• Wondering if MKS at around US$293.77 is still offering value after a strong run, or if you might be turning up late to the story.
• The stock has posted returns of 10.7% over 7 days, 24.0% over 30 days, 74.5% year to date, 298.2% over 1 year and 255.7% over 3 years, with a 5 year return of 83.9%.
• These moves have kept MKS firmly on investors' radars, as sustained share price strength often raises questions about how the current price lines up with underlying fundamentals. With this context in mind, it becomes important to see how different valuation tools assess the stock at today's levels.
• On Simply Wall St, MKS currently has a valuation score of 1 out of 6, which means it screens as undervalued on 1 of 6 checks. Next comes a closer look at the main valuation methods investors tend to use and a final, more holistic way to think about what the stock might be worth.

MKS scores just 1/6 on our valuation checks. See what other red flags we found in the full valuation breakdown.

Approach 1: MKS Discounted Cash Flow (DCF) Analysis

A Discounted Cash Flow, or DCF, model estimates what a stock could be worth by projecting future cash flows and discounting them back to today using an appropriate rate. It is essentially asking what all of MKS's expected future Free Cash Flow is worth in today's dollars.

For MKS, the model used is a 2 Stage Free Cash Flow to Equity approach. The latest twelve month Free Cash Flow is about $520.4 million. Analysts provide Free Cash Flow estimates out to 2027, with Simply Wall St extending this path further using its own assumptions. Within these projections, Free Cash Flow for 2027 is set at $823.0 million, and the ten year path includes figures such as $344.2 million in 2026 and $1,524.1 million in 2035, all discounted back to today.

Putting this full stream of projected cash flows together, the DCF model arrives at an estimated intrinsic value of about $176.33 per share. Compared with the recent share price around $293.77, this implies the stock screens as 66.6% overvalued on this method alone.

Result: OVERVALUED

Our Discounted Cash Flow (DCF) analysis suggests MKS may be overvalued by 66.6%. Discover 44 high quality undervalued stocks or create your own screener to find better value opportunities.

Approach 2: MKS Price vs Earnings

For profitable companies, the P/E ratio is a straightforward way to see how much you are paying for each dollar of earnings. Higher expected growth and lower perceived risk usually support a higher P/E, while slower growth or higher risk tend to justify a lower multiple.

MKS currently trades on a P/E of 67.04x. That sits above the Semiconductor industry average of 53.66x and below the peer average of 79.09x, so on simple comparisons the stock is priced toward the higher end of the sector, but not at the top of its peer group.

Simply Wall St also calculates a proprietary “Fair Ratio” of 43.79x for MKS. This is designed to be more tailored than a basic peer or industry comparison, because it blends in factors such as the company’s earnings growth profile, its industry, profit margins, market cap and risk characteristics. On this view, the current P/E of 67.04x sits well above the Fair Ratio of 43.79x, which suggests the shares may be expensive on this metric.

Result: OVERVALUED

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Upgrade Your Decision Making: Choose your MKS Narrative

Earlier it was mentioned that there is an even better way to understand valuation. Narratives on Simply Wall St give you a clear story behind the numbers by asking you to spell out what you think happens to MKS’s future revenue, earnings and margins, linking that story to a forecast and then to a Fair Value that can be compared directly with today’s price on the Community page. This updates automatically as fresh news or earnings arrive, so you can see, for example, why one investor’s more cautious Narrative might anchor around a Fair Value near US$212.72 while another, more optimistic view might sit closer to US$320, and then decide for yourself which story you agree with and how big the gap is between your Fair Value and the current share price.

For MKS, however, we’ll make it really easy for you with previews of two leading MKS Narratives:

Start by using these as bookends, then decide where your own view sits in between them or outside the range entirely.

Fair value in this bullish narrative: US$320.00 per share

Implied gap to that fair value at the last close of US$293.77: around 8.2% below the narrative fair value

Revenue growth assumption used in this narrative: 13.54% a year

• Expectations that AI, advanced packaging and digital transformation keep demand for MKS chemistry and services strong, with recurring revenue playing a bigger role over time.
• View that integrated products and past acquisitions raise switching costs and broaden the customer base across semiconductors, electronics and renewables related manufacturing.
• Assumption that margins and returns can benefit from a higher mix of chemistry and services, alongside refinancing benefits, supporting the higher fair value used in this narrative.

Fair value in this bearish narrative: US$212.72 per share

Implied gap to that fair value at the last close of US$293.77: around 38.1% above the narrative fair value

Revenue growth assumption used in this narrative: 8.99% a year

• Focus on tariff risk, geopolitical tension and supply chain pressure that could weigh on margins and future cash flows, even if demand remains solid.
• Concern that customer localization, in-house development and integration challenges after acquisitions could cap long-term growth and returns.
• View that, at this fair value, investors would be assuming a lower future P/E multiple and building in the possibility that current market expectations are already demanding.

These two Narratives give you a clear, quantified range of possible outcomes, from a higher fair value anchored in stronger recurring revenue and execution, through to a lower fair value that leans on trade, integration and cycle risks.

If you want to see how the wider community is weighing those trade offs and where your own view might sit along that spectrum, See what the community is saying about MKS.

Do you think there's more to the story for MKS? Head over to our Community to see what others are saying!

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.