Two of Musk's private companies are poised to achieve a multibillion-dollar valuation jump through new deals as investors race to back the world's richest man's vast business interests, according to the Financial Times. SpaceX, the largest private company in the United States, is preparing to launch a takeover offer in December that will sell its existing stake at about $135 per share, according to people familiar with the matter. That would value the rocket maker at more than $250 billion, up from about $210 billion in a similar deal earlier this year. Meanwhile, people familiar with the matter revealed that Musk's artificial intelligence startup xAI has raised $5 billion, valuing it at $45 billion, nearly double its valuation a few months ago. Musk and his investors just started discussions last month, so the financing has proceeded at breakneck speed.