David Karp is an American web developer and entrepreneur. He is the founder and CEO of the short-form blogging platform Tumblr. According to Forbes, Karp's net worth exceeds $200 million, and Tumblr has been valued at $800 million. On May 20, 2013, it was announced that Yahoo! and Tumblr had reached an agreement for Yahoo! to acquire Tumblr for $1.1 billion. Karp would remain as CEO of the company. Karp began his career as an intern under Fred Seibert at the animation company Frederator Studios, where he built the studio's first blogging platform and conceived, wrote, and edited their first internet video network, Channel Frederator. Karp went on to work for online parenting forum UrbanBaby until it was sold to CNET in 2006. Karp then started his own software consulting company, Davidville, where he worked with computer engineer Marco Arment on projects for clients. During a gap between contracts in 2006, the two began work on a microblogging website, which was launched as Tumblr in February 2007. As of October 5, 2014, Tumblr hosts over 205.9 million blogs. 

July 6th, 1986 in New York City (Age 37)