Octave Specialty Group is a global specialty insurance firm building a platform of managing general agent (MGA) businesses across the United States, the United Kingdom, and Bermuda. Formerly known as Ambac, the company provides its businesses with strategic direction, risk oversight, data and technology solutions, and capital support. Octave builds and acquires innovative MGAs serving complex, evolving markets, partnering with experienced leaders to strengthen, scale, and differentiate their operations. Its businesses maintain distinct identities while sharing an emphasis on innovation, expertise, and entrepreneurship, creating a balanced portfolio.

Through its Octave Ventures and Octave Partners businesses, the group supports controlled and partnered MGA programs. The company reports more than $2.0 billion in available third-party capacity, over $1.3 billion in 2025 premium production, nine MGAs launched since 2024, and more than 45 controlled and partnered MGA programs. Octave Specialty Group also provides investor information and resources, including financial results, annual reports, stock information, and corporate governance materials.