Ken Griffin's position in Interdigital is currently worth $31.5 Million. That's 0.03% of their equity portfolio (616th largest holding). The investor owns 1.10% of the outstanding Interdigital stock. The first Interdigital 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 $27.8 Million, netting the investor a gain of 13% so far.