West Pharmaceutical Services Inc. WST

What this company does

West Pharmaceutical Services manufactures containment and delivery systems for injectable drugs and healthcare products. Its products include primary proprietary packaging, containment solutions, reconstitution and transfer systems, and drug delivery systems, as well as contract manufacturing, analytical lab services and integrated solutions. Its customers include biologic, generic, pharmaceutical, diagnostic, and medical device companies. As of December 31, 2025, it employed approximately 10,800 people, excluding contractors and temporary workers, in its operations throughout the world. Its ten largest customers accounted for 47.6% of its consolidated net sales in 2025, and one of those customers individually accounted for more than 10% of consolidated net sales, at 15.8%, or $485.9 million. Its business operations are organized into two global business segments, Proprietary Products and Contract-Manufactured Products. The Proprietary Products segment offers elastomers and primary containment, drug delivery devices, integrated systems, and analytical lab services, primarily to biologic, generic, and pharmaceutical drug customers. The Contract-Manufactured Products segment is focused on the design, manufacture, and automated assembly of complex devices, primarily for pharmaceutical, diagnostic, and medical device customers.

Written from the business description in WEST PHARMACEUTICAL SERVICES, INC.'s annual report to the U.S. Securities and Exchange Commission, filed 17 February 2026. Every sentence was checked against that document before publication.