Interoil, which was the fourth largest shareholder in the Philip Fjeld-led company, has sold its entire 7.1% stake at NOK5.5 per share.
That equates to a return of just over NOK 491m ($80m) on trading volume around eight times higher than seen during the previous day on the Oslo Stock Exchange.
Shares in Flex LNG have more than doubled in price from NOK 2.74
