Tumblr’s 26-Year-Old Founder Cashes In on $1.1 Billion Takeover

Tumblr’s 26-Year-Old Founder Cashes In on $1.1 Billion Takeover

Jennifer S. Altman/Bloomberg

David Karp, co-founder of Tumblr Inc., speaks at the TechCrunch Disrupt NYC 2012 conference in New York.