Ken Griffin's position in Interdigital is currently worth $6.17 Million. That's 0.01% of their equity portfolio (1391st largest holding). The first Interdigital trade was made in Q2 2013. Since then Ken Griffin bought shares 52 more times and sold shares on 47 occasions. The stake costed the investor $5.02 Million, netting the investor a gain of 23% so far.