6 institutions reported holding $7.5M of GRINDR INC (GRND.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: HRT FINANCIAL LP ($5.7M), GROUP ONE TRADING LLC ($1.1M), IMC-Chicago, LLC ($575,484), SIMPLEX TRADING, LLC ($153,543), SUMMIT SECURITIES GROUP LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | HRT FINANCIAL LP | $5.7M | 473,400 | New |
| 2 | GROUP ONE TRADING LLC | $1.1M | 89,900 | Trimmed |
| 3 | IMC-Chicago, LLC | $575,484 | 47,600 | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $153,543 | 12,700 | Trimmed |
| 5 | SUMMIT SECURITIES GROUP LLC | $0 | 0 | Exited |
| 6 | Groupe la Francaise | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31