X0206 3/A 2021-06-16 2021-06-28 0 0001815849 ATI Physical Therapy, Inc. ATIP 0001065871 LARSEN JOHN L C/O ATI PHYSICAL THERAPY 790 REMINGTON BBOULEVARD BOLINGBROOK IL 60440 true Class A Common Stock 16143 D Time-vested restricted stock which was inadvertently omitted from the Reporting Person's Form 3 filed on June 28, 2021. /s/John Lines as Attorney-in-Fact for Reporting Person 2022-11-25