https://www.theverge.com/2017/11/27/16705748/tumblr-ceo-david-karp-founder-resignation-verizon-yahoo-oath

Tumblr CEO and founder David Karp, who created the blogging site more than 10 years ago at the age of 20, is resigning from the company. The news, first reported by The New York Times, was confirmed to The Verge in a statement from Verizon-owned media conglomerate Oath, to which Tumblr belongs, following a dizzying string of mergers and acquisitions over the last four years.

“David Karp will depart Oath by the end of the year,” the statement reads. “David founded Tumblr 10 years ago as a space for the world’s creators, and we thank him for his commitment and passion driving the growth of the platform to almost 380 million blogs and over 155 billion posts.”