X0306 4 2019-06-03 0 0001217234 CareDx, Inc. CDNA 0001613855 Maag Peter C/O CAREDX, INC. 3260 BAYSHORE BOULEVARD BRISBANE CA 94005 1 1 0 0 Chief Executive Officer Common Stock 2019-06-03 4 F 0 18592 32.80 D 389814 D Common Stock 1000 I As UTMA custodian for minor child Common Stock 1000 I As UTMA custodian for minor child These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of vested restricted stock units. Shares are held of record by the Reporting Person as custodian for a minor child under the Uniform Transfer to Minors Act. The Reporting Person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose. /s/ Peter Maag 2019-06-04