The richest person in the world as of September 2025 is Elon Musk, with a net worth reported around $415 billion according to some sources. However, Larry Ellison, co-founder of Oracle, briefly surpassed Musk's wealth during a surge in Oracle's stock price to about $393 billion before Musk regained the top spot. The wealth rankings can fluctuate daily due to stock market changes and company performances, especially in tech and AI sectors. Musk has held the position for much of the past few years, but Ellison is a close contender driven by Oracle's growth in cloud infrastructure and AI.