Sam Altman has been reinstated to OpenAI's board after a WilmerHale investigation found his previous firing to be unwarranted. The investigation scrutinized the circumstances surrounding Altman's departure and concluded with his return as CEO. Alongside Altman's reinstatement, OpenAI announced the expansion of its board with three new members: Sue Desmond-Hellmann, former CEO of the Bill and Melinda Gates Foundation; Nicole Seligman, former president of Sony Entertainment; and Fidji Simo, CEO of Instacart. This development comes as part of OpenAI's broader strategy to accelerate its AI development by funding through the sale of shares in a for-profit subsidiary to investors, including Microsoft.