David Tepper acquired 120 Thousand Lam Research shares worth $75.7 Million. That's 1.39% of their equity portfolio (21st largest holding). The first Lam Research trade was made in Q2 2006. Since then David Tepper bought shares eight more times and sold shares on nine occasions. The stake costed the investor $67.6 Million, netting the investor a gain of 12% so far.