4 hedge funds and family offices disclose a REGN position in their latest SEC 13F filing — combined $254.3M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Harry Burn | Sound Shore Management Inc /CT/ | 175,887 | $135.8M | 4.32% | 2025-12-31 |
| 2 | Mason Hawkins | Southeastern Asset Management, Inc. | 130,662 | $101.0M | 4.97% | 2026-03-31 |
| 3 | Ray Dalio | Bridgewater Associates LP | 22,724 | $17.6M | 0.08% | 2026-03-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 40 | $31K | 0.00% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold REGN. The largest disclosed position is Harry Burn at $135.8M (4.3% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying REGN, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
4 hedge funds and family offices disclose a REGN position in their latest SEC 13F filing — combined $254.3M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Harry Burn | Sound Shore Management Inc /CT/ | 175,887 | $135.8M | 4.32% | 2025-12-31 |
| 2 | Mason Hawkins | Southeastern Asset Management, Inc. | 130,662 | $101.0M | 4.97% | 2026-03-31 |
| 3 | Ray Dalio | Bridgewater Associates LP | 22,724 | $17.6M | 0.08% | 2026-03-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 40 | $31K | 0.00% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold REGN. The largest disclosed position is Harry Burn at $135.8M (4.3% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying REGN, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
