AMBC (AMBC)
Ambac Financial Group, Inc.
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USAmbac Financial Group, Inc. operates as a financial services holding company, providing financial guarantees across a wide international footprint, including the United States, the United Kingdom, Italy, Austria, Australia, and France.
Its diverse offerings include financial guarantee insurance policies, specialty property and casualty program insurance, credit derivative agreements, and interest rate derivative transactions.
Additionally, the company delivers managing general agency and underwriting services. Ambac was established in 1991 and maintains its corporate headquarters in New York, New York.
Leadership
Claude LeBlanc
President, Chief Executive Officer & Director
Daniel McGinnis
Senior Managing Director, Chief Operating Officer
David Barranco
Senior Managing Director
David Trick
Executive Vice President, Chief Financial Officer & Treasurer
Employees
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Country
US
Sector
Financial Services
Website
octavegroup.com
| Insider | Title | Type | Shares | Value | Date |
|---|---|---|---|---|---|
 Smith R Sharon | Exec VP & Group COO | Purchase | 20 | $205 | Nov 12, 2025 |
 Trick David | Exec VP, CFO & Treasurer | Grant/Award | 350.4K | -- | Oct 3, 2025 |
| Smith R Sharon | Exec VP & Group COO | Grant/Award | 55.4K | -- | Oct 3, 2025 |
 LeBlanc Claude | Chief Executive Officer | Grant/Award | 232.8K | -- | Oct 3, 2025 |
| Smith R Sharon | Exec VP & Group COO | Grant/Award | 284.1K | -- | Oct 3, 2025 |
| LeBlanc Claude | Chief Executive Officer | Grant/Award | 500.0K | -- | Oct 3, 2025 |
| Name | Shares | % | Source |
|---|---|---|---|
Theodore Walker Cheng-De King 2 · may incl. warrants· stale · filed Apr 2024 | 301.7M | 6.3% | 13G |
BlackRock, Inc. | 4.6M | -- | 13F |
BlackRock, Inc. · filed Oct 2025 | 3.5M | 7.6% | 13G |
Western Standard LLC | 2.2M | -- | 13F |
Western Standard LLC · also on 13F· may incl. warrants· filed May 2026 | 2.2M | 5.0% | 13G |
Dimensional Fund Advisors LP · filed Oct 2025 | 2.1M | 4.6% | 13G |
VANGUARD CAPITAL MANAGEMENT LLC | 2.0M | -- | 13F |
PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | 1.6M | -- | 13F |
THIRD AVENUE MANAGEMENT LLC | 1.3M | -- | 13F |
Bain Capital Credit, LP | 1.1M | -- | 13F |
Insiders
- Smith R SharonExec VP & Group COO
- Trick DavidExec VP, CFO & Treasurer
- LeBlanc ClaudeChief Executive Officer
- Matus Kristi AnnDirector
- LAMMTENNANT JOAN MDirector
- IGLESIAS LISA GDirector
- HAFT IAN DAVIDDirector
- PRICE MICHAEL DDirector
- Stein Jeffrey ScottDirector
- Ksenak Stephen MichaelSr. MD & General Counsel
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