Phase1/2 Study of IPH6501 in Patients With Relapsed /Refractory B-Cell Non-Hodgkin Lymphoma

Main Inclusion criteria * Patients with advanced histologically confirmed, documented CD20+ B-cell non-Hodgkin's lymphoma (NHL) including the following types defined by WHO 2016: Diffuse Large B Cell Lymphoma (DLBCL); high grade; thymic; Follicular Lymphoma (FL); Mantle cell lymphoma (MCL); Marginal zone lymphoma (MZL) * Relapsed, progressive and/or refractory disease without established alternative therapy * Must have received at least 2 prior systemic therapies including at a minimum anti-CD20 antibody therapy (e.g., rituximab) potentially in combination with chemotherapy and/or relapsed after autologous stem cell rescue. * Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2 * Adequate organ and hematological function * Able to provide a fresh biopsy from a safely accessible site (or historical biopsy), per investigator determination. Main Exclusion Criteria * Patients with another invasive malignancy in the last 2 years * Prior chemotherapy, immunotherapy or other anti-cancer therapy within less than 4 weeks before study drug administration. * Autologous stem cell transplant or treatment with CAR-T (Chimeric Antigen Receptor T-Cell) cell therapy within 100 days prior to first dose of study drug * Subjects with brain or subdural metastases are not eligible, nor those with history of central nervous system (CNS) lymphoma * Current or past history of CNS disease, such as stroke, epilepsy, CNS vasculitis, or neurodegenerative disease. * Known history of infection with human immunodeficiency virus (HIV) or hepatitis B or C * Major surgery within 4 weeks before the first dose of study drug * Comorbidities including diabetes, cardiovascular diseases, immunodeficiencies/autoimmune condition * Pregnant / breastfeeding woman