144 0001630914 XXXXXXXX LIVE 0001771910 ADC Therapeutics SA 001-39071 430 Mountain Ave Suite 404 New Providence NJ 07974 908-440-7732 Jean Bizzari Director Common Shares Morgan Stanley

1 New York Plaza 38th Floor New York NY 10004

6995 20215.55 79502 06/17/2024 NYSE Common Shares 06/14/2024 Vesting of Restricted Share Unit Grant ADC Therapeutics SA N 20000 06/14/2024 Vesting of Restricted Stock Unit Grant Y The Reporting Person is selling the securities set forth herein pursuant to an automatic "sell to cover" transaction that did not represent a discretionary trade by the Reporting Person in order to pay the tax liability arising from the vesting and settlement of restricted share units. 06/17/2024 /s/ Jean Bizzari