Fund holdings · iShares Core Universal USD Bond ETF

IUSB holdings: 18,255 positions

IUSB held 18,255 positions as of Oct 13, 2026. BLK Liquidity Temp Cash Inst #21 is the largest at 4.82%; the top 10 are 8.3% of the fund.

How much of the fund each position is · one bar per position, largest first
BLK Liquidity Temp Cash Inst #21 4.82%18,255 positionsTreasury Note 0.17%
8.3%
top 10 together
4.82%
largest position
18,254
positions under 1%

The largest 100 of 18,255 positions

100 of 100 · click a column to sort
IUSB’s 18,255 positions by weight, from the holdings published by its issuer for Oct 13, 2026. A weight is a share of net assets. The 100 largest are listed; the CSV has all 18,255. Source: iShares (BlackRock).
#HoldingWeight ↓
1BLK Liquidity Temp Cash Inst #214.82%
2Treasury Note0.50%
3Treasury Note0.42%
4Treasury Note0.41%
5Treasury Note0.39%
6Treasury Note0.38%
7Treasury Note (2OLD)0.36%
8Umbs 15YR Tba(reg B)0.36%
9Umbs 30YR Tba(reg A)0.34%
10Treasury Note (old)0.34%
11Treasury Note0.33%
12Treasury Note0.33%
13Treasury Note0.33%
14Treasury Note (old)0.33%
15Treasury Note0.33%
16Treasury Note0.33%
17Treasury Note0.33%
18Treasury Note0.32%
19Treasury Note0.32%
20Treasury Note0.32%
21Treasury Note0.32%
22Umbs 30YR Tba(reg A)0.31%
23Treasury Note0.31%
24Treasury Note0.31%
25Treasury Note0.30%
26Treasury Note0.28%
27Treasury Note0.28%
28Treasury Note0.28%
29Umbs 30YR Tba(reg A)0.28%
30Treasury Note0.28%
31Treasury Note0.27%
32Treasury Note (2OLD)0.27%
33Treasury Note0.27%
34Treasury Note0.27%
35Treasury Note0.26%
36Treasury Note0.26%
37Treasury Note0.26%
38Treasury Note0.26%
39Treasury Note0.25%
40Treasury Note0.25%
41Treasury Note0.25%
42Treasury Note0.25%
43Treasury Note (old)0.24%
44Treasury Note0.24%
45Treasury Note0.24%
46Treasury Note0.24%
47Treasury Note0.23%
48Treasury Note0.23%
49Treasury Note0.23%
50Treasury Note0.23%
51Treasury Note0.23%
52Umbs 30YR Tba(reg A)0.23%
53Treasury Note0.23%
54Treasury Note (otr)0.23%
55Treasury Note0.22%
56Treasury Note0.22%
57Treasury Note0.22%
58Fnma 30YR Umbs Super0.22%
59Treasury Note0.22%
60Umbs 30YR Tba(reg A)0.21%
61Treasury Note0.21%
62Treasury Note0.21%
63Fnma 30YR Umbs0.21%
64Treasury Note0.21%
65Treasury Note0.21%
66Treasury Note0.21%
67Umbs 15YR Tba(reg B)0.21%
68Treasury Note0.21%
69Treasury Note0.21%
70Treasury Note0.21%
71Treasury Bond0.20%
72GNMA2 30YR Tba(reg C)0.20%
73Treasury Note0.20%
74Treasury Note0.20%
75Treasury Note0.20%
76Treasury Note0.20%
77Treasury Note0.20%
78Treasury Note0.20%
79Treasury Note (2OLD)0.20%
80Treasury Bond0.20%
81Umbs 30YR Tba(reg A)0.20%
82GNMA2 30YR Tba(reg C)0.19%
83Treasury Note0.19%
84Treasury Note0.19%
85Treasury Note0.19%
86Treasury Note0.19%
87Treasury Note0.19%
88Treasury Note0.18%
89Treasury Note0.18%
90Treasury Bond0.18%
91Treasury Bond (2OLD)0.18%
92Treasury Bond0.18%
93Treasury Note0.18%
94GNMA2 30YR Tba(reg C)0.18%
95Treasury Note0.18%
96Treasury Bond0.18%
97Treasury Note0.17%
98Treasury Note0.17%
99Treasury Note0.17%
100Treasury Note0.17%
BLK Csh Fnd Treasury Sl Agency0.00%
EUR Cash0.00%
USD Cash−4.10%
Cash and other net assets−0.53%
As of Oct 13, 2026. Source: iShares (BlackRock). The CSV lists all 18,255.

The book

Positions18,255
Listed on this page100 largest
Holdings published for (the issuer’s daily file)Oct 13, 2026
Top 10 together8.3%
Cash and other net assets−4.63%

What this list is

How the list is built

Each weight is the share of net assets the issuer’s own daily file gives, largest first. Cash and other net assets are in their own row and are not a position. A negative weight is a short or an offsetting contract. Where a source leaves out a ticker, ETFIQ fills it from the same security in another fund’s book; names are set in title case where the source used capitals. How books are read.

Weights are as the source states them, largest first.

Where these figures came from

ETFIQ links to the documents behind every figure; a link is not an endorsement. ETFIQ is an independent publisher and makes no recommendations; every figure is calculated from published data. Standards and sources →

Cite this pageCitation, APA and Markdown

ETFIQ, Holdings of IUSB, data as of Oct 13, 2026. https://etfiq.com/funds/iusb/holdings/

Open data →

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data.