Ken Griffin's position in Interactive Brokers Group is currently worth $59.8 Million. That's 0.06% of their equity portfolio (421st largest holding). The first Interactive Brokers Group trade was made in Q2 2013. Since then Ken Griffin bought shares 61 more times and sold shares on 48 occasions. The stake costed the investor $26.7 Million, netting the investor a gain of 124% so far.