Sam Altman, former CEO of OpenAI, returns to headquarters for discussions after sudden removal.

Former OpenAI CEO Sam Altman made a surprise appearance at the company’s headquarters following reports that investors were pushing to reinstate him just one day after he was ousted by the board. Altman, who founded the company, posted a photo of himself wearing an OpenAI visitor badge on social media, with OpenAI’s chief strategy officer also sharing a photo of Sam with the badge. This comes after a large group of OpenAI employees, including executives, expressed support for Altman on social media. Investors, including Microsoft, Sequoia Capital, Tiger Global, and venture firm Thrive Capital, are reportedly part of an effort to reinstate Altman or have been in discussions with him. The discussions have evolved into media reports that Altman may return to the company, along with OpenAI president Greg Brockman, who quit Friday after news of Altman’s departure. CNBC’s Rohan Goswami and Jordan Novet contributed to this report.