Top 15 Injection Molding Manufacturers in Missouri 2026

C-K Plastics, Inc.

St. Louis, Missouri

C-K Plastics operates from St. Louis, Missouri, where it was founded in 1978.

Four Process, LTD

Valley Park, Missouri

Four Process, LTD was founded in 1974 in St. Louis, Missouri, by Hubert Fox, a U.S.

Koller-Craft Plastic Products

Fenton, Missouri85 employees

Koller Craft Plastic Products, a division of Koller Enterprises, has operated from Fenton, Missouri since 1941 when A.J. Koller Sr.

LeVic Plastics

Grandview, Missouri

LeVic Plastics was founded in 1971 by Leslie "Bill" Stober and Vic Mathis in a garage in Grandview, Missouri, initially focusing on prototype molding for manufacturers. The company incorporated and moved to a dedicated facility in Grandview as demand grew, with Ron Knight becoming a partial owner before taking sole ownership in 1990.

Mission Plastics

Grandview, Missouri

Mission Plastics, headquartered in Grandview, Missouri, has specialized in custom injection molding since 1968. The company is family-owned and operated and operates as part of the Peterson Manufacturing family of businesses, which provides additional vertically integrated capabilities such as metal stamping, PCB manufacturing, and wire harness assembly.

Specialty Plastics Inc.

St Peters, Missouri

Specialty Plastics Inc. was founded in 1980 in St.

LMC Industries was founded in 1945 in Arnold, Missouri, by toolmaker Fred Suellentrop, Sr., who set out to build high-quality equipment that would improve the manufacturability of essential products. The company remains family-owned today, operating from a 240,000-square-foot facility in the St.

The company was formed in 1996 when Modern Plastics Molding (founded 1965 in Independence, Missouri) and Alpha Plastics (a Kansas City molder founded in the early 1960s) merged, combining sixty years of precision injection molding experience. Today the business is led by Anthony C.

PMB Inc.

Poplar Bluff, Missouri

PMB Inc. operates from Poplar Bluff, Missouri, where it was founded in 1998 by Tom Roth, who continues to serve as owner and president.

Quality Custom Molding LLC

Hermann, Missouri

Quality Custom Molding was founded in 2019 in Hermann, Missouri, and has been owned by the Volmer family since its inception. The family-run operation serves customers across the United States and internationally from its Midwestern location.