Ticker · held by 5 filers

IONS

IONIS PHARMACEUTICALS INC

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

Total value held

$731.4M

Total shares

13,348,347

Filers holding

5 · 7 positions

Caveat

long only · 13F-eligible managers only

Filers holding IONS

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 10,321,030 $491.9M 0.01%

2 Citadel Advisors · Ken Griffin COM 2,134,636 $168.9M 0.03%

3 ARK Invest · Cathie Wood Common Stock 422,968 $33.5M 0.22%

4 Renaissance Technologies · Jim Simons (founder) COM 223,607 $17.7M 0.03%

5 Citadel Advisors · Ken Griffin CALLCOM 109,400 $8.7M 0.00%

6 Citadel Advisors · Ken Griffin PUTCOM 69,000 $5.5M 0.00%

7 Bridgewater Associates · Ray Dalio (founder) COM 67,706 $5.4M 0.02%

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 IONS 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