Twitter employees flood Twitter with tweets for @dickc

Twitter CEO Dick Costolo at the 2014 International CES on Jan. 8, 2014, in Las Vegas.
Ethan Miller | Getty Images
Twitter CEO Dick Costolo at the 2014 International CES on Jan. 8, 2014, in Las Vegas.

Former and current Twitter employees have flooded the social network with messages directed toward CEO Dick Costolo, who will step down from the position on July 1, the company said Thursday.

#ThankYouDickC quickly became a top trending topic on Twitter after staffers began using the hashtag. Employees at Twitter's headquarters gave a "standing ovation for @dickc" in a companywide meeting, according to a post from Paul Stamatiou, a Twitter designer.

The meeting was attended by Costolo as well as soon-to-be interim CEO Jack Dorsey.