As of my last update, here are ten of the largest insurance companies in the USA, ranked by total assets:
Berkshire Hathaway: Known for its CEO Warren Buffett, Berkshire Hathaway is a multinational conglomerate with substantial holdings in insurance, including GEICO, Berkshire Hathaway Assurance, and others.
UnitedHealth Group: Primarily focused on healthcare services through its subsidiaries like UnitedHealthcare, UnitedHealth Group is one of the largest health insurance providers in the country.
MetLife: MetLife offers a range of insurance and financial services, including life insurance, disability income insurance, and retirement solutions.
Prudential Financial: Prudential Financial provides a wide array of insurance and financial products, including life insurance, annuities, retirement planning, and investment management.
State Farm: State Farm is one of the largest providers of auto, homeowners, and life insurance in the USA, known for its extensive network of agents and customer service.
Allstate: Allstate Corporation offers auto, home, and life insurance products, as well as financial services such as retirement and investment planning.
Liberty Mutual: Liberty Mutual Group is a global insurer offering a diverse range of insurance products, including auto, home, and property insurance, as well as commercial coverages.
AIG (American International Group): AIG is a multinational finance and insurance corporation offering property casualty insurance, life insurance, retirement products, and other financial services.
Nationwide: Nationwide Mutual Insurance Company and its affiliates provide a range of insurance and financial services, including auto, home, life, and commercial insurance.
Progressive Corporation: Progressive is one of the largest auto insurance providers in the USA, known for its innovative policies and use of technology in the insurance industry.
These rankings can vary based on different metrics such as total assets, revenue, or market share, but these companies consistently rank among the top players in the insurance industry in the United States.