15 institutions reported holding $2.8M of SOUND GROUP INC (SOGP) in SEC 13F filings for 2026-06-30. Largest institutional holders: Ma Investment Partnership, LP ($1.1M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.1M), SIMPLEX TRADING, LLC ($234,602), CITADEL ADVISORS LLC ($173,988), Alpine Global Management, LLC ($112,733). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Ma Investment Partnership, LP | $1.1M | 100,000 | Hold |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.1M | 97,800 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $234,602 | 20,900 | Added |
| 4 | CITADEL ADVISORS LLC | $173,988 | 15,500 | Trimmed |
| 5 | Alpine Global Management, LLC | $112,733 | 10,043 | New |
| 6 | GROUP ONE TRADING LLC | $27,019 | 2,407 | Trimmed |
| 7 | RHUMBLINE ADVISERS | $21,281 | 1,896 | Added |
| 8 | UBS Group AG | $8,183 | 729 | Added |
| 9 | JONES FINANCIAL COMPANIES LLLP | $3,587 | 318 | Trimmed |
| 10 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $1,208 | 108 | Added |
| 11 | MORGAN STANLEY | $786 | 70 | Hold |
| 12 | Physician Wealth Advisors, Inc. | $539 | 48 | Hold |
| 13 | SBI Securities Co., Ltd. | $112 | 10 | Hold |
| 14 | Federation des caisses Desjardins du Quebec | $34 | 3 | Hold |
| 15 | BNP PARIBAS FINANCIAL MARKETS | $0 | 0 | Exited |
来源：SEC 13F 申报文件 · 截至 2026-06-30