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                          March 21, 2023

       Peter Graham, Esq.
       General Counsel
       ADC Therapeutics SA
       Biop  le
       Route de la Corniche 3B
       1066 Epalinges
       Switzerland

                                                        Re: ADC Therapeutics SA
                                                            Registration
Statement on Form F-3
                                                            Filed March 15,
2023
                                                            File No. 333-270570

       Dear Peter Graham:

              This is to advise you that we have not reviewed and will not
review your registration
       statement.

               Please refer to Rules 460 and 461 regarding requests for
acceleration. We remind you
       that the company and its management are responsible for the accuracy and
adequacy of their
       disclosures, notwithstanding any review, comments, action or absence of
action by the staff.

                                                        Please contact Tim
Buchmiller at (202) 551-3635 with any questions.




                          Sincerely,


                          Division of Corporation Finance

                          Office of Life Sciences
       cc:                                              Yasin Keshvargar, Esq.