SDIIF (SDI Group) GF Value Rank: 8 (As of Jul. 08, 2026) — 100% Above Median


SDIIF SDI Group PLC SDIIF
93 GF Score
Price $1.05
GF Value $1.30
Valuation Modestly Undervalued
! 7 Warning Signs
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What is SDI Group GF Value Rank?

SDI Group SDIIF 93 GF Value Rank is 8 as of Jul. 08, 2026, which is 100% above its 10-year median of 4.00. GuruFocus rates SDIIF with a GF Score™ of 93/100 and a GF Value™ of $1.30 (Modestly Undervalued). The stock has 7 warning signs investors should review.

SDI Group has the GF Value Rank of 8.

GF Value Rank evaluates the exclusive GuruFocus valuation and performance of a stock, rated on a scale from 1 to 10. It is determined by the price-to-GF-Value (P/GF Value) ratio, a proprietary metric calculated based on historical multiples along with an adjustment factor based on a company's past returns and growth and future estimates of the business' performance.

GuruFocus found that for valuation, we cannot simply give stocks a better GF Value rank simply because they have a lower P/GF Value ratio. Backtesting shows that over the long term, the two worst-performing groups are the most expensive group (with the highest P/GF Value ratio) and the least expensive group (with the lowest P/GF Value ratio).

We can understand why the most expensive group underperforms. We were initially puzzled by the underperformance of the least expensive group, but we realized there is a reason why some stocks are super cheap. If they look too undervalued, it is often because the businesses behind them are poor quality. The market realized this and gave them low valuations. In a way, the market is efficient.

After multiple backtesting analyses, we granted the stocks in third-cheapest percentile the highest GF Value rank, as they have performed the best over a full market cycle. Stock performance is actually not as sensitive to valuation as it is to growth and profitability. On average, the companies in the 20%-50% valuation groups have similar performances. Therefore, we should avoid the most expensive and the least expensive stocks. We can be more tolerant of valuation.

A higher score indicates a stock with a relatively low valuation and substantial potential for outperformance. Conversely, a lower score often reflects stocks that are either highly overvalued or deeply undervalued, both of which tend to underperform.

Please click GF Score to see more details on the GF Score's 5 Key Aspects of Analysis.

SDIIF vs COHR, KEYS, GRMN: GF Value Rank Comparison

For the Scientific & Technical Instruments subindustry, SDI Group's GF Value Rank, along with its competitors' market caps and GF Value Rank data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.

SDI Group GF Value Rank vs Hardware Industry

For the Hardware industry and Technology sector, SDI Group's GF Value Rank distribution charts can be found below:

* The bar in red indicates where SDI Group's GF Value Rank falls into.


SDIIF
93GF Score
SDI Group PLC SDIIF
GF Value Rank is just one metric. See GF Score™, valuation, warning signs, and more.
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Frequently Asked Questions Learn more about GF Value Rank →
What does a GF Value Rank of 8 mean?
SDI Group (SDIIF) has a GF Value Rank of 8 as of Jul. 08, 2026. GF Value Rank is given based on historical multiples along with past returns, growth and future estimates of the business' performance. View historical data on SDI Group and its competitors. This is 100% above median its historical median of 4.00. Over the past decade, SDI Group's GF Value Rank has ranged from 2.00 to 10.00.
Is SDI Group's GF Value Rank too high?
SDI Group's current GF Value Rank of 8 is 100% above median its 10-year median of 4.00. Over the past 10 years, this metric has ranged from a low of 2.00 to a high of 10.00. Overall, SDI Group has a GF Score™ of 93/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does SDI Group's GF Value Rank compare to COHR and KEYS?
SDI Group's GF Value Rank of 8 can be compared against companies in the Hardware industry. Historically, SDI Group's own GF Value Rank has ranged from 2.00 to 10.00 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good GF Value Rank for a Hardware company?
A good GF Value Rank depends on the Hardware industry context. However, GF Value Rank should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high GF Value Rank mean?
A high GF Value Rank can signal that a stock is expensive relative to its fundamentals. GF Value Rank is given based on historical multiples along with past returns, growth and future estimates of the business' performance. View historical data on SDI Group and its competitors. SDI Group's current GF Value Rank is 8, which is 100% above median its own 10-year median of 4.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is SDI Group stock overvalued right now?
Based on GuruFocus' analysis, SDI Group (SDIIF) is currently considered Modestly Undervalued. The stock's GF Value™ is $1.30, compared to a current price of $1.05 — trading 19.2% below its estimated fair value. The current GF Value Rank is 8, which is 100% above median its 10-year median of 4.00. SDI Group's overall GF Score™ is 93/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is GF Value Rank calculated?
GF Value Rank is calculated from a company's financial statements. For SDI Group (SDIIF), the current GF Value Rank is 8 as of Jul. 08, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is SDI Group (SDIIF) Overvalued in 2026?

Based on GuruFocus' analysis, SDI Group stock appears to be undervalued. The current stock price of $1.05 is trading 19.2% below its estimated GF Value™ of $1.30. GuruFocus considers SDI Group to be Modestly Undervalued.

Key valuation signals for SDIIF:

  • GF Value Rank: 8 (100% above median its 10-year median of 4.00)
  • GF Value™: $1.30 vs. price of $1.05 (19.2% below fair value)
  • GF Score™: 93/100 with 7 warning signs

No single metric tells the full story. See the SDIIF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

SDI Group Business Description

Other Exchanges SDI:UKSD0:Germany
Address Nuffield Road, Beacon House, Cambridge, GBR, CB4 1TF
SDI Group PLC designs and manufactures scientific and technology products for use by the life science, healthcare, astronomy, consumer manufacturing, and art conservation markets through Synoptics, the Artemis, the Opus instruments, and Astles Control systems brands. The Digital Imaging segment incorporates the Synoptics brands Syngene, Synbiosis, Synoptics Health and Fistreem, the Atik brands Atik Cameras, Opus, and Quantum Scientific Imaging, and the Graticules Optics business. The Sensors & Control segment combines Sentek, Astles Control Systems, Applied Thermal Control, Thermal Exchange, MPB Industries, and Chell Instruments businesses. It operates in the UK, Europe, America, Rest of Asia, and Rest of the world segments. It derives majority of its revenues from the United Kingdom.
93GF Score

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GF Value Rank is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$1.05
Price
$1.30
GF Value