Linda Yaccarino, the Chief Executive Officer (CEO) of ‘X’, said she’s stepping down after two years running Elon Musk’s social media platform.

Yaccarino, 61, posted a positive message on Wednesday about her tenure at the company 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. She did not provide a reason for leaving.

In a post on X, Yaccarino said, “When @elonmusk and I first spoke of his vision for X, I knew it would be the opportunity of a lifetime to carry out the extraordinary mission of this company. I’m immensely grateful to him for entrusting me.”