Octave Specialty Group Inc SEC filings OSG
Octave Specialty Group Inc has 1,000 filings in SEC EDGAR's recent list, going back to Oct 12, 2010. Its latest annual report, Form ARS, was filed on Apr 10, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 6, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 27, 2026 | — |
| 4 | Insider transaction | Oct 6, 2026 | Oct 3, 2026 |
| 4 | Insider transaction | Oct 6, 2026 | Oct 3, 2026 |
| 4 | Insider transaction | Oct 6, 2026 | Oct 3, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 7, 2026 | Jul 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 11, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 11, 2026 | — |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 25, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4/A | Form 4/a | Mar 3, 2026 | Sep 29, 2025 |
| 4/A | Form 4/a | Mar 3, 2026 | Sep 29, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 11, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 3 | Initial insider ownership | Dec 17, 2025 | Dec 11, 2025 |
| 4 | Insider transaction | Nov 14, 2025 | Nov 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 9, 2025 | — |
| 4/A | Form 4/a | Oct 3, 2025 | Oct 3, 2025 |
| 4/A | Form 4/a | Oct 3, 2025 | Oct 3, 2025 |
| 4/A | Form 4/a | Oct 3, 2025 | Oct 3, 2025 |
| 4 | Insider transaction | Oct 3, 2025 | Oct 3, 2025 |
| 4 | Insider transaction | Oct 3, 2025 | Oct 3, 2025 |
| 4 | Insider transaction | Oct 3, 2025 | Oct 3, 2025 |
| 4/A | Form 4/a | Oct 3, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 29, 2025 |
| 3 | Initial insider ownership | Sep 30, 2025 | Sep 29, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 11, 2025 | Aug 11, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 14, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 3, 2025 | — |
| 4 | Insider transaction | Apr 3, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 11, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 4, 2024 | — |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Sep 27, 2024 | Sep 26, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| SC 13G | Ownership over 5% (passive) | Apr 5, 2024 | — |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Mar 3, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 28, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| 4 | Insider transaction | Feb 23, 2024 | Feb 21, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 22, 2024 | — |
| 4 | Insider transaction | Jan 2, 2024 | Jan 1, 2024 |
| 4 | Insider transaction | Jan 2, 2024 | Jan 1, 2024 |
| 4 | Insider transaction | Jan 2, 2024 | Jan 1, 2024 |
| 4 | Insider transaction | Jan 2, 2024 | Jan 1, 2024 |
| 4 | Insider transaction | Jan 2, 2024 | Jan 1, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Surety Insurance (SIC 6351)
- Listed as
- OSG (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- New York, NY
- SEC filer status
- Accelerated filer
- SEC CIK
- 874501
- Former names
- AMBAC FINANCIAL GROUP INC (until Nov 10, 2025); AMBAC INC /DE/ (until Jan 2, 1998)
Other Surety Insurance companies
- Old Republic International Corp ORI
- Essent Group Ltd. ESNT
- Mgic Investment Corp MTG
- Radian Group Inc RDN
- NMI Holdings, Inc. NMIH
- Assured Guaranty Ltd AGO
- Mbia Inc MBI
Source: SEC EDGAR filings. This is company-reported data, not investment advice.