A company catering to women and led by women has made its 31-year-old female founder a billionaire. Bumble Inc., the owner of the dating app where women make the first move, sold shares in its upcoming trading debut at $43, valuing Chief Executive Officer Whitney Wolfe Herd’s stake at more than $900 million and lifting her overall fortune above $1 billion. The listing caps a saga that’s both inspiration and cautionary tale for women tech founders. Wolfe Herd capitalized on an underserved market and built a multibillion-dollar company that was in a sense born from one of the most vexing obstacles to women entrepreneurs: sexual harassment. “This is a huge win,” said Allyson Kapin, general partner at investment firm W Fund and founder of the Women Who Tech network. “Whitney saw an opportunity that wasn’t being addressed for women and based on her expertise she’s made it into this gold mine, not just for her and her team but also her investors.” Bumble’s IPO launches Wolfe Herd into a rarefied club of self-made female billionaires. While women make up about half of the global population, self-made women — mostly from Asia — account for less than 5% of the world’s 500 biggest fortunes, according to the Bloomberg Billionaires Index. Self-made men comprise almost two-thirds of the wealth index.