West Pharmaceutical WST

HealthcareMarket cap $26B4 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 · $1.1TWest delivery pens for Eli Lilly GLP-1 drugs
MerckHealthcare · $367BWest packaging for Merck biologic drugs
PfizerHealthcare · $163BWest stoppers in every Pfizer injectable vial
ModernaHealthcare · $79BWest vial closures for Moderna mRNA vaccines

Other Healthcare companies

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

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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.