The top 10 US tech billionaires collectively added $550B+ to their combined net worth in 2025, reaching $2.5T by December 24, up from $1.9T at the year's start (Rafe Rosner-Uddin/Financial Times)

Rafe Rosner-Uddin / Financial Times: The top 10 US tech billionaires collectively added $550B+ to their combined net worth in 2025, reaching $2.5T by December 24, up from $1.9T at the year's start  —  Elon Musk stays on top as Nvidia's Jensen Huang powers up the rankings on an AI-fuelled surge in fortunes