iShares MBS ETF (MBB) Holdings List

$93.41 -0.16 (-0.17%)

As of 04:00 PM Eastern

What stocks does MBB hold?

The iShares MBS ETF (MBB) top stock holdings include BLACKROCK CASH CL INST SL AGENCY, GNMA2 30YR TBA(REG C) - 5.0 2026-07-20, and FHLMC 30YR UMBS SUPER - 2.0 2051-05-01. The top 25 MBB holdings ordered by weight make up 19.38% of the total fund. MBB is a fixed income fund in the u.s. government category that invests in investments, focused on agency mbs strategies within the North America region. This page includes a complete MBB stock holdings list ranked by weight, along with a full breakdown of sector, geographic, industry, and currency exposure.

Top 25 MBB Holdings

Rank	Company	Current Price	Weight	Shares Held
1	BLACKROCK CASH CL INST SL AGENCY	N/A	6.74%	2,649,893,194
2	GNMA2 30YR TBA(REG C) - 5.0 2026-07-20	N/A	1.01%	401,707,000
3	FHLMC 30YR UMBS SUPER - 2.0 2051-05-01	N/A	1.01%	494,766,371
4	GNMA2 30YR TBA(REG C) - 5.5 2026-07-20	N/A	0.98%	382,883,000
5	UMBS 30YR TBA(REG A) - 5.5 2026-08-13	N/A	0.98%	384,252,000
6	UMBS 30YR TBA(REG A) - 5.0 2026-08-13	N/A	0.89%	355,747,000
7	GNMA2 30YR - 5.0 2054-11-20	N/A	0.53%	210,877,095
8	GNMA2 30YR - 2.0 2051-10-20	N/A	0.52%	251,660,138
9	GNMA2 30YR - 2.0 2051-12-20	N/A	0.51%	247,209,936
10	FNMA 30YR UMBS - 2.0 2051-12-01	N/A	0.50%	247,771,308
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11	FHLMC 30YR UMBS SUPER - 2.0 2051-04-01	N/A	0.48%	237,331,740
12	GNMA2 30YR TBA(REG C) - 4.5 2026-07-20	N/A	0.47%	191,457,000
13	GNMA2 30YR TBA(REG C) - 6.0 2026-07-20	N/A	0.45%	173,486,000
14	GNMA2 30YR - 2.5 2051-07-20	N/A	0.44%	202,358,243
15	FNMA 30YR UMBS - 2.0 2051-11-01	N/A	0.43%	210,026,924
16	FNMA 30YR UMBS SUPER - 2.0 2051-07-01	N/A	0.42%	205,364,146
17	GNMA2 30YR - 5.5 2053-09-20	N/A	0.39%	151,816,091
18	UMBS 15YR TBA(REG B) - 4.0 2026-07-16	N/A	0.36%	148,200,000
19	UMBS 30YR TBA(REG A) - 6.0 2026-08-13	N/A	0.36%	137,728,000
20	GNMA2 30YR - 2.0 2052-03-20	N/A	0.35%	168,596,513
21	GNMA2 30YR - 2.5 2051-05-20	N/A	0.34%	157,479,147
22	FNMA 30YR UMBS SUPER - 2.0 2052-04-01	N/A	0.31%	154,829,813
23	FNMA 30YR UMBS - 2.0 2051-03-01	N/A	0.31%	154,472,274
24	FNMA 30YR UMBS - 2.0 2051-10-01	N/A	0.30%	148,352,933
25	UMBS 15YR TBA(REG B) - 2.0 2026-07-16	N/A	0.30%	130,345,791

MBB Geographic Exposure

MBB's largest geographic exposure is United States at 98.8%.

United States
98.8%

MBB Currency Exposure

MBB is exclusively exposed to USD.

USD
100.0%

MBB Sector Exposure

MBB's largest sector exposure is Financials at 82.3%.

Financials
82.3%

MBB Industry Exposure

MBB's largest industry exposure is Thrifts & Mortgage Finance at 81.9%, followed by Diversified Financial Services at 0.4%.

Thrifts & Mortgage Finance
81.9%
Diversified Financial Services
0.4%

MBB Sub-Industry Exposure

MBB's largest sub-industry exposure is Thrifts & Mortgage Finance at 82.3%.

Thrifts & Mortgage Finance
82.3%

MBB Coupon Exposure

MBB's largest coupon exposure is 2-4 at 60.4%, followed by 4-6 at 32.5%.

2-4
60.4%
4-6
32.5%
6-8
11.3%

MBB Maturity Exposure

MBB's largest maturity exposure is 20-30 at 78.0%, followed by 0-1 at 6.5%.

20-30
78.0%
0-1
6.5%
10-15
6.1%
30+
3.0%
15-20
2.9%
5-10
1.9%
3-5
0.2%

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This page (NASDAQ:MBB) was last updated on 7/21/2026 by MarketBeat.com Staff.

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iShares MBS ETF (MBB) Holdings List