Apple Reclaims Title of World's Most Valuable Company, Overtaking Nvidia. Golden Finance reports that on October 31st, Apple regained its title as the world's most valuable company, dethroning Nvidia. Amid concerns about artificial intelligence spending, investors sought the relative security offered by the iPhone maker. Apple's stock fell 1.2% on Friday, reducing its market capitalization to $5.03 trillion; Nvidia fell 4.2%, closing with a market capitalization of $4.93 trillion. This marks the first time Apple has surpassed Nvidia since briefly overtaking it at the end of July.