Ken Griffin acquired 190 Thousand Amerisource Bergen shares worth $34.2 Million. That's 0.03% of their equity portfolio (598th largest holding). The first Amerisource Bergen trade was made in Q2 2013. Since then Ken Griffin bought shares 53 more times and sold shares on 46 occasions. The stake costed the investor $19.6 Million, netting the investor a gain of 74% so far.