MUB · iShares National Muni Bond ETF

986 holdings · expense ratio 0.05% · top 10 = 17.1% · concentration score 7.4/100 · holdings as of 2026-09-08

Top 25 holdings

#	Holding	Weight
1	13063DCalifornia St	2.61%
2	64972JNew York N Y City Transitional	2.48%
3	64972GNew York N Y City Mun Wtr Fin	1.86%
4	64971XNew York N Y City Transitional	1.73%
5	57582RMassachusetts St	1.61%
6	91412HUniversity Calif Revs	1.57%
7	64990FNew York St Dorm Auth St Pers	1.42%
8	59261AMetropolitan Transn Auth N Y R	1.29%
9	13063ECalifornia St	1.28%
10	64966SNew York N Y	1.19%
11	64966QNew York N Y	1.18%
12	93974EWashington St	1.16%
13	646136New Jersey St Transn Tr Fd Auth	1.07%
14	70914PPennsylvania St	0.99%
15	650028New York St Twy Auth St Pers I	0.98%
16	452153Illinois St	0.97%
17	89602HTriborough Brdg & Tunl Auth N	0.90%
18	544532Los Angeles Calif Dept Wtr & P	0.85%
19	20772KConnecticut St	0.85%
20	64613CNew Jersey St Transn Tr Fd Aut	0.82%
21	574193Maryland St	0.79%
22	650036New York St Urban Dev Corp Rev	0.78%
23	544647Los Angeles Calif Uni Sch Dist	0.76%
24	64990ANew York St Dorm Auth Sales Ta	0.75%
25	64990KNew York St Dorm Auth St Pers	0.73%

Sector split

State Tax-Backed

30.3%

Local Tax-Backed

19.5%

Utilities

16.8%

Transportation

10.9%

School Districts

9.9%

Education

8.6%

Cash and/or Derivatives

4.0%

Prerefund/Escrow

0.4%

Other Industries

0.1%

Corporate Muni

0.0%

Housing

0.0%

Other

0.0%

What has changed

Between July 2026 and September 2026, from 3 months on record:

	July 2026	September 2026	Change
Largest holding	13063D2.7%	13063D2.6%	no change
Top 10 holdings	17.1%	17.1%	−0.1pp
Positions published	974	986	+12

One point per month, taken from the issuer's published holdings file. Tracking began July 2026 — figures from before then were not retained.

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Holdings from the issuer's published holdings file, as of 2026-09-08. Weights are fractions of the fund. Check it against its SEC filings. Diagnostics, not advice — x-ray your whole portfolio.