Ticker · held by 4 filers

MRSH

MARSH & MCLENNAN COS INC

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

Total value held

$9.18B

Total shares

43,707,892

Filers holding

4 · 6 positions

Caveat

long only · 13F-eligible managers only

Filers holding MRSH

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 42,337,144 $8.92B 0.20%

2 Citadel Advisors · Ken Griffin COM 822,371 $152.6M 0.02%

3 Renaissance Technologies · Jim Simons (founder) COM 397,600 $73.8M 0.11%

4 Citadel Advisors · Ken Griffin CALLCOM 117,400 $21.8M 0.00%

5 Bridgewater Associates · Ray Dalio (founder) COM 25,777 $4.8M 0.02%

6 Citadel Advisors · Ken Griffin PUTCOM 7,600 $1.4M 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 MRSH 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