172 Likes Disposals of own shares Brussels (Belgium), 5 March 2021 – 20:00 (CET) – regulated information In accordance with article 8:6 of the Royal Decree executing the Belgian Code of Companies and Associations, UCB SA/NV (“UCB” or the “Company) (Euronext Brussels: UCB) announces that, following exercises of stock options by members of its personnel, it has disposed of UCB shares OTC in view of deliveries of these shares to the relevant members of the personnel, within the framework of the Long Term Incentive Program of the UCB Group, as follows: In addition to these exercises, on 4 March 2021, under its Stock Award Plan 2020, UCB SA/NV has delivered for free respectively 141 and 176 UCB shares OTC to 2 members of the personnel of the Company and its subsidiaries. The highest independent bid price on Euronext Brussels on 4 March 2021 was € 81.06. This press release is available on UCB SA/NV’s website via the following link. Investor Relations Antje Witte Investor Relations, UCB T +32.2.559.94.14 antje.witte@ucb.com Isabelle Ghellynck, Investor Relations, UCB T+32.2.559.9588, isabelle.ghellynck@ucb.com About UCB UCB, Brussels, Belgium (www.ucb.com) is a global biopharmaceutical company focused on the discovery and development of innovative medicines and solutions to transform the lives of people living with severe diseases of the immune system or of the central nervous system. With approximately 8 400 people in approximately 40 countries, the company generated revenue of € 5.3 billion in 2020. UCB is listed on Euronext Brussels (symbol: UCB). Follow us on Twitter: @UCB_news Asset Download 210305 - Vervreemding van eigen aandelen ae50a84024885384.pdf 210305 - Disposals of own shares 172 Likes