Date of Birth: 
About Mark D. Kingdon
- Mark Kingdon is an American angel investor.
- He has invested in companies such as Twitter, SAY Media, Kidzui, 140 Proof, NiftyThrifty, and Fab.com.
- Previously, he spent two years as CEO of Linden Lab, having served from May 2008 to June 2010.Prior to that, Kingdon was CEO of Organic Inc, a digital marketing agency, from 2001-2008.
- He led the company immediately following its 2000 IPO, through privatization and sale to agency holding company Omnicom.
Read more at Wikipedia