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

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) \<0.70 * Former or current smokers ≥10 pack-years * Chronic Airways Assessment Test (CAAT) ≥10 * ≥2 moderate or ≥1 severe COPD exacerbations in the prior year * Triple (ICS+LABA+LAMA) COPD therapy ≥12 consecutive weeks * EOS (blood eosinophil count) ≥ 150 cells/μL * 18.0 ≤ Body Mass Index ≤ 40.0 kg/m2 Exclusion Criteria: Participants are excluded from the study if any of the following criteria apply: * Asthma, including pediatric asthma, or asthma-COPD overlap syndrome (ACOS) * Significant pulmonary disease other than COPD * Long-term oxygen therapy \>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