Ken Griffin acquired 77.2 Thousand Stryker shares worth $30.5 Million. That's 0.03% of their equity portfolio (680th largest holding). The first Stryker trade was made in Q2 2013. Since then Ken Griffin bought shares 56 more times and sold shares on 55 occasions. The stake costed the investor $17.4 Million, netting the investor a gain of 75% so far.