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Learn more about our businesses.

Through our underwriting companies, we offer a broad range of specialty insurance products and services. Each OneBeacon business is managed by an experienced team of specialty insurance professionals focused on the industries they know well.

A.W.G. Dewar

A.W.G Dewar has been a leading provider of tuition reimbursement insurance since 1930. Dewar’s product protects both schools and parents from the financial consequences of a student’s withdrawal or dismissal from school.

International Marine Underwriters

International Marine Underwriters offers a full range of ocean marine insurance solutions.

212.440.6544 | MODONOVAN@IMU.COM

OneBeacon Accident & Health

OneBeacon Accident & Health focuses on analyzing and developing unique accident solutions and programs for transportation, specialty health and the sharing economy.

OneBeacon Entertainment

OneBeacon Entertainment provides specialized commercial and professional products and coverage for the entertainment and media industries, as well as live events.

OneBeacon Environmental

OneBeacon Environmental offers environmental risk solutions such as pollution liability, environmental premises and excess liability for a wide range of industries including environmental and general contractors, artisans, consultants and environmental-related facilities and businesses.

OneBeacon Financial Institutions

OneBeacon Financial Institutions specializes in professional liability, management liability and fidelity coverages for a wide range of financial institutions.

OneBeacon Financial Services

OneBeacon Financial Services offers property and casualty coverages for commercial banks, savings banks and savings and loan institutions, security broker-dealers, investment advisers, insurance companies and credit unions.

OneBeacon Government Risks

OneBeacon Government Risks provides solutions for midsized municipalities and counties, special districts and other publicly funded agencies.

OneBeacon Healthcare Group

OneBeacon Healthcare Group specializes in professional liability and other coverages for physician and physician groups, medical facilities and providers and managed care organizations.

OneBeacon Inland Marine

OneBeacon Inland Marine provides a wide range of inland marine and related property coverage solutions for the construction, transportation and fine arts industries.

OneBeacon Management Liability

OneBeacon Management Liability offers D&O, EPL, fiduciary, crime and employed lawyers professional liability insurance for nonprofit organizations, healthcare organizations and private for-profit companies.

OneBeacon Specialty Property

OneBeacon Specialty Property provides a broad range of commercial property and inland marine coverages and focuses entirely on excess placements.

OneBeacon Surety Group

OneBeacon Surety Group offers a broad range of commercial bonds targeting Fortune 2500 and large private companies. Small commercial bonds--less than $500k--are also available online through bond-click.com.

OneBeacon Technology Insurance

OneBeacon Technology Insurance delivers all-lines solutions for the technology industry including infotech, cleantech, life science, electronics and telecommunications, including international exposures.