Ken Griffin acquired 1.06 Million West Pharmaceutical Services shares worth $349 Million. That's 0.36% of their equity portfolio (36th largest holding). The investor owns 1.46% of the outstanding West Pharmaceutical Services stock. The first West Pharmaceutical Services trade was made in Q2 2013. Since then Ken Griffin bought shares 49 more times and sold shares on 40 occasions. The investor's estimated purchase price is $361 Million, resulting in a loss of 3.5%.