The list of the world's 50 most valuable companies in 2025 is led by Microsoft, Apple, and Nvidia, with the United States having the highest representation at 32 companies, followed by China with five. Among these top companies, Microsoft has seen a 4.1% increase in stock value this year, while Apple and Nvidia have experienced declines of 20.7% and 13.1%, respectively. Other notable performances include Amazon down 12%, Google down 19.3%, Facebook up 1.2%, Berkshire Hathaway up 13.3%, Broadcom down 10.2%, and Tesla down 26.1%. In the Nasdaq 100, the worst-performing stocks of the year include The Trade Desk down 49%, Marvell Technology down 48%, On Semiconductor down 37%, Tesla down 29%, and Lululemon down 26%.