• Corning for building insulation and roofing.
• 3M for home and industrial building products.

• Insulation: Owens Corning provides a wide range of insulation products, including fiberglass and mineral wool, for residential, commercial, and industrial buildings.
• Roofing: The company manufactures shingles and complete roofing systems designed for durability and aesthetic appeal in residential and commercial applications.
• Fiberglass Composites: Owens Corning produces fiberglass reinforcements and engineered materials used in various composite applications across industries such as automotive, wind energy, and construction.

Owens-Corning (NYSE: OC) Major Customers

Owens-Corning (NYSE: OC) primarily sells its products to other businesses (B2B) rather than directly to individual consumers. The company operates across three main segments: Insulation, Roofing, and Composites.

Due to the diversified nature of its operations and broad customer base, Owens Corning does not typically disclose specific major customer companies. According to its annual reports (e.g., the 2023 10-K), no single customer accounts for 10% or more of its consolidated net sales. Therefore, instead of identifying specific major customer companies by name, it is more accurate to describe the categories of business customers and channels through which its products are distributed.

Categories of Business Customers and Channels:

• Building Material Distributors and Wholesalers: These companies purchase Owens Corning's insulation and roofing products in large volumes and then resell them to contractors, builders, and smaller retailers. This category includes national and regional distributors critical to the building materials supply chain.
• Home Improvement Retailers: Large retail chains that cater to both professional contractors and individual consumers often stock Owens Corning's insulation, roofing, and related building materials.
  • Examples of public companies in this category include:
    • The Home Depot, Inc. (NYSE: HD)
    • Lowe's Companies, Inc. (NYSE: LOW)
• Building Contractors and Builders: Owens Corning also sells directly to large-scale residential and commercial building contractors and home builders who incorporate the company's insulation and roofing products into their construction projects.
• Manufacturers Across Diverse Industries (for Composites Segment): Customers for Owens Corning's advanced fiberglass composites are manufacturers that incorporate these materials into their own finished products. These industries include:
  • Transportation: Automotive, marine, and other vehicle manufacturers utilizing lightweight and durable composite components.
  • Wind Energy: Manufacturers of wind turbine blades, which extensively use fiberglass composites.
  • Infrastructure & Construction: Companies producing composite materials for applications such as rebar, pipes, and other structural components.
  • Consumer Goods: Manufacturers of appliances, electronics, and various other consumer products requiring fiberglass reinforcements for strength and durability.

Brian Chambers, Board Chair, President, and Chief Executive Officer

Mr. Chambers was appointed CEO in 2019 and elected Board Chair in 2020. He has over 18 years of global business and leadership experience with Owens Corning, holding various senior leadership roles including President and Chief Operating Officer, and President of the Roofing business. Prior to rejoining Owens Corning in 2011, Mr. Chambers served as President of Saint-Gobain's distribution business in North America, a role he took in 2007 with the divestiture of Owens Corning's siding business to Saint-Gobain. He also held commercial and operational roles at Honeywell and BOC Gases.

Todd Fister, Executive Vice President and Chief Financial Officer

Mr. Fister was appointed CFO in September 2023. From 2019 to 2023, he served as President of the Owens Corning Insulation business. His previous roles at Owens Corning include Vice President of Global Insulation and Strategy, and Managing Director for multiple global Insulation businesses. Before joining Owens Corning in 2014, Mr. Fister spent seven years at MeadWestvaco (now WestRock) in finance, corporate development, and strategy roles, and also worked at Kimberly-Clark and Procter & Gamble. He led over $1.5 billion in M&A activity prior to his time at Owens Corning.

Gina A. Beredo, Executive Vice President, Chief Administrative Officer, and General Counsel

Ms. Beredo was appointed to her current role in March 2025. She joined Owens Corning in 2021 as executive vice president, general counsel, and corporate secretary. Prior to Owens Corning, she served as executive vice president, general counsel, and corporate secretary for Nordson Corporation, where she was also deputy general counsel.

Dr. Jose Méndez-Andino, Executive Vice President and Chief Research & Development Officer

Dr. Méndez-Andino was appointed Chief Research & Development Officer in April 2021. He joined Owens Corning in 2012 and previously held the position of Vice President of Science and Technology for the company's Insulation and Roofing businesses. Before joining Owens Corning, Dr. Méndez-Andino spent 10 years at Procter & Gamble, serving in various leadership roles in science, product development, and new business creation.

Paula Russell, Executive Vice President and Chief Human Resources Officer

Ms. Russell has served as Executive Vice President and Chief Human Resources Officer since 2021. Her previous roles at Owens Corning include Senior Vice President and Chief Human Resources Officer, Vice President and Chief Human Resources Officer, and Vice President of Total Rewards and Center of Excellence.

The increasing adoption and technological advancements in integrated solar roofing systems pose a clear emerging threat to Owens-Corning's traditional asphalt shingle roofing business. As solar energy becomes more accessible and aesthetically integrated into roofing materials (e.g., solar shingles and tiles from competitors like GAF Energy and Tesla), homeowners and commercial builders may increasingly opt for these solutions that combine weather protection with energy generation. This shift could erode market share for conventional asphalt shingles, which represent a significant portion of Owens-Corning's roofing segment, as the value proposition of a roof expands beyond mere protection to include power generation.

Owens-Corning (NYSE: OC) operates in several key markets, primarily roofing, insulation, and composite materials.

Roofing

• The global roofing market was valued at approximately USD 213.76 billion in 2023 and is projected to reach USD 280.29 billion by 2029, growing at a compound annual growth rate (CAGR) of 4.62%.
• The U.S. roofing shingles market alone was valued at USD 7.47 billion in 2024 and is expected to grow to USD 10.36 billion by 2030, with a CAGR of 5.60%.
• The Asia-Pacific region held the largest share of the global roofing market, accounting for over 37% of global revenue in 2023.

Insulation

• The global building insulation market was valued at USD 28.90 billion in 2023 and is anticipated to reach USD 31.2 billion by 2032, with a CAGR of 3.8% during the forecast period.
• The global OEM insulation market size was approximately USD 37.29 billion in 2025 and is projected to reach around USD 59.87 billion by 2034, growing at a CAGR of 5.40% from 2025 to 2034.
• In the OEM insulation market, the Asia-Pacific region is a significant player, with an estimated market size of USD 14.54 billion in 2025, expected to rise to around USD 23.65 billion by 2034.

Composites

• The global composites market was valued at an estimated USD 108.8 billion in 2023 and is projected to reach USD 181.7 billion by 2028, at a CAGR of 10.8%. Another estimate places the global composites market size at USD 118.49 billion in 2024, with a projection to reach approximately USD 213.32 billion by 2034, growing at a CAGR of 6.05% from 2025 to 2034.
• The Asia-Pacific region holds the largest share of the global composites market. The Asia-Pacific composites market size was valued at USD 53.91 billion in 2024 and is anticipated to reach around USD 97.27 billion by 2034, with a CAGR of 6.07% from 2025 to 2034.

Here are 3-5 expected drivers of future revenue growth for Owens-Corning (OC) over the next 2-3 years:

1. Expanded Roofing Manufacturing Capacity: Owens-Corning is investing significantly in increasing its shingle manufacturing capacity, including building a new facility in the southeastern United States, which is anticipated to begin production in 2027. This expansion, along with laminate capabilities added at its Medina, Ohio facility, is designed to meet strong and growing demand for its high-performing laminate shingles, such as the premium Duration® series.
2. Growth from the Masonite Acquisition: The 2024 acquisition of Masonite International Corporation is a transformative strategic move that provides a new growth platform for Owens-Corning. The Doors segment, bolstered by this acquisition, is expected to see increased adjusted EBITDA margins over the next one to three years, driven by cost synergies and anticipated improvements in market conditions.
3. Strategic Focus on Sustainable and Energy-Efficient Solutions: The company's emphasis on Environmental, Social, and Governance (ESG) initiatives, particularly in its insulation business and its broader commitment to energy transition, serves as a solid growth platform. Owens-Corning aims to provide durable, sustainable, and energy-efficient building solutions, aligning with increasing market demand for such products.
4. New Product Innovation: Continuous innovation and the launch of new products, such as the "Evergreen Mist" 2026 Shingle Color of the Year within the TruDefinition® Duration® Designer shingle line, are expected to drive demand by offering enhanced curb appeal and performance. The company's executive leadership highlights leveraging product, process, and material science innovation to accelerate growth.

Share Repurchases

• Owens Corning returned approximately $2.8 billion of cash to shareholders through dividends and share repurchases between 2020 and 2023, repurchasing over 20% of its outstanding shares during this period.
• In 2024, the company repurchased 2.6 million shares of common stock for $430 million, and a new share repurchase authorization for up to 12 million additional shares was approved in May 2025.
• The company's capital allocation strategy commits to returning approximately 50% of free cash flow to shareholders over time through dividends and share repurchases.

Share Issuance

• In connection with the acquisition of Masonite International Corporation in May 2024, Owens Corning issued equity awards for Masonite outstanding equity awards, with a fair value of $35 million included in transaction consideration for time-vesting restricted stock units.

Inbound Investments

• No information is available regarding large inbound investments made in Owens Corning by third parties over the last 3-5 years.

Outbound Investments

• Owens Corning completed the acquisition of Masonite International Corporation in May 2024 for approximately $3.9 billion, significantly expanding its leadership in branded residential products with interior and exterior doors and door systems.
• On February 14, 2025, Owens Corning announced a definitive agreement to sell its global glass reinforcements business for approximately $436 million, less costs to sell, with the transaction expected to close in 2025.

Capital Expenditures

• Capital expenditures totaled $446 million in 2022, $526 million in 2023, and $647 million in 2024.
• Expected capital additions for 2025 are approximately $800 million, reflecting significant multi-year organic investments in new manufacturing capacity.
• Primary focus areas for capital expenditures include expanding the Roofing manufacturing network with a new shingle plant in Prattville, Alabama, and increasing production capacity for core insulation products with a new fiberglass insulation line in Kansas City and a new XPS insulation plant in Arkansas.