David P. Feldker

Sigma-Aldrich Corp. operates as a life science and technology material company. It develops, manufactures, purchases and distributes a broad range of biochemical and organic chemicals. Its services include basic research, product and process development, manufacturing and production, regulatory compliance, and facility operations. was founded in May 1975 and is headquartered in St. Louis, MO.

Reliable Biopharmaceutical Corp. manufactures and develops pharmaceutical ingredients. It offers products in various categories, including active product ingredients, nucleic acid chemistry, enzymes and natural products, carbohydrate chemistry and ultra pure biochemicals. Its products are used in generic injectable drugs which treat cancer, heart diseases, hypertension, anxiety and other serious and life threatening illnesses. The company was founded by Robert S. Vaters and William G. Ash in 1968 and is headquartered in St. Louis, MO.