You may have been surprised a few years ago when Google acquired traffic app Waze or Facebook paid more than $21 billion for messaging service Whatsapp. We weren't. This year marks the fourth year of the CNBC Disruptor 50, and in that short history a lot has changed for these companies. Ten past Disruptors are now public companies; 12 have been acquired; three of the previous Disruptors went the way of many start-ups, shutting down, including one courtesy of a landmark U.S. Supreme Court decision. Eight companies have made the Disruptor list all four years. Below is the complete history of the CNBC Disruptor 50, with details on every start-up to make the list between 2013 and 2016.