Airbnb CEO Brian Chesky has transformed the couch-surfing service he cofounded in 2007 into a home rental giant that has radically remade the travel industry. The company’s popularity, ...

The 33-year old Chesky, who shares the No. 1 spot with Uber founder Travis Kalanick on Fortune's 40 under 40 list this year, still has some legal hurdles to overcome.