Owens-CorningOC +7.11%82 Operating Margin % is 5.30% as of Mar. 2026, which is 62% below its 10-year median of 13.98. GuruFocus rates OC with a GF Score™ of 82/100 and a GF Value™ of $154.11 (Modestly Undervalued). The stock has 4 warning signs investors should review. Among 1,767 Construction companies, Owens-Corning ranks better than 79.29% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. Owens-Corning's Operating Income for the
three
months ended in Mar. 2026 was $120 Mil. Owens-Corning's Revenue for the
three
months ended in Mar. 2026 was $2,265 Mil. Therefore, Owens-Corning's Operating Margin % for the quarter that ended in Mar. 2026 was 5.30%.
Good Sign:
Owens-Corning Inc operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for Owens-Corning's Operating Margin % or its related term are showing as below:
OC'
s Operating Margin % Range Over the Past 10 Years
Min: 10.99 Med: 13.98 Max: 17.32
Current: 12.96
OC's Operating Margin % is ranked better than 79.29% of 1767
companies
in the Construction industry
Industry Median: 5.89
vs OC: 12.96
Owens-Corning's 5-Year Average Operating Margin % Growth Rate was 4.10% per year.
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.
Owens-Corning Operating Margin % Related Terms
Owens-Corning Operating Margin % Historical Data
* Premium members only.
The historical data trend for Owens-Corning'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.
OC vs WMS, SPXC, AAON: Operating Margin % Comparison
For the Building Products & Equipment subindustry, Owens-Corning'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.
Owens-Corning Operating Margin % vs Construction Industry
For the Construction industry and Industrials sector, Owens-Corning's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Owens-Corning'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.
Owens-Corning's Operating Margin % for the fiscal year that ended in Dec. 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.
Owens-Corning (OC) has a Operating Margin % of 5.30% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on Owens-Corning and its competitors. This is 62% below median its historical median of 13.98. Over the past decade, Owens-Corning's Operating Margin % has ranged from 10.99 to 17.32. According to the industry distribution chart, Owens-Corning ranks #366 out of 1767 companies in the Construction industry, placing it in the top 20.7%.
Is Owens-Corning's Operating Margin % too high?
Owens-Corning's current Operating Margin % of 5.30% is 62% below median its 10-year median of 13.98. Over the past 10 years, this metric has ranged from a low of 10.99 to a high of 17.32. The Construction industry median Operating Margin % is 5.89. Owens-Corning's value of 5.30% is 10% below this industry median. Based on the distribution chart, Owens-Corning ranks #366 out of 1767 companies in the Construction industry, which is in the top quartile — a strong position relative to peers. Overall, Owens-Corning has a GF Score™ of 82/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Owens-Corning's Operating Margin % compare to WMS and SPXC?
According to the Construction industry distribution chart, Owens-Corning ranks #366 out of 1767 companies for Operating Margin %. This places Owens-Corning in the top 21% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 5.89. Owens-Corning's value of 5.30% is 10% below this benchmark. Historically, Owens-Corning's own Operating Margin % has ranged from 10.99 to 17.32 over the past decade. While the company's 10-year median is 13.98 vs. the industry median of 5.89, Owens-Corning has consistently been below 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 Construction company?
The median Operating Margin % among Construction companies is 5.89, based on 1,767 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. Owens-Corning's current Operating Margin % of 5.30% is 10% below 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 Owens-Corning and its competitors. For the Construction industry, the median Operating Margin % is 5.89 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Owens-Corning's current Operating Margin % is 5.30%, which is 62% below median its own 10-year median of 13.98. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Owens-Corning stock overvalued right now?
Based on GuruFocus' analysis, Owens-Corning (OC) is currently considered Modestly Undervalued. The stock's GF Value™ is $154.11, compared to a current price of $132.95 — trading 13.7% below its estimated fair value. The current Operating Margin % is 5.30%, which is 62% below median its 10-year median of 13.98 and 10% below the Construction industry median of 5.89. Owens-Corning's overall GF Score™ is 82/100 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 Owens-Corning (OC), the current Operating Margin % is 5.30% as of Mar. 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 Owens-Corning (OC) Overvalued in 2026?
Based on GuruFocus' analysis, Owens-Corning stock appears to be undervalued.
The current stock price of $132.95 is trading 13.7% below its estimated GF Value™ of $154.11.
GuruFocus considers Owens-Corning to be Modestly Undervalued.
Key valuation signals for OC:
Operating Margin %: 5.30% (62% below median its 10-year median of 13.98)
GF Value™: $154.11 vs. price of $132.95 (13.7% below fair value)
Industry Position: 10% below the Construction median (#366 of 1767)
No single metric tells the full story. See the OC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Owens-Corning Inc is a building products company that offers roofing products and systems, insulation products (hermal and acoustical batts, loose fill insulation, spray foam insulation, wet use chopped strand, etc.), and doors and door systems. The company's reportable segments are: Roofing, Insulation, and Doors. Maximum revenue is generated from the Roofing segment, which manufactures and sells residential roofing shingles, oxidized asphalt materials, roofing components, and composite lumber mainly used in residential construction. This segment also manufactures and sells glass mat and specialty veil materials used in building and construction applications. Geographically, the company generates maximum revenue from the United States, followed by Europe, Asia-Pacific, and other markets.
82GF Score
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