Ticker · held by 5 filers

REGN

REGENERON PHARMACEUTICALS

All tracked filers currently holding REGN, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$9.47B

Total shares

9,212,573

Filers holding

5 · 7 positions

Caveat

long only · 13F-eligible managers only

Filers holding REGN

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 8,446,366 $8.88B 0.20%

2 Citadel Advisors · Ken Griffin PUTCOM 274,000 $211.5M 0.03%

3 Citadel Advisors · Ken Griffin CALLCOM 265,300 $204.8M 0.03%

4 Citadel Advisors · Ken Griffin COM 144,970 $111.9M 0.02%

5 Bridgewater Associates · Ray Dalio (founder) COM 72,745 $56.1M 0.20%

6 Renaissance Technologies · Jim Simons (founder) COM 9,082 $7.0M 0.01%

7 ARK Invest · Cathie Wood Common Stock 110 $84.7K 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of REGN are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI