Based on the company description provided, Cornerstone Building Brands, Inc. (symbol: CNR) sells primarily to other companies within the commercial, residential, and repair and remodel markets. As the background does not specify individual customer company names, its major customers can be categorized as follows:

• Homebuilders and Residential Contractors: These companies purchase products such as windows, patio doors, various types of siding, and other external building materials for new residential construction projects and significant home renovations.
• Commercial Contractors and Developers: Customers in this category acquire metal building systems, metal roofing and wall systems, windows, and other building components for the construction of commercial, industrial, and institutional properties.
• Building Material Distributors and Large Retailers: These entities act as intermediaries, purchasing Cornerstone Building Brands' products in large volumes and then distributing them to a diverse range of smaller contractors, remodelers, and professional builders, often catering to both residential and commercial repair and remodel demands.

Gunner Smith, Chief Executive Officer

Gunner Smith began serving as Chief Executive Officer for Cornerstone Building Brands on August 11, 2025. Prior to joining Cornerstone Building Brands, Mr. Smith served as president of Roofing at Owens Corning, an $11 billion leading building products manufacturer, a position he held since 2018. He also held roles as vice president of sales, distribution, and home centers, and other sales, marketing, and pricing positions during his 17 years with Owens Corning. Before Owens Corning, he was National Sales Manager at Ply Gem, one of the companies that later formed Cornerstone Building Brands. Earlier in his career, he spent eight years in sales management roles at Elk Corporation. He has been a board member of Howmet Aerospace since 2023. Cornerstone Building Brands was acquired by the private equity firm Clayton Dubilier & Rice in 2022, making it a private equity-backed company.

Christian Storch, Interim Chief Financial Officer

Christian Storch began serving as interim chief financial officer for Cornerstone Building Brands on February 6, 2026. With 25 years of experience in financial leadership, he previously served as chief financial officer at Altra Industrial Motion Corp for nearly 15 years. Before that, he held the positions of vice president and chief financial officer at Standex International Corporation for six years, where he also managed treasury and corporate audit and assurance services. Mr. Storch was also on the board of directors of Standex International from 2004 to 2007. Earlier in his career, he worked as a divisional financial director and corporate controller at Vossloh AG, a publicly held German transport technology company, and as an audit manager at Deloitte & Touche LLP.

Alena Brenner, Executive Vice President, General Counsel and Corporate Secretary

Alena Brenner joined Cornerstone Building Brands as Executive Vice President, General Counsel and Corporate Secretary on April 5, 2021, overseeing the company's legal, compliance, and risk management functions. Prior to Cornerstone Building Brands, Ms. Brenner served as Vice President and Deputy General Counsel for Ryder System, Inc. Before her work with Ryder, she was the Director of Commercial Law and M&A at the New York headquarters of Anheuser-Busch InBev (AB InBev).

Lisa Domnisch, President, Canadian Business Unit

Lisa Domnisch joined Cornerstone Building Brands as President of its Canadian Business Unit in August 2023. She brings nearly 20 years of strategic leadership experience in product development, business planning, sales and marketing, and operational excellence. Most recently, Ms. Domnisch served as Global Product Leader for DuPont's Water & Protection construction business.

Matthew Ackley, President, Metal Solutions

Matthew Ackley joined Cornerstone Building Brands as President, Engineered Building Systems on April 12, 2021, and was promoted to President, Metal Solutions effective November 11, 2021. He has nearly 20 years of leadership experience in the building materials industry. Most recently, Mr. Ackley served as Vice President, Sales for USG Corporation, where he oversaw its Commercial Ceilings and Corporate Accounts teams, leading strategic planning, sales execution, and revenue and profit growth initiatives.

1. Exposure to Macroeconomic Conditions and Market Cyclicality: Cornerstone Building Brands operates in the construction industry, which is highly sensitive to broader global, national, and regional macroeconomic conditions. Factors such as economic downturns, high interest rates, inflation, and fluctuations in consumer and business confidence can materially and adversely affect the demand for new construction and repair and remodel activities, thereby impacting the company's sales volumes and profitability. The company reported a significant net loss in 2024, partly due to impairment charges sensitive to these macroeconomic and end-market trends.

2. Volatile Raw Material Costs and Supply Chain Disruptions: The company faces exposure to volatile raw material costs, including those for steel, aluminum, and vinyl, which are crucial inputs for its diverse range of exterior building products. While Cornerstone Building Brands has historically been able to pass on some of these cost increases to customers, competitive pricing environments in certain segments can lead to margin volatility. Furthermore, supply chain disruptions can impact production and delivery capabilities, affecting overall operational efficiency and profitability.

3. High Debt Load and Interest Rate Risk: Cornerstone Building Brands carries a substantial amount of long-term debt. As of Q1 2025, its long-term debt stood at $4.824 billion, with over $4.8 billion in future debt payments reported as of December 31, 2024. A significant increase in interest expenses, driven by higher outstanding borrowings and rising interest rates, poses a considerable risk to the company's profitability and financial health, impacting its ability to manage debt effectively.

Cornerstone Building Brands, Inc., which designs, engineers, manufactures, markets, and installs external building products, operates in three segments: Windows, Siding, and Commercial. The addressable markets for their main products and services are as follows:

Windows Segment

• The global windows and doors market was valued at approximately USD 209.99 billion in 2024.
• North America accounted for the largest revenue share of 38.60% of the global windows and doors market in 2024, indicating an addressable market of approximately USD 81.1 billion in North America for windows and doors.
• Specifically, the U.S. windows market was valued at USD 13.8 billion in 2024 and is projected to reach USD 19.8 billion by 2033.

Siding Segment

• The global siding market was valued at approximately USD 125.8 billion in 2024 and is projected to reach around USD 203.9 billion by 2034.
• North America represented 19.0% of the global siding market in 2024, indicating an addressable market of approximately USD 23.9 billion for siding in North America.

Commercial Segment (Metal Building Systems, Metal Roofing and Wall Systems, and Coil Coatings)

• For metal building systems (which include metal roofing and wall systems), the U.S. pre-engineered metal building market was projected to be USD 12.98 billion in 2024 and is expected to grow to USD 27.10 billion by 2033.
• The North America coil coatings market was valued at USD 1.68 billion in 2025.
• Globally, the coil coatings market was valued at USD 6.44 billion in 2025.

Here are 3-5 expected drivers of future revenue growth for Cornerstone Building Brands, Inc. (symbol: CNR) over the next 2-3 years:

1. Strategic Acquisitions: Cornerstone Building Brands has a history of leveraging strategic acquisitions to expand its market presence and product portfolio. Recent examples include the acquisitions of Harvey Building Products and Mueller Supply, which have positively influenced sales performance. The 2021 acquisition of Union Corrugating Company also broadened its metal roof offerings for the residential market.
2. Disciplined Pricing Actions: The company has effectively utilized pricing strategies to navigate market conditions and contribute to revenue growth. This is evident in favorable pricing actions across all segments in 2021 and the ability to offset volume declines with pricing in 2023. This demonstrates an ongoing capability to manage pricing to enhance revenue.
3. Recovery in Residential and Commercial Construction Markets: Cornerstone Building Brands' revenue growth is closely tied to the health of the broader construction industry. The company anticipates a recovery in these markets, expecting to meet demand as market conditions improve and projecting favorable mid-to-long-term growth for the industry. Regulatory and economic factors influencing housing and real estate markets also serve as primary demand drivers.
4. Investments in Innovative Product Offerings: The company has allocated capital expenditures toward developing innovative product offerings. These investments are specifically intended to generate profitable growth in the future, indicating a focus on new and improved products to drive sales.

Capital Allocation Decisions for Cornerstone Building Brands, Inc. (CNR)

Cornerstone Building Brands, Inc., trading under the symbol CNR, underwent a significant capital allocation event by transitioning from a public to a private company in July 2022. This privatization by affiliates of Clayton, Dubilier & Rice (CD&R) profoundly impacted its capital allocation decisions in the last 3-5 years.

Share Repurchases

• The most significant event related to share repurchases was the acquisition of Cornerstone Building Brands by affiliates of Clayton, Dubilier & Rice (CD&R) in July 2022. This all-cash transaction had an enterprise value of approximately $5.8 billion, resulting in public shareholders receiving $24.65 per share and the company becoming privately held.
• Prior to July 2022, no specific company-wide public share repurchase programs with dollar amounts were identified in the available information.

Share Issuance

• As Cornerstone Building Brands became a privately held company in July 2022, there have been no public share issuances since then.

Inbound Investments

• In July 2022, Cornerstone Building Brands was acquired by affiliates of Clayton, Dubilier & Rice (CD&R) in an all-cash transaction with an approximate enterprise value of $5.8 billion. This acquisition made the company privately owned.

Outbound Investments

• In December 2021, Cornerstone Building Brands completed the acquisition of Union Corrugating Company, expanding its offerings in the residential metal roofing market.
• During 2024, the company made strategic acquisitions of Harvey Building Products and Mueller Supply, which contributed to increased sales performance.

Capital Expenditures

• In 2021, capital expenditures for Cornerstone Building Brands were $114.7 million, with approximately 50 percent of this investment directed towards innovative product offerings and process automation.
• Cash used in investing activities increased in 2024, driven by higher capital expenditures and the acquisitions of Harvey and Mueller.
• In December 2025, Cornerstone Building Brands announced a planned investment of $4.9 million to expand its manufacturing campus in Rocky Mount, Virginia, to increase the production of Ply Gem® windows and doors.