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#
101–200 of 781Weightsthe May 31, 2026 filing rolled forward on price — an estimate (as of market close, May 31, 2026)
| # | Issuer | Weight |
|---|---|---|
| 101 | State of Michigan Trunk Line | 0.21% |
| 102 | Connecticut State Health & Educational Facilities Authority | 0.21% |
| 103 | Los Angeles Community College District | 0.21% |
| 104 | County of Jefferson | 0.21% |
| 105 | Hampton Roads Transportation Accountability Commission | 0.21% |
| 106 | Metropolitan Transportation Authority Dedicated Tax Fund | 0.20% |
| 107 | Virginia Public Building Authority | 0.20% |
| 108 | Sacramento Municipal Utility District | 0.20% |
| 109 | City & County of Denver | 0.20% |
| 110 | New York Power Authority | 0.20% |
| 111 | Utility Debt Securitization Authority | 0.20% |
| 112 | City of Colorado Springs Utilities System | 0.19% |
| 113 | Orlando Utilities Commission | 0.19% |
| 114 | Foothill-Eastern Transportation Corridor Agency | 0.19% |
| 115 | Oklahoma Turnpike Authority | 0.19% |
| 116 | Hudson Yards Infrastructure Corp. | 0.19% |
| 117 | Northwest Independent School District | 0.18% |
| 118 | Conroe Independent School District | 0.18% |
| 119 | Battery Park City Authority | 0.18% |
| 120 | San Francisco City & County Airport Comm-San Francisco International Airport | 0.18% |
| 121 | Utah Transit Authority | 0.17% |
| 122 | Pennsylvania State University (The) | 0.17% |
| 123 | Massachusetts Water Resources Authority | 0.17% |
| 124 | Texas Transportation Finance Corp. | 0.17% |
| 125 | Clark County School District | 0.17% |
| 126 | Illinois Municipal Electric Agency | 0.17% |
| 127 | Permanent University Fund - University of Texas System | 0.17% |
| 128 | Massachusetts School Building Authority | 0.17% |
| 129 | Long Beach Unified School District | 0.17% |
| 130 | City of San Antonio | 0.17% |
| 131 | Sales Tax Securitization Corp. | 0.17% |
| 132 | Los Angeles County Public Works Financing Authority | 0.17% |
| 133 | Washoe County School District | 0.16% |
| 134 | JEA Water & Sewer System | 0.16% |
| 135 | County of Harris | 0.16% |
| 136 | City & County of Honolulu | 0.16% |
| 137 | Comal Independent School District | 0.16% |
| 138 | City of Atlanta Water & Wastewater | 0.16% |
| 139 | City of Austin | 0.15% |
| 140 | Prosper Independent School District | 0.15% |
| 141 | City of Houston | 0.15% |
| 142 | Michigan State University | 0.15% |
| 143 | Intermountain Power Agency | 0.15% |
| 144 | Triborough Bridge & Tunnel Authority Sales Tax | 0.15% |
| 145 | Metropolitan Atlanta Rapid Transit Authority | 0.15% |
| 146 | School Board of Miami-Dade County (The) | 0.14% |
| 147 | Louisville & Jefferson County Metropolitan Sewer District | 0.14% |
| 148 | Missouri Highway & Transportation Commission | 0.14% |
| 149 | County of Clark Department of Aviation | 0.14% |
| 150 | Leander Independent School District | 0.14% |
| 151 | Alabama Federal Aid Highway Finance Authority | 0.14% |
| 152 | City of Austin Electric Utility | 0.14% |
| 153 | County of Miami-Dade Water & Sewer System | 0.14% |
| 154 | Texas Transportation Commission | 0.14% |
| 155 | Regional Transportation District Sales Tax | 0.14% |
| 156 | City of Springfield Electric | 0.14% |
| 157 | Chicago Transit Authority Sales Tax Receipts Fund | 0.14% |
| 158 | Denver City & County School District No. 1 | 0.14% |
| 159 | Ohio Water Development Authority | 0.13% |
| 160 | Kansas Development Finance Authority | 0.13% |
| 161 | City of Austin Water & Wastewater System | 0.13% |
| 162 | East Bay Municipal Utility District Water System | 0.13% |
| 163 | North Texas Municipal Water District Water System | 0.13% |
| 164 | Houston Higher Education Finance Corp. | 0.13% |
| 165 | Municipal Electric Authority of Georgia | 0.13% |
| 166 | City of Springfield | 0.13% |
| 167 | E-470 Public Highway Authority | 0.13% |
| 168 | State of New Mexico Severance Tax Permanent Fund | 0.12% |
| 169 | State of Mississippi | 0.12% |
| 170 | Texas State University System | 0.12% |
| 171 | State of Kansas Department of Transportation | 0.12% |
| 172 | County of Clark | 0.12% |
| 173 | City of Boston | 0.12% |
| 174 | Cypress-Fairbanks Independent School District | 0.12% |
| 175 | State of California Department of Water Resources | 0.12% |
| 176 | Pittsburgh Water & Sewer Authority | 0.12% |
| 177 | Washington Suburban Sanitary Commission | 0.12% |
| 178 | School District of Broward County | 0.12% |
| 179 | Minnesota Public Facilities Authority State Revolving Fund | 0.12% |
| 180 | Indiana Municipal Power Agency | 0.11% |
| 181 | Lewisville Independent School District | 0.11% |
| 182 | State of Oregon | 0.11% |
| 183 | East County Advanced Water Purification Joint Powers Authority | 0.11% |
| 184 | Missouri Joint Municipal Electric Utility Commission | 0.11% |
| 185 | State of Utah | 0.11% |
| 186 | San Diego Public Facilities Financing Authority | 0.11% |
| 187 | Metropolitan Water District of Southern California | 0.11% |
| 188 | Iowa Finance Authority | 0.11% |
| 189 | Metropolitan Water Reclamation District of Greater Chicago | 0.11% |
| 190 | County of Guilford | 0.11% |
| 191 | American Municipal Power, Inc. | 0.11% |
| 192 | North Carolina Turnpike Authority | 0.11% |
| 193 | New York City Transitional Finance Authority Future Tax Secured Revenue | 0.11% |
| 194 | Riverside County Transportation Commission | 0.11% |
| 195 | Henry County School District | 0.11% |
| 196 | Chabot-Las Positas Community College District | 0.10% |
| 197 | Lee County School Board (The) | 0.10% |
| 198 | Texas A&M University | 0.10% |
| 199 | Multnomah County School District No. 1J Portland | 0.10% |
| 200 | State of Louisiana Gasoline & Fuels Tax | 0.10% |
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.