Santander has issued a $20 million bond on ethereum, and paid fiat cash for it on the public blockchain as well.
Source: https://www.coindesk.com/santander-settles-both-sides-of-a-20-million-bond-trade-on-ethereum
Santander Settles Both Sides of a $20 Million Bond Trade on Ethereum
September 12, 2019
CoinDesk
