Spirax Group plc (SPX) fair value: what the stock is really worth
As of Sep 23, 2026: fair value of Spirax Group plc £42.73, price £71.10, upside -39.9%, quality 65 out of 100. Calculated from audited financials with 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, dashed = 300-day average. As of Sep 23, 2026.
How to read this chart
60‑month range £52.13 – £156.65 · fair‑value band £27.47 – £58.12 · the £71.10 price screens above the £42.73 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 23, 2026.
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Spirax Group plc provides thermal energy and fluid technology solutions in Europe, the Middle East, Africa, the Asia Pacific, and the Americas. It operates through three segments: Steam Thermal Solutions, Electric Thermal Solutions, and Watson-Marlow Fluid Technology Solutions.
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Spirax Group plc provides thermal energy and fluid technology solutions in Europe, the Middle East, Africa, the Asia Pacific, and the Americas. It operates through three segments: Steam Thermal Solutions, Electric Thermal Solutions, and Watson-Marlow Fluid Technology Solutions. The company offers industrial and commercial steam systems, including condensate management, controls, and thermal energy management products and solutions for heating, curing, cooking, drying, cleaning, sterilizing, space heating, humidifying, vacuum packing, and producing hot water; electrical process heating and temperature management solutions, such as industrial heaters and systems, heat tracing, and various component technologies; and designs and manufactures peristaltic and niche pumps and associated fluid path technologies, including tubing, specialised filling systems and products for single use applications. The company serves food and beverage, pharmaceutical and biotechnology, oil and gas, chemical, power generation, healthcare, buildings, water and wastewater, semiconductor, transport, original equipment manufacturers machinery, and mining and precious metal processing industries. The company was formerly known as Spirax-Sarco Engineering plc and changed its name to Spirax Group PLC in June 2024. Spirax Group PLC was founded in 1888 and is headquartered in Cheltenham, the United Kingdom.
Stock analysis
Spirax Group plc (SPX) currently trades at £71.10, while our model-based Fair Value estimate is £42.73, implying the stock looks roughly 66.4% overvalued today.
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Valuation
Bull case: the DCF Models group reads highest at a median of £48.37 per share, and 0 of the 26 models we run sit above the £71.10 price.
Bear case: the Asset-Based group reads lowest at £11.10, and 26 of the 26 models stay below the price. Evidence for this calculation is high.
Scenario range: £27.47 (bear) to £58.12 (bull), the price of £71.10 sits above 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 65/100 (solid quality), in the Industrials sector.
Healthy Growth: Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Spirax Group plc reported revenue of £1.7B in FY2025 versus £1.3B in FY2021, a compound +6.1%/yr. Reported net income was £163M in FY2025, compounding −8.6%/yr from FY2021.
Key figures
Market cap 5.3B GBX · P/E ratio 32.2 · P/S ratio 3.09 · EPS (TTM) £2.21 · Dividend yield 2.4% · Net margin 9.6% · Return on equity 13.5% · Return on assets (EBIT) 12.5%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 50 out of 100 (low confidence).
What moves the price
The share trades about 9% below its 52-week high and 13% above its 52-week low, currently above its 200-day average.
For context, the median of 10 Industrials peers we cover trades at −49% fair-value upside, at −40%, SPX screens cheaper than that median.
Fair Value models
Bear £27.47Fair Value £42.73Bull £58.12
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above is their evidence-weighted blend, not the output of a single model. Based on fiscal year 2025 figures (about 9 months old). Earnings retained since then (£0.3731 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.Evidence ⓘEvidence = 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.
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.80/100
Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Revenue growth 1 year
+2.3%
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.
+1.9%
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.
+7.4%
Start year 2020 (pandemic). Over 10 years: +9.8% a year
Revenue growth 40 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.
+7.7%
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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.
+1.2%
Earnings growth per share plus dividend.
Earnings per share, growth per year−1.2%
Dividend (yield on the price)2.4%
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.−1% vs 5%, 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% → 18%
Start year 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).
+18.0%
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.
+4.6%
Yearly sales growth analysts expect, extended to five years.
After inflation (UK: IMF forecast 2.3% a year to 2030, 3.3% from 2016 to 2025) that is about +15.3% a year for the price and +2.3% for the forecasts.
News mood ⓘNews mood, the average tone of recent news (87 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.
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.Specialty Industrial Machinery · 832 stocks
Beats the industry median on 8/15 measures
A mixed picture versus its industry peers.
Valuation
Quality Score65 · Top 25%
Fair Value upside−40% · Below median
Profitability
Return on equity (TTM)13% · Top 25%
Return on assets7% · Top 25%
Net margin (TTM)10% · Above median
Operating margin (TTM)19% · Top 25%
Growth and dividend
Revenue growth5% · Above median
Dividend yield (TTM)2.4% · Above median
Balance sheet
Debt / equity0.57× · Highest 25%
Valuation Multiplesvs Specialty Industrial Machinery median · lower = cheaper
P/E (TTM)32.2× · Pricier than median
P/B5.69× · Priciest 25%
P/S (TTM)4.09× · Pricier than median
P/FCF32.9× · Priciest 25%
EV/EBITDA19.4× · Pricier than median
PEG1.46× · Cheaper than median
Strength profile in five axes (Snowflake)
This stockSector peers
VALUE (fair-value potential)0· sector 0
FUTURE (revenue growth)26· sector 22
PAST (return on equity)54· sector 28
HEALTH (low debt)72· sector 95
DIVIDEND (yield)48· sector 24
VALUE 0: the price sits above our fair-value range.
For bloggers, editors and developers: paste this into your site or blog (a “Custom HTML” block in WordPress), it shows the current fair value and links back here. Free, plain HTML, and welcome. Full data streams (CSV/JSON) at /developers.
Cite: Fair Value Calculator (2026). "Spirax Group plc Fair Value". https://www.fairvalue-calculator.com/stock/SPX
Frequently asked questions
Is Spirax Group plc (SPX) overvalued or undervalued?
As of Sep 23, 2026, our model estimates a fair value of £42.73 versus a price of £71.10, about −40% upside (overvalued).
What is the fair value of SPX?
Our model-based fair value for Spirax Group plc is £42.73 (as of Sep 23, 2026), built from audited fundamentals. The current price: £71.10.
What is the quality score of SPX?
Spirax Group plc has a Quality Score of 65/100. 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 Spirax Group plc (SPX)?
Our model-based price target is the fair value of £42.73 (as of Sep 23, 2026) from 26 valuation models. Cautious scenario £27.47, optimistic scenario £58.12. It is a calculation from audited fundamentals, not an analyst target.
What is the Spirax Group plc stock forecast for 2026?
Our models put fair value at £42.73, about −40% upside versus a price of £71.10 (overvalued). Cautious scenario £27.47, optimistic scenario £58.12. The calculation is refreshed regularly with new filings.
What is the revenue of Spirax Group plc (SPX)?
Spirax Group plc reported trailing-twelve-month revenue of about £1.7B (latest available figure, as of Sep 23, 2026).
Does Spirax Group plc pay a dividend?
Spirax Group plc currently shows a dividend yield of about 2.39% relative to its recent price (as of Sep 23, 2026).
What growth is priced into Spirax Group plc (SPX)?
For today's price to be fair in a discounted-cash-flow model, Spirax Group plc would have to grow free cash flow by +18.0 % per year for five years (discount rate 10.7 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +7.4 % per year. As of Sep 23, 2026.
What discount rate (WACC) does the fair value of SPX use?
Our models discount Spirax Group plc at 10.7 %: a base by market capitalisation (mid), damped by beta 1.15, country premium for United Kingdom. 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 Spirax Group plc that is +18.0 % per year a year over ten years, using the same discount rate (10.7 %) and the same formula as our fair value.
How much growth has Spirax Group plc (SPX) delivered so far?
Over the past 5 years revenue at Spirax Group plc grew +7.4 % a year. The price currently implies +18.0 % 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 Spirax Group plc (SPX) growing?
The median revenue growth in the sector is +4.7 % a year. That is the yardstick for the growth priced into Spirax Group plc (+18.0 % 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 Spirax Group plc (SPX)?
The free-cash-flow yield on the price is 4.03 %: that much free cash flow Spirax Group plc produces per unit of market value. When it exceeds the discount rate of our models (10.7 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of Spirax Group plc (SPX)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Spirax Group plc it is £42.73 per share (as of Sep 23, 2026), against a price of £71.10. It is the blended result of 26 valuation models (cash flow, earnings, asset, dividend).
Is Spirax Group plc stock overvalued or undervalued in 2026?
As of Sep 23, 2026, SPX trades above its calculated fair value: price £71.10, fair value £42.73, a gap of about −40% (overvalued). 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 SPX?
No. The price is what the market pays today (£71.10); the fair value is what the company's own numbers justify (£42.73). For Spirax Group plc the two are £28.37 per share apart. That gap is exactly why we show both numbers side by side.
How much is Spirax Group plc worth?
The market values Spirax Group plc at about 5.3B GBX (market capitalisation, as of Sep 23, 2026). Per share that is £71.10; our models calculate a fair value of £42.73 per share.
What do the bullish and bearish scenarios say about SPX?
Our models span a range for Spirax Group plc: cautious scenario £27.47, base £42.73, optimistic £58.12 per share (as of Sep 23, 2026, price £71.10). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of SPX?
Spirax Group plc trades at a price-to-earnings ratio of 32.2 (as of Sep 23, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of £42.73 is built from several models across several years. Other multiples: PEG 1.5, P/B 5.7, P/S 4.1, EV/EBITDA 19.4.
What is the PEG ratio of SPX?
The PEG ratio of Spirax Group plc is 1.46 (P/E divided by earnings growth, as of Sep 23, 2026). That is above 1, so the growth is already paid for in the price.
How solid is the balance sheet of Spirax Group plc (SPX)?
Balance-sheet figures for Spirax Group plc (as of Sep 23, 2026): return on equity 13.5%, debt of 0.57 per unit of equity. They feed the Quality Score of 65/100, which measures business quality independently of the share price.
How far is SPX from its 52-week high?
Spirax Group plc trades at £71.10, about 9% below its 52-week high of £78.31 and 13% above the low of £63.00 (as of Sep 23, 2026). Distance from the high says nothing about value: that is what the fair value of £42.73 is for.
Which stocks are comparable to Spirax Group plc?
From the same area (Industrials) we also value GE Vernova Inc, SIE, Eaton Corporation, Parker-Hannifin Corporation, 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 Spirax Group plc stock attractive at the current price?
The data as of Sep 23, 2026: price £71.10, calculated fair value £42.73 (−40%), Quality Score 65/100, from 26 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 SPX calculated?
We run Spirax Group plc through 26 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 £42.73, 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 14.1 % above its aggregate fair value. Spirax Group plc itself currently trades above fair value. 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 Spirax Group plc (SPX)?
The closing price on Sep 23, 2026 was £71.10. Our model-based fair value is £42.73, about −40% upside (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Spirax Group plc right now?
The price sits above even our optimistic bull case (£58.12). The favourable scenario is already priced in. Solid but not exceptional quality (65/100) and above fair value, neither a clear bargain nor a standout compounder. A fairly wide model range (£27.47 to £58.12) leaves room in how you read the outcome.
Where does the earnings growth of Spirax Group plc (SPX) come from?
Earnings per share at Spirax Group plc grew +6.0 % a year from 2014 to 2025. Broken into its drivers: revenue per share +10.2 %, EBIT margin −2.2 %, tax rate +0.6 %, residual (interest, one-offs) −2.2 %. 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 Spirax Group plc
How large is the market capitalisation of Spirax Group plc (SPX)?
The market capitalisation of Spirax Group plc is 5.3B GBX. 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 Spirax Group plc (SPX)?
The price-to-sales ratio of Spirax Group plc is 3.09 (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 Spirax Group plc (SPX)?
Earnings per share at Spirax Group plc are £2.21 (price ÷ EPS = P/E 32.2). Earnings per share over the last twelve months: total profit spread across every single share.
What is the dividend yield of Spirax Group plc (SPX)?
The dividend yield of Spirax Group plc is 2.4% (payout 76.9%). 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 Spirax Group plc (SPX)?
The net margin of Spirax Group plc is 9.6% (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 Spirax Group plc (SPX)?
The return on equity (ROE) of Spirax Group plc is 13.5% (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 Spirax Group plc (SPX)?
On an EBIT basis the return on assets of Spirax Group plc is 12.5% (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 Spirax Group plc (SPX)?
The operating margin of Spirax Group plc is 18.5% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Spirax Group plc (SPX)?
Revenue at Spirax Group plc is growing +5.1% versus a year earlier (3y avg +1.9%). 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 Spirax Group plc (SPX)?
Earnings per share at Spirax Group plc are growing +0.8% versus a year earlier. How much earnings per share grew versus a year earlier.
How much net debt does Spirax Group plc (SPX) carry?
The net debt of Spirax Group plc is 655M GBX (fiscal year 2025, ≈ 3.1 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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