PorvairLSE:PRV +4.17%94 Pretax Margin % is 12.43% as of Nov. 2025, which is 24% above its 10-year median of 10.06. GuruFocus rates LSE:PRV with a GF Score™ of 94/100 and a GF Value™ of £7.57 (Modestly Overvalued). The stock has 5 warning signs investors should review. Among 3,032 Industrial Products companies, Porvair ranks better than 73.68% on this metric.
Pre-Tax margin is calculated as Pre-Tax Income divided by its Revenue. Porvair's Pre-Tax Income for the
six
months ended in Nov. 2025 was £12.0 Mil. Porvair's Revenue for the
six
months ended in Nov. 2025 was £96.3 Mil. Therefore, Porvair's pretax margin for the quarter that ended in Nov. 2025 was 12.43%.
The historical rank and industry rank for Porvair's Pretax Margin % or its related term are showing as below:
LSE:PRV'
s Pretax Margin % Range Over the Past 10 Years
Min: 8.56 Med: 10.06 Max: 12.01
Current: 12.01
LSE:PRV's Pretax Margin % is ranked better than 73.68% of 3032
companies
in the Industrial Products industry
Industry Median: 5.85
vs LSE:PRV: 12.01
Porvair (LSE:PRV) Pretax Margin % Explanation
The pretax margin, as know as pretax profit margin, is widely used to measure the operating efficiency of a company before deducting taxes.
The pretax margin is sometimes preferred over the net margin as tax expenditures can make profitability comparisons between companies misleading.
It is a useful tool to compare companies operating in the same sector and less effective when comparing companies from other sectors as each industry generally has different operating expenses and sales patterns.
The long term trend of the pretax margin is a good indicator of the competitiveness and health of the business.
Porvair Pretax Margin % Related Terms
Porvair Pretax Margin % Historical Data
* Premium members only.
The historical data trend for Porvair's Pretax 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.
LSE:PRV vs VLTO, ZWS, CECO: Pretax Margin % Comparison
For the Pollution & Treatment Controls subindustry, Porvair's Pretax Margin %, along with its competitors' market caps and Pretax 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.
Porvair Pretax Margin % vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Porvair's Pretax Margin % distribution charts can be found below:
* The bar in red indicates where Porvair's Pretax Margin % falls into.
* 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.
Porvair (LSE:PRV) has a Pretax Margin % of 12.43% as of Nov. 2025. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on Porvair and its competitors. This is 24% above median its historical median of 10.06. Over the past decade, Porvair's Pretax Margin % has ranged from 8.56 to 12.01. According to the industry distribution chart, Porvair ranks #798 out of 3032 companies in the Industrial Products industry, placing it in the top 26.3%.
Is Porvair's Pretax Margin % too high?
Porvair's current Pretax Margin % of 12.43% is 24% above median its 10-year median of 10.06. Over the past 10 years, this metric has ranged from a low of 8.56 to a high of 12.01. The Industrial Products industry median Pretax Margin % is 5.85. Porvair's value of 12.43% is 112.5% above this industry median. Based on the distribution chart, Porvair ranks #798 out of 3032 companies in the Industrial Products industry, which is above the industry midpoint. Overall, Porvair has a GF Score™ of 94/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Porvair's Pretax Margin % compare to VLTO and ZWS?
According to the Industrial Products industry distribution chart, Porvair ranks #798 out of 3032 companies for Pretax Margin %. This puts Porvair in the upper half of its industry. The industry median Pretax Margin % is 5.85. Porvair's value of 12.43% is 112.5% above this benchmark. Historically, Porvair's own Pretax Margin % has ranged from 8.56 to 12.01 over the past decade. While the company's 10-year median is 10.06 vs. the industry median of 5.85, Porvair 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 Pretax Margin % for an Industrial Products company?
The median Pretax Margin % among Industrial Products companies is 5.85, based on 3,032 companies in the industry. Companies in the top quartile (top 25%) have a Pretax Margin % significantly above this median, while those in the bottom quartile fall well below. However, Pretax Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Porvair's current Pretax Margin % of 12.43% is 112.5% 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 Pretax Margin % mean?
A high Pretax Margin % can signal that a stock is expensive relative to its fundamentals. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on Porvair and its competitors. For the Industrial Products industry, the median Pretax Margin % is 5.85 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Porvair's current Pretax Margin % is 12.43%, which is 24% above median its own 10-year median of 10.06. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Porvair stock overvalued right now?
Based on GuruFocus' analysis, Porvair (LSE:PRV) is currently considered Modestly Overvalued. The stock's GF Value™ is £7.57, compared to a current price of £8.50 — trading 12.3% above its estimated fair value. The current Pretax Margin % is 12.43%, which is 24% above median its 10-year median of 10.06 and 112.5% above the Industrial Products industry median of 5.85. Porvair's overall GF Score™ is 94/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Pretax Margin % calculated?
Pretax Margin % is calculated from a company's financial statements. For Porvair (LSE:PRV), the current Pretax Margin % is 12.43% as of Nov. 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 Porvair (LSE:PRV) Overvalued in 2026?
Based on GuruFocus' analysis, Porvair stock appears to be overvalued.
The current stock price of £8.50 is trading 12.3% above its estimated GF Value™ of £7.57.
GuruFocus considers Porvair to be Modestly Overvalued.
Key valuation signals for LSE:PRV:
Pretax Margin %: 12.43% (24% above median its 10-year median of 10.06)
GF Value™: £7.57 vs. price of £8.50 (12.3% above fair value)
Industry Position: 112.5% above the Industrial Products median (#798 of 3032)
No single metric tells the full story. See the LSE:PRV stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Porvair PLC is an environmental treatment control company. It develops filtration solutions to be used by various types of industries. The company caters to its clients through three divisions: Aerospace and Industrial, Laboratory, and Metal Melt Quality. The Aerospace and Industrial Division is a key revenue generator, principally serving the aviation, energy, and industrial markets. Laboratory Division principally serving the bioscience and environmental laboratory instrument and consumables market. Metal Melt Quality Division principally serves the world aluminium, North American Free Trade Agreement (NAFTA), iron foundry, and superalloys markets. The company generates the majority of its manufacturing revenue from sales in the United States.
94GF Score
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