OpenAI has constituted a new board after the return of ex-CEO, Sam Altman as the CEO of the AI startup.

Former Salesforce co-CEO Bret Taylor, former Treasury Secretary and Harvard University president Larry Summers, and Quora CEO Adam D’Angelo make up the new board. D’Angelo was formerly a member of the OpenAI board of directors.

The chief scientist of OpenAI, Ilya Sutskever, tech entrepreneur Tasha McCauley, and Helen Toner, the director of strategy and foundational research grants at Georgetown’s Centre for Security and Emerging Technology, are the three directors who are no longer on the board.

The sudden change in leadership at OpenAI follows Microsoft CEO Satya Nadella’s announcement on November 19 that the company had hired Altman and Greg Brockman who resigned from OpenAI after Altman was fired to head a new AI research team at Microsoft.

The agreement for Altman to return as OpenAI’s chief executive officer also comes after nearly every employee of the company signed a letter threatening to leave and join Microsoft unless the board resigned and reinstated Altman and Brockman.

Microsoft is a significant investor in OpenAI. The company has been a backer of the company since its emergence.