Who sells to McKesson

12 listed companies name McKesson as a customer behind 10% or more of their revenue, led by Rigel Pharmaceuticals at 42%.

Each share is of the supplier’s own revenue: how much of its business McKesson is. McKesson's own customers and margins

A US company has to name every customer behind 10% or more of its revenue in its annual report. This page lists the listed companies whose latest 10-K, 20-F or 40-F names McKesson that way. Suppliers below the 10% line, private suppliers and suppliers that keep the customer anonymous do not appear. Who depends on whom has the same disclosures across every company.