Microsoft had an approval right on some transactions. It did not have the majority of the board. That’s even though they contributed more than 90 percent of OpenAI’s initial investments. Also, all LPs had major decision rights, Wetter testifies. So this is less control than Musk wanted for more money.

Elon Musk named Microsoft as a defendant in his lawsuit against OpenAI

Landmark trial could shape future and leadership of OpenAI as company prepares for possible initial public offering.