5 institutions reported holding $48.5M of RUSH STREET INTERACTIVE INC (RSI.WS) in SEC 13F filings for 2026-06-30. Largest institutional holders: COOPER CREEK PARTNERS MANAGEMENT LLC ($40.6M), IMC-Chicago, LLC ($5.0M), SIMPLEX TRADING, LLC ($2.0M), GROUP ONE TRADING LLC ($666,176), HRT FINANCIAL LP ($255,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | COOPER CREEK PARTNERS MANAGEMENT LLC | $40.6M | 1.4M | New |
| 2 | IMC-Chicago, LLC | $5.0M | 168,100 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $2.0M | 68,300 | Trimmed |
| 4 | GROUP ONE TRADING LLC | $666,176 | 22,400 | Trimmed |
| 5 | HRT FINANCIAL LP | $255,000 | 8,600 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30