iShares MBS ETF (MBB) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for MBB. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 1,019 institutions reported holding MBB, with 371.1 million shares worth $35.1 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| Bank of America | 68,261,267 | $6.5B | INCREASED |
| JPMorgan Chase | 37,776,202 | $3.6B | INCREASED |
| Envestnet Asset Management | 30,910,875 | $2.9B | INCREASED |
| Lpl Financial | 27,128,190 | $2.6B | DECREASED |
| UBS Group | 22,775,784 | $2.2B | DECREASED |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|---|---|---|
| John Boozman (Republican) | PURCHASE | $1,001 - $15,000 | 2026-09-09 |
Full institutional holdings, insider history, and congressional trades for iShares MBS ETF on SentiSense.