Fund holdings · iShares Mortgage-Backed Securities Active ETF

MBBA holdings: 695 positions

MBBA held 695 positions as of Oct 13, 2026. Umbs 30YR Tba(reg A) is the largest at 12.57%.

How much of the fund each position is · one bar per position, largest first
Umbs 30YR Tba(reg A) 12.57%695 positionsFnma 30YR Umbs Super 0.24%
12.57%
largest position
37
positions at 1% or more
658
positions under 1%

The largest 100 of 695 positions

100 of 100 · click a column to sort
MBBA’s 695 positions by weight, from the holdings published by its issuer for Oct 13, 2026. A weight is a share of the fund as the issuer states it. The 100 largest are listed; the CSV has all 695. Source: iShares (BlackRock).
#HoldingWeight ↓
1Umbs 30YR Tba(reg A)12.57%
2Umbs 30YR Tba(reg A)6.16%
3Fhlmc 30YR Umbs Super4.97%
4GNMA2 30YR Tba(reg C)4.81%
5Fnma 30YR Umbs4.70%
6Umbs 15YR Tba(reg B)4.23%
7Umbs 30YR Tba(reg A)3.59%
8GNMA2 30YR Tba(reg C)2.99%
9Fnma 30YR Umbs Super2.86%
10Fnma 30YR Umbs2.82%
11GNMA2 30YR Tba(reg C)2.63%
12FHSTR_436 AB2.61%
13Umbs 30YR Tba(reg A)2.40%
14Umbs 30YR Tba(reg A)2.37%
15GNMA2 30YR2.09%
16Fhlmc 30YR Umbs1.93%
17GNMA2 30YR Tba(reg C)1.92%
18GNMA2 30YR Tba(reg C)1.88%
19Fnma 30YR Umbs1.86%
20Fhlmc 30YR Umbs Super1.86%
21Fnma 30YR Umbs1.81%
22Fnma 30YR Umbs Super1.67%
23Fnma 30YR Umbs Super1.61%
24Fhlmc 30YR Umbs Super1.60%
25GNMA_22-208D Pa1.48%
26GNMA2 30YR Tba1.43%
27Fnma 30YR Umbs Super1.41%
28GNMA_26-28A Pf1.41%
29FHSTR_432 Ga1.38%
30GNMA2 30YR Tba(reg C)1.38%
31Fhlmc 30YR Umbs Super1.28%
32GNMA2 30YR Tba(reg C)1.25%
33Fnma 30YR Umbs1.17%
34Umbs 15YR Tba(reg B)1.12%
35Fnma 30YR Umbs Super1.10%
36Fnma 30YR Umbs Super1.03%
37Fhlmc 30YR Umbs1.02%
38Fnma 30YR Umbs Super0.98%
39Fhlmc 30YR Umbs0.92%
40Umbs 15YR Tba(reg B)0.88%
41Fhlmc 30YR Umbs Super0.86%
42GNMA2 30YR0.84%
43GNMA2 30YR Tba(reg C)0.82%
44Fnma 30YR Umbs Super0.79%
45BBCMS_26-5C43 A30.78%
46FNMA_24-70D Fd0.77%
47Fhlmc 30YR Umbs0.74%
48FHSTR_454 Da0.73%
49GNMA2 30YR0.73%
50Fnma 30YR Umbs0.72%
51Fnma 30YR Umbs Super0.66%
52Fhlmc 30YR Umbs Super0.66%
53GNMA_21-76B Ji0.64%
54GNMA_21-67E Qi0.62%
55GNMA2 30YR Tba(reg C)0.62%
56Umbs 30YR Tba(reg A)0.61%
57Fnma 30YR Umbs Super0.59%
58GNMA2 30YR0.54%
59Fnma 30YR Umbs0.54%
60Fhlmc 30YR Umbs Super0.53%
61OBX_21-NQM4 A1 144A0.51%
62Fnma 30YR Umbs Super0.50%
63GNMA2 30YR0.50%
64Fnma 30YR Umbs Super0.48%
65EFMT_22-1 A1 144A0.44%
66Fhlmc 30YR Umbs0.43%
67Umbs 15YR Tba(reg B)0.43%
68MSRM_26-NQM11 A1 144A0.42%
69FHLMC_5711 Fg0.41%
70Fhlmc 30YR Umbs Super0.40%
71COLT_26-8 A1 144A0.39%
72Fnma 30YR Umbs0.39%
73GNMA_15-55 A0.39%
74Fnma 30YR Umbs0.37%
75GNMA2 30YR0.37%
76Fnma 30YR Umbs Super0.37%
77JPMCC_26-ARLO A 144A0.37%
78EQUS_26-PHNX A0.36%
79MAC_25-801B A 144A0.35%
80SWCH_25-DATA A 144A0.34%
81GNMA2 30YR0.34%
82Fhlmc 30YR Umbs0.32%
83Fnma 30YR Umbs0.32%
84Fhlmc 30YR Umbs0.32%
85BX_25-VOLT A 144A0.31%
86GNMA2 30YR0.30%
87Fnma 30YR Umbs Super0.30%
88Gnma 30YR Platinum0.30%
89GNMA_21-23C Ia0.29%
90GNMA_20-149H Ia0.29%
91Fnma 30YR Umbs Super0.28%
92Fhlmc 30YR Umbs Super0.28%
93Fnma 30YR Umbs Super0.27%
94Fnma 30YR Umbs0.27%
95Fhlmc 30YR Umbs Super0.27%
96Fnma 30YR Umbs0.27%
97GNMA_26-144C Sd0.27%
98Fnma 30YR Umbs0.27%
99GNMA_24-23 SA0.25%
100Fnma 30YR Umbs Super0.24%
BLK Csh Fnd Treasury Sl Agency12.98%
Cash Collateral Usd Ubfut0.36%
Cash Collateral Usd Jpm0.05%
Cash Collateral Usd Xms0.02%
Cash Collateral Usd Hrnb−0.04%
USD Cash−50.94%
Cash and other net assets0.12%
As of Oct 13, 2026. Source: iShares (BlackRock). The CSV lists all 695.

The book

Positions695
Listed on this page100 largest
Holdings published for (the issuer’s daily file)Oct 13, 2026
Cash and other net assets−37.45%

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 MBBA, data as of Oct 13, 2026. https://etfiq.com/funds/mbba/holdings/

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