X0407 4 2023-06-07 0 0001651944 DermTech, Inc. DMTK 0001807311 Ibarra Claudia C/O DERMTECH, INC. 12340 EL CAMINO REAL SAN DIEGO CA 92130 0 1 0 0 Chief Operating Officer 0 Common Stock 2023-06-07 4 S 0 140 2.53 D 214565 D Common Stock 2023-06-07 4 S 0 1772 2.53 D 212793 D Common Stock 2023-06-07 4 S 0 2004 2.53 D 210789 D Common Stock 2023-06-08 4 S 0 2371 2.61 D 208418 D The shares were sold by the reporting person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of certain restricted stock units granted to the reporting person on March 29, 2021. The shares were sold by the reporting person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of certain restricted stock units granted to the reporting person on March 23, 2022. The shares were sold by the reporting person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of certain restricted stock units granted to the reporting person on March 7, 2023. The shares were sold by the reporting person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of certain restricted stock units granted to the reporting person on January 17, 2020. /s/ Mo Tashakor, attorney-in-fact 2023-06-09