Founder and CEO David Karp Is Leaving Tumblr by Year-End

President and COO Jeff D’Onofrio will take the reins

Tumblr founder and CEO David Karp will step down before year-end, handing the reins to president and chief operating officer Jeff D’Onofrio.

Karp shared his farewell to employees in a Tumblr post, saying in part: “I look back with so much pride at a generation of artists, writers, creators, curators and crusaders that have redefined our culture, and who we have helped to empower. There are no words, though, that can express how sincerely grateful I am for the privilege of working with you.

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