6. Tenet Healthcare ( THC) Company Profile: Tenet Healthcare is a health-care-services company whose subsidiaries and affiliates mainly operates general hospitals and related health-care facilities. Paulson's Investment: Paulson & Co. purchased 20 million shares of the healthcare company, worth $124 million as of June 30. Share Price Performance: Tenet Healthcare has been a dog this year, tumbling 24% in 2011. If Paulson continues to hold a position in the stock, he is down 19% in the position since June 30.