Boston Scientific ( BSX) Company Profile: Boston Scientific is a maker of medical devices like stents and other specialty products used in cardiology and oncology. Tepper's Investment: Appaloosa bought 7.8 million shares of Boston Scientific in the fourth quarter, a stake that carried a market value of $41.6 million as of Dec. 31. Overall, the position represents 5.4% of Tepper's disclosed portfolio, making it his fifth largest position. Share Price Performance: Boston Scientific, whose shares plunged 30% in 2011, is a true value stock pick for Tepper. The stock has rallied more than 10% since Dec. 31. >>To see these stocks in action, visit the 6 Stocks Purchased by Billionaire David Tepper portfolio on Stockpickr. -- Written by Robert Holmes in Boston. >To contact the writer of this article, click here: Robert Holmes. >To follow Robert Holmes on Twitter, go to http://twitter.com/RobTheStreet. >To submit a news tip, send an email to: firstname.lastname@example.org.