Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
REGN
REGENERON PHARMACEUTICALSData as of 2026 Q1 (03-31) · 13F snapshot
Summary
REGENERON PHARMACEUTICALS (REGN) is held by 14 tracked hedge-fund managers, a combined reported value of ~$922.84M; the largest are Ken Griffin, Ken Griffin, Steven Cohen. This quarter: 2 added, 4 trimmed, 2 closed. 20 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Cooling
Gurus holding14
Congress trades20
Price$612.14vs quarter-end-20.77%
Sectors1
This quarter's moves
Top holderKen GriffinNew0
Added2
Trimmed / sold6
Value $165.11M— of portfolio213,7002026 Q1
Value $133.20M— of portfolio172,4002026 Q1
Value $111.11M— of portfolio143,8002026 Q1
Value $105.00M— of portfolio200,0002025 Q2
Seth KlarmanHold
Value $32.83M1.9% of portfolio1,000,0002010 Q4
Value $31.91M— of portfolio41,3002026 Q1
Value $21.79M— of portfolio28,2002026 Q1
Michael BurryNew large stake
Value $7.88M14.0% of portfolio15,0002025 Q2
Value $3.55M— of portfolio4,6002026 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Ken GriffinCALL | $165.11M | — | — |
| Ken GriffinPUT | $133.20M | — | — |
| Steven CohenPUT | $111.11M | — | — |
| Michael BurryCALL | $105.00M | — | — |
| Seth Klarman | $32.83M | 1.9% | Hold |
| Izzy EnglanderPUT | $31.91M | — | — |
| Izzy EnglanderCALL | $21.79M | — | — |
| Michael Burry | $7.88M | 14.0% | New large stake |
| Steven CohenCALL | $3.55M | — | — |