Ken Griffin acquired 167 Thousand Discover Financial Services shares worth $32.1 Million. That's 0.03% of their equity portfolio (654th largest holding). The first Discover Financial Services trade was made in Q2 2013. Since then Ken Griffin bought shares 55 more times and sold shares on 55 occasions. The stake costed the investor $14.9 Million, netting the investor a gain of 116% so far.