Is xAI publicly listed?

I'm curious to know, is xAI a publicly traded company? Are its shares available for investors to buy and sell on the open market? I understand that many startups and tech companies opt to remain private for various reasons, but I'm wondering if xAI has taken the step to go public and offer its stock to the broader public. If so, that would suggest a certain level of maturity and financial stability within the company, which could be appealing to potential investors.