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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
T
T 4.25 11.15.34US TREASURY N/B
0.36%
4
T
T 4.375 05.15.34US TREASURY N/B
0.36%
5
T
T 4 02.28.30US TREASURY N/B
0.36%
6
T
T 3.875 08.15.34US TREASURY N/B
0.36%
7
T
T 4.25 05.15.35US TREASURY N/B
0.35%
8
T
T 4 02.15.34US TREASURY N/B
0.35%
9
T
T 4.625 02.15.35US TREASURY N/B
0.35%
10
T
T 4.5 11.15.33US TREASURY N/B
0.34%
11
T
T 3.625 10.31.30US TREASURY N/B
0.34%
12
T
T 4.25 08.15.35US TREASURY N/B
0.33%
13
T
T 3.625 09.30.30US TREASURY N/B
0.33%
14
T
T 4 11.15.35US TREASURY N/B
0.33%
15
T
T 3.875 08.15.33US TREASURY N/B
0.32%
16
T
T 3.625 12.31.30US TREASURY N/B
0.31%
17
F
FN MA4018FN MA4018
0.31%
18
T
T 3.75 04.15.28US TREASURY N/B
0.31%
19
T
T 3.75 05.15.28US TREASURY N/B
0.31%
20
T
T 1.125 02.15.31US TREASURY N/B
0.31%
Sectors
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
T
T 4.25 11.15.34US TREASURY N/B
0.36%
2
T
T 4.375 05.15.34US TREASURY N/B
0.36%
3
T
T 4 02.28.30US TREASURY N/B
0.36%
4
T
T 3.875 08.15.34US TREASURY N/B
0.36%
5
T
T 4.25 05.15.35US TREASURY N/B
0.35%
6
T
T 4 02.15.34US TREASURY N/B
0.35%
7
T
T 4.625 02.15.35US TREASURY N/B
0.35%
8
T
T 4.5 11.15.33US TREASURY N/B
0.34%
9
T
T 3.625 10.31.30US TREASURY N/B
0.34%
10
T
T 4.25 08.15.35US TREASURY N/B
0.33%
Geography
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
T
T 4.25 11.15.34US TREASURY N/B
0.36%
4
T
T 4.375 05.15.34US TREASURY N/B
0.36%
5
T
T 4 02.28.30US TREASURY N/B
0.36%
6
T
T 3.875 08.15.34US TREASURY N/B
0.36%
7
T
T 4.25 05.15.35US TREASURY N/B
0.35%
8
T
T 4 02.15.34US TREASURY N/B
0.35%
9
T
T 4.625 02.15.35US TREASURY N/B
0.35%
10
T
T 4.5 11.15.33US TREASURY N/B
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.