Serena Williams — The Venture Capital Athlete

Serena earned $94 million in prize money — the highest in women's tennis history. Then she launched Serena Ventures, a VC firm that has invested in over 80 companies including MasterClass, Impossible Foods, and Noom. The fund has a reported value north of $100 million. She also built the S by Serena fashion line and signed a lifetime Nike deal. Her total estimated worth: $340 million. Williams didn't just fight for equal prize money in tennis — she proved that a female athlete could build a post-career financial empire to rival any male counterpart.