HANOVER INSURANCE GROUP INC

Primary business operations include insurance products and services currently provided through four reporting segments: Core Commercial, Specialty, Personal Lines and Other. Core Commercial includes commercial multiple peril, commercial automobile, workers’ compensation, and other commercial lines coverages provided to small and mid-sized businesses. Specialty includes four divisions of business: Professional and Executive Lines, Specialty P&C, Marine, and Surety and Other. Specialty P&C includes coverages such as program business (providing commercial insurance to markets with specialized coverage or risk management needs related to groups of similar businesses), specialty industrial and commercial property, excess and surplus lines and specialty general liability coverage. Personal Lines includes personal automobile, homeowners and other personal coverages, such as umbrella. The “Other” segment includes earnings on holding company assets; holding company and other expenses, including certain costs associated with retirement benefits due to our former life insurance employees and agents; and our run-off voluntary assumed property and casualty pools, run-off direct asbestos and environmental, and product liability businesses. Also included in the “Other” segment during the first half of 2024 and prior were the operations of Opus Investment Management, Inc. (“Opus”), which provided investment management services to THG, as well as institutions, pension funds, and other organizations. During the second and third quarters of 2024, we exited all of Opus’ business operations serving unaffiliated entities. Investment management services provided by Opus to THG related to its investment-grade fixed maturities portfolio were also transferred to an external manager during the second quarter of 2024.

We report interest expense on debt separately from the earnings of our reporting segments. This consists primarily of interest on our senior and subordinated debentures.