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The Glass & Stoppers — GLP-1 Pen Packaging · The GLP-1 & Bio Supply Chain — Peptides, Bioprocessing & Diagnostics

WST

West Pharmaceutical Services
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Near-monopoly in rubber stoppers/elastomers for biologics. Every GLP-1 pen needs one.

What they do

Near-monopoly position in rubber stoppers and elastomers for biologics. Every Wegovy, every Mounjaro, every monoclonal antibody is sealed by a West stopper. The most boring, most durable name in this entire sector. Lower beta than Stevanato.