Ken Griffin acquired 5.79 Million Western Digital shares worth $429 Million. That's 0.44% of their equity portfolio (24th largest holding). The investor owns 1.82% of the outstanding Western Digital stock. The first Western Digital trade was made in Q2 2013. Since then Ken Griffin bought shares 54 more times and sold shares on 48 occasions. The stake costed the investor $361 Million, netting the investor a gain of 19% so far.