iShares MBS ETF (MBB) Holdings List

$93.40 -0.09 (-0.10%)

As of 10:03 AM Eastern

What stocks does MBB hold?

The iShares MBS ETF (MBB) top stock holdings include BLACKROCK CASH CL INST SL AGENCY, FHLMC 30YR UMBS SUPER - 2.0 2051-05-01, and GNMA2 30YR TBA(REG C) - 5.5 2026-08-20. The top 25 MBB holdings ordered by weight make up 19.44% 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	7.91%	3,091,276,408
2	FHLMC 30YR UMBS SUPER - 2.0 2051-05-01	N/A	1.00%	494,766,371
3	GNMA2 30YR TBA(REG C) - 5.5 2026-08-20	N/A	0.98%	382,883,000
4	UMBS 30YR TBA(REG A) - 5.0 2026-08-13	N/A	0.66%	264,272,000
5	GNMA2 30YR TBA(REG C) - 5.0 2026-08-20	N/A	0.58%	233,057,000
6	UMBS 30YR TBA(REG A) - 5.5 2026-08-13	N/A	0.56%	220,702,000
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 2026-08-20	N/A	0.46%	191,457,000
13	GNMA2 30YR TBA(REG C) - 6.0 2026-08-20	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 2026-08-18	N/A	0.36%	148,200,000
19	GNMA2 30YR - 2.0 2052-03-20	N/A	0.35%	168,596,513
20	GNMA2 30YR - 2.5 2051-05-20	N/A	0.34%	157,479,147
21	UMBS 30YR TBA(REG A) - 6.0 2026-08-13	N/A	0.33%	125,778,000
22	GNMA2 30YR - 5.0 2056-04-20	N/A	0.32%	128,127,525
23	FNMA 30YR UMBS SUPER - 2.0 2052-04-01	N/A	0.31%	154,829,813
24	FNMA 30YR UMBS - 2.0 2051-03-01	N/A	0.31%	154,472,274
25	UMBS 15YR TBA(REG B) - 2.0 2026-08-18	N/A	0.30%	130,345,791

MBB Geographic Exposure

MBB's largest geographic exposure is United States at 99.3%.

United States
99.3%

MBB Currency Exposure

MBB is exclusively exposed to USD.

USD
100.0%

MBB Sector Exposure

MBB's largest sector exposure is Financials at 81.2%.

Financials
81.2%

MBB Industry Exposure

MBB's largest industry exposure is Thrifts & Mortgage Finance at 81.1%, followed by Diversified Financial Services at 0.1%.

Thrifts & Mortgage Finance
81.1%
Diversified Financial Services
0.1%

MBB Sub-Industry Exposure

MBB's largest sub-industry exposure is Thrifts & Mortgage Finance at 81.2%.

Thrifts & Mortgage Finance
81.2%

MBB Coupon Exposure

MBB's largest coupon exposure is 2-4 at 60.3%, followed by 4-6 at 33.2%.

2-4
60.3%
4-6
33.2%
6-8
11.2%

MBB Maturity Exposure

MBB's largest maturity exposure is 20-30 at 77.1%, followed by 0-1 at 6.3%.

20-30
77.1%
0-1
6.3%
10-15
6.0%
30+
4.2%
15-20
2.8%
5-10
1.9%
3-5
0.2%

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This page (NASDAQ:MBB) was last updated on 8/14/2026 by MarketBeat.com Staff.

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iShares MBS ETF (MBB) Holdings List