X0609 4 2026-06-01 0 0001771910 ADC Therapeutics SA ADCT 0001656998 Azelby Robert false 430 MOUNTAIN AVENUE, SUITE 404 NEW PROVIDENCE NJ 07974 1 0 0 0 0 Common Shares 2026-06-01 4 A 0 45000 0 A 125405 D Common Shares 2026-06-03 4 F 0 12600 3.08 D 112805 D Represents the annual grant of restricted stock units ("RSUs") made under the Issuer's 2019 Equity Incentive Plan for service as a Director. The RSUs vest on the earlier of (i) one year from the grant date or (ii) the date of the 2027 Annual Meeting of Shareholders, subject to the Reporting Person's continued service to the Issuer. Each RSU represents a contingent right to receive one share of the Issuer's common stock. Represents the number of Common Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted share units previously granted. /s/ Lisa Kallebo, as Attorney-in-Fact for Robert Azelby 2026-06-03