MKS Instruments Inc (MKSI) fair value: what the stock is really worth
As of Nov 5, 2026: fair value (intrinsic value) of MKS Instruments Inc stock $195, price $177, upside +10.0%, quality 52 out of 100. Rating: fairly valued. Calculated from audited financials with 24 of our 26 valuation models and 37 quality factors, updated daily.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year. As of Nov 6, 2026.
How to read this chart
60‑month range $58.32 – $444.80 · fair‑value band $95.73 – $298.26 · the $176.82 price screens below the $194.50 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). 5 fiscal years are left out: there the valuation rested on only a fraction of the usual models. As of Nov 6, 2026.
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MKS Inc. provides foundational technology solutions to semiconductor manufacturing, electronics and packaging, and specialty industrial applications in the United States, China, South Korea, Japan, Taiwan, Singapore, and internationally.
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The company operates through Vacuum Solutions Division (VSD), Photonics Solutions Division (PSD), and Material Solutions Division (MSD) segments.
Its VSD segment provides foundational technology solutions, including pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, electronic control technology, reactive gas generation and delivery, power generation and delivery, and fiber optic temperature and position sensing.
The PSD segment offers range of solutions, which include lasers, photonics, optics, precision motion control, and vibration control.
Its MSD segment develops, process, and manufactures technologies comprising advanced surface modification, electroless and electrolytic plating, and surface finishing for chemistry, equipment, and services markets, as well as high-technology applications.
In addition, the company sells its products and services through direct sales, network of independent distributors, and sales representatives, as well as websites, including product catalogs. MKS Inc. was formerly known as MKS Instruments, Inc. and changed its name to MKS Inc. in May 2025.
The company was incorporated in 1961 and is based in Andover, Massachusetts.
Stock analysis
MKS Instruments Inc (MKSI) currently trades at $176.82, while our model-based Fair Value estimate is $194.50, so the stock looks roughly fairly valued today (gap 9.1%).
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Valuation
Bull case: the Multiples group reads highest at a median of $122.16 per share, and 2 of the 24 models we run sit above the $176.82 price.
Bear case: the Earnings-Based group reads lowest at $50.65, and 22 of the 24 models stay below the price. Data coverage for this calculation is high.
Scenario range: $95.73 (bear) to $298.26 (bull), the price of $176.82 sits inside it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 52/100 (solid quality), in the Technology sector.
Healthy Growth: Revenue growth appears healthy and is supported by profitability and cash-flow quality.
MKS Instruments Inc reported revenue of $3.9B in FY2025 versus $3.0B in FY2021, a compound +7.4%/yr. Reported net income was $295M in FY2025, compounding −14.5%/yr from FY2021.
Key figures
Market cap $12.9B Large · P/E ratio 20.9 · P/S ratio 1.57 · EPS (TTM) $8.45 · Dividend yield 0.5% · Net margin 7.5% · Return on equity 15.9% · Return on assets (EBIT) 3.2%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 58 out of 100 (low confidence).
What moves the price
The last reported earnings sit well below what analysts expect (earnings in transition, for example after write-downs or an earnings dip); whether the stock is cheap or expensive hinges on the expected recovery actually arriving. Read the fair value with that caveat.
The share trades about 60% below its 52-week high and 28% above its 52-week low, currently below its 200-day average.
For context, the median of 10 Technology peers we cover trades at −45% fair-value upside, at 10%, MKSI screens cheaper than that median.
Fair Value models
Bear$95.73Fair Value $194.50Bull$298.26
Price $176.82 · Upside +10.0%
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above starts from their evidence-weighted blend, not from a single model. In cyclical trough or peak years, after dilution or a stock split it is adjusted afterwards, so it can sit above or below the models. Based on fiscal year 2025 figures (about 10 months old). Earnings retained since then ($6.38 per share) are deliberately not added.Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target. If a model's bull case is above four times its base value, the table shows that limit with a > sign (like the overall Bull above): beyond it no assumption holds.Coverage ⓘCoverage = how well-backed THIS model's estimate is for this stock (0–100): how complete and reliable its input data are, and how well the model fits the company. The final Fair Value is an evidence-weighted blend, so better-evidenced models count more. Green ≥70, amber 50–69, grey below 50.
In the last 6 months, 13 officers or directors sold shares worth $25.0M and none bought.
SaleElizabeth MoraDirector4× since Dec 2, 2025: 1,200 shares, avg. $241.81$290,169Sep 1, 202610b5-1 plan
SaleJohn Tseng-Chung LeePresident & CEO, Director3× since Feb 20, 2026: 50,000 shares, avg. $277.56$13.9MAug 14, 2026
SaleJohn Edward WilliamsEVP & GM, PSD2× since Feb 20, 2026: 2,500 shares, avg. $262.24$655,508Aug 3, 2026
SaleJames Alan SchreinerEVP & COO3× since Feb 24, 2026: 8,381 shares, avg. $298.74$2.5MJun 12, 2026
SaleMichelle M McCarthySVP & Chief Accounting Officer2× since Feb 20, 2026: 3,900 shares, avg. $290.71$1.1MJun 5, 2026
SaleDavid Philip HenryEVP, Global Str Mktg & GM, MSD3× since Feb 20, 2026: 10,500 shares, avg. $308.19$3.2MJun 1, 2026
SaleGerald G ColellaDirector2× since Feb 20, 2026: 40,000 shares, avg. $293.42$11.7MMay 27, 2026
SaleJoseph B DonahueDirector2,100 shares at $327.95$688,695May 27, 2026
SaleRamakumar MayampurathEVP & CFO8,810 shares at $315.48$2.8MMay 22, 202610b5-1 plan
SalePeter Cannone IIIDirector2× since Feb 20, 2026: 2,600 shares, avg. $281.60$732,165May 18, 2026
Plus 3 more entries from the last 12 months.
Plus 8 other filings such as grants, option exercises or tax withholding. They are not market purchases or sales.
Sales are often planned (taxes, diversification, 10b5-1 plans). Purchases with their own money are seen as the stronger sign. For information only: not part of the quality score or Fair Value.
Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card.93/100
Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Revenue growth 1 year
+9.6%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+3.5%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+11.0%
Start year 2020 (pandemic). Over 10 years: +17.1% a year
Revenue growth 27 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+13.2%
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What shareholders gained per year (last 5 years) ⓘWhat the business itself delivers per year: earnings growth per share plus the dividend yield. This is what you get IF the market keeps valuing the stock the same way: it contains no assumption about the market changing its mind. Computed per share, so buybacks count and a merger does not pass as growth. For a company that pays no dividend it is pure earnings growth per share. Period: earnings growth per share as CAGR over the last 5 reported fiscal years (annual statements), plus the current dividend yield. The start value is the median of the three years around the start, so a single crisis year (a pandemic or a write-down) does not distort the rate. Basis: adjusted.
+3.9%
Earnings growth per share plus dividend.
Earnings per share, growth per year+3.4%
Dividend (yield on the price)0.5%
Pace: 5 vs 10 years ⓘTwo data points, not a trend model: earnings growth per share over the last 5 fiscal years against the last 10. Labelled "steady" when both rates are within 3 percentage points of each other, otherwise picking up or flattening. Shown only when ten years of history exist.−7.2% vs 7.3%, slowing
Profit margin 2020 to 2025 ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.20% → 14%
Pace: the 5-year rate starts in 2020 (pandemic)
Growth Forecast
A lot of optimism in the price
The price assumes more growth than the company has delivered so far and more than analysts expect.
What the price assumes ⓘThis turns our valuation around: instead of asking what the share is worth, it asks what growth the current price requires. It uses the cash the company keeps after all spending (free cash flow), the same discount rate as our models, five years of growth, then slowing evenly to 2 % a year by year ten. Compared with the analysts' sales forecasts extended to the same five years (at least three analysts, for context only, it does not enter the Fair Value): within 3 percentage points counts as "in line" (amber), below that little optimism (green), above that a lot of optimism (red).
+23.8%
Yearly growth needed for the next five years to justify today's price.
What forecasts expect ⓘAnalysts publish sales forecasts for the next two fiscal years. For the years after that, growth slows evenly to 2 % a year by year ten (2 % is the long-run rate our models use). Projected years are marked as such.
+19.3%
Yearly sales growth analysts expect, extended to five years.
After inflation (USA: IMF forecast 2.4% a year to 2030, 3.1% from 2016 to 2025) that is about +20.9% a year for the price and +16.6% for the forecasts.
News mood ⓘNews mood, the average tone of recent news (96 articles), rated against how stocks are usually covered. 🚀 Hype = unusually upbeat · 🙂 Positive = above average · 😐 Neutral = typical · 🙁 Negative = below average · 😨 Very negative = unusually downbeat. It reflects the tone of coverage, not our valuation.Hype
Recent news coverage is unusually upbeat, far more positive than stocks are typically covered.
AI conclusion: Deep entrenchment with semiconductor OEMs via critical components and recurring chemistry forms the core strength, while equipment sales tied to capital spending cycles and high debt represent the primary weakness.
Main risk: Competitors such as Advanced Energy Industries in RF power and plasma delivery or Chinese OEMs could capture share or force price reductions in semiconductor components and subsystems.
Bull case: By deepening design wins with leading equipment makers and expanding its recurring chemistry revenue in AI-driven advanced packaging, MKS could strengthen its position against rivals and offset any customer concentration effects.
Bear case: If rivals gain ground in power or photonics subsystems or if trade rules further limit access to key markets, MKS could see sustained pressure on volumes and margins in its core semiconductor offerings.
MKS supplies critical components and chemistry into most wafer fab equipment and advanced packaging lines, giving it deep entrenchment with major semiconductor OEMs. AI server builds are already lifting its materials segment, yet equipment sales remain tied to capital spending cycles. Our models see the stock as overvalued. Will the recurring chemistry revenue and high switching costs deliver more durable growth than the cyclical equipment side?
Price, fair value, quality and upside side by side.
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Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Scientific & Technical Instruments · 161 stocks
P/B4.73× · book value is mostly goodwill ⓘGoodwill and other intangible assets are larger than the equity. The book value mainly reflects prices paid for past acquisitions, so we do not rank this P/B against the peer group.
P/S (12 months)2.96× · Cheaper than median
Price / free cash flow (fiscal year)25.9× · Cheaper than median
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Is MKS Instruments Inc (MKSI) overvalued or undervalued?
As of Nov 6, 2026, our model estimates a fair value of $194.50 versus a price of $176.82, about +10% upside (fairly valued).
What is the fair value of MKSI?
Our model-based fair value for MKS Instruments Inc is $194.50 (as of Nov 6, 2026), built from audited fundamentals. The current price: $176.82.
What is the quality score of MKSI?
MKS Instruments Inc has a Quality Score of 52/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for MKS Instruments Inc (MKSI)?
Our model-based price target is the fair value of $194.50 (as of Nov 6, 2026) from 24 valuation models. Cautious scenario $95.73, optimistic scenario $298.26. It is a calculation from audited fundamentals, not an analyst target.
What is the MKS Instruments Inc stock forecast for 2026?
Our models put fair value at $194.50, about +10% upside versus a price of $176.82 (fairly valued). Cautious scenario $95.73, optimistic scenario $298.26. The calculation is refreshed regularly with new filings.
What is the revenue of MKS Instruments Inc (MKSI)?
MKS Instruments Inc reported trailing-twelve-month revenue of about $4.3B (latest available figure, as of Nov 6, 2026).
Does MKS Instruments Inc pay a dividend?
MKS Instruments Inc currently shows a dividend yield of 0.53% relative to its recent price (as of Nov 6, 2026).
What growth is priced into MKS Instruments Inc (MKSI)?
For today's price to be fair in a discounted-cash-flow model, MKS Instruments Inc would have to grow free cash flow by +23.8 % per year for five years (discount rate 11.5 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +11.0 % per year. As of Nov 6, 2026.
What discount rate (WACC) does the fair value of MKSI use?
Our models discount MKS Instruments Inc at 11.5 %: a base by market capitalisation (large), damped by beta 2.14, country premium for USA. The same rate applies in all 26 models.
What is a reverse DCF?
A reverse DCF turns the usual calculation around. Instead of deriving a value from assumptions, it takes today's price as given and asks: what free-cash-flow growth would a company have to deliver for exactly this price to be fair? The result is not a forecast but the expectation already priced in. For MKS Instruments Inc that is +23.8 % per year a year over ten years, using the same discount rate (11.5 %) and the same formula as our fair value.
How much growth has MKS Instruments Inc (MKSI) delivered so far?
Over the past 5 years revenue at MKS Instruments Inc grew +11.0 % a year. The price currently implies +23.8 % per year free-cash-flow growth a year. Comparing the two shows how much confidence is in the price: if it demands more than has been delivered, the business has to accelerate for the maths to work.
How fast is the sector of MKS Instruments Inc (MKSI) growing?
The median revenue growth in the sector is +11.4 % a year. That is the yardstick for the growth priced into MKS Instruments Inc (+23.8 % per year a year): it shows whether the expectation is within the usual range or beyond it.
What is the free cash flow yield of MKS Instruments Inc (MKSI)?
The free-cash-flow yield on the price is 3.87 %: that much free cash flow MKS Instruments Inc produces per unit of market value. When it exceeds the discount rate of our models (11.5 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of MKS Instruments Inc (MKSI)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For MKS Instruments Inc it is $194.50 per share (as of Nov 6, 2026), against a price of $176.82. It is the blended result of 24 valuation models (cash flow, earnings, asset, dividend).
Is MKS Instruments Inc stock overvalued or undervalued in 2026?
As of Nov 6, 2026, MKSI trades below its calculated fair value: price $176.82, fair value $194.50, a gap of about +10% (fairly valued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of MKSI?
No. The price is what the market pays today ($176.82); the fair value is what the company's own numbers justify ($194.50). For MKS Instruments Inc the two are $17.68 per share apart. That gap is exactly why we show both numbers side by side.
How much is MKS Instruments Inc worth?
The market values MKS Instruments Inc at about $12.9B (market capitalisation, as of Nov 6, 2026). Per share that is $176.82; our models calculate a fair value of $194.50 per share.
What do the bullish and bearish scenarios say about MKSI?
Our models span a range for MKS Instruments Inc: cautious scenario $95.73, base $194.50, optimistic $298.26 per share (as of Nov 6, 2026, price $176.82). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of MKSI?
MKS Instruments Inc trades at a price-to-earnings ratio of 20.9 (as of Nov 6, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of $194.50 is built from several models across several years. Excluding one-off items of fiscal year 2025 it is 23.4 (reported for FY2025: 40.6). Median P/E at fiscal year-end, 9 fiscal years (2016 to 2025), reported earnings, 7 of the years ex one-offs: 19.2. Other multiples: PEG 1.3, P/B 4.7, P/S 3.0, EV/EBITDA 15.5.
What is the PEG ratio of MKSI?
The PEG ratio of MKS Instruments Inc is 1.32 (P/E divided by earnings growth, as of Nov 6, 2026). That is above 1, so the growth is already paid for in the price.
How solid is the balance sheet of MKS Instruments Inc (MKSI)?
Balance-sheet figures for MKS Instruments Inc (as of Nov 6, 2026): return on equity 15.9%, debt of 1.53 per unit of equity. They feed the Quality Score of 52/100, which measures business quality independently of the share price.
How far is MKSI from its 52-week high?
MKS Instruments Inc trades at $176.82, about 60% below its 52-week high of $444.80 and 28% above the low of $138.04 (as of Nov 5, 2026). Distance from the high says nothing about value: that is what the fair value of $194.50 is for.
Which stocks are comparable to MKS Instruments Inc?
From the same area (Technology) we also value Keysight Technologies, Inc, Garmin Ltd, Coherent Corp, Teledyne Technologies Incorporated, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is MKS Instruments Inc stock attractive at the current price?
The data as of Nov 6, 2026: price $176.82, calculated fair value $194.50 (+10%), Quality Score 52/100, from 24 models. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
How is the fair value of MKSI calculated?
We run MKS Instruments Inc through 24 models from four families: discounted cash flow, earnings models, asset and balance-sheet models, and dividend models. Every model gets the same audited fundamentals; the result is the weighted average of $194.50, with the spread shown as a cautious and an optimistic scenario.
Is it still worth investing in stocks now?
The global stock market currently sits 15.5% above its aggregate fair value. MKS Instruments Inc currently trades 9% below its own fair value, and the market average says nothing about that. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of MKS Instruments Inc (MKSI)?
The closing price on Nov 5, 2026 was $176.82. Our model-based fair value is $194.50, about +10% upside (fairly valued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with MKS Instruments Inc right now?
The model range is unusually wide ($95.73 to $298.26). The outcome hinges heavily on assumptions, so read the point estimate with caution. The price sits close to our fair value, market and models broadly agree here, little valuation tension.
Where does the earnings growth of MKS Instruments Inc (MKSI) come from?
Earnings per share at MKS Instruments Inc grew +5.6 % a year from 2014 to 2025. Broken into its drivers: revenue per share +12.6 %, EBIT margin −1.0 %, tax rate +2.3 %, residual (interest, one-offs) −7.4 %. The four rates multiply to the earnings growth rate, they do not add up. Start and end are three-year averages so a single exceptional year does not distort the result.
Key figures of MKS Instruments Inc
How large is the market capitalisation of MKS Instruments Inc (MKSI)?
The market capitalisation of MKS Instruments Inc is $12.9B. The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What is the P/S ratio of MKS Instruments Inc (MKSI)?
The price-to-sales ratio of MKS Instruments Inc is 1.57 (P/E × margin). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What are the earnings per share of MKS Instruments Inc (MKSI)?
Earnings per share at MKS Instruments Inc are $8.45 (price ÷ EPS = P/E 20.9). Earnings per share over the last twelve months: total profit spread across every single share.
What is the dividend yield of MKS Instruments Inc (MKSI)?
The dividend yield of MKS Instruments Inc is 0.5% (payout 6.4%, on adjusted earnings, reported 11.1%). Yearly dividend relative to the share price. 3% pays 3 per 100 invested. Below: how much of profit is used for it.
What is the net margin of MKS Instruments Inc (MKSI)?
The net margin of MKS Instruments Inc is 7.5% (fiscal year 2025). How much of every unit of revenue ends up as profit. 10% means 10 cents of profit per dollar of sales.
What is the return on equity of MKS Instruments Inc (MKSI)?
The return on equity (ROE) of MKS Instruments Inc is 15.9% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of MKS Instruments Inc (MKSI)?
On an EBIT basis the return on assets of MKS Instruments Inc is 3.2% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of MKS Instruments Inc (MKSI)?
The operating margin of MKS Instruments Inc is 20.6% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at MKS Instruments Inc (MKSI)?
Revenue at MKS Instruments Inc is growing +28.3% versus a year earlier (3y avg +3.5%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How fast are earnings growing at MKS Instruments Inc (MKSI)?
Earnings per share at MKS Instruments Inc are growing +162% versus a year earlier. How much earnings per share grew versus a year earlier.
How much net debt does MKS Instruments Inc (MKSI) carry?
The net debt of MKS Instruments Inc is $4.0B (fiscal year 2025, ≈ 8.1 yrs of FCF). Debt minus cash on hand. The note shows how many years of free cash flow could in theory pay it off.
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Broad data
Nov 6, 2026