Steven Cohen's position in MKS Instruments is currently worth $573M. That's 0.92% of their equity portfolio (11th largest holding). The investor owns 2.38% of the outstanding MKS Instruments stock. The first MKS Instruments trade was made in Q1 2019. Since then Steven Cohen bought shares twelve more times and sold shares on seven occasions. The stake costed the investor $267M, netting the investor a gain of 114% so far.