The Hanover Insurance Group, Inc., also called Hanover Insurance, is a holding company that engages in the provision of property and casualty products and services. It operates through the following segments: Commercial Lines, Personal Lines and Other. Read More The Commercial Lines segment includes commercial multiple peril, commercial automobile, workers compensation and other commercial coverage, such as specialty program business, inland marine, management and professional liability and surety. The Personal Lines segment involves personal automobile, homeowners and other personal coverage. The Other segment operates through Opus Investment Management, Inc. The company was founded in 1852 and is headquartered in Worcester, MA. The listed name for THG is The Hanover Insurance Group, Inc.