
AI Builders Rule: The 10 Youngest US Billionaires Under 40
Forbes’ annual America’s 400 richest list includes 10 people under 40, the most ever, with wealth ranging from about $5.8B to $44.4B. Seven are self-made AI founders spanning Anthropic, Surge AI, OpenAI, and Cognition (Tom Brown, Daniela Amodei, Greg Brockman, Jack Clark, Sam McCandlish, Steven Hao, Edwin Chen), while Lukas Walton inherited his fortune. Non-AI tech figures also appear, including Vlad Tenev of Robinhood and Palmer Luckey of Anduril. Steven Hao is the youngest at 30, and the group is largely California-based, with Walton in Illinois and Chen in New York. The piece highlights AI’s outsized role in creating the newest generation of wealth.













