# IUSB holdings by issuer, coupon and maturity

IUSB holds 18,110 positions from 3,459 issuers in its SEC Form N-PORT for the period ended 2026-07-31, filed 2026-09-25. The largest kinds are US Treasury notes and bonds at 39.5% of net assets, corporate debt at 31.4% and agency mortgage-backed securities at 20.2%. Its debt averages a 4.11% coupon and 11.8 years to maturity, and its filing gives a duration of 5.50 years.

iShares Core Universal USD Bond ETF, fixed income ETF, iShares.

Canonical page: https://tickerinside.com/etf/iusb/
Holdings from IUSB's SEC Form N-PORT for the period ended 2026-07-31, filed 2026-09-25 (https://www.sec.gov/Archives/edgar/data/1100663/000207169126023085/).
Licence: CC BY 4.0, attribution to TickerInside. Measurements, not investment advice.

## What does IUSB hold, from its SEC Form N-PORT for the period ended 2026-07-31?

| Kind of holding | Of net assets |
| --- | --- |
| US Treasury notes and bonds | 39.50% |
| Corporate debt | 31.39% |
| Agency mortgage-backed securities | 20.21% |
| Foreign government debt | 5.90% |
| Money market funds | 5.16% |
| Other mortgage-backed securities | 0.56% |
| Asset-backed securities | 0.29% |
| Municipal bonds | 0.27% |
| US agency and government-sponsored debt | 0.06% |

Average coupon: 4.11%. Average maturity: 11.8 years. Duration: 5.50 years.

## Which issuers does IUSB hold the most of?

The largest issuer is United States Treasury at 39.50% of net assets in 289 lines, then Fannie Mae at 10.11% and Freddie Mac at 5.71%; the ten largest of its 3,459 issuers make up 62.3%.

| Rank | Issuer | Of net assets | Lines |
| --- | --- | --- | --- |
| 1 | United States Treasury | 39.50% | 289 |
| 2 | Fannie Mae | 10.11% | 893 |
| 3 | Freddie Mac | 5.71% | 641 |
| 4 | Ginnie Mae | 4.59% | 309 |
| 5 | JPMorgan Chase & Co | 0.50% | 72 |
| 6 | Bank of America Corp | 0.47% | 60 |
| 7 | Morgan Stanley | 0.43% | 61 |
| 8 | Goldman Sachs Group Inc/The | 0.41% | 50 |
| 9 | Wells Fargo & Co | 0.32% | 41 |
| 10 | Amazon.com Inc | 0.27% | 43 |
| 11 | International Bank for Reconstruction & Development | 0.27% | 29 |
| 12 | Citigroup Inc | 0.26% | 46 |
| 13 | United Mexican States | 0.25% | 39 |
| 14 | Oracle Corp | 0.24% | 52 |
| 15 | Government of Saudi Arabia | 0.23% | 29 |
| 16 | HSBC Holdings PLC | 0.23% | 45 |
| 17 | AT&T Inc | 0.22% | 57 |
| 18 | Verizon Communications Inc | 0.21% | 50 |
| 19 | Government of Turkey | 0.19% | 31 |
| 20 | Meta Platforms Inc | 0.18% | 26 |

## When does IUSB's debt mature?

| Time to maturity | Of net assets |
| --- | --- |
| under 1 year | 0.53% |
| 1 to 3 years | 22.00% |
| 3 to 5 years | 17.95% |
| 5 to 7 years | 10.02% |
| 7 to 10 years | 10.19% |
| 10 to 20 years | 9.48% |
| 20 to 30 years | 24.13% |
| over 30 years | 4.03% |

## Which bond ETFs with a page here share IUSB's issuers?

Ranked by the lower of its issuer and maturity overlaps, AGG shares the most with IUSB: 81.5% of their weight by issuer, in 607 issuers both hold, and 92.3% by time to maturity. The issuer figure counts the 1,000 largest of IUSB's 3,459 issuers, 91.7% of its net assets, and the 1,000 largest of AGG's 1,355 issuers, 98.0% of its net assets.

| ETF | Overlap by issuer | By time to maturity | Issuers in both | Average maturity |
| --- | --- | --- | --- | --- |
| [AGG](https://tickerinside.com/etf/agg/) | 81.5% | 92.3% | 607 | 12.5 years |
| [BND](https://tickerinside.com/etf/bnd/) | 78.9% | 93.9% | 590 | 11.7 years |
| [BSV](https://tickerinside.com/etf/bsv/) | 57.5% | 41.9% | 534 | 2.9 years |
| [GOVT](https://tickerinside.com/etf/govt/) | 39.5% | 79.0% | 1 | 7.4 years |
| [SCHP](https://tickerinside.com/etf/schp/) | 39.5% | 74.4% | 1 | 7.2 years |
| [TIP](https://tickerinside.com/etf/tip/) | 39.5% | 74.2% | 1 | 6.9 years |
| [VTIP](https://tickerinside.com/etf/vtip/) | 39.5% | 40.5% | 1 | 2.4 years |
| [VGIT](https://tickerinside.com/etf/vgit/) | 39.5% | 38.9% | 1 | 5.5 years |
| [TLT](https://tickerinside.com/etf/tlt/) | 39.5% | 25.5% | 1 | 26.0 years |
| [BIV](https://tickerinside.com/etf/biv/) | 59.9% | 24.2% | 526 | 7.5 years |
| [SHY](https://tickerinside.com/etf/shy/) | 39.5% | 22.5% | 1 | 1.9 years |
| [VGSH](https://tickerinside.com/etf/vgsh/) | 39.5% | 22.5% | 1 | 1.9 years |

From each fund's SEC Form N-PORT: AGG, SHY, TLT, VGIT and VGSH for the period ended 2026-05-31, BIV, BND, BSV, SCHP and VTIP 2026-06-30, GOVT, IUSB and TIP 2026-07-31. The issuer figures count the 1,000 largest of IUSB's 3,459 issuers, 91.7% 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.

Every issuer and the largest lines: https://tickerinside.com/api/v1/etf/iusb.json
Method: https://tickerinside.com/how-the-numbers-are-produced/#fixed-income

## Cite this page

TickerInside, iShares Core Universal USD Bond ETF (IUSB), holdings by issuer from SEC Form N-PORT for the period ended 2026-07-31, filed 2026-09-25, https://tickerinside.com/etf/iusb/, CC BY 4.0

    <a href="https://tickerinside.com/etf/iusb/">TickerInside</a> (https://tickerinside.com/etf/iusb/)