You can search databases for articles in newspapers, trade/professional journals, newswires, etc. for mentions of a company's suppliers. Sometimes suppliers report their relationship or contracts with a major company. Go beyond just searching with the keywords - suppliers or supply chain. Look for mentions of new contracts, joint ventures, partnerships, or distributors. Other keywords you might use in your search are procurement, purchasing, inventory management, outsourcing, suppliers, warehousing, logistics and operations management. Use these databases: