https://www.theguardian.com/technology/2018/aug/08/tesla-directors-elon-musk-private-twitter-shares

Statement from board members suggests Musk’s tweets – which prompted surge in price – were less spontaneous than imagined

Tesla directors have said they knew about Elon Musk’s surprise proposal to privatise the money-losing car maker before he tweeted about it and have met several times in the past week to discuss the proposal.