18 institutions reported holding $493,491 of MYSEUM INC (MYSE) in SEC 13F filings for 2026-06-30. Largest institutional holders: JANE STREET GROUP, LLC ($258,895), VANGUARD GROUP INC ($120,708), GEODE CAPITAL MANAGEMENT, LLC ($90,107), OSAIC HOLDINGS, INC. ($9,593), UBS Group AG ($9,344). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $258,895 | 102,736 | New |
| 2 | VANGUARD GROUP INC | $120,708 | 47,900 | Hold |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $90,107 | 35,757 | Trimmed |
| 4 | OSAIC HOLDINGS, INC. | $9,593 | 3,807 | Added |
| 5 | UBS Group AG | $9,344 | 3,708 | Added |
| 6 | Tower Research Capital LLC (TRC) | $3,024 | 1,200 | Trimmed |
| 7 | ASSETMARK, INC | $1,008 | 400 | Hold |
| 8 | IFP Advisors, Inc | $504 | 200 | Hold |
| 9 | SBI Securities Co., Ltd. | $179 | 71 | Trimmed |
| 10 | HARBOUR INVESTMENTS, INC. | $126 | 50 | Hold |
| 11 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $3 | 1 | New |
| 12 | TOTH FINANCIAL ADVISORY CORP | $0 | 0 | Exited |
| 13 | Russell Investments Group, Ltd. | $0 | 0 | Exited |
| 14 | FNY Investment Advisers, LLC | $0 | 0 | Exited |
| 15 | XTX Topco Ltd | $0 | 0 | Exited |
| 16 | COMMONWEALTH EQUITY SERVICES, LLC | $0 | 0 | Exited |
| 17 | Royal Bank of Canada | $0 | 0 | Exited |
| 18 | JONES FINANCIAL COMPANIES LLLP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30