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Ticker · held by 3 filers

RARE

ULTRAGENYX PHARMACEUTICAL IN

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

Total value held
$299.9M
Total shares
8,631,177
Filers holding
3 · 5 positions
Caveat
long only · 13F-eligible managers only
Filers holding RARE
# Filer Class Shares Value (USD) % of port
1 BlackRock · Larry Fink COM 5,603,352 $230.3M 0.01%
2 Citadel Advisors · Ken Griffin COM 2,326,125 $53.5M 0.01%
3 Renaissance Technologies · Jim Simons (founder) COM 366,100 $8.4M 0.01%
4 Citadel Advisors · Ken Griffin PUTCOM 298,000 $6.9M 0.00%
5 Citadel Advisors · Ken Griffin CALLCOM 37,600 $864.8K 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 RARE 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