Joel Greenblatt acquired 29.3 Thousand Gartner shares worth $11.7 Million. That's 0.09% of their equity portfolio (284th largest holding). The first Gartner trade was made in Q2 2014. Since then Joel Greenblatt bought shares fifteen more times and sold shares on thirteen occasions. The stake costed the investor $7.35 Million, netting the investor a gain of 59% so far.