MBB · iShares MBS ETF ETF
iShares Trust
$92.72
+0.06%
At close · Sep 4
Net assets $38,738,470,076
Holdings11,146
1 month
-0.60%
Year to date
-0.19%
52-week range
$92.28–$96.97
30-session avg volume
2,446,153
Market performance
Adjusted close · up to five years
Fund profile
- Structure
- Open-end / ETF
- SEC series
- S000013702
- Report date
- May 31, 2026
- Holdings coverage
- Full reported portfolio
Portfolio concentration
Top 10 holdings13.06%
Calculated only when the SEC filing is stored with complete portfolio coverage.
Asset allocation
ABS-MBS98.10%
STIV6.77%
Country allocation
US104.88%
Portfolio holdings
Latest linked SEC Form NPORT-P report.
| Holding | Ticker / CUSIP | Value | Weight |
|---|---|---|---|
| BLACKROCK CASH FUNDS | 066922477 | $2,623,480,473 | 6.77% |
| Freddie Mac | 3132DWBP7 | $405,590,680 | 1.05% |
| Government National Mortgage Association | 21H052660 | $367,083,031 | 0.95% |
| UMBS, TBA | 01F052664 | $322,192,743 | 0.83% |
| Government National Mortgage Association | 21H050664 | $260,191,705 | 0.67% |
| UMBS, TBA | 01F050668 | $249,203,172 | 0.64% |
| Government National Mortgage Association | 3618N5A33 | $212,989,182 | 0.55% |
| Government National Mortgage Association | 36179WP93 | $209,879,147 | 0.54% |
| Government National Mortgage Association | 36179WTX6 | $206,313,352 | 0.53% |
| Fannie Mae | 31418D7E6 | $202,251,723 | 0.52% |
| Freddie Mac | 3132DWBH5 | $194,474,863 | 0.50% |
| Government National Mortgage Association | 21H060663 | $176,749,242 | 0.46% |
| Government National Mortgage Association | 36179WJR0 | $176,233,001 | 0.45% |
| Fannie Mae | 31418D6B3 | $171,507,993 | 0.44% |
| Fannie Mae | 3140XLE46 | $169,225,014 | 0.44% |
| Government National Mortgage Association | 36179YFL3 | $158,905,016 | 0.41% |
| Government National Mortgage Association | 36179WY85 | $140,737,168 | 0.36% |
| Government National Mortgage Association | 36179WFG8 | $137,199,152 | 0.35% |
| UMBS, TBA | 01F060667 | $130,467,241 | 0.34% |
| Fannie Mae | 3140XREC5 | $126,681,069 | 0.33% |
| Fannie Mae | 31418DXK3 | $126,624,797 | 0.33% |
| Fannie Mae | 31418D4X7 | $121,257,285 | 0.31% |
| Government National Mortgage Association | 36179WVT2 | $120,373,492 | 0.31% |
| Government National Mortgage Association | 36179WLP1 | $117,131,109 | 0.30% |
| Fannie Mae | 31418DYB2 | $114,623,694 | 0.30% |
| Government National Mortgage Association | 36179Y2N3 | $110,364,944 | 0.28% |
| Government National Mortgage Association | 36179WY93 | $109,371,292 | 0.28% |
| Fannie Mae | 3140QHBC8 | $109,250,547 | 0.28% |
| Government National Mortgage Association | 36179VZQ6 | $108,273,580 | 0.28% |
| Government National Mortgage Association | 36179WTY4 | $106,509,668 | 0.27% |
| UMBS, TBA | 01F020463 | $99,435,329 | 0.26% |
| Freddie Mac | 3132DWG98 | $94,736,212 | 0.24% |
| Freddie Mac | 3132DWCT8 | $92,168,400 | 0.24% |
| Fannie Mae | 3140XNL36 | $88,105,141 | 0.23% |
| Government National Mortgage Association | 21H042661 | $87,968,337 | 0.23% |
| Government National Mortgage Association | 36179W2U1 | $87,791,805 | 0.23% |
| Government National Mortgage Association | 36179WNE4 | $86,621,678 | 0.22% |
| Freddie Mac | 3132DWBB8 | $86,226,210 | 0.22% |
| Freddie Mac | 3132DWJF1 | $84,233,636 | 0.22% |
| Fannie Mae | 3140XHHS9 | $83,398,777 | 0.22% |
| Freddie Mac | 3133KLYA9 | $83,239,640 | 0.21% |
| Fannie Mae | 3140QHKW4 | $80,812,757 | 0.21% |
| Fannie Mae | 3140QVG32 | $80,366,032 | 0.21% |
| Fannie Mae | 3140XRPU3 | $76,661,793 | 0.20% |
| Government National Mortgage Association | 3618N5C56 | $76,021,878 | 0.20% |
| Freddie Mac | 31427MT27 | $75,679,377 | 0.20% |
| Freddie Mac | 3132DWEF6 | $73,844,405 | 0.19% |
| Government National Mortgage Association | 36179Y5M2 | $73,825,452 | 0.19% |
| Fannie Mae | 3140MCAF7 | $72,949,125 | 0.19% |
| Government National Mortgage Association | 36179W5B0 | $70,812,549 | 0.18% |