TOP TEN HEALTH INSURANCE GROUPS BY DIRECT PREMIUMS WRITTEN, 2011 (1)

($ billions)

Rank Group Direct premiums written Market share
1 UnitedHealth Group Inc. $47.0 11.2%
2 WellPoint Inc. 44.7 10.7
3 Health Care Service Corporation 20.7 4.9
4 Humana Inc. 14.9 3.6
5 Highmark Inc. 12.2 2.9
6 Coventry Health Care Inc. 10.3 2.5
7 Kaiser Foundation Health Plan Inc. 10.3 2.5
8 Aetna Inc. 9.8 2.4
9 EmblemHealth Inc. 9.5 2.3
10 Independence Blue Cross 9.4 2.2

(1) Based on health insurer annual statement data. Does not include health insurance data from the property/casualty and life/health annual statements.

Source: SNL Financial LC.