Lists of good insurance companies are available at Investopedia.com and Insweb.com. The insurance companies available on their list are ranked by market capitalization and sales figures, according to Investopedia.
The top non-health insurance companies are Berkshire Hathaway, China Life Insurance and Allianz, as stated by Investopedia. For the Health Insurance category, Investopedia lists United Healthcare, Wellpoint and Aetna as the top three companies, as of 2015. Insweb.com has a list of U.S. property and casualty insurers, topped by State Farm Group, Allstate insurance Group and Liberty Mutual Insurance Cos. The companies on the Insweb list are measured by their net premiums written.