Significant Ownership of GROUP ONE TRADING LLC
- Large-stake filing summary
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- Recent SEC Schedule 13D/G filings for GROUP ONE TRADING LLC focus on large-stake beneficial ownership disclosures and amendments.
- Use this view to spot new large holders, amended positions, and activist-style ownership evidence.
- Signature and title
- Kyle Tondo-Kramer - Chief Compliance Officer
- Location
- Chicago, IL
Large-stake snapshot
1 signal
Manager
2 identity fields
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Significant Ownership of GROUP ONE TRADING LLC
| Sym | Company | Class | Ownership | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|---|
| QNCX | Quince Therapeutics, Inc. | Common Stock, par value $0.0001 par value | 11% | $3,625,173 | 5,942,906 | GROUP ONE TRADING LLC | 28 Feb 2026 | ||
| RILY | B. Riley Financial, Inc. | Common Stock, par value $0.0001 par value | 2.8% | $2,473,106 | -$2,636,967 | 852,795 | -52% | GROUP ONE TRADING LLC | 31 Mar 2025 |
Schedules 13D/G Reported by GROUP ONE TRADING LLC:
| Sym | Target | Class | Ownership | Change | Current shares | Change | Value | Reporting name | Form | Report period | Filing date |
|---|
Schedule rows are parsed from SEC 13D/G filings. Open the linked filing or target page to verify the reported ownership and shares.