19 institutions reported holding $84.0M of BLACKROCK ETF TRUST (GMMF) in SEC 13F filings for 2026-06-30. Largest institutional holders: MRWM Advisors, LLC ($42.6M), BlackRock, Inc. ($25.1M), Hummer Financial Advisory Services Inc ($3.1M), Cambridge Investment Research Advisors, Inc. ($2.7M), CITADEL ADVISORS LLC ($2.7M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | MRWM Advisors, LLC | $42.6M | 424,326 | New |
| 2 | BlackRock, Inc. | $25.1M | 250,000 | Hold |
| 3 | Hummer Financial Advisory Services Inc | $3.1M | 31,000 | Trimmed |
| 4 | Cambridge Investment Research Advisors, Inc. | $2.7M | 27,312 | Added |
| 5 | CITADEL ADVISORS LLC | $2.7M | 27,109 | Added |
| 6 | Tower Research Capital LLC (TRC) | $2.4M | 24,078 | New |
| 7 | GOLDMAN SACHS GROUP INC | $965,580 | 9,625 | New |
| 8 | SAPIENT CAPITAL LLC | $775,474 | 7,730 | New |
| 9 | Granite Bay Wealth Management, LLC | $633,000 | 6,314 | Added |
| 10 | Cypress Capital, LLC | $517,952 | 5,163 | New |
| 11 | JANE STREET GROUP, LLC | $501,399 | 4,998 | Trimmed |
| 12 | Royal Bank of Canada | $441,000 | 4,394 | Added |
| 13 | NORTHCAPE WEALTH MANAGEMENT, LLC | $401,280 | 4,000 | Trimmed |
| 14 | THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | $367,066 | 3,659 | Trimmed |
| 15 | SEARLE & CO. | $300,960 | 3,000 | Hold |
| 16 | Cetera Investment Advisers | $287,961 | 2,870 | New |
| 17 | NATIONAL BANK OF CANADA /FI/ | $165,311 | 1,648 | New |
| 18 | HARBOUR INVESTMENTS, INC. | $19,964 | 199 | New |
| 19 | WELLS FARGO & COMPANY/MN | $60 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30