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iShares National Muni Bond ETF (MUB)

SEC CIK 1100663 · Series S000018861 · Portfolio as of 2026-05-31

Net assets
$44.95B
Holdings
6654
Snapshots
27
History since
2019-11-30

Top holdings

SecurityValueWeight
BlackRock Liquidity Funds · MCSXX$574.3M1.28%
Board of Regents of the University of Texas System · TX UNIHGR 5 08/15/2036$86.7M0.19%
New York State Thruway Authority · NY NYSTRN 5 03/15/2048$68.6M0.15%
San Antonio Water System · TX SANWTR 05/01/2055$64.0M0.14%
Triborough Bridge & Tunnel Authority · NY TRBTRN 01/01/2032$61.0M0.14%
New York City Transitional Finance Authority Future Tax Secured · NY NYCGEN 11/01/2044$59.4M0.13%
New York State Dormitory Authority · NY NYSHGR 4 02/15/2047$59.3M0.13%
Ohio State University (The) · OH OHSHGR 5 06/01/2035$57.8M0.13%
Houston Higher Education Finance Corp. · TX HOUHGR 5 05/15/2034$57.7M0.13%
Northwest Independent School District · TX NWTSCD 5.25 02/15/2055$57.4M0.13%

Sector exposure

fixed income
95.2%
other
4.8%

Recent monthly returns

2025-12
+0.20%
2026-01
+0.76%
2026-02
+1.21%
2026-03
-2.16%
2026-04
+1.08%
2026-05
+0.35%

From N-PORT Part B, units verified by net-asset reconciliation.

Get this data via API

curl "https://api.fundlens.io/v1/funds/MUB/holdings" \
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Full holdings, every historical snapshot, point-in-time queries, monthly returns and flows — free tier available, no card required.

Source: SEC EDGAR Form N-PORT. Data is quarterly with a regulatory filing lag; this page shows the most recent public filing. Not investment advice.