A Maintenance Study to Investigate the Efficacy and Safety of Duvakitug in Participants With Moderately to Severely Active Ulcerative Colitis

This is a multicenter, randomized, double-blind, placebo-controlled Phase 3 maintenance study to evaluate the efficacy and safety of duvakitug in participants with moderately to severely active Ulcerative Colitis (UC).

Study details include:

The study duration may be up to 286 weeks including:

• 40-week Pivotal Maintenance Sub-Study
• 240-week Open-Label Extension (OLE) Sub-Study
• 45-day Follow-up Visit Note: For the participants who do not enroll into OLE Sub-Study, the duration will be up to 46 weeks, including the 40-week maintenance period and a 45-day follow-up visit.

The treatment duration may be up to 280 weeks including:

• 40 weeks in Pivotal Maintenance Sub-Study
• 240 weeks in OLE Sub-Study

The total number of on-site visit will be up to 32:

• 21 visits in the Pivotal Maintenance Sub-Study.
• 11 visits in the OLE Sub-Study.

Inclusion Criteria:

• Participants aged ≥18 and ≤80 years of age at Baseline. (Where locally permissible, participants 16 to <18 years of age who meet the definition of Tanner stage 5 for development)
• Pivotal Maintenance Sub-Study: Participants who achieved clinical response and completed endoscopy at the end of SUNSCAPE-1
• OLE Sub-Study: Participants who complete the Pivotal Maintenance Sub-Study or participation in the TV48574-IMM-20038 Study

Exclusion Criteria:

• Participants with medical or compliance conditions that are deemed unsuitable for the study by the investigator
• Participants with a known hypersensitivity to duvakitug that makes the participant unsuitable for the study by the investigator

The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.