On the first day of its listing, Ultraman's nuclear fission company suffered a painful "halving". "ChatGPT's father" Ultraman is now the chairman of a listed company, but this company is not OpenAI. The experience of its subsidiary's first day of listing was obviously not very wonderful for Ultraman... It is reported that nuclear fission startup Oklo officially began trading on the New York Stock Exchange on Friday, with the stock code OKLO. This company, which has not yet generated any revenue, is chaired by OpenAI CEO Ultraman and was listed through a special purpose acquisition company (SPAC) called AltC Acquisition Corp. However, despite the top tier label of "AI data center+nuclear fission", the stock's performance on its first day of listing encountered a Waterloo - Oklo plummeted 54% on Friday to $8.45 per share.