A 25-year-old college dropout who has inked deals with the U.S. military to help them harness artificial intelligence is now reportedly the world’s youngest self-made billionaire. Alexandr Wang, who appeared on the Forbes’ 30 Under 30 list in 2018, is co-founder and chief executive officer at Scale, a San Francisco-based startup that helps companies generate high-quality data for AI applications. Last April, a $325 million funding round doubled Scale’s valuation to $7.3 billion in just over four months.