Information about a company's suppliers and customers is not consistently available, but it may be tracked in the following resources:

• S&P Capital IQ (see access details) - company profiles include suppliers, customers and strategic alliances under Business Relationships in the left-hand menu.
• CB Insights - also includes Business Relationships  on company profiles. Categories include: client, distributor, licensee, licensor, partner, sponsor, sponsored, vendor,
• LSEG Workspace - use the value chains command to identify customers and suppliers; enter the desired ticker symbol followed by VCHAINS.
• Bloomberg (see access details) has data on a company's suppliers and customers.
  • Use the SPLC function for a specific company -- e.g., to find Merck's suppliers, customers, and peers you'd type: MRK <Equity> SPLC <GO>.
• Factset Revere - available via WRDS (see access details). Use the Relationships subset.

Use ABI/INFORM Global and Business Source Complete for articles from trade publications which may mention a company's supply chain.

• Try searching for supply chain AND [your company's name].