West Pharmaceutical WST

HealthcareMarket cap $15B4 connections

West Pharmaceutical makes the rubber stoppers, vial closures, and delivery components for injectable drugs and vaccines. Every single vaccine vial, insulin cartridge, and biologic drug uses West's containment components. No injectable drug reaches patients without West's packaging.

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Customers 4

Companies West Pharmaceutical sells to

Eli LillyHealthcare · $700BWest delivery pens for Eli Lilly GLP-1 drugs
MerckHealthcare · $290BWest packaging for Merck biologic drugs
PfizerHealthcare · $160BWest stoppers in every Pfizer injectable vial
ModernaHealthcare · $45BWest vial closures for Moderna mRNA vaccines

Other Healthcare companies

Eli Lilly UnitedHealth Novo Nordisk Johnson & Johnson AbbVie Merck AstraZeneca Thermo Fisher Novartis Abbott Labs

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Relationships are compiled by VexMap from company filings, announcements and reporting, and last reviewed September 2026. Spotted something wrong? Tell us. Not investment advice.