Cigna

http://www.cigna.com/
Cigna is one of the largest health service companies in the US market, it also operates internationally in 29 countries, and has approximately 66 million customer relationships worldwide. Headquartered in Bloomfield, Connecticut, Cigna serves its customers with nearly 30,000 dedicated employees.

Cigna is listed on the New York Stock Exchange (NYSE: CI) and is a component of the S&P 500 stock index.

More information about the company can be found at http://www.cigna.com/