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Office Space: Tumblr

By Mark Milian - 2012-09-26T01:38:16Z

Photograph by Elizabeth Lippman/Bloomberg

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Karp's Start

Tumblr CEO David Karp grew up on Manhattan's Upper West Side and dropped out of high school before moving by himself to Tokyo when he was 17. He found the allure of New York to be irresistible, so he returned. In 2007, he started Tumblr, which today has more than one hundred employees. He still hasn't earned his high school diploma.