Joel Greenblatt acquired 32.6 Thousand Interactive Brokers Group shares worth $3.77 Million. That's 0.07% of their equity portfolio (379th largest holding). The first Interactive Brokers Group trade was made in Q2 2016. Since then Joel Greenblatt bought shares eleven more times and sold shares on six occasions. The stake costed the investor $2.16 Million, netting the investor a gain of 75% so far.