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Aptevo Therapeutics Inc., a clinical-stage research and development biotechnology company, focuses on developing immunotherapeutic candidates for the treatment of various forms of cancer in the United States. It develops its products using ADAPTIR and ADAPTIR-FLEX platforms to generate monospecific, bispecific, and multi-specific antibody candidates capable of enhancing the human immune system against cancer cells. The company's lead clinical blood cancer candidate is APVO436 that is in Phase 1b/2 clinical trial for acute myelogenous leukemia. It is also developing ALG.APV-527, a novel investigational bispecific ADAPTIR candidate that is in Phase 1 clinical trial for NSCLC, head and neck, colorectal, pancreatic, breast, and other solid tumors; APVO603, a preclinical dual agonist bispecific ADAPTIR candidate for multiple solid tumors; APVO442, a novel bispecific candidate based on the ADAPTIR-FLEX platform technology for multiple solid tumors; and APVO711, a preclinical dual mechanism bispecific ADAPTIR candidate for prostate cancer. The company has a collaboration and option agreement with Alligator Bioscience AB to develop ALG.APV-527. Aptevo Therapeutics Inc. was incorporated in 2016 and is headquartered in Seattle, Washington.

Pasithea Therapeutics Corp., a biotechnology company, engages in research and discovery of treatments for Central Nervous System disorders, RASopathies, and other diseases. It operates through two segments, Therapeutics and Clinics. The company provides business support services to anti-depression clinics, entities, and registered healthcare providers. Its lead product candidate PAS-004, a next-generation mitogen-activated protein kinase, or MEK inhibitor designed to be macrocyclic for use in the treatment of a range of RASopathies, including neurofibromatosis type 1 and Noonan syndrome, as well as lamin A/C cardiomyopathy and oncology indications. The company intends to develop PAS-003, to treat amyotrophic lateral sclerosis; PAS-002, for the treatment multiple sclerosis; and PAS-001, to treat schizophrenia. Pasithea Therapeutics Corp. was incorporated in 2020 and is headquartered in Miami Beach, Florida.

Stealth BioTherapeutics Corp, a clinical-stage biotechnology company, focuses on the discovery, development, and commercialization of therapies for diseases involving mitochondrial dysfunction. Its lead product candidate is Elamipretide that is in phase 3 clinical trial to treat barth syndrome, phase 2/3 clinical trial for the treatment of duchenne cardiomyopathy, phase 2a clinical trial to treat friedreich's ataxia, phase 2 clinical trial for the treatment of dry age-related macular degeneration, phase 2 clinical trial to treat leber's hereditary optic neuropathy, and phase 3 clinical trial for the treatment of replisome myopathies. The company's product candidates also include SBT-20 to treat complications of diabetes, renal diseases, ocular diseases, neurodegenerative, Parkinson's, Alzheimer's, Huntington's, and ALS diseases; SBT-550 for rare neurological indications; and SBT-272, a peptidomimetic that targets the mitochondria and stabilizing mitochondrial function under conditions of oxidative stress, as well as SBT 550. Stealth BioTherapeutics Corp was incorporated in 2006 and is based in George Town, the Cayman Islands.

Reviva Pharmaceuticals Holdings, Inc., a clinical-stage biopharmaceutical company, discovers, develops, and commercializes next-generation therapeutics for diseases targeting unmet medical needs in the areas of central nervous system, respiratory, cardiovascular, metabolic, and inflammatory diseases. The company's lead product candidate is brilaroxazine (RP5063), which is in Phase III clinical trials for use in the treatment of schizophrenia, as well as completed Phase I clinical trials to treat bipolar disorder, major depressive disorder, attentiondeficit/hyperactivity disorder, behavioral and psychotic symptoms of dementia or Alzheimer's disease, Parkinson's disease psychosis, attention deficit hyperactivity disorder, pulmonary arterial hypertension, and idiopathic pulmonary fibrosis. It is also developing RP1208 that is in pre-clinical development studies for the treatment of depression and obesity. The company was founded in 2018 and is based in Cupertino, California.

Vaccinex, Inc., a clinical-stage biotechnology company, engages in the discovery and development of targeted biotherapeutics to treat cancer, neurodegenerative diseases, and autoimmune disorders. The company's lead drug candidate, pepinemab, a humanized monoclonal antibody that binds and blocks the activity of SEMA4D. Its Pepinemab is being evaluated in a Phase 1b/2 study in recurrent or metastatic head and neck cancer and in a Phase 1/2a study in Alzheimer's Disease, with ongoing exploration of potential Phase 3 development in Huntington's disease. It has also developed ActivMAb, an antibody drug discovery platform based on a novel method for complex targets, such as multi-pass membrane receptors or large and diverse libraries of full-length human monoclonal antibodies on the surface of pox viruses. The company was incorporated in 2001 and is headquartered in Rochester, New York.