Here are the 10-K annual reports from The Hanover Insurance Group, Inc. (THG) in our archive since June 2025, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 10-K covers the audited annual report, with the full financial statements, so if you follow THG and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full THG filings page.
The Hanover Insurance Group, Inc. is a Delaware-based holding company focused on U.S. property and casualty insurance sold through independent agents and brokers. For 2025, it generated approximately $6.3 billion in net premiums written, an increase of 3.9% from the prior year.
Business is organized into four segments: Core Commercial, Specialty, Personal Lines and Other. In 2025, Core Commercial wrote $2.3 billion of net premiums, Specialty $1.4 billion, and Personal Lines $2.6 billion, providing a diversified mix across commercial and personal auto, property and liability coverages.
Premiums are geographically concentrated, with Michigan and Massachusetts together representing 26.7% of total net premiums written. The company highlights exposure to catastrophe events, relies on extensive reinsurance (including catastrophe bonds), and carried a GAAP loss and loss adjustment expense reserve of $7.8 billion and investment assets and cash of $11.5 billion at December 31, 2025.