Elon Musk's last original co-founder at xAI, Ross Nordeen, has reportedly resigned from the company, marking the end of an era for the company as it prepares for a major reorganization ahead of its IPO. Nordeen was a key figure in the firm, reporting directly to Musk and overseeing its operations. He joined the company after working at Tesla to help launch the AI startup in 2023 and had previously led significant layoffs at X following Musk's takeover of the company.