ON vs WST Comparison

Onsemi is a supplier of power semiconductors and sensors focused on the automotive and industrial markets. Onsemi is the second-largest power chipmaker in the world and one of the largest suppliers of image sensors to the automotive market. Its chips sell into vehicle drivetrains, automotive safety systems, energy infrastructure, industrial automation, and data centers. Onsemi manufactures most of its products in-house, vertically integrated from design to production. Its sales are split between direct and distribution, and it holds a global manufacturing and customer footprint.

West Pharmaceutical Services is based in Pennsylvania and is a key supplier to firms in the pharmaceutical, biotechnology, and generic drug industries. West sells elastomer-based packaging components (including stoppers, seals, and plungers), nonglass containment solutions, and auto-injectors for injectable drugs, which include large-molecule biologics, peptides such as GLP-1 receptor agonists, and small-molecule drugs. The company reports in two segments: proprietary products (about 80% of total revenue) and contract-manufactured products (about 20% of total revenue). It generates approximately 55% of its revenue from international markets and 45% from the United States.