X CEO Linda Yaccarino said she’s stepping down after two years running Elon Musk’s social media platform. Yaccarino posted a positive message Wednesday about her tenure at the company formerly known as Twitter and said “the best is yet to come as X enters a new chapter with” Musk’s artificial intelligence company xAI, maker of the chatbot Grok.

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.

Linda Yaccarino, who has led the Texas-based company since 2023, announced Wednesday she’s stepping down. She didn’t state a reason.