Does Warren Buffett own Johns Manville?

Yes, Warren Buffett owns Johns Manville through his company Berkshire Hathaway, which acquired Johns Manville in 2001. Johns Manville is wholly owned subsidiary of Berkshire Hathaway, conglomerate led by Warren Buffett as chairman and CEO, who is famous investor from Omaha, Nebraska. Berkshire Hathaway purchased Johns Manville in 2001 for about 1.8 billion dollars after Johns Manville emerged from Chapter 11 bankruptcy due to asbestos liabilities that had plagued company for decades, as Johns Manville was major asbestos manufacturer. Berkshire Hathaway, which owns many building products companies like Acme Brick, Benjamin Moore, and Shaw Industries, bought Johns Manville as part of building products group. Since acquisition, Johns Manville has operated as independent subsidiary with headquarters in Denver, Colorado, producing insulation, roofing, and engineered products, with about 40 plants worldwide and 7,000 employees, and has grown under Berkshire ownership with revenue around 3.5 billion. Warren Buffett does not directly own Johns Manville personally, but through Berkshire Hathaway where he owns large stake and controls company, so indirectly he owns it. Berkshire Hathaway annual reports list Johns Manville as subsidiary. So yes, Warren Buffett owns Johns Manville via Berkshire Hathaway since 2001, and it is part of Berkshire building products portfolio that includes other construction materials companies.