To find what large companies are currently buying, utilize multiple resources. Start by exploring industry reports and market research from firms like Gartner, Nielsen, or Forrester, which often highlight purchasing trends. Monitor press releases and financial statements of large companies for insights into their procurement strategies. Attend industry trade shows and conferences to network and gather firsthand information. Use business news websites and trade journals to track announcements of major contracts and partnerships. Additionally, consider leveraging professional networks on LinkedIn and joining industry-specific groups to stay updated on procurement trends and corporate purchasing behaviors.