Johns Manville is a manufacturer of various construction materials, including insulation, roofing materials, batteries, air filtration products, and much more. Its parent company is Berkshire Hathaway, Warren Buffett’s renowned holding company, though the business predates Berkshire by more than 100 years. The company’s headquarters is in Denver, Colorado, and its current president and CEO is Bob Wamboldt.

Johns Manville was the largest asbestos producer in the country for much of the twentieth century—but eventually, the company made an about-face to focus on producing nontoxic versions of the products traditionally made from asbestos, like insulation and shingles. These days, Johns Manville has renewed its commitment to providing a safe workspace for its employees and safe products for its consumers. It provides its building mate...