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#
601–700 of 781Weightsthe May 31, 2026 filing rolled forward on price — an estimate (as of market close, May 31, 2026)
| # | Issuer | Weight |
|---|---|---|
| 601 | City of Celina | 0.01% |
| 602 | Temple University-of The Commonwealth System of Higher Education | 0.01% |
| 603 | City of Palm Coast | 0.01% |
| 604 | Alvord Unified School District | 0.01% |
| 605 | Missouri State Board of Public Buildings | 0.01% |
| 606 | Louisiana Public Facilities Authority | 0.01% |
| 607 | Oakland Unified School District/Alameda County | 0.01% |
| 608 | City of Hayward | 0.01% |
| 609 | Ohlone Community College District | 0.01% |
| 610 | El Dorado Irrigation District | 0.01% |
| 611 | Massachusetts Bay Transportation Authority Assessment | 0.01% |
| 612 | Onondaga County Trust for Cultural Resources | 0.01% |
| 613 | Elgin Independent School District | 0.01% |
| 614 | East Montgomery County Improvement District Sales Tax | 0.01% |
| 615 | Longview Independent School District | 0.01% |
| 616 | North Carolina State University at Raleigh | 0.01% |
| 617 | Mabank Independent School District | 0.01% |
| 618 | Miami-Dade County Expressway Authority | 0.01% |
| 619 | Scott County School District Finance Corp. | 0.01% |
| 620 | Omaha Public Power District Nebraska City Station Unit 2 | 0.01% |
| 621 | New Haven Unified School District | 0.01% |
| 622 | Borough of North Slope | 0.01% |
| 623 | Weatherford College of the Parker County Junior College District | 0.01% |
| 624 | Washington & Clackamas Counties School District No. 23J Tigard-Tualatin | 0.01% |
| 625 | Pflugerville Independent School District | 0.01% |
| 626 | Oklahoma Industries Authority | 0.01% |
| 627 | SCAGO Educational Facilities Corp. for Pickens School District | 0.01% |
| 628 | Santa Ana Unified School District | 0.01% |
| 629 | Virginia Port Authority | 0.01% |
| 630 | City of Atlanta Airport Customer Facility Charge | 0.01% |
| 631 | Trinity River Authority Central Regional Wastewater System Revenue | 0.01% |
| 632 | Manatee County School District | 0.01% |
| 633 | Multnomah County School District No. 40 | 0.01% |
| 634 | Maine Turnpike Authority | 0.01% |
| 635 | Pecos Barstow Toyah Independent School District | 0.01% |
| 636 | Mount Diablo Unified School District | 0.01% |
| 637 | City of Garland Electric Utility System | 0.01% |
| 638 | Columbus Regional Airport Authority | 0.01% |
| 639 | King & Snohomish Counties School District No. 417 Northshore | 0.01% |
| 640 | City of Westminster Water & Wastewater Utility | 0.01% |
| 641 | Olentangy Local School District | 0.01% |
| 642 | State of Michigan | 0.01% |
| 643 | City of Fort Lauderdale | 0.01% |
| 644 | Suffolk County Water Authority | 0.01% |
| 645 | City of Memphis Electric System | 0.01% |
| 646 | MTA Hudson Rail Yards Trust Obligations | 0.01% |
| 647 | Spokane County School District No. 81 Spokane | 0.01% |
| 648 | San Ysidro School District | 0.01% |
| 649 | San Mateo Foster City Public Financing Authority | 0.01% |
| 650 | San Jacinto Community College District | 0.01% |
| 651 | City of Austin Electric Utility Revenue | 0.01% |
| 652 | Great Lakes Water Authority Sewage Disposal Sys | 0.01% |
| 653 | William S Hart Union High School District | 0.01% |
| 654 | Mesquite Independent School District | 0.01% |
| 655 | Greenwood Independent School District | 0.01% |
| 656 | Metropolitan Utilities District of Omaha Water System Revenue | 0.01% |
| 657 | Austin Community College District | 0.01% |
| 658 | Chicago Board of Education Dedicated Capital Improvement Tax | 0.01% |
| 659 | Kentucky Turnpike Authority | 0.01% |
| 660 | County of Loudoun | 0.01% |
| 661 | Allen Independent School District | 0.01% |
| 662 | County of Miami-Dade Seaport Department | 0.01% |
| 663 | Acalanes Union High School District | 0.01% |
| 664 | Waxahachie Independent School District | 0.01% |
| 665 | State of Arizona | 0.01% |
| 666 | Los Angeles County Facilities, Inc. | 0.01% |
| 667 | Delaware River Port Authority | 0.01% |
| 668 | City of Raleigh NC Combined Enterprise System Revenue | 0.01% |
| 669 | Forsyth County Water & Sewerage Authority | 0.01% |
| 670 | Rowland Unified School District | 0.01% |
| 671 | City of Oakland | 0.01% |
| 672 | City of Colorado Springs | 0.01% |
| 673 | Wisconsin Health & Educational Facilities Authority | 0.01% |
| 674 | Imperial Irrigation District Electric System Revenue | 0.01% |
| 675 | Miami Beach Redevelopment Agency | 0.01% |
| 676 | Park Creek Metropolitan District | 0.01% |
| 677 | County of Hamilton Sewer System | 0.01% |
| 678 | City of Garland | 0.01% |
| 679 | Ysleta Independent School District | 0.01% |
| 680 | County of Hays | 0.01% |
| 681 | Washington Metropolitan Area Transit Authority Dedicated | 0.01% |
| 682 | East Bay Municipal Utility District Wastewater System Revenue | 0.01% |
| 683 | Palomar Community College District | 0.01% |
| 684 | Azle Independent School District | 0.01% |
| 685 | University of Cincinnati | 0.01% |
| 686 | Massachusetts Bay Transportation Authority | 0.01% |
| 687 | Riverside Community College District | 0.01% |
| 688 | City of Lafayette Utilities | 0.01% |
| 689 | Escondido Union High School District | 0.01% |
| 690 | City of Columbia | 0.01% |
| 691 | Greenville County School District | 0.01% |
| 692 | Northern Virginia Transportation Commission | 0.01% |
| 693 | Virginia Resources Authority | 0.01% |
| 694 | College Station Independent School District | 0.01% |
| 695 | Anaheim Public Financing Authority | 0.01% |
| 696 | State Public School Building Authority | 0.01% |
| 697 | Pasadena Area Community College District | 0.01% |
| 698 | Pomona Unified School District | 0.01% |
| 699 | Chaffey Community College District | 0.01% |
| 700 | Portland Community College District | 0.01% |
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.