% | +2.4% |
| 3 | STATE STREET CORP | $3.60B | 0.12% | +0.1% |
| 4 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.68B | 0.19% | +11.7% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $1.42B | 0.27% | +176.5% |
| 6 | FMR LLC | $1.17B | 0.06% | -34.5% |
| 7 | AQR CAPITAL MANAGEMENT LLC | $946.01M | 0.43% | +23.6% |
| 8 | MILLENNIUM MANAGEMENT LLC | $102.17M | 0.04% | -70.2% |
| 9 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $79.66M | 0.12% | +25.0% |
| 10 | Capital Research Global Investors | $78.72M | 0.01% | -1.4% |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Sell | May 15, 2026 |
| Alan Armstrong | Buy | Mar 27, 2026 |
| Julia Letlow | Buy | Feb 12, 2026 |
| Gilbert Cisneros | Buy |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of REGN with a position worth $7.00B, representing 0.10% of their portfolio. In total, 19 institutional investors hold REGN with a combined value of $23.25B.
In the most recent quarter, 1 fund opened a new position in REGN. Additionally, 10 increased their holdings and 8 reduced their positions.
Institutional investors hold $23.25B worth of REGN stock across 19 positions. The largest institutional holder is VANGUARD GROUP INC with $7.00B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For REGN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their REGN positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Nov 18, 2025 |
| Rob Bresnahan | Buy | May 15, 2025 |
| Byron Donalds | Sell | Apr 10, 2025 |
| Rob Bresnahan | Sell | Apr 8, 2025 |
| Jefferson Shreve | Sell | Apr 7, 2025 |
Showing 8 of 29. STOCK Act disclosures lag up to 45 days.
Last Close
$656.01
2026-07-24
YTD
-15.5%
41% of 52-week range
