X0508 4 2024-08-20 0001815849 ATI Physical Therapy, Inc. ATIP 0001307171 Parisi James E. C/O ATI HOLDINGS, LLC 790 REMINGTON BOULEVARD BOLINGBROOK IL 60440 true false Stock Option (Right to Buy) 10 2024-08-20 4 A 0 6255 0 A 2034-08-20 Class A Common Stock 6255 7885 D Stock Option (Right to Buy) 12.5 2024-08-20 4 A 0 6255 0 A 2034-08-20 Class A Common Stock 6255 14140 D Stock Option (Right to Buy) 25 2024-08-20 4 A 0 6255 0 A 2034-08-20 Class A Common Stock 6255 20395 D Stock Option (Right to Buy) 50 2024-08-20 4 A 0 12509 0 A 2034-08-20 Class A Common Stock 12509 32904 D One-third of the Stock Options vest on each of the following dates: April 1, 2025, April 1, 2026, and April 1, 2027, each subject to the Reporting Person's continued service through the applicable vesting date or application of certain vesting acceleration rights. /s/ Erik Kantz as Attorney-in-Fact for Reporting Person 2024-08-22