15 institutions reported holding $5.7M of SOUND GROUP INC (LIZI) in SEC 13F filings for 2026-03-31. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($2.8M), Ma Investment Partnership, LP ($1.7M), GROUP ONE TRADING LLC ($556,112), CITADEL ADVISORS LLC ($406,808), SIMPLEX TRADING, LLC ($186,405). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2.8M | 167,500 | Added |
| 2 | Ma Investment Partnership, LP | $1.7M | 100,000 | Hold |
| 3 | GROUP ONE TRADING LLC | $556,112 | 32,945 | Trimmed |
| 4 | CITADEL ADVISORS LLC | $406,808 | 24,100 | Trimmed |
| 5 | SIMPLEX TRADING, LLC | $186,405 | 11,043 | Trimmed |
| 6 | RHUMBLINE ADVISERS | $31,833 | 1,886 | Trimmed |
| 7 | JONES FINANCIAL COMPANIES LLLP | $14,187 | 850 | Hold |
| 8 | UBS Group AG | $10,044 | 595 | Added |
| 9 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $1,688 | 100 | Hold |
| 10 | MORGAN STANLEY | $1,182 | 70 | Trimmed |
| 11 | Physician Wealth Advisors, Inc. | $811 | 48 | Hold |
| 12 | BNP PARIBAS FINANCIAL MARKETS | $338 | 20 | Trimmed |
| 13 | SBI Securities Co., Ltd. | $169 | 10 | Trimmed |
| 14 | Federation des caisses Desjardins du Quebec | $51 | 3 | Hold |
| 15 | Caitong International Asset Management Co., Ltd | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31