Ken Griffin acquired 4.55 Million JPMorgan Chase shares worth $845 Million. That's 0.87% of their equity portfolio (8th largest holding). The first JPMorgan Chase 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 $505 Million, netting the investor a gain of 67% so far.