iShares MBS ETF (MBB) Holdings List

$94.52 +0.61 (+0.65%)

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 19.52% 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	6.81%	2,623,055,633
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	0.95%	364,833,000
4	UMBS 30YR TBA(REG A) - 5.5 2026-06-11	N/A	0.94%	360,477,000
5	GNMA2 30YR TBA(REG C) - 5.0 2026-06-22	N/A	0.91%	352,657,000
6	UMBS 30YR TBA(REG A) - 5.0 2026-06-11	N/A	0.90%	353,322,000
7	GNMA2 30YR - 5.0 2054-11-20	N/A	0.55%	215,006,804
8	GNMA2 30YR - 2.0 2051-10-20	N/A	0.54%	255,623,283
9	GNMA2 30YR - 2.0 2051-12-20	N/A	0.53%	251,280,306
10	FNMA 30YR UMBS - 2.0 2051-12-01	N/A	0.52%	251,122,674
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11	FHLMC 30YR UMBS SUPER - 2.0 2051-04-01	N/A	0.50%	240,632,683
12	GNMA2 30YR TBA(REG C) - 4.5 2026-06-22	N/A	0.48%	191,457,000
13	GNMA2 30YR TBA(REG C) - 6.0 2026-06-22	N/A	0.46%	173,486,000
14	GNMA2 30YR - 2.5 2051-07-20	N/A	0.46%	205,920,959
15	FNMA 30YR UMBS - 2.0 2051-11-01	N/A	0.44%	212,857,991
16	FNMA 30YR UMBS SUPER - 2.0 2051-07-01	N/A	0.44%	208,760,764
17	GNMA2 30YR - 5.5 2053-09-20	N/A	0.41%	156,730,932
18	GNMA2 30YR - 2.0 2052-03-20	N/A	0.36%	171,391,872
19	GNMA2 30YR - 2.5 2051-05-20	N/A	0.35%	160,181,297
20	UMBS 30YR TBA(REG A) - 6.0 2026-06-11	N/A	0.34%	127,775,000
21	FNMA 30YR UMBS SUPER - 2.0 2052-04-01	N/A	0.33%	156,816,009
22	FNMA 30YR UMBS - 2.0 2051-03-01	N/A	0.33%	156,611,066
23	FNMA 30YR UMBS - 2.0 2051-10-01	N/A	0.31%	150,426,867
24	GNMA2 30YR - 2.0 2052-01-20	N/A	0.31%	146,609,401
25	GNMA2 30YR - 2.5 2051-08-20	N/A	0.30%	136,862,846

MBB Geographic Exposure

MBB's largest geographic exposure is United States at 98.6%.

United States
98.6%

MBB Currency Exposure

MBB is exclusively exposed to USD.

USD
100.0%

MBB Sector Exposure

MBB's largest sector exposure is Financials at 81.9%.

Financials
81.9%

MBB Industry Exposure

MBB's largest industry exposure is Thrifts & Mortgage Finance at 81.1%, followed by Capital Markets at 0.8%.

Thrifts & Mortgage Finance
81.1%
Capital Markets
0.8%
Diversified Financial Services
0.1%

MBB Sub-Industry Exposure

MBB's largest sub-industry exposure is Thrifts & Mortgage Finance at 81.9%.

Thrifts & Mortgage Finance
81.9%

MBB Coupon Exposure

MBB's largest coupon exposure is 2-4 at 60.2%, followed by 4-6 at 31.9%.

2-4
60.2%
4-6
31.9%
6-8
11.6%

MBB Maturity Exposure

MBB's largest maturity exposure is 20-30 at 79.0%, followed by 10-15 at 6.2%.

20-30
79.0%
10-15
6.2%
0-1
5.9%
15-20
2.9%
30+
2.4%
5-10
2.0%
3-5
0.2%

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This page (NASDAQ:MBB) was last updated on 6/11/2026 by MarketBeat.com Staff.

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iShares MBS ETF (MBB) Holdings List