LONDON--(BUSINESS WIRE)--Citi, acting through Citibank N.A., has been appointed by Celyad SA (“Celyad”), a leader in engineered cell therapy treatments, as depositary bank for their Level 3 American Depositary Receipt (ADR) programme listed on NASDAQ, which trades under symbol “CYAD”. Each ordinary share is equivalent to 1 ADR. Celyad’s ordinary shares are listed on Euronext Brussels and Euronext Paris and also trade under symbol “CYAD”. “Citi is delighted to be appointed by Celyad as depositar