Joel Greenblatt acquired 182 Thousand Mastec shares worth $31.1 Million. That's 0.25% of their equity portfolio (32nd largest holding). The first Mastec trade was made in Q1 2011. Since then Joel Greenblatt bought shares eighteen more times and sold shares on seventeen occasions. The stake costed the investor $15.7 Million, netting the investor a gain of 98% so far.