Joel Greenblatt acquired 10.7 Thousand Transdigm Group Incorporated shares worth $13.3 Million. That's 0.24% of their equity portfolio (54th largest holding). The first Transdigm Group Incorporated trade was made in Q2 2011. Since then Joel Greenblatt bought shares 23 more times and sold shares on 22 occasions. The stake costed the investor $6.3 Million, netting the investor a gain of 111% so far.