PRIMECAP Management acquired 20.5M KLA shares worth $3.47B. That's 2.14% of their equity portfolio (8th largest holding). The investor owns 1.47% of the outstanding KLA stock. The first KLA trade was made in Q1 2013. Since then PRIMECAP Management bought shares fourteen more times and sold shares on 39 occasions. The stake costed the investor $126M, netting the investor a gain of 2662% so far.