3 institutions reported holding $1.4M of SURO CAPITAL CORP (SSSSL) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($703,647), GROUP ONE TRADING LLC ($679,014), SIMPLEX TRADING, LLC ($65,331). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $703,647 | 65,700 | Added |
| 2 | GROUP ONE TRADING LLC | $679,014 | 63,400 | Added |
| 3 | SIMPLEX TRADING, LLC | $65,331 | 6,100 | Added |
Source: SEC Form 13F filings · as of 2026-03-31