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SDI Group (SDIIF) fair value: what the stock is really worth

As of Sep 25, 2026: fair value of SDI Group $1.59, price $1.20, upside +32.5%, quality 60 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.

  1. Fair value above price? Yes
  2. Good quality? Yes
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Technology · US · ISIN GB00B3FBWW43

SG SDI Group logo Broad data Sep 24, 2026

SDI Group

SDIIF · US

UndervaluedThe stock appears undervalued with acceptable quality.

✓Fair value $1.59 · Undervalued (+32.5%)
✓Quality 60/100
✓Healthy Growth (revenue 5y +22.0 %/yr)
!Thin margins · 6.6% net margin (TTM)
✓Low debt · generates free cash flow
!Moderate moat 45/100
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What runs behind every stock

26 valuation models 8 families, DCF to NCAV 37 quality factors margins, balance sheet, cashflow, debt 6 AI factors moat, what no ratio measures 2,000+ data points verified, per stock, median

69 individual criteria per stock, every one traceable See the method →

Price vs Fair Value

$2.77 $0.6320 Fair Value $1.59 May 2021 Sep 2026

White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 24, 2026.

How to read this chart

60‑month range $0.6320 – $2.77 · fair‑value band $0.9300 – $2.07 · the $1.20 price screens below the $1.59 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 24, 2026.

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Company profile

SDI Group plc designs and manufactures scientific and technology products based on digital imaging and sensing and control applications worldwide. The company offers sensitive camera for life science and industrial applications under the Atik Camera brand; and camera for astronomy field under the Quantum Scientific Imaging brand.

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SDI Group plc designs and manufactures scientific and technology products based on digital imaging and sensing and control applications worldwide. The company offers sensitive camera for life science and industrial applications under the Atik Camera brand; and camera for astronomy field under the Quantum Scientific Imaging brand. It also provides chiller, cooler, and heat exchanger; off-the-shelf and custom-made, re-usable and single use electrochemical sensors under the Sentek brand; system and software for automated gel-based DNA and protein fluorescence/chemiluminescence imaging under the G:BOX and NuGenius brands; automated and manual system for microbiological testing in various applications; ProtoCOL 3, a system that is used for vaccine and antibiotic development in pharmaceutical companies; and AutoCOL, an automated colony counter, as well as supplies chemical dosing and control system for manufacturing industries. In addition, the company offers clean air solution, fume cupboard, biological safety, laminar flow, and cleanroom installations; temperature sensors; sterilisers, decontamination, and thermal processing equipment; environmental rooms and chambers, endoscope storage cabinets, laboratory ovens, incubators, and drying cabinets; Astles Control Systems, a chemical dosing and control systems and oven, incubator, and drying cabinet. Further, it designs, manufactures, and calibration of pressure, vacuum, and gas flow measurement instrument; and flowmeter, flow alarms, flow indicators, flow switches, calibration cylinders, and sight glasses; custom physical deposition systems; anti-static products; and precision micropattern products, as well as water purification product and vacuum ovens under the Cyclon Water Still and Gallenkamp vacuum ovens brands. The company was formerly known as Scientific Digital Imaging plc and changed its name to SDI Group plc in November 2019. The company was incorporated in 2007 and is based in Cambridge, the United Kingdom.

Stock analysis

SDI Group (SDIIF) currently trades at $1.20, while our model-based Fair Value estimate is $1.59, implying the stock looks roughly 24.5% undervalued today.

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Valuation

Bull case: the DCF Models group reads highest at a median of $1.84 per share, and 15 of the 24 models we run sit above the $1.20 price.

Bear case: the Economic Profit group reads lowest at $0.3800, and 9 of the 24 models stay below the price. Evidence for this calculation is high.

Scenario range: $0.9300 (bear) to $2.07 (bull), the price of $1.20 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 60/100 (solid quality), in the Technology sector.

Healthy Growth: Revenue growth appears healthy and is supported by profitability and cash-flow quality.

SDI Group reported revenue of £66.2M in FY2025 versus £35.1M in FY2021, a compound +17.2%/yr. Reported net income was £4.0M in FY2025, compounding −4.1%/yr from FY2021.

Key figures

Market cap $127M · P/E ratio 20.0 · P/S ratio 1.20 · EPS (TTM) $0.0600 · Net margin 6.0% · Return on equity 9.4% · Return on assets (EBIT) 10.3% · Operating margin 9.5%.

Competitive moat

Our AI-assisted moat analysis scores the competitive advantage at 48 out of 100 (low confidence).

What moves the price

The share trades about 7% below its 52-week high and 14% above its 52-week low, currently above its 200-day average.

For context, the median of 10 Technology peers we cover trades at −37% fair-value upside, at 33%, SDIIF screens cheaper than that median.

Fair Value models

Bear $0.9300 Fair Value $1.59 Bull $2.07
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 12 months old). Earnings retained since then ($0.0600 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. 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.
Highest evidence
FCF DCF $1.04 $1.63 $3.14 77
Growth DCF $0.9700 $1.72 $2.93 76
EPV $0.3200 $0.3800 $0.4300 74
All 24 models by family
DCF Models
FCF DCF $1.04 $1.63 $3.14 77
Owner Earnings $0.8700 $1.88 $3.65 72
5Y Revenue Exit $0.7800 $1.48 $2.81 69
5Y EBITDA Exit $1.41 $2.84 $5.44 71
5Y P/E Exit $0.9000 $1.91 $3.17 68
10Y Revenue Exit $0.8300 $1.64 $2.54 65
10Y EBITDA Exit $1.24 $2.66 $5.23 64
10Y P/E Exit $0.9300 $1.84 $3.35 61
Earnings-Based
Graham-Dodd $0.3400 $2.39 $3.36 63
Lynch FV $0.7100 $1.02 $1.32 61
PEG = 1.0 $0.7100 $1.02 $1.32 57
EPV $0.3200 $0.3800 $0.4300 74
Multiples
P/E Multiple $1.06 $1.41 $1.77 63
P/S Multiple $0.6400 $0.8600 $1.07 58
P/B Multiple $0.6400 $0.8600 $1.07 55
EV/EBIT $1.40 $1.93 $2.46 66
EV/EBITDA $1.72 $2.36 $2.99 67
EV/Revenue $0.6200 $0.9700 $1.31 53
Asset-Based
NCAV (Graham) $0.3100 $0.4200 $0.6300 54
Growth DCF
Growth DCF $0.9700 $1.72 $2.93 76
Rev-Margin DCF $0.7800 $1.58 $2.77 69
Economic Profit
Residual Income $0.4700 $0.4800 $0.5300 71
ROIC Compounder $0.3200 $0.3800 $0.4300 72
Growth Earnings
Growth-Adj P/E $1.11 $1.58 $2.06 67

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Quality Score breakdown

Overall quality 60/100

Of which business quality 61 · Market factors (momentum, volatility) 61

Profitability 50
Margins and returns on capital today
Quality Growth 44
Are margins and returns improving?
Cashflow 71
Earnings quality: real cash, not paper profit
Fin. Strength 61
Balance sheet, leverage, solvency risk
Investment 65
Disciplined investing over empire-building
Low Volatility 27
Calm price path (market factor)
Momentum 67
Price trend over the last 3–12 months (market factor)
52W Momentum 89
Distance to the 52-week high (market factor)
Net Issuance 75
Share count: buybacks or dilution?

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Revenue & earnings trend

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. 90/100
Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Revenue growth 1 year
+0.5%
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.
+10.0%
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.
+22.0%
Start year 2020 (pandemic). Over 10 years: +25.3% a year
Revenue growth 18 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.
+14.7%
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.
+8.0%
Earnings growth per share plus dividend.
Earnings per share, growth per year+8.0%
Dividend (yield on the price)0.0%
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.8.0% vs 19.1%, 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.14% → 11%
Start year 2020 (pandemic)

Growth Forecast

Price in line with expectations
The price assumes less growth than the company has delivered so far and about what 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).
+11.3%
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.
+10.4%
Yearly sales growth analysts expect, extended to five years.
After inflation (figures in GBP, UK: IMF forecast 2.3% a year to 2030, 3.3% from 2016 to 2025) that is about +8.7% a year for the price and +7.9% for the forecasts.
Forecast 2026 (sales)+11.9%
Forecast 2027 (sales)+11.9%
Projected 2028 (sales)+10.7%
Projected 2029 (sales)+9.4%
Projected 2030 (sales)+8.2%

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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 · 145 stocks

Beats the industry median on 12/13 measures
Overall it ranks above its industry peers.
Valuation
Quality Score 60 · Above median
Fair Value upside +22.3% · Top 25%
Profitability
Return on equity (TTM) 9.4% · Above median
Return on assets 5.4% · Above median
Net margin (TTM) 6.6% · Above median
Operating margin (TTM) 9.5% · Above median
Growth and dividend
Revenue growth 10.1% · Above median
Balance sheet
Debt / equity 0.31× · Highest 25%

Valuation Multiplesvs Scientific & Technical Instruments median · lower = cheaper

P/E (TTM) 20.0× · Cheapest 25%
P/B 2.21× · Cheaper than median
P/S (TTM) 1.59× · Cheaper than median
P/FCF 14.8× · Cheaper than median
EV/EBITDA 11.3× · Cheaper than median

Context: sector, industry, market

Values & ESG

Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.

None of the checked exposures detected

Similar stocks

10 more Scientific & Technical Instruments stocks, each showing price versus our Fair Value estimate.

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Keysight Technologies, Inc KEYS $362.15 $116.07 −68%
Coherent Corp COHR $292.21 $98.35 −66%
Garmin Ltd GRMN $294.14 $304.44 +4%
Chroma ATE Inc 2360 2,295 TWD 614.66 TWD −73%
Teledyne Technologies Incorporated TDY $605.59 $666.15 +10%
AVIC Chengdu Aircraft Company 302132 ¥72.18 ¥19.61 −73%
MKS Inc MKSI $260.82 $199.90 −23%
Fortive Corporation FTV $56.09 $35.20 −37%
Trimble Inc TRMB $57.85 $29.24 −49%
Cognex Corporation CGNX $58.75 $38.10 −35%

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Cite: Fair Value Calculator (2026). "SDI Group Fair Value". https://www.fairvalue-calculator.com/stock/SDIIF

Frequently asked questions

Is SDI Group (SDIIF) overvalued or undervalued?
As of Sep 24, 2026, our model estimates a fair value of $1.59 versus the last price from Sep 25, 2026 of $1.20, about +33% upside (undervalued).
What is the fair value of SDIIF?
Our model-based fair value for SDI Group is $1.59 (as of Sep 24, 2026), built from audited fundamentals. Last price (from Sep 25, 2026): $1.20.
What is the quality score of SDIIF?
SDI Group has a Quality Score of 60/100. 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 SDI Group (SDIIF)?
Our model-based price target is the fair value of $1.59 (as of Sep 24, 2026) from 24 valuation models. Cautious scenario $0.9300, optimistic scenario $2.07. It is a calculation from audited fundamentals, not an analyst target.
What is the SDI Group stock forecast for 2026?
Our models put fair value at $1.59, about +33% upside versus the last price from Sep 25, 2026 of $1.20 (undervalued). Cautious scenario $0.9300, optimistic scenario $2.07. The calculation is refreshed regularly with new filings.
What is the revenue of SDI Group (SDIIF)?
SDI Group reported trailing-twelve-month revenue of about £69.3M (latest available figure, as of Sep 24, 2026).
What growth is priced into SDI Group (SDIIF)?
For today's price to be fair in a discounted-cash-flow model, SDI Group would have to grow free cash flow by +11.3 % per year for five years (discount rate 13.0 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +22.0 % per year. As of Sep 24, 2026.
What discount rate (WACC) does the fair value of SDIIF use?
Our models discount SDI Group at 13.0 %: a base by market capitalisation (micro), damped by beta 1.09, 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 SDI Group that is +11.3 % per year a year over ten years, using the same discount rate (13.0 %) and the same formula as our fair value.
How much growth has SDI Group (SDIIF) delivered so far?
Over the past 5 years revenue at SDI Group grew +22.0 % a year. The price currently implies +11.3 % 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 SDI Group (SDIIF) growing?
The median revenue growth in the sector is +10.0 % a year. That is the yardstick for the growth priced into SDI Group (+11.3 % 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 SDI Group (SDIIF)?
The free-cash-flow yield on the price is 7.72 %: that much free cash flow SDI Group produces per unit of market value. When it exceeds the discount rate of our models (13.0 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of SDI Group (SDIIF)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For SDI Group it is $1.59 per share (as of Sep 24, 2026), against a price of $1.20. It is the blended result of 24 valuation models (cash flow, earnings, asset, dividend).
Is SDI Group stock overvalued or undervalued in 2026?
As of Sep 24, 2026, SDIIF trades below its calculated fair value: price $1.20, fair value $1.59, a gap of about +33% (undervalued). 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 SDIIF?
No. The price is what the market pays today ($1.20); the fair value is what the company's own numbers justify ($1.59). For SDI Group the two are $0.3900 per share apart. That gap is exactly why we show both numbers side by side.
How much is SDI Group worth?
The market values SDI Group at about $127M (market capitalisation, as of Sep 24, 2026). Per share that is $1.20; our models calculate a fair value of $1.59 per share.
What do the bullish and bearish scenarios say about SDIIF?
Our models span a range for SDI Group: cautious scenario $0.9300, base $1.59, optimistic $2.07 per share (as of Sep 24, 2026, price $1.20). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of SDIIF?
SDI Group trades at a price-to-earnings ratio of 20.0 (as of Sep 24, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of $1.59 is built from several models across several years. Other multiples: P/B 2.2, P/S 1.6, EV/EBITDA 11.3.
How solid is the balance sheet of SDI Group (SDIIF)?
Balance-sheet figures for SDI Group (as of Sep 24, 2026): return on equity 9.4%, debt of 0.31 per unit of equity. They feed the Quality Score of 60/100, which measures business quality independently of the share price.
How far is SDIIF from its 52-week high?
SDI Group trades at $1.20, about 7% below its 52-week high of $1.29 and 14% above the low of $1.05 (as of Sep 25, 2026). Distance from the high says nothing about value: that is what the fair value of $1.59 is for.
Which stocks are comparable to SDI Group?
From the same area (Technology) we also value Keysight Technologies, Inc, Coherent Corp, Garmin Ltd, Chroma ATE Inc, 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 SDI Group stock attractive at the current price?
The data as of Sep 24, 2026: price $1.20, calculated fair value $1.59 (+33%), Quality Score 60/100, 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 SDIIF calculated?
We run SDI Group 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 $1.59, 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 14.5 % above its aggregate fair value. SDI Group currently trades 25 % 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 SDI Group (SDIIF)?
The latest price we hold is from Sep 25, 2026 and stands at $1.20. Our model-based fair value is $1.59, about +33% upside (undervalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with SDI Group right now?
Solid quality (60/100) at a price below fair value, the discount is the argument here, not the business quality. A fairly wide model range ($0.9300 to $2.07) leaves room in how you read the outcome.

Key figures of SDI Group

How large is the market capitalisation of SDI Group (SDIIF)?
The market capitalisation of SDI Group is $127M. 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 SDI Group (SDIIF)?
The price-to-sales ratio of SDI Group is 1.20 (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 SDI Group (SDIIF)?
Earnings per share at SDI Group are $0.0600 (price ÷ EPS = P/E 20.0). Earnings per share over the last twelve months: total profit spread across every single share.
What is the net margin of SDI Group (SDIIF)?
The net margin of SDI Group is 6.0% (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 SDI Group (SDIIF)?
The return on equity (ROE) of SDI Group is 9.4% (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 SDI Group (SDIIF)?
On an EBIT basis the return on assets of SDI Group is 10.3% (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 SDI Group (SDIIF)?
The operating margin of SDI Group is 9.5% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at SDI Group (SDIIF)?
Revenue at SDI Group is growing +10.1% versus a year earlier (3y avg +10.0%). 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 SDI Group (SDIIF)?
Earnings per share at SDI Group are growing +46.4% versus a year earlier. How much earnings per share grew versus a year earlier.
How much net debt does SDI Group (SDIIF) carry?
The net debt of SDI Group is £20.7M (fiscal year 2025, ≈ 2.8 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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