GuruTrack
REGN

REGN

REGENERON PHARMACEUTICALS

Data 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$656.01vs quarter-end-15.09%
Sectors1
This quarter's moves
New0
Added2
Trimmed / sold6
Top holderKen Griffin
Ken GriffinCALL—
Value $165.11M— of portfolio213,7002026 Q1
Ken GriffinPUT—
Value $133.20M— of portfolio172,4002026 Q1
Steven CohenPUT—
Value $111.11M— of portfolio143,8002026 Q1
Michael BurryCALL—
Value $105.00M— of portfolio200,0002025 Q2
Seth KlarmanHold
Value $32.83M1.9% of portfolio1,000,0002010 Q4
Izzy EnglanderPUT—
Value $31.91M— of portfolio41,3002026 Q1
Izzy EnglanderCALL—
Value $21.79M— of portfolio28,2002026 Q1
Michael BurryNew large stake
Value $7.88M14.0% of portfolio15,0002025 Q2
Steven CohenCALL—
Value $3.55M— of portfolio4,6002026 Q1

Insider Trading

Officers · directors · Form 4

  • Arthur F Ryan

    Director

    Sell$130.0K
    200 @ $650.15Traded 2026-07-02Filed 2026-07-07

  • Arthur F Ryan

    Director

    Sell$10.5K
    15 @ $702.46Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$16.9K
    24 @ $703.46Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$9.9K
    14 @ $705.56Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$4.9K
    7 @ $706.74Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$2.8K
    4 @ $707.40Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$4.3K
    6 @ $709.45Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$1.4K
    2 @ $710.87Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$712
    1 @ $712.09Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$3.5K
    5 @ $701.76Traded 2026-05-01Filed 2026-05-04

  • Arthur F Ryan

    Director

    Sell$2.3K
    3 @ $772.76Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$6.2K
    8 @ $773.59Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$10.9K
    14 @ $775.58Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$10.1K
    13 @ $776.62Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$7.0K
    9 @ $777.42Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$3.1K
    4 @ $778.24Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$31.2K
    40 @ $779.71Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$771
    1 @ $771.32Traded 2026-04-01Filed 2026-04-03

  • Arthur F Ryan

    Director

    Sell$1.6K
    2 @ $778.30Traded 2026-03-02Filed 2026-03-03

  • Arthur F Ryan

    Director

    Sell$3.9K
    5 @ $779.69Traded 2026-03-02Filed 2026-03-03

  • Arthur F Ryan

    Director

    Sell$2.3K
    3 @ $780.69Traded 2026-03-02Filed 2026-03-03

  • Arthur F Ryan

    Director

    Sell$7.8K
    10 @ $783.62Traded 2026-03-02Filed 2026-03-03

  • Arthur F Ryan

    Director

    Sell$7.1K
    9 @ $784.48Traded 2026-03-02Filed 2026-03-03

  • Arthur F Ryan

    Director

    Sell$8.6K
    11 @ $785.48Traded 2026-03-02Filed 2026-03-03

Insider transactions are public SEC Form 4 disclosures (company officers, directors, 10% owners), for research only — not investment advice.

Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.