Feb 16 (Reuters) - Riot Blockchain Inc RIOT.O :
* RIOT BLOCKCHAIN PROVIDES SHAREHOLDER UPDATE
* RIOT BLOCKCHAIN'S CEO JOHN O'ROURKE SAYS "AT END OF 2017, I PERSONALLY SOLD SOME STOCK THAT I HELD IN OUR COMPANY"
* RIOT BLOCKCHAIN'S CEO JOHN O'ROURKE SAYS "I SOLD LESS THAN 10% OF MY OVERALL POSITION AND DID SO TO COVER TAX OBLIGATIONS"