X0306 4 2021-09-13 0 0001378950 CarParts.com, Inc. PRTS 0001761840 Peker Lev 2050 W. 190TH STREET, SUITE 400 TORRANCE CA 90504 1 1 0 0 Chief Executive Officer Common Stock 2021-09-13 4 S 0 18017 17.69 D 934456 D Common Stock 38869 I By IRA Common Stock 56000 I By Spouse's IRA Represents shares of common stock sold by the Reporting Person to satisfy certain tax withholding obligations associated with the quarterly vesting of 36,087 restricted stock units. These restricted stock units were previously reported as shares acquired in the Form 4 filed on March 11, 2021 because the performance criteria was satisfied at that time. Certain of these shares are subject to a restricted stock award, pursuant to which such shares will vest in quarterly installments through March 9, 2023 in accordance with the applicable vesting schedule, provided that the Reporting Person remains an employee of the Company through each vesting date. /s/ Lev Peker 2021-09-14