Sam Altman, the former CEO of OpenAI, will not be returning to the company despite efforts from executives to bring him back. The interim CEO will now be Emmett Shear, the ex-Twitch boss. Altman is reportedly discussing a possible return to OpenAI to work on improving the company's governance structure, while also considering launching a new AI venture. Microsoft, OpenAI's biggest backer, is also considering taking a role on the board. The sudden management upheaval has raised concerns among employees about the impact on an upcoming $86 billion share sale.