This article is about the social networking service . For the type of directory, see face book . Facebook, Inc. Facebook login/signup screen Type Public Traded as NASDAQ : FB NASDAQ-100 Component S&P 500 Component Founded February 4, 2004 ; 12 years ago Headquarters Menlo Park, California , U.S. Coordinates 37.4848°N 122.1484°W Area served United States (2004–05) Worldwide, except blocking countries (2005–present) Founder(s) Mark Zuckerberg Eduardo Saverin Andrew McCollum Dustin Moskovitz Chris Hughes Key people Mark Zuckerberg ( Chairman and CEO ) Sheryl Sandberg ( COO ) Industry Internet Revenue US$ 17.928 billion (2015) [1] Operating income US$6.225 billion (2015) [1] Net income US$3.688 billion (2015) [1] Total assets US$49.407 billion (2015) [1] Total equity US$44.218 billion (2015) [1] Owner Mark Zuckerberg (53%) [2] Employees 12,691 (2015) [3] Subsidiaries Instagram WhatsApp Oculus VR PrivateCore Written in