The Hanover Insurance Group, Inc. is the holding company, which is engaged in the business of property and casualty insurance products and services. The Company operates through three segments: Core Commercial, Specialty, Personal Lines and Other. Core Commercial product suite provides agents and customers with products designed for small and mid-sized businesses. Core Commercial segment coverages include commercial multiple peril, workersâ compensation, and other core commercial. Specialty segment offers a comprehensive suite of products focused predominately on small to mid-sized businesses. This includes various specialized products that are organized into four distinct divisions: Professional and Executive Lines, Specialty Property & Casualty, Marine, and Surety and Other. Personal Lines segment coverages include Personal automobile, and Homeowners and other personal lines. The Other segment primarily includes Opus, which provides investment advisory services to affiliates.
THE HANOVER INSURANCE GROUP, INC. 
