19 institutions reported holding $25.1M of RUM GROUP INC (RUMBW) in SEC 13F filings for 2026-06-30. Largest institutional holders: GROUP ONE TRADING LLC ($7.4M), BOOTHBAY FUND MANAGEMENT, LLC ($4.9M), LMR Partners LLP ($2.6M), ZAZOVE ASSOCIATES LLC ($2.3M), SIMPLEX TRADING, LLC ($1.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $7.4M | 1.2M | Added |
| 2 | BOOTHBAY FUND MANAGEMENT, LLC | $4.9M | 780,000 | Added |
| 3 | LMR Partners LLP | $2.6M | 1.5M | Hold |
| 4 | ZAZOVE ASSOCIATES LLC | $2.3M | 1.2M | Trimmed |
| 5 | SIMPLEX TRADING, LLC | $1.8M | 278,000 | Added |
| 6 | NATIONAL BANK OF CANADA /FI/ | $1.7M | 2,649 | Trimmed |
| 7 | IMC-Chicago, LLC | $1.6M | 250,700 | Trimmed |
| 8 | CANTOR FITZGERALD, L. P. | $976,250 | 550,000 | Hold |
| 9 | ARISTEIA CAPITAL, L.L.C. | $938,258 | 504,440 | Hold |
| 10 | HRT FINANCIAL LP | $378,000 | 59,700 | Trimmed |
| 11 | D. E. Shaw & Co., Inc. | $188,632 | 106,572 | Hold |
| 12 | Private Advisor Group, LLC | $128,866 | 72,600 | Added |
| 13 | Hudson Bay Capital Management LP | $103,710 | 58,593 | Hold |
| 14 | MILLENNIUM MANAGEMENT LLC | $80,736 | 45,485 | Hold |
| 15 | Creative Planning | $38,163 | 21,500 | Hold |
| 16 | Stratos Wealth Partners, LTD. | $35,491 | 19,995 | Added |
| 17 | OSAIC HOLDINGS, INC. | $12,780 | 45 | Hold |
| 18 | LITTLEJOHN & CO LLC | $0 | 0 | Exited |
| 19 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30