# MUB holdings by issuer, coupon and maturity MUB holds 6,654 positions from 776 issuers in its SEC Form N-PORT for the period ended 2026-05-31, filed 2026-07-24. The largest kinds are municipal bonds at 98.2% of net assets and money market funds at 1.3%. Its debt averages a 4.60% coupon and 13.7 years to maturity, and its filing gives a duration of 6.27 years. iShares National Muni Bond ETF, fixed income ETF, iShares. Canonical page: https://tickerinside.com/etf/mub/ Holdings from MUB's SEC Form N-PORT for the period ended 2026-05-31, filed 2026-07-24 (https://www.sec.gov/Archives/edgar/data/1100663/000207169126016725/). Licence: CC BY 4.0, attribution to TickerInside. Measurements, not investment advice. ## What does MUB hold, from its SEC Form N-PORT for the period ended 2026-05-31? | Kind of holding | Of net assets | | --- | --- | | Municipal bonds | 98.25% | | Money market funds | 1.28% | Average coupon: 4.60%. Average maturity: 13.7 years. Duration: 6.27 years. ## Which issuers does MUB hold the most of? The largest issuer is State of California at 4.46% of net assets in 254 lines, then New York City Transitional Finance Authority Future Tax Secured at 4.18% and New York State Dormitory Authority at 3.73%; the ten largest of its 776 issuers make up 26.4%. | Rank | Issuer | Of net assets | Lines | | --- | --- | --- | --- | | 1 | State of California | 4.46% | 254 | | 2 | New York City Transitional Finance Authority Future Tax Secured | 4.18% | 259 | | 3 | New York State Dormitory Authority | 3.73% | 252 | | 4 | City of New York NY | 2.90% | 210 | | 5 | Commonwealth of Massachusetts | 2.16% | 138 | | 6 | New Jersey Transportation Trust Fund Authority | 1.98% | 130 | | 7 | New York City Municipal Water Finance Authority | 1.98% | 96 | | 8 | State of Washington | 1.80% | 95 | | 9 | University of California | 1.64% | 84 | | 10 | Triborough Bridge & Tunnel Authority | 1.56% | 98 | | 11 | Metropolitan Transportation Authority | 1.56% | 100 | | 12 | State of Illinois | 1.48% | 100 | | 13 | Empire State Development Corp | 1.24% | 69 | | 14 | Pennsylvania Turnpike Commission | 1.22% | 76 | | 15 | New York State Thruway Authority | 1.11% | 56 | | 16 | State of Connecticut | 1.09% | 95 | | 17 | Commonwealth of Pennsylvania | 1.07% | 49 | | 18 | Los Angeles Department of Water & Power | 0.97% | 64 | | 19 | Los Angeles Unified School District | 0.92% | 67 | | 20 | Texas Water Development Board | 0.80% | 62 | ## When does MUB's debt mature? | Time to maturity | Of net assets | | --- | --- | | under 1 year | 3.10% | | 1 to 3 years | 6.84% | | 3 to 5 years | 8.12% | | 5 to 7 years | 8.69% | | 7 to 10 years | 12.52% | | 10 to 20 years | 32.33% | | 20 to 30 years | 25.09% | | over 30 years | 1.56% | ## Which bond ETFs with a page here share MUB's issuers? Ranked by the lower of its issuer and maturity overlaps, VTEB shares the most with MUB: 62.9% of their weight by issuer, in 457 issuers both hold, and 94.1% by time to maturity. The issuer figure counts the 1,000 largest of VTEB's 1,143 issuers, 98.8% of its net assets. | ETF | Overlap by issuer | By time to maturity | Issuers in both | Average maturity | | --- | --- | --- | --- | --- | | [VTEB](https://tickerinside.com/etf/vteb/) | 62.9% | 94.1% | 457 | 14.5 years | | [CMF](https://tickerinside.com/etf/cmf/) | 17.0% | 94.7% | 151 | 12.8 years | | [AGG](https://tickerinside.com/etf/agg/) | 0.3% | 70.9% | 30 | 12.5 years | | [BIV](https://tickerinside.com/etf/biv/) | 0.2% | 25.2% | 7 | 7.5 years | | [BND](https://tickerinside.com/etf/bnd/) | 0.2% | 71.7% | 21 | 11.7 years | | [IUSB](https://tickerinside.com/etf/iusb/) | 0.1% | 69.5% | 4 | 11.8 years | | [BIL](https://tickerinside.com/etf/bil/) | 0.0% | 3.1% | 0 | 0.2 years | | [BNDX](https://tickerinside.com/etf/bndx/) | 0.0% | 60.1% | 0 | 8.7 years | | [BSV](https://tickerinside.com/etf/bsv/) | 0.0% | 16.9% | 7 | 2.9 years | | [EBND](https://tickerinside.com/etf/ebnd/) | 0.0% | 63.4% | 0 | 8.8 years | | [EMLC](https://tickerinside.com/etf/emlc/) | 0.0% | 60.1% | 0 | 7.5 years | | [GOVT](https://tickerinside.com/etf/govt/) | 0.0% | 52.9% | 0 | 7.4 years | From each fund's SEC Form N-PORT: AGG, CMF and MUB for the period ended 2026-05-31, BIL, BIV, BND, BSV, EBND and EMLC 2026-06-30, BNDX, GOVT, IUSB and VTEB 2026-07-31. The issuer figures count the 1,000 largest of VTEB's 1,143 issuers, 98.8% of its net assets, and the 1,000 largest of AGG's 1,355 issuers, 98.0% of its net assets, and the 1,000 largest of BND's 1,778 issuers, 97.9% of its net assets, and the 1,000 largest of IUSB's 3,459 issuers, 91.7% of its net assets, and the 1,000 largest of BNDX's 1,354 issuers, 97.4% of its net assets. Every issuer and the largest lines: https://tickerinside.com/api/v1/etf/mub.json Method: https://tickerinside.com/how-the-numbers-are-produced/#fixed-income ## Cite this page TickerInside, iShares National Muni Bond ETF (MUB), holdings by issuer from SEC Form N-PORT for the period ended 2026-05-31, filed 2026-07-24, https://tickerinside.com/etf/mub/, CC BY 4.0 TickerInside (https://tickerinside.com/etf/mub/)