Ticker · held by 5 filers

CMCSA

COMCAST CORP NEW

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

Total value held

$13.22B

Total shares

342,756,317

Filers holding

5 · 7 positions

Caveat

long only · 13F-eligible managers only

Filers holding CMCSA

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink CL A 321,142,381 $12.58B 0.28%

2 Renaissance Technologies · Jim Simons (founder) CL A 6,560,576 $196.1M 0.30%

3 Citadel Advisors · Ken Griffin CL A 4,730,708 $141.4M 0.02%

4 Citadel Advisors · Ken Griffin CALLCL A 3,934,500 $117.6M 0.02%

5 Bridgewater Associates · Ray Dalio (founder) CL A 3,510,012 $104.9M 0.38%

6 Citadel Advisors · Ken Griffin PUTCL A 2,804,700 $83.8M 0.01%

7 Soros Fund Management · George Soros / Robert Soros CL A 73,440 $2.2M 0.03%

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 CMCSA 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