SDI GroupSDIIF 93 Operating Margin % is 9.45% as of Oct. 2025, which is 33% below its 10-year median of 14.08. GuruFocus rates SDIIF with a GF Score™ of 93/100 and a GF Value™ of $1.31 (Modestly Undervalued). The stock has 4 warning signs investors should review. Among 2,472 Hardware companies, SDI Group ranks better than 78.6% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. SDI Group's Operating Income for the
six
months ended in Oct. 2025 was $4.30 Mil. SDI Group's Revenue for the
six
months ended in Oct. 2025 was $45.43 Mil. Therefore, SDI Group's Operating Margin % for the quarter that ended in Oct. 2025 was 9.45%.
Warning Sign:
SDI Group PLC operating margin has been in a 5-year decline. The average rate of decline per year is -8.6%.
The historical rank and industry rank for SDI Group's Operating Margin % or its related term are showing as below:
SDIIF'
s Operating Margin % Range Over the Past 10 Years
Min: 8.63 Med: 14.08 Max: 20.5
Current: 11.13
SDIIF's Operating Margin % is ranked better than 78.6% of 2472
companies
in the Hardware industry
Industry Median: 3.8
vs SDIIF: 11.13
SDI Group's 5-Year Average Operating Margin % Growth Rate was -8.60% per year.
SDI Group's Operating Income for the
six
months ended in Oct. 2025 was $4.30 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in Oct. 2025 was $10.21 Mil.
SDI Group (OTCPK:SDIIF) Operating Margin % Explanation
Just like Gross Margin %, it is important to see a company maintains its operating margin over time. Among the same industry, a company with higher operating margin is more efficient in its operation. It is also more stable during industry slowdown or recessions. Peter Lynch prefers those with higher margins than those with lower margins.
Be Aware
Operating Margin % can be manipulated by adjusting the rate of depreciation, depletion and amortization (DDA).
If a company is facing competition, its Operating Margin % may decline. Often the Operating Margin % declines well before the company's Revenue or even profit decline. Therefore, Operating Margin % is a very important indicator of whether the company is facing problems.
For instance, by 2012, Nokia (NOK)'s problems were well known and its stock had lost more than 90% of its market value since 2007. But Nokias Operating Margin % had already been in decline since 2002, although its Earnings per Share (Diluted) were still rising. Investors who paid attention to Operating Margin % would have avoided this huge loss. The same can be said for Research-in-Motion (RIMM).
Therefore, Operating Margin % is a very important screening filter for GuruFocus. GuruFocus's Buffett-Munger screener requires that the profit margin is either consistent or expanding. The Model Portfolio of the Buffett-Munger screener has outperformed the market every year since inception in 2009.
SDI Group Operating Margin % Related Terms
SDI Group Operating Margin % Historical Data
* Premium members only.
The historical data trend for SDI Group's Operating Margin % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
SDIIF vs COHR, KEYS, GRMN: Operating Margin % Comparison
For the Scientific & Technical Instruments subindustry, SDI Group's Operating Margin %, along with its competitors' market caps and Operating Margin % 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 Operating Margin % vs Hardware Industry
For the Hardware industry and Technology sector, SDI Group's Operating Margin % distribution charts can be found below:
* The bar in red indicates where SDI Group's Operating Margin % falls into.
Operating Margin % - also known as operating income margin, operating profit margin and return on sales (ROS) - is the ratio of Operating Income divided by net sales or Revenue, usually presented in percent.
SDI Group's Operating Margin % for the fiscal year that ended in Apr. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
SDI Group (SDIIF) has a Operating Margin % of 9.45% as of Oct. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on SDI Group and its competitors. This is 33% below median its historical median of 14.08. Over the past decade, SDI Group's Operating Margin % has ranged from 8.63 to 20.50. According to the industry distribution chart, SDI Group ranks #529 out of 2472 companies in the Hardware industry, placing it in the top 21.4%.
Is SDI Group's Operating Margin % too high?
SDI Group's current Operating Margin % of 9.45% is 33% below median its 10-year median of 14.08. Over the past 10 years, this metric has ranged from a low of 8.63 to a high of 20.50. The Hardware industry median Operating Margin % is 3.80. SDI Group's value of 9.45% is 148.7% above this industry median. Based on the distribution chart, SDI Group ranks #529 out of 2472 companies in the Hardware industry, which is in the top quartile — a strong position relative to peers. 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 Operating Margin % compare to COHR and KEYS?
According to the Hardware industry distribution chart, SDI Group ranks #529 out of 2472 companies for Operating Margin %. This places SDI Group in the top 21% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 3.80. SDI Group's value of 9.45% is 148.7% above this benchmark. Historically, SDI Group's own Operating Margin % has ranged from 8.63 to 20.50 over the past decade. While the company's 10-year median is 14.08 vs. the industry median of 3.80, SDI Group has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Operating Margin % for a Hardware company?
The median Operating Margin % among Hardware companies is 3.80, based on 2,472 companies in the industry. Companies in the top quartile (top 25%) have a Operating Margin % significantly above this median, while those in the bottom quartile fall well below. However, Operating Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. SDI Group's current Operating Margin % of 9.45% is 148.7% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Operating Margin % mean?
A high Operating Margin % can signal that a stock is expensive relative to its fundamentals. Operating margin is the ratio of total operating income to net sales. View historical data on SDI Group and its competitors. For the Hardware industry, the median Operating Margin % is 3.80 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. SDI Group's current Operating Margin % is 9.45%, which is 33% below median its own 10-year median of 14.08. 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 $1.31, compared to a current price of $1.05 — trading 19.8% below its estimated fair value. The current Operating Margin % is 9.45%, which is 33% below median its 10-year median of 14.08 and 148.7% above the Hardware industry median of 3.80. SDI Group's overall GF Score™ is 93/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Operating Margin % calculated?
Operating Margin % is calculated from a company's financial statements. For SDI Group (SDIIF), the current Operating Margin % is 9.45% as of Oct. 2025. 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 19.8% below its estimated GF Value™ of $1.31.
GuruFocus considers SDI Group to be Modestly Undervalued.
Key valuation signals for SDIIF:
Operating Margin %: 9.45% (33% below median its 10-year median of 14.08)
GF Value™: $1.31 vs. price of $1.05 (19.8% below fair value)
Industry Position: 148.7% above the Hardware median (#529 of 2472)
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 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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