Tumblr Founder David Karp Opens NASDAQ Exchange

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David Karp, founder of the micro-blogging site Tumblr, uses his phone... News PhotoArts Culture and Entertainment,Business,Corporate Business,David Karp,Finance,Founder,Horizontal,New York City,Telephone,Tumblr,USA,Waist UpPhotographer Collection: Getty Images News 2013 Getty ImagesNEW YORK, NY - JULY 11: David Karp, founder of the micro-blogging site Tumblr, uses his phone before opening the NASCAQ Exchange on July 11, 2013 in New York City. Tumblr was bought by Yahoo! for $1 billion in May; Karp is estimated to be worth $200 million. (Photo by Andrew Burton/Getty Images)