MGM Transformer Company, was established in 1975 as a dry transformer manufacturer. After the acquisition of Sierra Transformer Company in 1982, MGM introduced liquid units to it's product line. By 1990, MGM Transformer had grown to become the largest independent transformer manufacturer west of the Mississippi. To continue the growth of products within the transformer world, MGM Transformer Company opened a 120,000 square foot satellite manufacturing plant in 1991 for the production of 600V class general purpose lighting transformers. Presently, there are warehouse operations in 20 major cities throughout the continental United States.