Orchard Therapeutics plc, a gene therapy company, research, develops, and commercialize hematopoietic stem cell and gene therapies in the United Kingdom, Italy, France, and Germany. It offers OTL-200, an ex vivo autologous hematopoietic stem cell gene therapy for the treatment of patients with metachromatic leukodystrophy under the Libmeldy brand; and Strimvelis, a gammaretroviral vector-based gene therapy for the treatment of adenosine deaminase deficiency. The company's program for neurodegenerative disorders comprises clinical proof of concept-stage program, which includes OTL-203 for the treatment of mucopolysaccharidosis type I and OTL-201 for mucopolysaccharidosis type IIIA, or MPS-IIIA; and pre-clinical program, OTL-204 for the treatment of frontotemporal dementia with progranulin mutations. In addition, it develops program for immunological disorders consist of pre-clinical programs, which includes OTL-104 for Crohn's disease with mutations in the nucleotide-binding oligomerization domain-containing protein 2; and OTL-105 for the treatment of hereditary angioedema. The company was formerly known as Orchard Rx Limited. Orchard Therapeutics plc was founded in 2015 and is headquartered in London, the United Kingdom. As of January 24, 2024, Orchard Therapeutics plc operates as a subsidiary of Kyowa Kirin Co., Ltd..