Linda Yaccarino is stepping down as CEO of X after two years running the company, she announced today. She was appointed its CEO in the year after Elon Musk bought and renamed the company previously known as Twitter — so far, there is no word on who will replace her.

Yaccarino announced Wednesday she’s stepping down, and it’s not clear if the platform’s owner, Elon Musk, plans to announce a successor.

Yaccarino led X through a tumultuous period as the social network tried to rebuild its relationship with brands concerned that their ads could show up next to offensive content.