WST

West Pharmaceutical Services, Inc.

A maker of the rubber stoppers, syringe plungers, and other packaging that keep injectable medicines sterile and safe, West Pharmaceutical Services supplies drugmakers around the world with products like its NovaPure and FluroTec lines. The company was founded in 1923 in Philadelphia by Herman O. West, who started out making rubber grinding wheels for dentists before pivoting to pharmaceutical closures. During World War II, West's rubber stoppers helped mass-distribute penicillin and insulin, and the company still carries its founder's name today.