Ticker · held by 3 filers

RMBS

RAMBUS INC DEL

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

Total value held

$982.0M

Total shares

16,378,703

Filers holding

3 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding RMBS

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 15,786,205 $927.6M 0.02%

2 Citadel Advisors · Ken Griffin CALLCOM 188,200 $17.3M 0.00%

3 Citadel Advisors · Ken Griffin COM 169,902 $15.6M 0.00%

4 Bridgewater Associates · Ray Dalio (founder) COM 154,296 $14.2M 0.05%

5 Citadel Advisors · Ken Griffin PUTCOM 80,100 $7.4M 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 RMBS 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