Is MKS Instruments, Inc. overvalued or undervalued?

As of 17 October 2025, the valuation grade for MKS Instruments, Inc. has moved from very attractive to attractive, indicating a shift in perceived value. The company appears to be fairly valued based on its current metrics, with a P/E ratio of 19, an EV to EBITDA of 11.18, and a PEG ratio of 0.30. In comparison to peers, MKS Instruments has a lower P/E ratio than Woodward, Inc. at 42.20 and Graco, Inc. at 29.51, suggesting it may be more attractively priced within its industry.
Recent performance shows that MKS Instruments has outperformed the S&P 500 over multiple periods, with a year-to-date return of 30.78% compared to the S&P 500's 13.30%. This strong performance reinforces the notion that the stock is fairly valued, as it has delivered significant returns relative to the broader market.