OCTAVE SPECIALTY GROUP INC - OSG
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Feb 12, 2026 | SCHEDULE 13G | Western Standard LLC | 5.87% | 2,572,446 | View |
| Feb 11, 2026 | SCHEDULE 13G | JANE STREET GROUP, LLC | 5.4% | 2,377,754 | View |
| Feb 11, 2026 | SCHEDULE 13G | Jane Street Capital, LLC | 1.5% | 634,716 | View |
| Feb 11, 2026 | SCHEDULE 13G | Jane Street Options, LLC | 3.4% | 1,472,859 | View |
| Feb 11, 2026 | SCHEDULE 13G | Jane Street Global Trading, LLC | 0.6% | 270,179 | View |
| Nov 13, 2025 | SCHEDULE 13G/A | G1 Execution Services, LLC | 2.2% | 1,017,308 | View |
| Nov 13, 2025 | SCHEDULE 13G/A | SIG Brokerage, LP | 2.2% | 1,017,308 | View |
| Nov 13, 2025 | SCHEDULE 13G/A | Susquehanna Securities, LLC | 2.2% | 1,017,308 | View |
| Oct 17, 2025 | SCHEDULE 13G/A | BlackRock, Inc. | 7.6% | 3,535,664 | View |
| Oct 09, 2025 | SCHEDULE 13G/A | Dimensional Fund Advisors LP | 4.6% | 2,141,047 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.