1 institutions reported holding $20.7M of iShares US Mortgage Backed Securities UCITS ETF (Acc) (IMBXF) in SEC 13F filings for 2026-03-31. Largest institutional holders: Sierra Capital LLC ($20.7M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Sierra Capital LLC | $20.7M | 3.7M | Added |
Source: SEC Form 13F filings · as of 2026-03-31