John Legere

President and CEO, T-Mobile

CEO John Legere has led T-Mobile's public transformation with candid, bad boy force. He unleashed a profanity-laced diatribe against the wireless industry, railing against practices such as locking customers into a contract, included a press release that compared the wireless giant to Darth Vader and included fake quotes from AT&T's CEO. Still, In the six months that followed Legere's diatribe, T-Mobile added 1.4 million long-term subscribers, more than AT&T and Sprint. From May to December of 2014, its market value increased by more than 100%.