ATI Physical Therapy, Inc. (NYSE: ATIP) is a national outpatient physical and occupational therapy provider that became publicly traded through a business combination with Fortress Value Acquisition Corp. II, a blank-check company sponsored by an affiliate of Fortress Investment Group that completed its IPO in 2020. The February 2021 Form 8-K filing marks a key milestone in that transaction process, which ultimately closed in mid-2021. Operating in the healthcare and musculoskeletal rehabilitation services sector, ATI ran more than 900 clinics at the time of its debut and subsequently navigated significant financial and operational headwinds, including a formal restructuring. Sign up at SpacDesk for complete filing histories, merger timelines, and in-depth SPAC analytics.