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 2015. 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).

The NAIC publishes a list of the largest 25 P&C insurers each year. 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.

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


RankInsurer NameDirect Premiums Written ($bn)Comments
1State Farm59.3Mostly personal lines. Offers some coverages for small businesses. State Farm sells products through captive agents.
2Allstate30.1Mostly personal lines. Offers some coverages for small businesses. Allstate's products are distributed via captive agents. 
3Berkshire Hathaway29.9Owns GEICO and various specialty insurers including Medical Protective Co., National Indemnity, and Berkshire Hathaway Specialty.
4Liberty Mutual29.8A 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.
5Travelers23.2A U.S. company that offers insurance for both businesses and individuals. Owns St. Paul Fire & Marine.
6Progressive21.3Personal lines coverages only
7Nationwide19.5Mostly personal lines. Offers some coverages for small businesses. Nationwide's products are distributed via captive agents.
8Farmers19.0Personal and commercial lines. Farmers sells products through captive agents.
9AIG18.9Global company that owns dozens of subsidiaries worldwide. A major provider of commercial insurance, including specialty coverages. Has reduced its size in recent years by selling subsidiaries.
10USAA16.7Products available only to current and former members of the U.S. military
11Zurich11.8Global company based in Switzerland. Offers standard and specialty insurance to businesses.
12Hartford11.1U.S. company that offers coverage for businesses and individuals
13Chubb Insurance Group10.4A global firm purchased by ACE in 2016. The combined firm is called Chubb. Offers personal and commercial lines, including many specialty coverages.
14Chubb Ltd.10.1The parent company of Chubb Insurance Group
15CNA9.6Global company that offers both standard and specialty coverages for businesses
16American Family7.2Mostly personal lines. Some business coverages. Sells products through captive agents or directly to buyers.
17Ameritrust7.1Owns Meadowbrook Insurance, Star Insurance, and other specialty insurers
18Tokyo Marine Holdings6.1A global company based in Japan. Owns the Philadelphia Insurance Companies, which offers professional liability and other commercial coverages.
19Auto Owners5.9Offers both personal and commercial insurance coverages (not just auto) through independent agents in the Midwest and Southeast
20Erie Insurance5.9Offers personal and commercial coverages through independent agents in some midwestern and midatlantic states
21American Financial5.4Owns Great American Insurance, a provider of specialty property and casualty coverages such as aviation, healthcare and surplus lines
22WR Berkley53Provides many types of specialty coverages through its subsidiaries
23Assurant4.9Personal lines only
24QBE4.7Global insurer based in Australia. Offers commercial property and casualty insurance
25Cincinnati4.4U.S. company that offers personal and commercial coverages