https://www.reuters.com/article/us-coinbase-global-stocks-ceo/coinbase-chief-executive-armstrong-sold-291-8-million-in-shares-on-opening-day-idUSKBN2C600P >Coinbase Chief Executive Brian Armstrong sold about $292 million in shares in total during the cryptocurrency exchange's first day of trading on the Nasdaq in the past week, according to regulatory filings.