Joel Greenblatt acquired 17.8 Thousand Transdigm Group Incorporated shares worth $24.7 Million. That's 0.25% of their equity portfolio (42nd largest holding). The first Transdigm Group Incorporated trade was made in Q2 2011. Since then Joel Greenblatt bought shares 26 more times and sold shares on 23 occasions. The stake costed the investor $12.4 Million, netting the investor a gain of 98% so far.