Top 25 U.S. Property/Casualty Insurers

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Each year, the National Association of Insurance Commissioners (NAIC) publishes a list of the 25 largest property/casualty insurance groups in the United States. The insurers that made the "top 25" list for 2017 appear in the table below. The ranking is based on direct premiums written, which means all policy premiums collected by an insurer during the calendar year. It does not include any adjustment for premiums on risks the insurer ceded (transferred) to reinsurance companies.

 

The "top 25" list consists of the largest insurance groups. An insurance group is a collection of insurance companies that have common ownership. It is typically comprised of a parent company and several subsidiaries. Insurance subsidiaries are often called "pups." Many insurers own several subsidiaries, each of which they use to insure a specific type of risk. For example, an insurer might issue commercial auto policies through one subsidiary and workers compensation policies through another.

The insurers included in the NAIC's "top 25" list don't change much from year to year. Only two insurers on the 2017 list did not appear on the 2016 list. They are Fairfax Financial Group and Markel Corp. Likewise, two insurers dropped off the list in 2017, namely XL Group and QBE.

While most of the top 25 insurers are stock companies, a few are mutual companies. These include State Farm, Nationwide, 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 Farm64.8Mostly personal lines. Offers some coverages for small businesses. State Farm sells products through captive agents.
2Berkshire Hathaway38.4Owns GEICO and various specialty insurers, including MedPro Group, National Indemnity, General Re (a reinsurance company) and Berkshire Hathaway Specialty.
3Liberty Mutual Grp.33.8A global company that offers commercial and personal insurance coverages. Includes Golden Eagle, Ironshore, Wausau Insurance, and Safeco. As a mutual insurer, it is owned by policyholders.
4Allstate31.5Mostly personal lines. Offers some coverages for small businesses. While most of Allstate's products are distributed through captive agents, some are sold through independent agents
5Progessive27.8Sells personal lines coverages only. Products include homeowners, auto, and boat insurance.
6Travelers24.8A U.S. company that offers insurance for both businesses and individuals. Owns St. Paul Fire & Marine and USF&G.
7Chubb Ltd. Grp.21.2A global firm purchased by ACE in 2016. The combined firm is called Chubb. Offers personal and commercial lines, including many specialty coverages.
8USAA20.1Sells products to current and former members of the U.S. military. Offers auto, homeowners, flood, umbrella and other personal coverages.
9Farmers Ins. Grp.19.8Personal and commercial lines. Owns Farmers Insurance Exchange, Fire Insurance Exchange, and Truck Insurance Exchange. These are inter-insurance exchanges owned by their policyholders. Farmers sells products through captive agents.
10Nationwide19.2Mostly personal lines. Offers some coverages for small businesses. In the past, Nationwide distributed its products through captive agents. It is currently switching to a distribution system based on independent agents.
11AIG14.0Global company that owns dozens of subsidiaries worldwide. A major provider of commercial insurance, including personal and commercial lines and specialty coverages.
12Zurich Ins. Grp.13.0Global company based in Switzerland. Offers standard and specialty insurance to businesses of all sizes. Owns Farmers Insurance Group.
13Hartford11.1U.S. company that offers coverage for businesses and individuals
14CNA10.4Global company that offers both standard and specialty coverages for large and small businesses
15AmTrust Grp.10.2Multinational property and casualty insurer specializing in coverages for small businesses.
16American Family8.3A mutual insurance company that sells mostly personal lines. Offers some business coverages. Sells products through captive agents or directly to buyers.
17Auto Owners7.1Offers both personal and commercial insurance coverages (not just auto) through independent agents in the Midwest and Southeast
18Erie Insurance6.6Offers personal and commercial coverages through independent agents in some midwestern and mid-Atlantic states
19Tokyo Fire & Marine6.6A global company based in Japan. Owns the Philadelphia Insurance Companies, which offers professional liability and other commercial coverages.
20American Financial5.9Owns Great American Insurance, a provider of specialty property and casualty coverages for risks such as aviation, healthcare, and public entities.
21W.R. 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.
22Assurant5.6Sells renters, homeowners and other personal lines coverages
23Fairfax Fin. Grp.5.4A global company based in Toronto. Owns several insurers that operate in the U.S., including Zenith (which sells workers comp) and Crum & Forster (which sells property and casualty coverages).
24Cinncinnati fin Grp.4.7U.S. company that offers personal and commercial coverages through independent agents
25Markel Corp.4.4A global company based in the U.S. Offers specialized programs for unique risks such as health clubs, museums, horse stables, and special events.