Get Stock Quote Here Core Molding Technologies, Inc. (CMT) was founded in 1988 (original name is Core Materials Corporation) and now based in Columbus, Ohio. The company manufactures sheet molding compounds (SMC), and molds fiberglass reinforced plastics. It occupies over 1,000,000 square feet of manufacturing space and its mainly subsidiaries are in Matamoros, Mexico, Gaffney, South Carolina, and Cincinnati, Ohio. In 2011, Core Molding Technologies formed Core Specialty Composites, LLC.