Ken Griffin acquired 55.8 Thousand MKS Instruments shares worth $6.72 Million. That's 0.01% of their equity portfolio (1342nd largest holding). The first MKS Instruments trade was made in Q2 2013. Since then Ken Griffin bought shares 50 more times and sold shares on 48 occasions. The stake costed the investor $6.49 Million, netting the investor a gain of 3.5% so far.