2 institutions reported holding $251,440 of SOUND GROUP INC (LIZI) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($234,602), GROUP ONE TRADING LLC ($16,838). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $234,602 | 20,900 | Added |
| 2 | GROUP ONE TRADING LLC | $16,838 | 1,500 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30