WST vs ZTO Comparison

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.

ZTO Express is China's largest express delivery company by parcel volume, with a volume share of 19.4% in 2024. It operates a network partner model where it provides line-haul transportation and sorting services, while its local network partners provide first-mile pickup and last-mile delivery services under the ZTO brand name. Headquartered in Shanghai, the company was founded in 2002 by Meisong Lai, who remains chair, CEO, and its major shareholder with 78% voting rights as of March 31, 2025. ZTO's strategic shareholder is leading China e-commerce company Alibaba Group with around an 8.9% interest.