OpenAI employees are threatening to quit unless the board resigns and reinstates Sam Altman as CEO and ex-president Greg Brockman.

According to Bloomberg, by Monday afternoon, the number of signatories had risen to more than 700. That’s almost all of the company’s approximately 770 employees. Several employees wrote on social media X that “OpenAI is nothing without its people.”

Altman was fired from OpenAI on Friday after the board said it was “no longer confident in his ability to continue to lead OpenAI.” Now, Sam Altman and Greg Brockman will join Microsoft’s new cutting-edge AI research team.

Altman was hired by Microsoft just hours after being fired from OpenAI.