Joel Greenblatt's position in American Tower Corp. is currently worth $2.98 Million. That's 0.11% of their equity portfolio (240th largest holding). The first American Tower Corp. trade was made in Q1 2015. Since then Joel Greenblatt bought shares seven more times and sold shares on five occasions. The stake costed the investor $2.12 Million, netting the investor a gain of 41% so far.