Joel Greenblatt's position in Costco Wholesale is currently worth $15.6M. That's 0.09% of their equity portfolio (315th largest holding). The first Costco Wholesale trade was made in Q4 2014. Since then Joel Greenblatt bought shares sixteen more times and sold shares on nineteen occasions. The stake costed the investor $6.54M, netting the investor a gain of 139% so far.