iShares MBS ETF (MBB) Holdings List

$94.08 +0.18 (+0.19%)

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, FHLMC 30YR UMBS SUPER - 2.0 2051-05-01, and GNMA2 30YR TBA(REG C) - 5.5 2026-06-22. The top 25 MBB holdings ordered by weight make up 17.90% 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	5.65%	2,125,981,740
2	FHLMC 30YR UMBS SUPER - 2.0 2051-05-01	N/A	1.05%	502,072,744
3	GNMA2 30YR TBA(REG C) - 5.5 2026-06-22	N/A	0.99%	374,233,000
4	UMBS 30YR TBA(REG A) - 5.5 2026-06-11	N/A	0.85%	320,777,000
5	UMBS 30YR TBA(REG A) - 5.0 2026-06-11	N/A	0.78%	301,347,000
6	GNMA2 30YR TBA(REG C) - 5.0 2026-06-22	N/A	0.68%	263,507,000
7	GNMA2 30YR - 5.0 2054-11-20	N/A	0.56%	215,006,804
8	GNMA2 30YR - 2.0 2051-10-20	N/A	0.55%	255,623,283
9	GNMA2 30YR - 2.0 2051-12-20	N/A	0.54%	251,280,306
10	FNMA 30YR UMBS - 2.0 2051-12-01	N/A	0.53%	251,122,674
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11	FHLMC 30YR UMBS SUPER - 2.0 2051-04-01	N/A	0.51%	240,632,683
12	GNMA2 30YR TBA(REG C) - 6.0 2026-06-22	N/A	0.47%	173,486,000
13	GNMA2 30YR - 2.5 2051-07-20	N/A	0.46%	205,920,959
14	FNMA 30YR UMBS - 2.0 2051-11-01	N/A	0.45%	212,857,991
15	FNMA 30YR UMBS SUPER - 2.0 2051-07-01	N/A	0.44%	208,760,764
16	GNMA2 30YR - 5.5 2053-09-20	N/A	0.42%	156,730,932
17	GNMA2 30YR - 2.0 2052-03-20	N/A	0.37%	171,391,872
18	GNMA2 30YR - 2.5 2051-05-20	N/A	0.36%	160,181,297
19	UMBS 30YR TBA(REG A) - 6.0 2026-06-11	N/A	0.34%	127,775,000
20	FNMA 30YR UMBS SUPER - 2.0 2052-04-01	N/A	0.33%	156,816,009
21	FNMA 30YR UMBS - 2.0 2051-03-01	N/A	0.33%	156,611,066
22	FNMA 30YR UMBS - 2.0 2051-10-01	N/A	0.32%	150,426,867
23	GNMA2 30YR - 2.0 2052-01-20	N/A	0.31%	145,320,626
24	GNMA2 30YR - 2.5 2051-08-20	N/A	0.31%	136,862,846
25	FNMA 30YR UMBS - 2.0 2051-04-01	N/A	0.30%	141,829,163

MBB Geographic Exposure

MBB's largest geographic exposure is United States at 97.7%.

United States
97.7%

MBB Currency Exposure

MBB is exclusively exposed to USD.

USD
100.0%

MBB Sector Exposure

MBB's largest sector exposure is Financials at 85.4%.

Financials
85.4%

MBB Industry Exposure

MBB's largest industry exposure is Thrifts & Mortgage Finance at 85.2%, followed by Capital Markets at 0.1%.

Thrifts & Mortgage Finance
85.2%
Capital Markets
0.1%
Diversified Financial Services
0.1%

MBB Sub-Industry Exposure

MBB's largest sub-industry exposure is Thrifts & Mortgage Finance at 85.4%.

Thrifts & Mortgage Finance
85.4%

MBB Coupon Exposure

MBB's largest coupon exposure is 2-4 at 60.8%, followed by 4-6 at 30.9%.

2-4
60.8%
4-6
30.9%
6-8
11.2%

MBB Maturity Exposure

MBB's largest maturity exposure is 20-30 at 79.7%, followed by 10-15 at 6.4%.

20-30
79.7%
10-15
6.4%
0-1
5.3%
15-20
3.0%
5-10
2.0%
30+
1.7%
3-5
0.2%

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This page (NASDAQ:MBB) was last updated on 5/22/2026 by MarketBeat.com Staff.

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iShares MBS ETF (MBB) Holdings List