Who is listed as Tumblr's CEO in the Wikipedia infobox?

Who is listed as Tumblr’s CEO in the Wikipedia infobox? The answer is Matt Mullenweg.

Matt Mullenweg is the co-founder of Automattic, the company behind WordPress.com, and he became closely associated with Tumblr after Automattic acquired the service in 2019. Wikipedia’s Tumblr infobox lists him as the company’s CEO, making his name the intended answer rather than former executives connected with earlier ownership periods.

Tumblr was founded by David Karp in 2007, and Karp served as its original chief executive. After Yahoo acquired Tumblr in 2013, Karp remained CEO for a time before leaving. Jeff D’Onofrio later led the company during its Verizon Media period, which is why both names can appear in older accounts of Tumblr’s management.

Mullenweg’s role is also connected to Tumblr’s parent-company structure. Automattic purchased Tumblr from Verizon Media in 2019, and Tumblr continued as a separate service within the wider Automattic group. The question asks specifically who appears in Wikipedia’s infobox, so the relevant answer is the current listed executive rather than the founder or a former CEO.