Ken Griffin acquired 1 Thousand Collegium Pharmaceutical shares worth $34.8 Thousand. That's 0.00% of their equity portfolio (4647th largest holding). The first Collegium Pharmaceutical trade was made in Q1 2017. Since then Ken Griffin bought shares 30 more times and sold shares on 29 occasions. The stake costed the investor $25 Thousand, netting the investor a gain of 39% so far.