argenx SE, a biotechnology company, engages in the developing of various therapies for the treatment of autoimmune diseases in the United States, Japan, Europe, Middle East, Africa, and China. Its lead product candidate is efgartigimod for the treatment of patients with myasthenia gravis, immune thrombocytopenia, pemphigus vulgaris, generalized myasthenia gravis, chronic inflammatory demyelinating polyneuropathy, thyroid eye disease, bullous pemphigoid, myositis, primary sjögren's syndrome, post-covid postural orthostatic tachycardia syndrome, membranous nephropathy, lupus nephropathy, anca-associated vasculitis, and antibody mediated rejection; ENHANZE SC; Empasiprubart for multifocal motor neuropath, delayed graft function, and dermatomyositis; and ARGX-119 for congenital myasthenic syndrome and amyotrophic lateral sclerosis. The company is developing ARGX-213 targets FcRn; ARGX-121 and ARGX-220 targets immune system; ARGX-109 targets IL-6; ARGX-118 for inflammation; and ARGX-109, as well as cusatuzumab, ARGX-112, ARGX-114, and ARGX-115.