11 billion-dollar start-ups the world has on an IPO clock By: CNBC.com News May 18, 2017 at 09:08 AM EDT Billion-dollar start-ups make the CNBC Disruptor 50 list every year. Here's a look at those posturing for an IPO — and those biding their time. Read More >> Related Stocks: Alphabet-A Box Inc Renaissance IPO ETF