Total Holdings
7,321
As of Oct 4, 2026
iShares National Muni Bond ETF
MUBNYSEARCABlackRockFixed Income
$102.48Today:- (-)1Y −4.60%
As of Oct 15, 2026 close
- Assets (AUM)
- $45.54B
- Expense ratio
- 0.05%
- Dividend yield
- 3.33%
- Holdings
- 7,321
- 52-week range
- $100.07$109.00
- Volume (live)
- -
- Avg. volume (3M)
- 16.92M
MUB ETF Holdings: iShares National Muni Bond ETF
Every listed position with its portfolio weight, plus sector breakdown and geographic exposure for this Fixed Income ETF. Analyze fund diversification and concentration.
Top 10 Holdings
-
Share of fund assets
Assets (AUM)
$45.54B
Total fund assets
Expense Ratio
0.05%
Annual management fee
Portfolio Allocations
Distribution breakdown by sector, asset type, and geographic region. Understand the fund's diversification strategy across markets and asset classes.
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Top 7 of 7,321 MUB Holdings by Portfolio Weight
Holdings as of Oct 4, 2026. Ticker, name, asset type and portfolio weight for each position. Fund disclosures available to us list the largest 7 positions.
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| # | Symbol | Name | Type | Weight |
|---|---|---|---|---|
| 1 | NMFQS:MCSXX | - | Cash | 0.26% |
| 2 | TX.SANWTR 05.01.2055 | SAN ANTONIO TEX WTR REV - 2.4 2055-05-01 | Stock | 0.15% |
| 3 | NY.TRBTRN 01.01.2035 | TRIBOROUGH BRDG & TUNL AUTH NY - 2.4 2035-01-01 | Stock | 0.13% |
| 4 | WA.KINUTL 01.01.2042 | KING CNTY WASH SWR REV - 2.43 2042-01-01 | Stock | 0.11% |
| 5 | NY.TRBTRN 01.01.2032 | TRIBOROUGH BRDG & TUNL AUTH N - 3.99 2032-01-01 | Stock | 0.11% |
| 6 | TX.HOUUTL 05.15.2034 | HOUSTON TEX UTIL SYS REV - 3.96 2034-05-15 | Stock | 0.10% |
| 7 | WA.SEAPWR 11.01.2046 | SEATTLE WASH MUN LT & PWR REV - 2.4 2046-11-01 | Stock | 0.10% |
Source: Fund holdings disclosures. Data as of Oct 4, 2026. Data sources and methodology
Frequently Asked Questions About iShares National Muni Bond ETF Holdings
What are the top holdings in MUB?
As of Oct 4, 2026, iShares National Muni Bond ETF (MUB) holds 7,321 securities. The largest are NMFQS:MCSXX (0.26%), SAN ANTONIO TEX WTR REV - 2.4 2055-05-01 (0.15%), TRIBOROUGH BRDG & TUNL AUTH NY - 2.4 2035-01-01 (0.13%). The holdings table lists each position by portfolio weight with its ticker, name and asset type.
How concentrated is MUB's portfolio?
Portfolio concentration is measured by the weight of top holdings. A concentrated portfolio has fewer large positions with higher individual weights, while a diversified portfolio distributes holdings more evenly. Review MUB's holdings table to analyze concentration risk.
What is MUB's sector allocation?
The Sector Allocation chart shows how MUB distributes investments across different industries like Technology, Healthcare, Financials, and more. This sector exposure helps understand the fund's industry diversification strategy.
What countries does MUB invest in?
MUB's geographic exposure is shown in the Countries tab under Portfolio Allocations. This reveals the fund's international diversification and exposure to different regions and global markets.
How diversified is MUB ETF?
MUB's diversification can be assessed by reviewing its 7,321 holdings (as of Oct 4, 2026), sector allocation, and geographic exposure. A well-diversified ETF spreads investments across multiple securities, sectors, and regions to reduce concentration risk.