Efficacy, Safety, and Tolerability Study of Lunsekimig Compared With Placebo in Adult Participants With Inadequately Controlled Chronic Obstructive Pulmonary Disease (COPD) Characterized by an Eosinophilic Phenotype

This is a parallel, Phase 2b/Phase 3, 3-arm study to investigate the efficacy, safety, and tolerability of subcutaneous (SC) treatment with lunsekimig compared with placebo in adult participants (aged 40 to 80 years, inclusive) with inadequately controlled Chronic obstructive pulmonary disease (COPD) characterized by an eosinophilic phenotype. Participation to the study consists of 3 periods: * Screening period of up to 4 weeks * Randomized intervention period of approximately 48 weeks * Follow-up period: Approximately 8 weeks The study duration will be up to 60 weeks.

Inclusion Criteria: * Between 40 to 80 years of age * Physician diagnosed chronic obstructive pulmonary disease (COPD) ≥1 year * Post-bronchodilator forced expiratory volume in 1 second (post-BD FEV1) ≥ 20% and ≤ 70% of predicted value and FEV1/FVC (forced expiratory volume in 1 second /forced vital capacity) \4.0 L/min or requirement of \>2.0 L/min to maintain oxygen saturation \>88% at rest * Unstable disorder that can impact participants safety or study outcomes * Active or incompletely treated tuberculosis * Current or past malignancies * Concomitant therapies: * long-term macrolides or phosphodiesterase Type 3 (PDE-3) or PDE-4 inhibitors unless on stable therapy for \>6 months * any biologic therapy or systemic immunosuppressant within 4 months or 5 half-lives prior to Screening The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial