#44: Serena Williams
Along with her sister Venus, Serena Williams is one of the most recognizable faces in women’s tennis. Before her retirement, she was ranked the number one singles player in the world by the Women’s Tennis Association for 319 weeks, and she won 23 Grand Slams.

This success, along with endorsement deals with brands like Gucci, Aston Martin, and Delta Airlines, helped her become the all-time highest-earning female athlete, with a net worth of 250 million USD. Unlike many people on our list, however, she’s sensible with that wealth, telling People magazine that she usually invests her money rather than spending it.