Octave Specialty Group Inc (OSG) is a specialty property and casualty insurance company that operates as both an insurance carrier and an insurance distributor. It makes money through net premiums written on casualty-focused programs underwritten by its carrier subsidiary Everspan, plus commission income and program fees earned by its insurance distribution segment. OSG reported gross premiums written of $360.4M for the year ended December 31, 2025, down from $382.8M in FY2024, across 25 active programs in approximately ten lines of business with a focus on the casualty sector and minimal property exposure. Commission income was $131.0M for FY2025, up from $83.0M in FY2024, driven by organic growth and the acquisitions of Octave Ventures in July 2024 and ArmadaCorp in October 2025. Everspan retained 20.5% of gross premiums written in FY2025. The company operates two reporting segments: Specialty Property and Casualty Insurance and Insurance Distribution, alongside a Corporate and Other segment.

Revenue model

Revenue comes from three primary streams: net premiums written through the Everspan carrier subsidiaries (retaining up to 30% of each program, at 20.5% retention in FY2025), commission income from managing general agent and underwriter operations ($131.0M in FY2025), and program fees ($14.3M in FY2025). Profit commissions added $12.4M in FY2025.

Products and services

Specialty property and casualty insurance programs written through Everspan Indemnity and Everspan Insurance subsidiaries; managing general agent and underwriter (MGA/MGU) services through the Insurance Distribution segment including Octave Ventures (acquired July 2024) and ArmadaCorp (acquired October 2025); and the Xchange platform within the distribution segment.

Customers and end markets

Program-based specialty casualty insurance buyers across approximately ten lines of business, served through 25 active programs as of December 31, 2025. Programs are distributed through third-party producers and internal MGA/MGU operations.

Value-chain role

OSG occupies two positions in the insurance value chain: as a risk-bearing carrier (through Everspan subsidiaries that retain a portion of each program) and as a fee-earning intermediary (through MGA/MGU entities that place and administer specialty programs). The carrier subsidiaries are regulated by state insurance departments, the Bermuda Monetary Authority, and Lloyd's of London for the Octave Ventures operations.

Geographic exposure

Primarily U.S.-based operations, with subsidiaries licensed across multiple U.S. states including New York. Octave Ventures also requires approval from Lloyd's of London and the Bermuda Monetary Authority, indicating an international regulatory footprint. Specific geographic revenue splits are not disclosed in the filing excerpts.

Source: SEC 10-K, filed 2026-03-04

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