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ETF · holdings as filed 2026-04-30

What's inside IUSB?

iShares Core Universal USD Bond ETF
Holdings
17,780
positions in the fund
Top 10
7%
of fund assets
Expense ratio
0.06%
net, per year
Fund size
$37B
total net assets

Top 20 holdings

RankLogoTicker / NameWeight
1
T
TMCXXBLCKRCK LIQ FD TMPCSH-INST
2.82%
2
X
XTSLABLCKRCK CASH-TRSRY-SL AGNCY
0.91%
3
BOND
US Treasury Note4.25% · Nov 2034
0.36%
4
BOND
US Treasury Note4.375% · May 2034
0.36%
5
BOND
US Treasury Note4% · Feb 2030
0.36%
6
BOND
US Treasury Note3.875% · Aug 2034
0.36%
7
BOND
US Treasury Note4.25% · May 2035
0.35%
8
BOND
US Treasury Note4% · Feb 2034
0.35%
9
BOND
US Treasury Note4.625% · Feb 2035
0.35%
10
BOND
US Treasury Note4.5% · Nov 2033
0.34%
11
BOND
US Treasury Note3.625% · Oct 2030
0.34%
12
BOND
US Treasury Note4.25% · Aug 2035
0.33%
13
BOND
US Treasury Note3.625% · Sep 2030
0.33%
14
BOND
US Treasury Note4% · Nov 2035
0.33%
15
BOND
US Treasury Note3.875% · Aug 2033
0.32%
16
BOND
US Treasury Note3.625% · Dec 2030
0.31%
17
BOND
Fannie Mae mortgage pool#FN MA4018
0.31%
18
BOND
US Treasury Note3.75% · Apr 2028
0.31%
19
BOND
US Treasury Note3.75% · May 2028
0.31%
20
BOND
US Treasury Note1.125% · Feb 2031
0.31%
Sectors tap a row to see its top 10 holdings
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
BOND
US Treasury Note4.25% · Nov 2034
0.36%
2
BOND
US Treasury Note4.375% · May 2034
0.36%
3
BOND
US Treasury Note4% · Feb 2030
0.36%
4
BOND
US Treasury Note3.875% · Aug 2034
0.36%
5
BOND
US Treasury Note4.25% · May 2035
0.35%
6
BOND
US Treasury Note4% · Feb 2034
0.35%
7
BOND
US Treasury Note4.625% · Feb 2035
0.35%
8
BOND
US Treasury Note4.5% · Nov 2033
0.34%
9
BOND
US Treasury Note3.625% · Oct 2030
0.34%
10
BOND
US Treasury Note4.25% · Aug 2035
0.33%
Geography tap a row to see its top 10 holdings
Top holdings — United States
Your 10 largest positions in this country
1
T
TMCXXBLCKRCK LIQ FD TMPCSH-INST
2.82%
2
X
XTSLABLCKRCK CASH-TRSRY-SL AGNCY
0.91%
3
BOND
US Treasury Note4.25% · Nov 2034
0.36%
4
BOND
US Treasury Note4.375% · May 2034
0.36%
5
BOND
US Treasury Note4% · Feb 2030
0.36%
6
BOND
US Treasury Note3.875% · Aug 2034
0.36%
7
BOND
US Treasury Note4.25% · May 2035
0.35%
8
BOND
US Treasury Note4% · Feb 2034
0.35%
9
BOND
US Treasury Note4.625% · Feb 2035
0.35%
10
BOND
US Treasury Note4.5% · Nov 2033
0.34%
Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-04-30); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.