MUB
iShares National Muni Bond ETFETF · Bonds$105.56−$0.31 (-0.29%)as of Aug 17, 3:55 PM ET
☾ After hours:$105.56+0.00%3:59 PM ET
MUB holdings (2026)
All 781 positions in iShares National Muni Bond ETF, ranked by portfolio weight — led by State of California at 4.5%. Positions are aggregated by issuer — all of an issuer's bonds combine into one line, weights from the fund's own SEC N-PORT filing. Not investment advice.
Weights are the May 31, 2026 SEC filing rolled forward on each holding's price move (as of market close, May 31, 2026) — an estimate of today, not the filed figure. Switch the table below to see them exactly as filed.
Holdings
781
positions in the latest filing
Largest holding
4.5%
State of California · estimated today
Top 10 weight
27%
concentration · estimated today
Filed
May 31, 2026
SEC N-PORT report date
Top 10 holdings#
IssuerWeight
1State of California
4.5%
2New York City Transitional Finance Authority Future Tax Secured
4.2%
3New York State Dormitory Authority
3.7%
4City of New York
2.9%
5Commonwealth of Massachusetts
2.2%
6New Jersey Transportation Trust Fund Authority
2.0%
7New York City Municipal Water Finance Authority
2.0%
8State of Washington
1.8%
9University of California
1.6%
10Triborough Bridge & Tunnel Authority
1.6%
MUB holdings by weight#
1–100 of 781Weightsthe May 31, 2026 filing rolled forward on price — an estimate (as of market close, May 31, 2026)
| # | Issuer | Weight |
|---|---|---|
| 1 | State of California | 4.48% |
| 2 | New York City Transitional Finance Authority Future Tax Secured | 4.20% |
| 3 | New York State Dormitory Authority | 3.75% |
| 4 | City of New York | 2.92% |
| 5 | Commonwealth of Massachusetts | 2.17% |
| 6 | New Jersey Transportation Trust Fund Authority | 1.99% |
| 7 | New York City Municipal Water Finance Authority | 1.99% |
| 8 | State of Washington | 1.81% |
| 9 | University of California | 1.65% |
| 10 | Triborough Bridge & Tunnel Authority | 1.57% |
| 11 | State of Illinois | 1.49% |
| 12 | Metropolitan Transportation Authority | 1.36% |
| 13 | BlackRock Liquidity Funds | 1.28% |
| 14 | Empire State Development Corp. | 1.25% |
| 15 | Pennsylvania Turnpike Commission | 1.22% |
| 16 | New York State Thruway Authority | 1.12% |
| 17 | Commonwealth of Pennsylvania | 1.08% |
| 18 | Los Angeles Department of Water & Power | 0.95% |
| 19 | Los Angeles Unified School District | 0.92% |
| 20 | State of Connecticut | 0.92% |
| 21 | Texas Water Development Board | 0.80% |
| 22 | State of Maryland | 0.78% |
| 23 | State of Connecticut Special Tax | 0.71% |
| 24 | North Texas Tollway Authority | 0.66% |
| 25 | California State Public Works Board | 0.65% |
| 26 | Port Authority of New York & New Jersey | 0.63% |
| 27 | Illinois State Toll Highway Authority | 0.61% |
| 28 | State of Minnesota | 0.60% |
| 29 | District of Columbia | 0.60% |
| 30 | Chicago O'Hare International Airport | 0.58% |
| 31 | New Jersey Turnpike Authority | 0.58% |
| 32 | Board of Regents of the University of Texas System | 0.56% |
| 33 | State of Georgia | 0.56% |
| 34 | San Diego Unified School District | 0.55% |
| 35 | County of Miami-Dade | 0.51% |
| 36 | Long Island Power Authority | 0.50% |
| 37 | Massachusetts Development Finance Agency | 0.48% |
| 38 | State of Texas | 0.48% |
| 39 | State of New Jersey | 0.46% |
| 40 | New Jersey Educational Facilities Authority | 0.45% |
| 41 | Virginia College Building Authority | 0.45% |
| 42 | State of Wisconsin | 0.44% |
| 43 | South Carolina Public Service Authority | 0.44% |
| 44 | District of Columbia Income Tax | 0.44% |
| 45 | Metropolitan Government of Nashville & Davidson County | 0.43% |
| 46 | Los Angeles Department of Water & Power Water System | 0.42% |
| 47 | State of Maryland Department of Transportation | 0.40% |
| 48 | Bay Area Toll Authority | 0.39% |
| 49 | Energy Northwest | 0.38% |
| 50 | Lower Colorado River Authority | 0.37% |
| 51 | Salt River Project Agricultural Improvement & Power District | 0.37% |
| 52 | Dallas Independent School District | 0.37% |
| 53 | City of Chicago | 0.36% |
| 54 | State of North Carolina | 0.35% |
| 55 | City of San Antonio Electric & Gas Systems | 0.34% |
| 56 | City of Philadelphia | 0.34% |
| 57 | New Jersey Economic Development Authority | 0.34% |
| 58 | Dallas Fort Worth International Airport | 0.31% |
| 59 | Commonwealth of Massachusetts Transportation Fund | 0.31% |
| 60 | Central Texas Turnpike System | 0.30% |
| 61 | Kentucky State Property & Building Commission | 0.30% |
| 62 | California State University | 0.30% |
| 63 | County of King | 0.29% |
| 64 | City of Houston Combined Utility System | 0.29% |
| 65 | City of Seattle | 0.29% |
| 66 | District of Columbia Water & Sewer Authority | 0.29% |
| 67 | County of Montgomery | 0.29% |
| 68 | New York City Transitional Finance Authority Building Aid | 0.29% |
| 69 | Indiana Finance Authority | 0.29% |
| 70 | Ohio Water Development Authority Water Pollution Control Loan Fund | 0.28% |
| 71 | State of Illinois Sales Tax | 0.28% |
| 72 | Washington Metropolitan Area Transit Authority | 0.28% |
| 73 | State of Ohio | 0.27% |
| 74 | Illinois Finance Authority | 0.27% |
| 75 | Great Lakes Water Authority Water Supply System | 0.27% |
| 76 | Austin Independent School District | 0.27% |
| 77 | County of Prince George's | 0.27% |
| 78 | City of Dallas | 0.26% |
| 79 | State of Delaware | 0.26% |
| 80 | San Antonio Water System | 0.26% |
| 81 | California Educational Facilities Authority | 0.26% |
| 82 | Miami-Dade County Educational Facilities Authority | 0.26% |
| 83 | City of Los Angeles Department of Airports | 0.26% |
| 84 | Massachusetts Bay Transportation Authority Sales Tax | 0.25% |
| 85 | State of Louisiana | 0.25% |
| 86 | City of San Francisco | 0.25% |
| 87 | City of Phoenix Civic Improvement Corp. | 0.25% |
| 88 | Grand Parkway Transportation Corp. | 0.24% |
| 89 | Ohio State University (The) | 0.24% |
| 90 | Los Angeles County Metropolitan Transportation Authority Sales Tax | 0.24% |
| 91 | Omaha Public Power District | 0.24% |
| 92 | Private Colleges & Universities Authority | 0.24% |
| 93 | California Infrastructure & Economic Development Bank | 0.24% |
| 94 | New York State Environmental Facilities Corp. | 0.24% |
| 95 | County of Fairfax | 0.24% |
| 96 | Southern California Public Power Authority | 0.23% |
| 97 | Virginia Commonwealth Transportation Board | 0.23% |
| 98 | Michigan State Building Authority | 0.23% |
| 99 | Central Florida Expressway Authority | 0.22% |
| 100 | State of Hawaii | 0.22% |
Methodology#
Holdings and weights are sourced from the fund's portfolio as disclosed to the SEC on Form N-PORT — a public filing. Portfolio filings are quarterly (public ~60 days after quarter end), so we anchor on the latest one and roll each weight forward daily by that holding's price move, keeping the numbers current between filings; positions in stocks ChartRow doesn't track carry their filed weight unchanged and show "—" where we have no data. Returns are total returns (dividends reinvested). One row per issuer: a bond fund holds many individual bonds from the same borrower, so we combine them — every U.S. Treasury note and bond becomes one line, as does each corporate issuer — which is how the fund's own literature presents the portfolio. Past performance does not predict future returns; not investment advice.
FAQ#
- What are the top 10 holdings of MUB?
- MUB's top 10 holdings are State of California, 4.5%; New York City Transitional Finance Authority Future Tax Secured, 4.2%; New York State Dormitory Authority, 3.7%; City of New York, 2.9%; Commonwealth of Massachusetts, 2.2%; New Jersey Transportation Trust Fund Authority, 2.0%; New York City Municipal Water Finance Authority, 2.0%; State of Washington, 1.8%; University of California, 1.6%; Triborough Bridge & Tunnel Authority, 1.6% — together about 27% of the fund, per its May 31, 2026 SEC filing with weights rolled forward to today.
- How many holdings does MUB have?
- iShares National Muni Bond ETF (MUB) held 781 positions as of its latest SEC N-PORT filing (May 31, 2026).
- How current are MUB's holdings?
- Funds disclose their full portfolio to the SEC on Form N-PORT; the quarter-end report becomes public about 60 days later. ChartRow anchors on the latest public filing (May 31, 2026) and rolls each weight forward daily by that holding's price move, so the weights shown estimate today rather than the filing date.
- Is ChartRow affiliated with MUB or BlackRock?
- No. ChartRow is independent and is not affiliated with, sponsored by, or endorsed by BlackRock or iShares National Muni Bond ETF. Everything on this page is derived independently from the fund's public SEC filings; fund names and trademarks belong to their owners. For information only — not investment advice.