This tech co-founder quietly overtook Taylor Swift as the youngest self-made woman billionaire on Earth

Lucy Guo has officially entered the exclusive billionaire club, becoming the youngest self-made woman billionaire at the age of 30, surpassing Taylor Swift. According to , the milestone comes as her former company, Scale AI, nears the completion of a tender offer slated for June 1. The deal enables early employees and investors to sell shares and values the nine-year-old firm at a staggering $25 billion—a remarkable 80% increase from its $13.8 billion valuation just last May. Lucy Guo, 30,