U.S. insurance companies

Insurance
Insurance is the equitable transfer of the risk of a loss, from one entity to another in exchange for payment. It is a form of risk management primarily used to hedge against the risk of a contingent, uncertain loss.

An insurer, or insurance carrier, is a company selling the insurance; the insured, or policyholder, is the person or entity buying the insurance policy. The amount of money to be charged for a certain amount of insurance coverage is called the premium. Risk management, the practice of appraising and controlling risk, has evolved as a discrete field of study and practice.

The transaction involves the insured assuming a guaranteed and known relatively small loss in the form of payment to the insurer in exchange for the insurer's promise to compensate (indemnify) the insured in the case of a financial (personal) loss. The insured receives a contract, called the insurance policy, which details the conditions and circumstances under which the insured will be financially compensated.

Insurance in the United States

1. Ameritas Life Insurance Company  
2. Acuity
3. American International Group (AIG)
4. Aetna
5.  Aflac    
6. Allied Insurance
7. Allstate
8. 21st Century Insurance
9. American Automobile Association
10. American Family Insurance
11. Alleghany Corporation  
12. American Income Life Insurance Company
13.  American National Insurance Company
14.  Amica Mutual Insurance
15. ACE Limited   
16. Applied Underwriters
17.  Arbella Insurance Group
18.   Assurant
19.   Assurity Life Insurance Company
20.   Auto-Owners Insurance