Ken Griffin acquired 737 Thousand Groupon shares worth $21.3 Million. That's 0.02% of their equity portfolio (819th largest holding). The investor owns 2.00% of the outstanding Groupon stock. The first Groupon trade was made in Q2 2013. Since then Ken Griffin bought shares 58 more times and sold shares on 56 occasions. The stake costed the investor $9.13 Million, netting the investor a gain of 133% so far.