Happy 25th birthday, CNBC! By: CNBC.com News April 16, 2014 at 15:56 PM EDT CNBC turns 25 on Thursday, April 17, 2014. A look back: From the early days in 1989 to the present. Here's a brief history of CNBC. Read More >> Related Stocks: Discovery Comm B Discovery Communications Sentinelone Inc Cl A Twitter, Inc.