AB Science S.A., a clinical-stage company, engages in the research, design, development, and marketing of drugs to address pathologies affecting the peripheral and central nervous system, inflammatory diseases, and cancers in France. The company's lead drug candidate is masitinib, a selective protein kinase inhibitor that targets mast cells and microglia in Phase 3 trial for the treatment of amyotrophic lateral sclerosis, progressive forms of multiple sclerosis, Alzheimer's disease, and indolent systemic mastocytosis, as well as in Phase 2 trial for mast cell activation syndrome and sickle cell disease. It also develops AB8939, a microtubule destabilizer in Phase 1 trial for the treatment of acute myeloid leukemia; and AB12319 in preclinical trial to treat sarcoma and solid tumors. In addition, the company markets its masitinib under the Masivet brand for the treatment of mast cell tumors in dogs in Europe. AB Science S.A. was incorporated in 2001 and is headquartered in Paris, France.