Joel Greenblatt's position in Westlake is currently worth $2.18 Million. That's 0.04% of their equity portfolio (558th largest holding). The first Westlake trade was made in Q4 2010. Since then Joel Greenblatt bought shares nineteen more times and sold shares on eighteen occasions. The stake costed the investor $1.54 Million, netting the investor a gain of 41% so far.