Bill Gates and Steve Ballmer.
Elaine Thompson/AP
- Bill Gates' former assistant is now wealthier than his old boss for the first time.
- Steve Ballmer, who succeeded Gates as Microsoft CEO, is worth an estimated $157 billion.
- Microsoft stock has surged amid a broader AI boom, boosting Ballmer's net worth.
A former assistant to Bill Gates has scaled the ranks of the world's wealthiest people to become richer than his old boss for the first time.
Steve Ballmer's...