# MBB holdings: 10,855 positions

> MBB holdings as of Oct 13, 2026: Blackrock Cash Cl Inst Sl Agency 4.68%, Fhlmc 30YR Umbs Super 1.03% and GNMA2 30YR Tba(reg C) 0.68% and 10,852 more.

Data as of Oct 13, 2026. Rebuilt every trading night.

MBB held 10,855 positions as of Oct 13, 2026. Blackrock Cash Cl Inst Sl Agency is the largest at 4.68%; the top 10 are 10.2% of the fund.

Source: iShares (BlackRock) (https://www.ishares.com/us/products/239465/x/latest-holdings.csv).

| # | Holding | Ticker | Weight |
| --- | --- | --- | --- |
| 1 | Blackrock Cash Cl Inst Sl Agency |  | 4.68% |
| 2 | Fhlmc 30YR Umbs Super |  | 1.03% |
| 3 | GNMA2 30YR Tba(reg C) |  | 0.68% |
| 4 | Umbs 30YR Tba(reg A) |  | 0.59% |
| 5 | GNMA2 30YR |  | 0.58% |
| 6 | GNMA2 30YR Tba(reg C) |  | 0.57% |
| 7 | GNMA2 30YR |  | 0.53% |
| 8 | GNMA2 30YR |  | 0.52% |
| 9 | Fnma 30YR Umbs |  | 0.52% |
| 10 | GNMA2 30YR |  | 0.51% |
| 11 | Fhlmc 30YR Umbs Super |  | 0.50% |
| 12 | Fnma 30YR Umbs |  | 0.44% |
| 13 | GNMA2 30YR |  | 0.43% |
| 14 | GNMA2 30YR |  | 0.40% |
| 15 | GNMA2 30YR |  | 0.39% |
| 16 | GNMA2 30YR |  | 0.35% |
| 17 | Umbs 30YR Tba(reg A) |  | 0.35% |
| 18 | Fnma 30YR Umbs Super |  | 0.32% |
| 19 | Fnma 30YR Umbs |  | 0.32% |
| 20 | GNMA2 30YR |  | 0.32% |
| 21 | GNMA2 30YR |  | 0.31% |
| 22 | Fnma 30YR Umbs |  | 0.31% |
| 23 | GNMA2 30YR |  | 0.30% |
| 24 | Fnma 30YR Umbs |  | 0.29% |
| 25 | Fnma 30YR Umbs |  | 0.27% |
| | BLK Csh Fnd Treasury Sl Agency | | 0.00% |
| | Cash Collateral Usd Barc | | 0.00% |
| | USD Cash | | −3.28% |
| | Cash and other net assets | | 4.44% |

The largest 25 of 10,855 positions are shown. All of them: https://etfiq.com/funds/mbb/holdings/mbb-holdings.csv (CSV) or https://etfiq.com/data/books/mbb.json (JSON).

Fund page: https://etfiq.com/funds/mbb

Cite: ETFIQ, Holdings of MBB, data as of Oct 13, 2026. https://etfiq.com/funds/mbb/holdings/