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#
701–781 of 781Weightsthe May 31, 2026 filing rolled forward on price — an estimate (as of market close, May 31, 2026)
| # | Issuer | Weight |
|---|---|---|
| 701 | City & County Honolulu | 0.01% |
| 702 | Green Bay Area Public School District | 0.01% |
| 703 | Anna Independent School District | 0.01% |
| 704 | Hillsboro School District No. 1J | 0.01% |
| 705 | Kitsap County School District No. 100-C Bremerton | 0.01% |
| 706 | Riverside County Public Financing Authority | 0.00% |
| 707 | Bexar County Hospital District | 0.00% |
| 708 | Cedar Rapids Community School District Infrastructure Sales Services & Use Tax | 0.00% |
| 709 | City of Atlanta Airport Passenger Facility Charge | 0.00% |
| 710 | Alvin Independent School District | 0.00% |
| 711 | Sherman Independent School District | 0.00% |
| 712 | Trinity River Authority Central Regional Wastewater System | 0.00% |
| 713 | Adams & Weld Counties School District No. 27J Brighton | 0.00% |
| 714 | Ohio University | 0.00% |
| 715 | Sacramento Area Flood Control Agency | 0.00% |
| 716 | North Carolina Capital Facilities Finance Agency | 0.00% |
| 717 | Massachusetts Health & Educational Facilities Authority | 0.00% |
| 718 | City of Durham | 0.00% |
| 719 | University of Oklahoma (The) | 0.00% |
| 720 | Central Valley Water Reclamation Facility | 0.00% |
| 721 | City of Winston-Salem | 0.00% |
| 722 | Florida Department of Management Services | 0.00% |
| 723 | Delaware Valley Regional Finance Authority | 0.00% |
| 724 | West Virginia Commissioner of Highways | 0.00% |
| 725 | Waco Educational Finance Corp. | 0.00% |
| 726 | Texas Transportation Commission State Highway 249 System | 0.00% |
| 727 | West Valley-Mission Community College District | 0.00% |
| 728 | Princeton Independent School District | 0.00% |
| 729 | Metropolitan Knoxville Airport Authority | 0.00% |
| 730 | University of North Texas System | 0.00% |
| 731 | Waco Independent School District | 0.00% |
| 732 | Placentia-Yorba Linda Unified School District | 0.00% |
| 733 | Santa Barbara Secondary High School District | 0.00% |
| 734 | Clackamas Community College District | 0.00% |
| 735 | County of Durham | 0.00% |
| 736 | Western Maricopa Education Center District No. 402 | 0.00% |
| 737 | Yosemite Community College District | 0.00% |
| 738 | City of Joliet | 0.00% |
| 739 | City of Clarksville | 0.00% |
| 740 | Greenville-Spartanburg Airport District | 0.00% |
| 741 | Campbell Union School District | 0.00% |
| 742 | City of Mesa | 0.00% |
| 743 | Tyler Independent School District | 0.00% |
| 744 | Seminole County School District Sales Tax | 0.00% |
| 745 | State of Alabama | 0.00% |
| 746 | District of Columbia Income Tax Revenue | 0.00% |
| 747 | Howell Public Schools | 0.00% |
| 748 | Pasadena Independent School District | 0.00% |
| 749 | Massachusetts Department of Transportation | 0.00% |
| 750 | City of Phoenix | 0.00% |
| 751 | County of Howard | 0.00% |
| 752 | Cincinnati City School District | 0.00% |
| 753 | City of Mobile | 0.00% |
| 754 | Buffalo Municipal Water Finance Authority | 0.00% |
| 755 | Upper Arlington City School District | 0.00% |
| 756 | Tri-County Metropolitan Transportation District of Oregon | 0.00% |
| 757 | Clackamas & Washington Counties School District No. 3 | 0.00% |
| 758 | City of Gainesville | 0.00% |
| 759 | Pennsylvania Turnpike Commission Oil Franchise Tax | 0.00% |
| 760 | Norman Y Mineta San Jose International Airport SJC | 0.00% |
| 761 | San Diego Community College District | 0.00% |
| 762 | Campbell Union High School District | 0.00% |
| 763 | State of Iowa | 0.00% |
| 764 | City of Kansas Sanitary Sewer System | 0.00% |
| 765 | County of Westchester | 0.00% |
| 766 | Aledo Independent School District | 0.00% |
| 767 | Midland County Fresh Water Supply District No. 1 | 0.00% |
| 768 | Chicago Transit Authority Capital Grant Receipts | 0.00% |
| 769 | Beverly Hills Unified School District | 0.00% |
| 770 | Commonwealth of Massachusetts Federal Highway Grant Anticipation Note | 0.00% |
| 771 | Southwestern Community College District | 0.00% |
| 772 | Dutchess County Local Development Corp. | 0.00% |
| 773 | County of Adams | 0.00% |
| 774 | City of Memphis | 0.00% |
| 775 | North East Independent School District | 0.00% |
| 776 | California Statewide Communities Development Authority | 0.00% |
| 777 | Sacramento City Financing Authority | 0.00% |
| 778 | River Islands Public Financing Authority | 0.00% |
| 779 | Hidalgo County Regional Mobility Authority | 0.00% |
| 780 | Mendocino-Lake Community College District | 0.00% |
| 781 | Clovis Unified School District | 0.00% |
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.