When Whitney Wolfe Herd created a female-focused dating app (Bumble)–which allows women to make the first move in an online relationship–her start-up became a global hit. At 31, Herd is both the youngest female CEO of a public US company and  a female self-made billionaire.

Herd began working with online dating apps at Tinder, helping build the company and serving as its vice president for two years. 

She left Tinder to create her own company in 2014.  Bumble now has 100 million users worldwide. After 6 years of rapid growth, Wolfe Herd led Bumble through its initial public offering on February 10th. Upon going public, the company’s shares surged 70% from their $43 offering price on the first day of trading. This put the company’s valuation over $8 billion dollars. 

Bumble is available in 150 countries, and 72 percent of Bumble users are under 35.