M&M Manufacturing

M&M Manufacturing is one of the country's largest producers of sheet metal products, primarily servicing the air distribution and ventilation market. M&M provides a comprehensive range of round, rectangular, oval and spiral ductwork, fittings and accessories for residential and commercial construction. MiTek is a subsidiary of Warren Buffett's Berkshire Hathaway, Inc.. M&M was founded by the Stepp family of Fort Worth, Texas in 1958. From humble beginnings as a small sheet metal shop, the company has grown to become one of the largest HVAC ductwork and product manufacturers in the United States, with 6 manufacturing facilities producing more than 9,000 different products and employing nearly 800 team members.