MUB · ARCA · ETF
iShares National Muni Bond ETF (MUB) Price, Holdings & Fees
iShares National Muni Bond ETF (MUB) closed at $514.11 on Oct 9, 2026, up 0.91% from the previous close of $509.46.
Share price, past year
1Y +41.12%Monthly closing prices
| Date | Close |
|---|---|
| Oct 9, 2026 | $514.11 |
| Sep 30, 2026 | $525.86 |
| Aug 31, 2026 | $542.61 |
| Jul 31, 2026 | $514.37 |
| Jun 30, 2026 | $514.95 |
| May 29, 2026 | $484.30 |
| Apr 30, 2026 | $456.03 |
| Mar 31, 2026 | $429.43 |
| Feb 27, 2026 | $439.12 |
| Jan 30, 2026 | $412.19 |
| Dec 31, 2025 | $403.38 |
| Nov 28, 2025 | $407.31 |
| Oct 31, 2025 | $382.97 |
Key statistics
- Expense ratio
- 0.05%
- as of Feb 28, 2026
- Net assets
- $45B
- as of May 31, 2026
- Holdings
- 6,654
- as of May 31, 2026
- 52-week range
- $357.96 – $549.97
iShares National Muni Bond ETF's expense ratio is 0.05%: $5.00 a year on $10,000 invested.
Holdings
iShares National Muni Bond ETF held 6,654 investments worth $44.95B as of May 31, 2026. Its largest holding was BlackRock Liquidity Funds, at 1.28% of the fund.
| # | Holding | % of fund | Value |
|---|---|---|---|
| 1 | BlackRock Liquidity Funds | 1.28% | $574.31M |
| 2 | Board of Regents of the University of Texas System | 0.19% | $86.65M |
| 3 | New York State Thruway Authority | 0.15% | $68.62M |
| 4 | San Antonio Water System | 0.14% | $63.98M |
| 5 | Triborough Bridge & Tunnel Authority | 0.14% | $60.97M |
| 6 | New York City Transitional Finance Authority Future Tax Secured | 0.13% | $59.40M |
| 7 | New York State Dormitory Authority | 0.13% | $59.35M |
| 8 | Ohio State University (The) | 0.13% | $57.75M |
| 9 | Houston Higher Education Finance Corp. | 0.13% | $57.66M |
| 10 | Northwest Independent School District | 0.13% | $57.41M |
| 11 | State of New Jersey | 0.13% | $56.45M |
| 12 | State of California | 0.12% | $55.88M |
| 13 | State of Washington | 0.12% | $55.48M |
| 14 | Pennsylvania Turnpike Commission | 0.12% | $52.72M |
| 15 | Chicago Transit Authority Sales Tax Receipts Fund | 0.11% | $51.49M |
| 16 | East County Advanced Water Purification Joint Powers Authority | 0.11% | $50.36M |
| 17 | Long Island Power Authority | 0.11% | $50.00M |
| 18 | Orlando Utilities Commission | 0.11% | $50.00M |
| 19 | Washoe County School District | 0.11% | $49.26M |
| 20 | New Jersey Educational Facilities Authority | 0.11% | $49.17M |
| 21 | State of Illinois | 0.11% | $48.84M |
| 22 | Commonwealth of Massachusetts | 0.11% | $48.25M |
| 23 | State of California | 0.11% | $47.86M |
| 24 | Commonwealth of Massachusetts | 0.10% | $46.40M |
| 25 | New York City Municipal Water Finance Authority | 0.10% | $46.30M |
Top 25 of 6,654 holdings, as of May 31, 2026. Percentages are of the fund's net assets.
What the fund owns
| Asset type | % of fund |
|---|---|
| Bonds and other debt | 95.56% |
| Cash and short-term investments | 3.97% |
| Country | % of fund |
|---|---|
| United States | 99.53% |
Shares of net assets from the fund's N-PORT report. Funds that borrow can add up to more than 100%, with borrowing (such as repurchase agreements) shown as a negative share.
Monthly total returns
Over the 3 months to May 31, 2026, iShares National Muni Bond ETF's total return was −0.76%, as reported to the SEC.
| Month | Total return |
|---|---|
| May 31, 2026 | +0.35% |
| Apr 30, 2026 | +1.08% |
| Mar 31, 2026 | −2.16% |
The fund's own total returns as reported to the SEC (N-PORT), including reinvested distributions. Not the sample prices above.
Fund profile
- Name
- iShares National Muni Bond ETF
- Ticker
- MUB
- Exchange
- ARCA
- Fund type
- ETF
- Trust
- iSHARES TRUST
- SEC series ID
- S000018861
- SEC CIK
- 0001100663
- Fractional shares
- Yes
Recent SEC filings
- Jul 24, 2026
- Oct 5, 2026
- 485BPOSProspectus updateSep 14, 2026
- 485BPOSProspectus updateAug 21, 2026
- 485BPOSProspectus updateJul 27, 2026
- 485BPOSProspectus updateJul 7, 2026
- Jul 2, 2026
- Jul 2, 2026
Shareholder reports and prospectuses are filed by iSHARES TRUST, the trust behind iShares National Muni Bond ETF, and cover all of its funds.
Frequently asked questions
What is MUB's price?
iShares National Muni Bond ETF (MUB) closed at $514.11 on Oct 9, 2026, up 0.91% from the previous close of $509.46.
What is MUB's expense ratio?
iShares National Muni Bond ETF's expense ratio is 0.05%: $5.00 a year on $10,000 invested.
What does MUB hold?
iShares National Muni Bond ETF held 6,654 investments worth $44.95B as of May 31, 2026. Its largest holding was BlackRock Liquidity Funds, at 1.28% of the fund. Its five largest holdings were BlackRock Liquidity Funds, Board of Regents of the University of Texas System, New York State Thruway Authority, San Antonio Water System, Triborough Bridge & Tunnel Authority.
How has MUB performed?
Over the 3 months to May 31, 2026, iShares National Muni Bond ETF's total return was −0.76%, as reported to the SEC.
Sources and methodology
Holdings, net assets and monthly returns come from the fund's N-PORT filing with the SEC, as of May 31, 2026 (filed Jul 24, 2026). The expense ratio is from the fund's prospectus or shareholder report, as of Feb 28, 2026. Prices are generated sample data for development. Data sources and disclosures