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Who Is Lucy Guo, the Youngest 'Self-Made' Billionaire in New Forbes Ranking?

  • On June 3, 2025, Forbes recognized Lucy Guo, co-founder of Scale AI, as the youngest woman to independently achieve billionaire status, with her fortune estimated at $1.3 billion.
  • In 2014, at the age of 20, Guo left her computer science studies at Carnegie Mellon University after being awarded the $100,000 Thiel Fellowship to focus on building her own business.
  • She co-founded Scale AI with Alexandr Wang in 2016, which shifted from healthcare matchmaking to providing labeled data for AI and now holds a $25 billion valuation.
  • Guo was ousted from Scale in 2018 after strategic disagreements but retained a 5% stake worth about $1.2 billion, while Wang remains CEO and owns 15%.
  • Her recent achievement as a billionaire surpasses Taylor Swift’s previous record as the youngest woman to build her fortune independently, underscoring Guo’s significant influence in the AI industry and startup investment landscape.
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Hello! broke the news in United Kingdom on Wednesday, June 4, 2025.
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