Mark Zuckerberg

Meta Platforms CEO Mark Zuckerberg's fortune reached an estimated $220 billion as of late 2025, with Meta posting $134.9 billion in revenue for 2023, driven by advertising across Facebook (billions of monthly active users), Instagram (roughly 2 billion), and WhatsApp. Zuckerberg co-founded Facebook from his Harvard dorm room in 2004 at age 19. His 2023 pivot toward AI infrastructure combined with the Year of Efficiency layoffs, which cut roughly 21,000 jobs, delivered a sharp rebound in profitability and validated the thesis that social platform dominance plus AI-powered ad targeting creates durable advertising economics.