On August 17, 2023, Cornerstone Building Brands, Inc. (Cornerstone Building Brands) completed its indirect acquisition of all the issued and outstanding shares of MAC Metal Architectural Inc. (MAC Metal) for an undisclosed amount. Cornerstone Building Brands is the largest manufacturer of exterior building products in North America. Built for residential and low-rise non-residential buildings, their market-leading portfolio of products spans vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems and metal accessories. Quebec-based MAC Metal serves the North American residential and commercial markets with high-end steel siding and roofing products manufactured entirely in Canada.