5. Aetna ( AET) supplies technology, integrated project management and information solutions to the oil and gas industry.

Net income during the second quarter of 2011 was $522.6 million compared with $494.6 million for the corresponding quarter of 2010. Operating earnings for the quarter were $512.9 million against $467.4 million during the same quarter prior year, driven by higher commercial underwriting margins. Total revenue was $7.7 billion versus $7.9 billion during the second quarter of 2010.

The company intends to be diversified player and acquire new capabilities, Mark T. Bertolini, CEO of Aetna, said, "I am pleased with the initial progress of our Accountable Care Solutions model for collaboration with high-quality health systems such as Carilion Clinic, Heartland Health and Emory Healthcare."

The stock has a buying rating of 57% and is likely to return 46% over the next one year. The scrip is trading at 7.4 times its estimated 2011 earnings.

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