XO Windows, L.L.C.

XO Windows, L. L. C. , based in the US, specializes in high-quality windows and doors, offering innovative solutions designed to enhance energy efficiency and aesthetic appeal for residential and commercial properties in the Southwestern United States.

Founded in 2008 and headquartered in Phoenix, US, XO Windows, L. L. C. focuses on providing customized window and door solutions.

The company has successfully navigated its market since inception, with no significant pivots in its strategy. In January 2026, US LBM Holdings, LLC acquired XO Windows, further positioning it to expand its customer base. XO Windows specializes in high-quality windows and doors tailored to meet diverse architectural and design preferences, primarily serving customers in the Southwestern United States. Their core offerings include the MI EnergyCore™ Energy Efficient Window System and various vinyl and aluminum window options designed to enhance energy efficiency and aesthetic appeal.

These products address common challenges such as thermal insulation, sound reduction, and solar heat gain, ensuring comfort and sustainability for residential and commercial properties. The company caters to a wide range of clients, including homeowners, builders, and contractors, providing solutions that meet specific needs, such as custom sizes and unique shapes for non-standard openings. XO Windows is positioned as one of the largest distributors in the Southwest, effectively serving markets that require durable and stylish window and door solutions. XO Windows generates revenue through direct sales of its window and door products, utilizing a B2B model that targets both residential clients and commercial contractors.

Typical transactions involve customized orders, where clients select specific products based on their architectural requirements. The pricing structure includes a range of options for flagship products like the EnergyCore™ Window System and various sliding glass doors. Customers may engage with the company through direct consultations or by filling out service request forms for window installations and repairs. The business leverages partnerships with builders and distributors to broaden its market reach, ensuring that it effectively addresses the needs of its client base while maintaining a commitment to quality craftsmanship and service.

With the recent acquisition by US LBM Holdings, LLC in December 2025, XO Windows plans to leverage its new parent company's resources to enhance its product offerings and expand into additional markets. They are focusing on developing new energy-efficient products to meet rising demand and are targeting further expansion beyond the Southwestern United States by 2027. This strategy aims to broaden their customer base and solidify their market presence.