Timeline of Twitter By edelbeer 2006 Twitter launches Period: 2007 to 2008 CEO Jack Dorsey introduces hashtags Period: 2008 to 2010 Rapid growth May 12, 2009 First tweet from space Nov 7, 2013 Twitter is listed on the NYSE Period: 2014 to 2022 Moving away from feed to new interface Apr 25, 2022 Elon Musk buys Twitter for $44B