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#
201–300 of 781Weightsthe May 31, 2026 filing rolled forward on price — an estimate (as of market close, May 31, 2026)
| # | Issuer | Weight |
|---|---|---|
| 201 | City of Portland | 0.10% |
| 202 | City of Los Angeles | 0.10% |
| 203 | San Mateo County Community College District | 0.10% |
| 204 | Plano Independent School District | 0.10% |
| 205 | Alameda Corridor Transportation Authority | 0.10% |
| 206 | Georgia State Road & Tollway Authority | 0.10% |
| 207 | City of Columbus | 0.10% |
| 208 | County of Williamson | 0.10% |
| 209 | Denton Independent School District | 0.09% |
| 210 | JobsOhio Beverage System | 0.09% |
| 211 | County of Multnomah | 0.09% |
| 212 | South Carolina Transportation Infrastructure Bank | 0.09% |
| 213 | San Francisco City & County Public Utilities Commission Wastewater | 0.09% |
| 214 | Lamar Consolidated Independent School District | 0.09% |
| 215 | Arizona Board of Regents | 0.09% |
| 216 | Dallas Area Rapid Transit | 0.09% |
| 217 | Wylie Independent School District | 0.09% |
| 218 | Metropolitan Council | 0.09% |
| 219 | Ohio Turnpike & Infrastructure Commission | 0.09% |
| 220 | Georgia Ports Authority | 0.09% |
| 221 | State of Colorado | 0.09% |
| 222 | Monroe County Industrial Development Corp. | 0.09% |
| 223 | County of Anne Arundel | 0.09% |
| 224 | Gwinnett County School District | 0.09% |
| 225 | City & County of Denver Airport System | 0.09% |
| 226 | City of Charlotte Water & Sewer System | 0.09% |
| 227 | Port Authority of Houston of Harris County Texas | 0.09% |
| 228 | Metropolitan Nashville Airport Authority (The) | 0.08% |
| 229 | Municipal Improvement Corp. of Los Angeles | 0.08% |
| 230 | City of New Orleans | 0.08% |
| 231 | Las Vegas Valley Water District | 0.08% |
| 232 | University of Massachusetts Building Authority | 0.08% |
| 233 | Los Angeles County Metropolitan Transportation Authority Sales Tax Revenue | 0.08% |
| 234 | City & County Honolulu Wastewater System | 0.08% |
| 235 | County of Ector | 0.08% |
| 236 | Northern California Sanitation Agencies Financing Authority | 0.08% |
| 237 | JEA Electric System | 0.08% |
| 238 | State of Florida Department of Transportation Turnpike System | 0.08% |
| 239 | Tampa Bay Water | 0.08% |
| 240 | State of Oregon Department of Transportation | 0.08% |
| 241 | University of Connecticut | 0.08% |
| 242 | University of Colorado | 0.08% |
| 243 | Oklahoma City Water Utilities Trust | 0.08% |
| 244 | Alabama Public School & College Authority | 0.08% |
| 245 | County of Hennepin | 0.08% |
| 246 | Port of Tacoma | 0.08% |
| 247 | Auburn University | 0.08% |
| 248 | Carrollton-Farmers Branch Independent School District | 0.08% |
| 249 | Metropolitan Washington Airports Authority Dulles Toll Road | 0.08% |
| 250 | Santa Clara Unified School District | 0.08% |
| 251 | San Francisco Bay Area Rapid Transit District | 0.08% |
| 252 | City of Salt Lake City | 0.08% |
| 253 | Virginia Public School Authority | 0.08% |
| 254 | Chaffey Joint Union High School District | 0.08% |
| 255 | Santa Monica-Malibu Unified School District | 0.07% |
| 256 | Indianapolis Local Public Improvement Bond Bank | 0.07% |
| 257 | Lansing Board of Water & Light | 0.07% |
| 258 | New York City Transitional Finance Authority | 0.07% |
| 259 | Fort Bend Independent School District | 0.07% |
| 260 | Palm Beach County School District | 0.07% |
| 261 | Massachusetts Clean Water Trust (The) | 0.07% |
| 262 | County of Wake | 0.07% |
| 263 | City of Fayetteville | 0.07% |
| 264 | Maryland State Transportation Authority | 0.07% |
| 265 | City of Aurora | 0.07% |
| 266 | Riverside County Transportation Commission Sales Tax | 0.07% |
| 267 | Pasco County School Board | 0.07% |
| 268 | Santa Monica Community College District | 0.07% |
| 269 | Mesa County Valley School District No. 51 Grand Junction | 0.07% |
| 270 | Pennsylvania Higher Educational Facilities Authority | 0.07% |
| 271 | Idaho Housing & Finance Association | 0.07% |
| 272 | City of Chicago Waterworks | 0.07% |
| 273 | Nassau County Interim Finance Authority | 0.07% |
| 274 | Georgetown Independent School District | 0.07% |
| 275 | Chicago Midway International Airport | 0.07% |
| 276 | Permanent University Fund - Texas A&M University System | 0.06% |
| 277 | University of Alabama (The) | 0.06% |
| 278 | New Hampshire Health & Education Facilities Authority | 0.06% |
| 279 | City of Charlotte | 0.06% |
| 280 | University of Pittsburgh-of the Commonwealth System of Higher Education | 0.06% |
| 281 | State of New Mexico | 0.06% |
| 282 | Rhode Island Commerce Corp. | 0.06% |
| 283 | Midland Independent School District | 0.06% |
| 284 | Clear Creek Independent School District | 0.06% |
| 285 | South Florida Water Management District | 0.06% |
| 286 | Wisconsin Department of Transportation | 0.06% |
| 287 | County of Hamilton | 0.06% |
| 288 | Peace River Manasota Regional Water Supply Authority | 0.06% |
| 289 | Humble Independent School District | 0.06% |
| 290 | San Francisco Bay Area Rapid Transit District Sales Tax | 0.06% |
| 291 | Metropolitan Government Nashville & Davidson County Health & Educational Facilities Board | 0.06% |
| 292 | Oklahoma Water Resources Board | 0.06% |
| 293 | Irvine Ranch Water District | 0.06% |
| 294 | Klein Independent School District | 0.06% |
| 295 | City of Atlanta Department of Aviation | 0.06% |
| 296 | Arizona Department of Transportation State Highway Fund | 0.06% |
| 297 | El Camino Community College District | 0.06% |
| 298 | Chesapeake Bay Bridge & Tunnel District | 0.06% |
| 299 | Contra Costa Community College District | 0.06% |
| 300 | State of Nevada | 0.06% |
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.