Jim Simons acquired 69 Thousand Westlake shares worth $10.3 Million. That's 0.02% of their equity portfolio (911th largest holding). The first Westlake trade was made in Q2 2013. Since then Jim Simons bought shares twenty more times and sold shares on twelve occasions. The stake costed the investor $8.63 Million, netting the investor a gain of 19% so far.