Octave Specialty Group, Inc.
Octave Specialty Group, Inc. (OSG) operates as a financial services holding company providing specialized insurance distribution and underwriting services. The company's website is www.octavegroup.com. Octave was formerly known as Ambac Financial Group, Inc. and rebranded in the fourth quarter of 2025 following the… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Octave Specialty Group, Inc. does
In the company’s own words
Octave Specialty Group, Inc. (OSG) operates as a financial services holding company providing specialized insurance distribution and underwriting services. The company's website is www.octavegroup.com. Octave was formerly known as Ambac Financial Group, Inc. and rebranded in the fourth quarter of 2025 following the sale of its Legacy Financial Guarantee business.
The company operates through two primary business segments. The Insurance Distribution segment encompasses a diversified portfolio of managing general agents and underwriters (MGAs/MGA-Us), an insurance broker, and other distribution and underwriting businesses. This segment places premiums across multiple lines including property, niche specialty risks, accident and health, specialty auto, professional lines, directors and officers coverage, marine and energy, surety, environmental, reinsurance, and miscellaneous specialty products. In 2025, the Insurance Distribution segment placed approximately $951.8 million in premiums, representing significant growth from $493.4 million in 2024. Notable acquisitions include ArmadaCorp Capital, LLC, a leading specialty accident and health MGA acquired in October 2025, and Octave Ventures, a London-based insurance underwriting platform acquired in July 2024 that specializes in incubating de-novo MGAs through Lloyd's syndicates.
The Specialty Property and Casualty Insurance segment operates through Everspan, a group of five insurance carriers holding an A.M. Best rating of A- (Excellent). Everspan generated $360.4 million in gross written premiums during 2025, focusing on diverse classes of commercial and personal liability risks accessed primarily through affiliated and non-affiliated program administrators. The company retains approximately 20.5 percent of underwritten business, with the remainder ceded to reinsurers and capacity providers.
Octave's business model emphasizes deep specialty domain knowledge, long-standing carrier relationships, and a partnership-based approach where MGA principals maintain direct economic alignment with business performance. The company operates within the estimated one trillion dollar U.S. property and casualty insurance market, with particular focus on the commercial MGA/U program market and the excess and surplus lines segment, which has demonstrated significant growth exceeding the admitted market.
Company details
- Sector
- Financials
- Industry (SIC)
- Insurance
- Headquarters
- NEW YORK, NY
- Fiscal year end
- December
- CIK
- 874501
- SIC
- 6351
Financial performance, year by year
Fiscal 2012–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Octave Specialty Group, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Octave Specialty Group, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Octave Specialty Group, Inc.’s bonds, as funds hold them
Funds report holding 2 issues of Octave Specialty Group, Inc.’s debt, $149.71M at market value — what funds hold, not the company’s total debt. Weighted-average coupon 4.71%, maturing 2099 to 2099.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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