Is MKS Instruments, Inc. overvalued or undervalued?

As of 24 October 2025, the valuation grade for MKS Instruments, Inc. has moved from attractive to fair, indicating a shift in its perceived value. The company appears fairly valued based on its current metrics. Key ratios include a P/E ratio of 19, an EV to EBITDA of 11.18, and a PEG ratio of 0.30, which suggests that the stock is reasonably priced relative to its growth potential.
In comparison to peers, MKS Instruments, Inc. has a lower P/E ratio than Woodward, Inc., which stands at 42.20, and is also more favorable than Graco, Inc. at 29.51. This positions MKS competitively within the industrial manufacturing sector. Notably, MKS has outperformed the S&P 500 over various periods, with a year-to-date return of 36.93% compared to the S&P 500's 15.47%, reinforcing the notion that the stock is performing well despite its current fair valuation.