3 institutions reported holding $488,173 of DELCATH SYS INC (DCTH1) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($391,616), SIMPLEX TRADING, LLC ($94,655), Accent Capital Management, LLC ($1,902). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $391,616 | 42,200 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $94,655 | 10,200 | Trimmed |
| 3 | Accent Capital Management, LLC | $1,902 | 205 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31