The Hanover Insurance Group, Inc. THG

THG Company Overview

The Hanover Insurance Group, Inc. is a U.S.-based property and casualty insurance holding company that operates primarily in the commercial, personal, and specialty insurance markets. The company underwrites insurance through its principal subsidiaries, The Hanover Insurance Company, Citizens Insurance Company of America, and Massachusetts Bay Insurance Company, serving a broad range of individual and business customers. Its core revenue is generated from insurance premiums and investment income derived from its investment portfolio.

The company is positioned as a relationship-driven insurer, distributing its products almost exclusively through a network of independent insurance agents and brokers. This model is intended to emphasize underwriting discipline, tailored coverage, and long-term agency partnerships. The Hanover Insurance Group traces its roots to 1852, when it was founded in Worcester, Massachusetts, and has evolved through organic growth and acquisitions into a diversified national insurer with a strong focus on middle-market commercial customers.