Elon Musk's artificial intelligence group buys X for $45bn / In a surprise deal, Musk sells X to his AI company / Elon Musk's AI company just bought X / xAI, Elon Musk's AI company, just purchased X, Elon Musk's social media company / Elon Musk sells X platform to his xAI company / Elon Musk Has Been Buying Up X Shares Near His Initial Purchase Price / Xero shares hit record high after 76% profit jump / Elon Musk says X staff can get their stock -- if they prove they deserve it / X ramps up new advertising strategy following Musk's tirade