Joel Greenblatt acquired 65.7 Thousand Iron Mountain shares worth $6.74 Million. That's 0.05% of their equity portfolio (443rd largest holding). The first Iron Mountain trade was made in Q4 2015. Since then Joel Greenblatt bought shares sixteen more times and sold shares on thirteen occasions. The stake costed the investor $4.23 Million, netting the investor a gain of 59% so far.