To find out what large companies are currently buying, you can use a variety of strategies and resources:

Research Strategies:

1. Industry Reports and Market Research:
- Market Research Firms: Companies like Gartner, Forrester, and IBISWorld provide detailed reports on industry trends and procurement needs.
- Trade Publications: Subscribe to industry-specific magazines and journals that often highlight current buying trends and needs.

2. Public Procurement Databases:
- Government Contracts: Many large companies bid for government contracts, and the details of these contracts are often publicly available. Websites like the Federal Procurement Data System (FPDS) in the U.S. can provide insights.
- Corporate Filings: Publicly traded companies disclose procurement details in their quarterly and annual reports (10-Q and 10-K filings).

3. Networking and Industry Events:
- Trade Shows and Expos: Attend industry-specific trade shows, expos, and conferences where companies often discuss their procurement needs.
- Industry Associations: Join industry associations and attend their meetings and networking events.

4. Online Marketplaces and Platforms:
- B2B Marketplaces: Platforms like Alibaba, ThomasNet, and GlobalSources can provide insights into what products companies are sourcing.
- Supply Chain Platforms: Websites like SupplyChainBrain and Procurement Leaders offer articles and insights into corporate procurement trends.

5. Direct Outreach and Surveys:
- Cold Emails and Calls: Reach out directly to procurement departments of large companies to inquire about their current needs.
- Surveys: Conduct surveys targeting procurement professionals to gather data on current buying trends.

Verification and Quality Assurance:

1. Independent Verification Agents:
- Hire independent agents or firms specializing in quality control and sourcing inspections. Companies like SGS, Bureau Veritas, and Intertek offer these services.

2. Product Samples and Certifications:
- Request samples and quality certifications from suppliers on platforms like Alibaba.
- Ensure products meet international standards and certifications relevant to your target industry (e.g., ISO, CE, FDA).

Building Trust and Reliability:

1. Professional Website and Branding:
- Create a professional website that highlights your commitment to quality and customer satisfaction.
- Showcase testimonials, case studies, and any relevant certifications or partnerships.

2. Consulting Services:
- Hire consultants with experience in corporate procurement and supply chain management to guide you on best practices for building trust and credibility.

3. Value-Added Services:
- Offer value-added services such as customized packaging, reliable logistics, and after-sales support to differentiate yourself from competitors.

By leveraging these strategies, you can identify what large companies are currently buying and position yourself as a reliable supplier of high-quality products.