Building and construction materials manufacturer Owens Corning (NYSE: OC) beat Wall Street’s revenue expectations in Q1 CY2026, but sales fell by 10.5% year on year to $2.27 billion. On top of that, next quarter’s revenue guidance ($2.65 billion at the midpoint) was surprisingly good and 3.2% above what analysts were expecting. Its non-GAAP profit of $1.22 per share was 26.5% above analysts’ consensus estimates.

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Company Overview

Credited with the discovery of fiberglass, Owens Corning (NYSE: OC) supplies building and construction materials to the United States and international markets.

Revenue Growth

A company’s long-term performance is an indicator of its overall quality. Any business can experience short-term success, but top-performing ones enjoy sustained growth for years. Unfortunately, Owens Corning’s 5.9% annualized revenue growth over the last five years was tepid. This fell short of our benchmark for the industrials sector and is a poor baseline for our analysis.

We at StockStory place the most emphasis on long-term growth, but within industrials, a half-decade historical view may miss cycles, industry trends, or a company capitalizing on catalysts such as a new contract win or a successful product line. Owens Corning’s recent performance shows its demand has slowed as its annualized revenue growth of 2.5% over the last two years was below its five-year trend. We’re wary when companies in the sector see decelerations in revenue growth, as it could signal changing consumer tastes aided by low switching costs.

This quarter, Owens Corning’s revenue fell by 10.5% year on year to $2.27 billion but beat Wall Street’s estimates by 4.1%. Company management is currently guiding for a 3.5% year-on-year decline in sales next quarter.

Looking further ahead, sell-side analysts expect revenue to remain flat over the next 12 months, a slight deceleration versus the last two years. This projection doesn't excite us and suggests its products and services will face some demand challenges.

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Operating Margin

Owens Corning has been an efficient company over the last five years. It was one of the more profitable businesses in the industrials sector, boasting an average operating margin of 13.7%. This result was particularly impressive because of its low gross margin, which is mostly a factor of what it sells and takes huge shifts to move meaningfully. Companies have more control over their operating margins, and it’s a show of well-managed operations if they’re high when gross margins are low.

Analyzing the trend in its profitability, Owens Corning’s operating margin decreased by 17 percentage points over the last five years. This raises questions about the company’s expense base because its revenue growth should have given it leverage on its fixed costs, resulting in better economies of scale and profitability.

In Q1, Owens Corning generated an operating margin profit margin of 5.3%, down 10.8 percentage points year on year. Since Owens Corning’s operating margin decreased more than its gross margin, we can assume it was less efficient because expenses such as marketing, R&D, and administrative overhead increased.

Earnings Per Share

Revenue trends explain a company’s historical growth, but the long-term change in earnings per share (EPS) points to the profitability of that growth – for example, a company could inflate its sales through excessive spending on advertising and promotions.

Owens Corning’s EPS grew at 10.4% compounded annual growth rate over the last five years, higher than its 5.9% annualized revenue growth. However, this alone doesn’t tell us much about its business quality because its operating margin didn’t improve.

Diving into the nuances of Owens Corning’s earnings can give us a better understanding of its performance. A five-year view shows that Owens Corning has repurchased its stock, shrinking its share count by 23.5%. This tells us its EPS outperformed its revenue not because of increased operational efficiency but financial engineering, as buybacks boost per share earnings.

Like with revenue, we analyze EPS over a more recent period because it can provide insight into an emerging theme or development for the business.

For Owens Corning, its two-year annual EPS declines of 17% mark a reversal from its (seemingly) healthy five-year trend. We hope Owens Corning can return to earnings growth in the future.

In Q1, Owens Corning reported adjusted EPS of $1.22, down from $2.97 in the same quarter last year. Despite falling year on year, this print easily cleared analysts’ estimates. Over the next 12 months, Wall Street expects Owens Corning’s full-year EPS of $10.20 to stay about the same.

Key Takeaways from Owens Corning’s Q1 Results

It was good to see Owens Corning beat analysts’ EPS expectations this quarter. We were also excited its revenue outperformed Wall Street’s estimates by a wide margin. Overall, we think this was a solid quarter with some key areas of upside. The stock traded up 6% to $130.25 immediately after reporting.

Sure, Owens Corning had a solid quarter, but if we look at the bigger picture, is this stock a buy? The latest quarter does matter, but not nearly as much as longer-term fundamentals and valuation, when deciding if the stock is a buy. We cover that in our actionable full research report which you can read here (it’s free).