Joel Greenblatt acquired 168 Thousand Mastec shares worth $24.8 Million. That's 0.25% of their equity portfolio (41st largest holding). The first Mastec trade was made in Q1 2011. Since then Joel Greenblatt bought shares seventeen more times and sold shares on seventeen occasions. The stake costed the investor $13.8 Million, netting the investor a gain of 79% so far.