iShares MBS ETF (MBB)

MBB Holdings List

As of Aug 14, 2025

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No.	Symbol	Name	% Weight	Shares
1	n/a	BLACKROCK CASH CL INST SL AGENCY	3.96%	1,593,921,078
2	n/a	FHLMC 30YR UMBS SUPER - 2.0 2051-05-01	1.02%	516,484,496
3	n/a	GNMA2 30YR TBA(REG C) - 6.0 2025-09-22	0.59%	231,750,000
4	n/a	GNMA2 30YR - 2.0 2051-10-20	0.55%	272,952,298
5	n/a	GNMA2 30YR - 2.0 2051-12-20	0.54%	268,065,971
6	n/a	FNMA 30YR UMBS - 2.0 2051-12-01	0.52%	263,645,004
7	n/a	FHLMC 30YR UMBS SUPER - 2.0 2051-04-01	0.50%	253,156,437
8	n/a	GNMA2 30YR - 2.5 2051-07-20	0.46%	220,284,215
9	n/a	FNMA 30YR UMBS - 2.0 2051-11-01	0.44%	223,540,913
10	n/a	FNMA 30YR UMBS SUPER - 2.0 2051-07-01	0.44%	221,002,144
11	n/a	GNMA2 30YR TBA(REG C) - 6.5 2025-09-22	0.42%	163,868,493
12	n/a	GNMA2 30YR - 5.0 2054-11-20	0.40%	163,215,510
13	n/a	UMBS 30YR TBA(REG A) - 6.5 2025-09-15	0.38%	148,925,000
14	n/a	GNMA2 30YR - 2.0 2052-03-20	0.37%	182,716,693
15	n/a	FNMA 30YR UMBS - 3.0 2051-10-01	0.37%	170,421,560
16	n/a	GNMA2 30YR - 2.5 2051-05-20	0.36%	171,222,269
17	n/a	GNMA2 30YR - 5.5 2053-09-20	0.36%	143,484,487
18	n/a	GNMA2 30YR TBA(REG C) - 5.0 2025-09-22	0.35%	143,587,000
19	n/a	GNMA2 30YR - 2.5 2052-04-20	0.34%	163,265,240
20	n/a	FHLMC 30YR UMBS SUPER - 2.0 2052-03-01	0.34%	173,139,746
21	n/a	FNMA 30YR UMBS - 2.0 2051-03-01	0.33%	164,791,138
22	n/a	FNMA 30YR UMBS SUPER - 2.0 2052-04-01	0.33%	164,758,410
23	n/a	GNMA2 30YR TBA(REG C) - 5.5 2025-09-22	0.32%	129,433,000
24	n/a	GNMA2 30YR - 6.5 2054-07-20	0.32%	123,260,040
25	n/a	GNMA2 30YR - 2.0 2052-01-20	0.31%	154,755,518

As of Aug 14, 2025

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