Ken Griffin acquired 2.12 Million Natera shares worth $362 Million. That's 0.36% of their equity portfolio (44th largest holding). The investor owns 1.54% of the outstanding Natera stock. The first Natera trade was made in Q3 2015. Since then Ken Griffin bought shares 51 more times and sold shares on 29 occasions. The stake costed the investor $155 Million, netting the investor a gain of 134% so far.