Deepening its involvement with blockchain technology, Walmart has joined MediLedger, which uses an enterprise version of the Ethereum blockchain to track the provenance of pharmaceuticals. Given that Walmart already utilizes IBM's Food Trust, it is not too surprising that the retailer also wants to support its pharmacy business, which accounts for 10% of its US sales. Walmart has been filing cryptocurrency- and blockchain-related patents since late 2017, indicating that it has only recently set its eyes on this sector and is likely to continue investing in both its own IP for managing inventory and third party blockchain companies for other matters.