Who was CEO of Twitter from 2010 to 2015?

Dick Costolo was CEO of Twitter from 2010 to 2015.

Costolo joined Twitter as chief operating officer in 2009 after Google acquired FeedBurner, the web-feed company he had co-founded. On October 4, 2010, he succeeded Evan Williams as Twitter’s chief executive, initially in circumstances that were expected to be temporary but ultimately became permanent.

During Costolo’s tenure, Twitter continued its rapid international growth and became a publicly traded company in 2013. He also faced the platform’s difficult questions about abuse, harassment, moderation, and how to convert enormous public attention into a sustainable business.

Costolo announced in June 2015 that he would step down, and he left the CEO role on July 1, 2015. Twitter co-founder Jack Dorsey then served as interim CEO before returning permanently later that year. Parag Agrawal became CEO much later, in 2021, so he is not the answer for the 2010–2015 period.