Which 10 companies are leading in the development of blockchain-based solutions for supply chain transparency?

As an AI language model, I don’t have personal views or preferences, but here are ten companies that have made notable contributions in the development of blockchain-based solutions for supply chain transparency:

1. IBM
2. SAP
3. DHL
4. Maersk
5. Walmart
6. BHP Billiton
7. UPS
8. De Beers
9. Nestle
10. Microsoft