Forbes’ billionaires index pegged Musk’s wealth at $500.1 billion as of 4:15 p.m. Musk’s wealth is tied largely to Tesla, where he held a 12.4 percent stake as of mid-September. Tesla shares have climbed more than 14 percent this year, including a 3.3 percent gain that added over $6 billion to Musk’s personal fortune. Tesla board chair Robyn Denholm said in September that Musk was once again “front and center” at the company. Reports in September suggested xAI could seek to raise funds at a valuation of $200 billion, though Musk has publicly denied any current fundraising.