Ken Griffin acquired 16.1 Thousand FormFactor shares worth $604 Thousand. That's 0.00% of their equity portfolio (3341st largest holding). The first FormFactor trade was made in Q2 2013. Since then Ken Griffin bought shares 35 more times and sold shares on 38 occasions. The stake costed the investor $427 Thousand, netting the investor a gain of 41% so far.