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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Of the 17 tracked institutions holding REGN, 9 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +2.8pt. It's a gauge of who owns the name, not just how many.
Among the 17 tracked institutional investors we monitor, REGN (REGENERON PHARMACEUTICALS) is held with a combined value of $19.62B across 29,162,169 shares. The largest holder is VANGUARD GROUP INC with a position worth $7.00B (0.10% of their portfolio). 11 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$19.62B
Total Shares Held
29,162,169
Institutional Holders
17
Days to Cover
3.1-29.2%
2.40M shares short · FINRA 2026-08-14
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
10
$3.44M
Total Transactions
10
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 3, 2026 | Marion McCourt | S | Sale | 1,131 | $969.71K |
| Sep 2, 2026 | Kathryn Guarini | S | Sale | 400 | $340.00K |
| Sep 2, 2026 | Marion McCourt | S | Sale | 1,215 | $1.03M |
| Aug 10, 2026 | Kathryn Guarini | S | Sale | 400 | $320.00K |
| Aug 10, 2026 | Huda Y Zoghbi | S | Sale | 800 | $640.00K |
| 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. | $5.68B | 0.08% | +1.9% |
| 3 | STATE STREET CORP | $3.01B | 0.09% | +3.6% |
| 4 | PRICE T ROWE ASSOCIATES INC /MD/ | $953.84M | 0.10% | -29.8% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $791.95M | 0.14% | -30.9% |
| 6 | AQR CAPITAL MANAGEMENT LLC | $702.16M | 0.24% | -8.5% |
| 7 | FMR LLC | $518.76M | 0.02% | -45.2% |
| 8 | TWO SIGMA ADVISERS, LP | $466.63M | 0.91% | -34.7% |
| 9 | MILLENNIUM MANAGEMENT LLC | $102.96M | 0.07% | +24.9% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $92.42M | 0.13% | +121.9% |
| 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, 17 institutional investors hold REGN with a combined value of $19.62B.
Institutional investors hold $19.62B worth of REGN stock across 17 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
$807.65
2026-09-09
YTD
+4.0%
85% of 52-week range
