3 institutions reported holding $1.7M of SURO CAPITAL CORP (SSSSL) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($1.0M), GROUP ONE TRADING LLC ($480,282), SIMPLEX TRADING, LLC ($210,672). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.0M | 81,300 | Added |
| 2 | GROUP ONE TRADING LLC | $480,282 | 38,300 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $210,672 | 16,800 | Added |
Source: SEC Form 13F filings · as of 2026-06-30