Yes, Johns Manville is a big company in building products industry, with significant global presence, revenue, and employment, though not as large as some conglomerates. Johns Manville has annual revenue around 3 to 4 billion dollars as of recent years, with 2023 estimated at 3.5 billion, making it major player in insulation and roofing market, competing with Owens Corning and CertainTeed. It has about 7,000 to 8,000 employees worldwide and operates approximately 40 to 45 manufacturing plants across North America, Europe, and Asia, producing fiberglass insulation, mineral wool, commercial roofing membranes like TPO and EPDM, and engineered products like glass fibers and filtration media. It is headquartered in Denver, Colorado, and owned by Berkshire Hathaway since 2001, which is one of largest conglomerates in world with market capitalization over 700 billion, giving Johns Manville financial backing and stability. Historically, Johns Manville was Fortune 500 company and largest asbestos manufacturer in US, with sales over 2 billion in 1970s, and after bankruptcy reorganization in 1988, it rebuilt as major insulation leader. Compared to global building materials giants like Saint-Gobain with revenue over 50 billion, Johns Manville is mid-sized big, but within insulation and roofing segment, it is one of largest in North America, with products sold at Home Depot, Lowes, and through contractors across US and Canada, including plant in Innisfail, Alberta. So yes, big company.
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