Ken Griffin acquired 1.23 Million Gilead Sciences shares worth $133 Million. That's 0.13% of their equity portfolio (188th largest holding). The first Gilead Sciences trade was made in Q2 2013. Since then Ken Griffin bought shares 57 more times and sold shares on 57 occasions. The stake costed the investor $88.9 Million, netting the investor a gain of 50% so far.