Nvidia’s board of directors removed Jensen Huang from his position as CEO. Colette Kress will temporarily serve as the company’s chief executive. In premarket trading, NVIDIA shares fell 10% in response.

Huang’s career began with washing dishes and cleaning toilets, and by the age of 30 he was at the helm of one of the world’s most valuable companies. When he was just 17, he promised his future wife he would become CEO by the age of 30—and he kept that promise. He led Nvidia for 33 years, from the company’s founding in 1993. Over those decades, the billionaire got an Nvidia logo tattoo, worked without taking days off, and personally oversaw the work of 60 senior executives.