Security Envelope Co, 2645 SE 4th St, Minneapolis, MN 55414, US

MackayMitchell Envelope Company supplies envelopes. The company serves more than 1,000 customers, including many Fortune 500 corporations, as well as small and emerging companies. Its customers represent a broad spectrum of industries, including banking, insurance, manufacturing, retailing, investment brokers, utility companies, advertising, publishing, medical and dental professions, state and local government agencies. MackayMitchell's product line includes a variety of styles and sizes of general-purpose envelopes, with lithographic printing in up to four colors. The company also offers specialized envelopes for the direct mail industry, publishers' renewal programs, cycle statement billings and the photo finishing industry. Established in 1959, MackayMitchell produces more than 4 billion envelopes a year. It is headquartered in Minneapolis.