X0306 4 2021-11-23 0 0001815849 ATI Physical Therapy, Inc. ATIP 0001867966 Chafey Diana C/O ATI PHYSICAL THERAPY, INC. 790 REMINGTON BOULEVARD BOLINGBROOK IL 60440 0 1 0 0 See Remarks Class A common stock 2021-11-23 4 A 0 77935 0.00 A 77935 D Stock Option (right to buy) 3.42 2021-11-23 4 A 0 69904 0.00 A 2031-11-23 Class A common stock 69904 69904 D Represents (a) 41,385 shares of restricted Class A common stock of the Issuer, and (b) 36,550 restricted stock units, each to receive one share of the Issuer's Class A common stock. The restricted Class A common stock vests quarterly in twelve substantially equal installments commencing on the quarterly anniversaries of June 16, 2021, and the restricted stock units vest in three substantially equal installments on each of the first three anniversaries of June 16, 2021, each subject to the Reporting Person's continued service through each vesting date. One-third of the Stock Options vest on each of the first three anniversaries of June 16, 2021, each subject to the Reporting Person's continued service through the applicable vesting date. Chief Legal Officer and Corporate Secretary See Exhibit 24.1 - Power of Attorney, incorporated herein by reference /s/ Erik Kantz, as Attorney-In-Fact for Reporting Person. 2021-11-26