The current institutional shareholding score of MKS Instruments Inc is 10.00, ranking 1 out of 180 in the Machinery, Tools, Heavy Vehicles, Trains & Ships industry. The latest institutional shareholding proportion is 116.29%, representing a quarter-over-quarter increase of 7.67%. The largest institutional shareholder is Steven Cohen, holding a total of 1.13M shares, representing 2.39% of shares outstanding, with 0.25% increase in holdings.