Tony Hsieh, the former CEO of shoes and clothes retailer Zappos, has died at age 46. The cause of death was injuries he sustained from a house fire, a spokesperson told TechCrunch. After 20 years with the company, he had announced his retirement in late August. Zappos' current CEO, Kedar Deshpande, called Hsieh a "tremendous visionary and an incredible human being." Visit Business Insider's homepage for more stories.