Joel Greenblatt acquired 85.6 Thousand Mastec shares worth $7.17 Million. That's 0.13% of their equity portfolio (186th largest holding). The first Mastec trade was made in Q1 2011. Since then Joel Greenblatt bought shares fourteen more times and sold shares on sixteen occasions. The stake costed the investor $5.98 Million, netting the investor a gain of 20% so far.