Home Services Secure Carrier Portal Staff News Contact Founded in 1991, International Specialty Underwriters, Inc. (ISU) provides exceptional service to the stop loss industry, including claims, underwriting, marketing, and administration. ISU became part of Companion Life Insurance Company in 2008. This has allowed ISU to integrate the corporate structure model needed to sustain success and growth in a changing marketplace while providing the service of flexibility of the MGU entrepreneur model. In 2020, ISU was restructured to a division of Companion Life Insurance Company. Our commitment to Excellence in Service, People, and Product is what continues to guide our success in the industry. Our employees are committed to providing this excellence in everything we do, every day. We strive to understand the goals and business models of each client to support them with parallel strategies to meet common goals and objectives. ISU takes pride in its detail-oriented Carrier Business Model, created to understand the internal operational, financial, marketing strategies and goals needed to standout from competition and better service clients. The company currently markets, underwriters and services stop loss clients nationwide via direct marketing and as a backroom/white paper operation. With more than 30 years combined industry experience among its elite management staff, ISU provides clients with distinctive executive, underwriting, marketing, administration and claims competence.