Top 10 Insurance Companies You should Know

Top 10 Insurance Companies You Should Know: There are numerous ways to rank the size of insurance companies. It should be noted that Companies can be measured by their market capitalization (the value of the company on a stock exchange) or by equally using sales figures, such as net premiums written in a year or how many policies were sold.

Important Facts

  • Insurance companies play a major role in the global financial economy, although they may not be as flashy as investment banks or hedge funds.
  • Insurance companies come in different sizes and specialize in different policy lines, from health to life to property and casualty.
  • Here we compare some of the largest insurers by market cap and by premium sales.

The Largest Insurance companies by Market Capitalization

Investors can buy shares of publicly-traded companies in the insurance industry. The largest insurance companies as of 2018 by market capitalization on the world stock exchanges were:

Non-health Insurance Companies:   

Company NameMarket Capitalization
Berkshire Hathaway (
$308 billion
China Life Insurance(LFC)$80  billion
Allianz (AZSEY) $76.8 billion
American International Group (AIG)$72.3 billion
Ping An of China (PNGAY)$65.6 billion
MetLife (MET)$59.4 billion
$57.8 billion
AIA Group Hong Kong (AAIGF)$54.4 billion
ING Groep (ING)$54.4 billion
Zurich Insurance (ZURVY)$45.4 Billion

(Source: Thompson Reuters)


Health Insurance and Managed Health Care Companies:

Company Name                                  Market Capitalization
United Healthcare (UNH)$91.8 billion
Wellpoint (
$34.3 billion
Aetna (AET)$29.8 billion
CIGNA Corp. (CI)$26.8 billion
Humana (HUM)$21.1 billion
Centene Corp. (CNC)$5.7 billion
Health Net, Inc. (
$3.9 billion
WellCare Health Plans (WCG)$3.1 billion
Healthspring (
$3.7 billion
Molina Healthcare (MOH)$2.4 billion

(Source: Thompson Reuters)

Not all insurance companies are publicly traded. In fact, many insurers are structured as mutual companies where policyholders of participating policies are essentially partial owners of the company. The mutual company model for an insurance company dates back hundreds of years, and there are certain benefits conferred on policyholders that do not exist with publicly traded (stock company) insurers.

The Largest Insurance Companies by Sales and Product Line

It is very important to differentiate between the type of insurance, or line, that is being considered when considering the largest insurance companies. Using sales data is helpful as some of the largest insurance companies in the United States are not publicly traded and therefore their market value is not easily ascertained.

Property & Casualty

Property-casualty insurers write policies covering property such as real estate, dwellings, cars, and other vehicles. They also write policies dealing with liabilities that may be incurred by accident or negligence related to those properties to defray the cost of lawsuits or medical damages resulting from such incidents.

The top U.S. property casualty companies in 2018 by net premiums written (the amount of money that non-life policies can expect to receive over the life of the contract, less commissions and costs) are:

Company Net Premiums Written
State Farm Group$64.6 billion
Berkshire Hathaway (BRK.A) $46.0 billion 
Allstate Insurance Group (ALL)$30.6 billion 
Liberty Mutual$28.6 billion 
Progressive Insurance Group (PGR)$27.1 billion 
Travelers Group (TRV) $24.5 billion 
USAA Group$19.6 billion
Nationwide Group $18.8 billion
Farmers Insurance Group$14.3 billion 
American International Group (AIG)$14.2 billion 

(Source A.M. Best)

Life Insurance Companies

Life Insurance companies promise to pay out a lump sum benefit upon the death of the insured. Although actuarial science has created mortality tables to accurately estimate the future liability of policies to be paid, having financial strength ensures that these companies can meet all of their obligations while still earning a profit.

Life Insurance companies in the U.S. can be ranked by direct premium written(the amount of new policies written directly and not re-insured). For 2018:

 Company Total Direct Premium Market Share
Metropolitan Group (MET)$12.6 billion7.87%
Northwestern Mutual$10.1 billion6.29% 
New York Life Group$8.8 billion 5.48%
Prudential of America (PRU)$8.6 billion5.33%
Lincoln National$6.9 billion4.30%
MassMutual$6.6 billion 4.15%
Aegon (AEG)$4.6 billion 2.90%
John Hancock$4.4 billion2.84%
State Farm$4.0 billion2.73%
Guardian Life Insurance Co.$3.8 billion2.38%

(Source: NAIC)

Health Insurance Companies:

Health insurance companies provide policies to cover all or part of policyholder’s health and medical costs. Policies may be purchased individually or through an employer. Technically, the United States government is the largest health insurance provider in America through the Medicare program, Social Security and with Medicaid administered by individual states.

The largest non-government sponsored U.S. health insurance companies measured by total direct premium collected in 2016 was:

CompanyTotal Direct PremiumMarket Share
UnitedHealth Group (UNH)$125 billion12.90%
Kaiser Foundation Group$72.6 billion7.46%
Anthem Inc Group$59.8 billion6.15% 
Aetna Group (AET
$54.3 billion5.58% 
Humana Group $53.8 billion 5.53%
HCSC Group$32.3 billion3.31%
Centene Corp Group$25.7 billion2.64%
Cigna Health Group (CI)$24.0 billion 2.47%
Molina Healthcare Inc Group$17.8 billion 1.83%
Independence Health Group Inc Group$17.0 billion1.75% 

(Source: NAIC. Note: The sales data on insurance companies is from 2016, the last year of available data.)

The Bottom Line

Ranking the largest insurance companies can be done in a number of ways. Shares of publicly traded companies can be bought to help build a well-diversified investment portfolio that has exposure to the financial and healthcare sectors. Identifying which types of insurance a company primarily deals with helps determine which firms are competitors and which really are not. Looking at sales figures, or premiums collected in a year, one can also see how public companies stack up against privately held or mutual companies which make up a large segment of the industry.

The above data was taken from a different source to analyze the different level of some insurance companies. From the analysis, we have been able to come out with the Top 10 Insurance Companies. It is discovered that the companies are on Health, Life, Property, and Casualty. kindly share this information with friends on social media.

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