Joel Greenblatt acquired 6.53 Thousand PTC shares worth $1.06 Million. That's 0.01% of their equity portfolio (832nd largest holding). The first PTC trade was made in Q1 2013. Since then Joel Greenblatt bought shares fourteen more times and sold shares on sixteen occasions. The stake costed the investor $588 Thousand, netting the investor a gain of 81% so far.