"Tweeted" redirects here. For other uses, see Tweet. Twitter, Inc. The default page shown to logged-out users. Type of business Public Type of site News and social networking service Available in Multilingual Traded as NYSE: TWTR S&P 500 component Founded March 21, 2006 ; 12 years ago ( 2006-03-21 ) Headquarters San Francisco, California, United States Coordinates 37°46′36″N 122°25′00″W / 37.7768°N 122.4166°W / 37.7768; -122.4166 Coordinates: 37°46′36″N 122°25′00″W / 37.7768°N 122.4166°W / 37.7768; -122.4166 Area served Worldwide Founder(s) Jack Dorsey Noah Glass Biz Stone Evan Williams Key people Omid R. Kordestani (Executive Chairman) Jack P. Dorsey (Director & CEO) Ned Segal (CFO) Industry Internet Revenue US$ 2.44 billion (2017) Operating income US$ 38.74 million (2017) Net income US$ -108.06 million (2017) Total assets US$ 7.41 billion (2017) Total equity US$ 5.05 billion (2017) Employees 3,372 (2017) Subsidiaries Vine Periscope MoPub Website ...