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Harpoon Therapeutics, Inc., a clinical-stage immunotherapy company, engages in the development of a novel class of T cell engagers that harness the power of the body's immune system to treat patients suffering from cancer and other diseases in the United States. The company develops tri-specific T cell activating construct (TriTAC) product candidate, including HPN328, which is in Phase I/II clinical trials for the treatment of small cell lung cancer and other Delta-like canonical Notch ligand 3-expressing tumors; and HPN217 that is in Phase I clinical trials for the treatment of multiple myeloma. Its preclinical stage product is HPN601 for the treatment of multiple solid tumor indications. It has a discovery collaboration and license agreement with AbbVie Biotechnology Ltd. to develop and commercialize products that incorporate its proprietary TriTAC platform technology together with soluble T cell receptors. The company was incorporated in 2015 and is headquartered in South San Francisco, California. As of March 11, 2024, Harpoon Therapeutics, Inc. operates as a subsidiary of Merck Sharp & Dohme LLC.

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..

Rubius Therapeutics, Inc., a biopharmaceutical company, focuses on the development of red cell therapeutics for the treatment of cancer and autoimmune diseases. The company was formerly known as VL26, Inc and as changed its name to Rubius Therapeutics, Inc. in 2015. Rubius Therapeutics, Inc. was incorporated in 2013 and is based in Foxborough, Massachusetts.

SPK Acquisition Corp. intends to effect a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses. It intends to focus on operating businesses in the telecommunications, media, and technology sectors in Asia. The company was incorporated in 2020 and is based in Shanghai, China.