ETF · holdings as filed 2026-05-31
What's inside MUB?
iShares National Muni Bond ETF
- Holdings
- 6,654
- positions in the fund
- Top 10
- 3%
- of fund assets
- Expense ratio
- 0.05%
- net, per year
- Fund size
- $45B
- total net assets
Top 20 holdings
| Rank | Logo | Ticker / Name | Weight | |
|---|---|---|---|---|
| 1 | M  | MCSXXBLCKRCK LIQ FD MUNICSH-INST | 1.28% | |
| 2 | BOND | Tx Sys Univ Brd Of-B | 0.19% | |
| 3 | BOND | New York St Twy Auth | 0.15% | |
| 4 | T  | TX SANWTR 05.01.2055SAN ANTONIO-D | 0.14% | |
| 5 | N  | NY TRBTRN 01.01.2032TRIBOROUGH BRIDGE-B2 | 0.14% | |
| 6 | N  | NY NYCGEN 11.01.2044NYC TRANS FIN AUTH-C4 | 0.13% | |
| 7 | BOND | New York St Dorm Auth | 0.13% | |
| 8 | BOND | Ohio St Univ-A-Ref | 0.13% | |
| 9 | BOND | Houston Hgr Edu Fin C | 0.13% | |
| 10 | BOND | Northwest Isd | 0.13% | |
| 11 | BOND | New Jersey St-A | 0.13% | |
| 12 | BOND | California St-Bid -B | 0.12% | |
| 13 | BOND | Washington St-R-2022 | 0.12% | |
| 14 | P  | PA PASTRN 12.01.2038PA TPK COMM-SECOND | 0.12% | |
| 15 | BOND | Chicago Transit Auth | 0.12% | |
| 16 | BOND | E Co Awp Jt Pwrs-A-1 | 0.11% | |
| 17 | BOND | Orlando Utils-Var-1 | 0.11% | |
| 18 | N  | NY LSLPWR 09.01.2042LONG ISLAND AUTH-A | 0.11% | |
| 19 | BOND | Washoe Co Sd-C-Impt | 0.11% | |
| 20 | BOND | Nj Eductnl Facs-A | 0.11% |
Top holdings — United States
Your 10 largest positions in this country
1
M
MCSXXBLCKRCK LIQ FD MUNICSH-INST
1.28%2
BOND
Tx Sys Univ Brd Of-B
0.19%3
BOND
New York St Twy Auth
0.15%4
T
TX SANWTR 05.01.2055SAN ANTONIO-D
0.14%5
N
NY TRBTRN 01.01.2032TRIBOROUGH BRIDGE-B2
0.14%6
N
NY NYCGEN 11.01.2044NYC TRANS FIN AUTH-C4
0.13%7
BOND
New York St Dorm Auth
0.13%8
BOND
Ohio St Univ-A-Ref
0.13%9
BOND
Houston Hgr Edu Fin C
0.13%10
BOND
Northwest Isd
0.13%Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-05-31); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.
Informational and educational only — not investment advice.