From their email newsletter:
https://theathletic.com/3055821/2022/01/06/a-note-to-our-subscribers-from-the-founders-of-the-athletic/
Also here on their website:we have entered into an agreement to be acquired by The New York Times Company, a transaction that is expected to close in the first quarter of 2022.
https://theathletic.com/3055821/2022/01/06/a-note-to-our-subscribers-from-the-founders-of-the-athletic/