6 Great Things Biz Stone Could Do For Twitter By: Benzinga via Benzinga May 18, 2017 at 13:24 PM EDT Twitter Inc (NYSE: TWTR) shares jumped 2 percent after cofounder Biz Stone announced he is returning to work for the company full-time. ... Read More >> Related Stocks: Alphabet-A Alphabet-C Amazon.com Bio-Techne Corp Facebook Twitter, Inc.