This study aims to evaluate the clinical development program for icotrokinra in the treatment of adult participants with moderately to severely active UC. Icotrokinra may offer additional advantages beyond injectable antibody therapies and available
oral therapies for the treatment of patients with moderate to severely active UC due to its oral route of administration, high local exposure to GI tissues, and systemic activity. Overall, the program will evaluate icotrokinra treatment in a target of 822 adult and 60 adolescent participants through at least 52 weeks but participants can participate in a long-term extension for 4 years (total duration approximately 5 years).