Ticker · held by 4 filers

MUB

ISHARES TR

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

Total value held

$78.4M

Total shares

733,351

Filers holding

4 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding MUB

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink NATIONAL MUN ETF 275,601 $29.4M 0.00%

2 Soros Fund Management · George Soros / Robert Soros NATIONAL MUN ETF 241,400 $25.9M 0.30%

3 Renaissance Technologies · Jim Simons (founder) NATIONAL MUN ETF 128,850 $13.8M 0.02%

4 Citadel Advisors · Ken Griffin CALLNATIONAL MUN ETF 47,300 $5.1M 0.00%

5 Citadel Advisors · Ken Griffin PUTNATIONAL MUN ETF 40,200 $4.3M 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 MUB 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