Top 25 U.S. Property/Casualty Insurers

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Here is a list of the top 25 property/casualty insurance groups in the United States. The insurers are ranked based on direct premiums written in 2016. This term means all policy premiums collected by each insurer during the calendar year. It does not include any adjustment for premiums on risks that the insurer ceded (transferred) to reinsurance companies. 

The insurer rankings and premium information in the list below were provided by the National Association of Insurance Commissioners (NAIC).

This organization was created to assist insurance regulators in all 50 states. It sets standards and creates model laws that are implemented by the states. Each year, the NAIC publishes a list of the largest 25 P&C insurers. Besides rank and premium information, the NAIC's list also includes data on insurers' loss ratios and market share.

An insurance group is a collection of insurance companies that have common ownership. A group of insurers typically consists of a parent company and several subsidiaries. Insurance subsidiaries are often called "pups." Many insurers utilize subsidiaries to insure specific types of risks. For example, an insurer might issue commercial auto policies through one subsidiary and workers compensation policies through  another.

Most of the top 25 insurers are stock companies, but a few are mutual companies. These include the largest insurer (State Farm) and Liberty Mutual.

Stock insurers are owned by shareholders, while mutual insurers are owned by policyholders.

The following list includes some brief comments about each insurer group. Additional information is available from insurers' websites. 


RankInsurer NameDirect Premiums Written ($bn)Comments
1State Farm62.2Mostly personal lines. Offers some coverages for small businesses. State Farm sells products through captive agents.
2Berkshire Hathaway33.3Owns GEICO and various specialty insurers, including Medical Protective Co., National Indemnity, and Berkshire Hathaway Specialty.
3Liberty Mutual31.1A global company that offers commercial and personal insurance coverages. Includes Golden Eagle, Ohio Casualty, and Safeco. As a mutual insurer, it is owned by policyholders.
4Allstate30.9Mostly personal lines. Offers some coverages for small businesses. Allstate's products are distributed via captive agents. 
5Progessive23.9Sells personal lines coverages only. Products include homeowners, auto and boat insurance.
6Travelers23.9A U.S. company that offers insurance for both businesses and individuals. Owns St. Paul Fire & Marine and USF&G.
7Chubb Ltd. Grp.20.7A global firm purchased by ACE in 2016. The combined firm is called Chubb. Offers personal and commercial lines, including many specialty coverages.
8Nationwide19.8Mostly personal lines. Offers some coverages for small businesses. Nationwide's products are distributed via captive agents.
9Farmers Ins. Grp.19.7Personal and commercial lines. Farmers sells products through captive agents.
10USAA18.3Sells products to current and former members of the U.S. military. Offers auto, homeowners, flood, umbrella and other personal coverages.
11AIG15.5Global company that owns dozens of subsidiaries worldwide. A major provider of commercial insurance, including specialty coverages. Has reduced its size since its 2008 financial bailout by selling subsidiaries.
12Zurich Ins. Grp.12.9Global company based in Switzerland. Offers standard and specialty insurance to businesses of all sizes. Owns Farmers Insurance Group.
13Hartford11.3U.S. company that offers coverage for businesses and individuals
14CNA10.3Global company that offers both standard and specialty coverages for large and small businesses
15AmTrust Grp.9.5Multinational property and casualty insurer specializing in coverages for small to mid-sized businesses
16American Family7.8Mostly personal lines. Some business coverages. Sells products through captive agents or directly to buyers.
17Tokyo Marine Holdings6.4A global company based in Japan. Owns the Philadelphia Insurance Companies, which offers professional liability and other commercial coverages.
18Auto Owners6.3Offers both personal and commercial insurance coverages (not just auto) through independent agents in the Midwest and Southeast
19Erie Insurance6.3Offers personal and commercial coverages through independent agents in some midwestern and mid-Atlantic states
20WR Berkley5.7Owns a variety of subsidiaries, each of which specializes in a niche market. Companies include Acadia Insurance, Admiral Insurance and numerous insurers that use the Berkley name.
21American Financial5.6Owns Great American Insurance, a provider of specialty property and casualty coverages such as aviation, healthcare and surplus lines
22Assurant5.4Sells renters, homeowners and other personal lines coverages
23Cincinnati4.6U.S. company that offers personal and commercial coverages through independent agents
24XL Amer. Grp.4.5Global company based in Bermuda. Provides many types of specialty coverages, such as aviation liability, pollution liability and healthcare professional liability. Owns a number of subsidiaries, including Catlin Grp., which it acquired in 2015.
25QBE4.5Global insurer based in Australia. Offers commercial property and casualty insurance