Axsome Therapeutics, Inc., a biopharmaceutical company, engages in the development of novel therapies for central nervous system (CNS) disorders in the United States. The company's commercial product portfolio includes Auvelity (dextromethorphan-bupropion), a N-methyl-D-aspartate receptor antagonist with multimodal activity indicated for the treatment of major depressive disorder; and Sunosi (solriamfetol), a medication indicated to the treatment of excessive daytime sleepiness in patients with narcolepsy or obstructive sleep apnea. It is also developing AXS-05, which is in Phase III clinical trial to treat Alzheimer's disease agitation, as well as that has completed phase II clinical trial for the treatment of smoking cessation; AXS-07, an investigational medicine that has completed Phase III trials for the acute treatment of migraine; AXS-12, an investigational medicine, which is in Phase III trial to treat narcolepsy; AXS-14, a selective and potent norepinephrine reuptake inhibitor that has completed Phase III trial for the treatment of fibromyalgia and other conditions; and solriamfetol, a dual-acting dopamine and norepinephrine reuptake inhibitor, which has completed a Phase 2 trial for treating attention-deficit/hyperactivity disorder, and is in phase 2 major depressive, binge eating, and shift work disorder. Axsome Therapeutics, Inc. has a research collaboration agreement with Duke University for evaluating AXS-05 in smoking cessation. The company was incorporated in 2012 and is based in New York, New York.

ACADIA Pharmaceuticals Inc., a biopharmaceutical company, focuses on the development and commercialization innovative medicines that address unmet medical needs in central nervous system (CNS) disorders and rare diseases in the United States. The company offers NUPLAZID (pimavanserin) for the treatment of hallucinations and delusions associated with Parkinson's disease psychosis; and DAYBUE, a novel synthetic analog of the amino-terminal tripeptide of insulin-like growth factor 1 for treatment of Rett Syndrome. It also develops Pimavanserin that is in Phase III ADVANCE-2 study to treat the negative symptoms of schizophrenia; ACP-101 whixh is in Phase III for the treatment of hyperphagia in Prader-Willi syndrome; ACP-204 which is in Phase II for the treatment of Alzheimer's disease psychosis; ACP-2591 that is in Phase I for Rett syndrome and Fragile X syndrome; preclinical antisense oligonucleotide programs; and other programs for neuropsychiatric symptoms. It has a license agreement with Neuren Pharmaceuticals Limited to develop and commercialize trofinetide for Rett syndrome and other indications; and a license and collaboration agreement with Stoke Therapeutics, Inc. to discover, develop and commercialize novel RNA-based medicines for the potential treatment of severe and rare genetic neurodevelopmental diseases of the CNS. The company was formerly known as Receptor Technologies, Inc. and changed its name ACADIA Pharmaceuticals Inc. in 1997. ACADIA Pharmaceuticals Inc. was incorporated in 1993 and is headquartered in San Diego, California.

Mind Medicine (MindMed) Inc., a clinical stage biopharmaceutical company, develops novel products to treat brain health disorders. The company's lead product candidates include MM-120, which is in phase 2 for the treatment of generalized anxiety disorder and attention deficit hyperactivity disorder; and MM-402, a R-enantiomer of 3,4-methylenedioxymethamphetamine, which is in phase I clinical trials for the treatment of core symptoms of autism spectrum disorder. Mind Medicine (MindMed) Inc. is headquartered in New York, New York.

Neurogene Inc., a biotechnology company, develops genetic medicines for rare neurological diseases. The company's product candidates include NGN-401 which is packaged in an adeno-associated virus 9 that is in Phase 1/2 clinical trial for the treatment of Rett syndrome; and NGN-101, a conventional gene therapy candidate that is in Phase 1/2 clinical trial to treat CLN5 Batten disease. It has a license agreement with The University of North Carolina, the University of Edinburgh, Virovek, Inc., and Sigma-Aldrich Co. LLC. The company is headquartered in New York, New York.

Annexon, Inc., a clinical-stage biopharmaceutical company, discovers and develops medicines for treating inflammatory-related diseases. Its lead candidate is ANX005, an investigational full-length monoclonal antibody, which is in Phase 3 clinical trial for the treatment of patients with guillain-barré syndrome; completed Phase II clinical trial for treating Huntington's disease; and in Phase II clinical trial for the treatment of amyotrophic lateral sclerosis. The company is also developing ANX007, an antigen-binding fragment (Fab) that is in Phase 3 program for the treatment of patients with geographic atrophy; and ANX1502, a novel oral small molecule inhibitor, which is in Phase 1 clinical trials for autoimmune indications. In addition, it develops ANX009, a C1q-blocking Fab that is in Phase I clinical trial for treating patients with lupus nephritis. The company was incorporated in 2011 and is headquartered in Brisbane, California.

Annovis Bio, Inc., a clinical stage drug platform company, develops drugs to treat neurodegeneration. The company's lead product candidate is Buntanetap, which has completed three Phase 1/2 clinical trials for the treatment of Alzheimer's disease (AD), Parkinson's disease, and other chronic neurodegenerative diseases. It is also developing ANVS405, which is in Phase 2 and Phase 3 efficacy studies, an intravenous drug for protecting the brain after traumatic brain injury and/or stroke; and ANVS301, which is in Phase I clinical trials, an orally administered drug to increase cognitive capability in later stages of AD and dementia. The company was incorporated in 2008 and is based in Malvern, Pennsylvania.

Synaptogenix, Inc. operates as a clinical-stage biopharmaceutical company. It is conducting clinical and preclinical studies of its lead therapeutic candidate, Bryostatin-1, in Alzheimer's disease. Its preclinical studies have also demonstrated bryostatin's regenerative mechanisms of action for the rare disease Fragile X syndrome, and for other neurodegenerative disorders, such as multiple sclerosis, stroke, and traumatic brain injury. The U.S. Food and Drug Administration has granted Orphan Drug Designation to Synaptogenix for Bryostatin-1 as a treatment for Fragile X syndrome. The company was incorporated in 2012 and is headquartered in New York, New York.

Seelos Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on the development and commercialization of therapeutics for the treatment of central nervous system and other disorders. The company's lead programs are SLS-002, an intranasal racemic ketamine for the treatment of acute suicidal ideation and behavior in patients with major depressive disorders; SLS-004, an gene therapy targeting gene and alpha synuclein; SLS-005, a protein stabilizer for the treatment of amyotrophic lateral sclerosis and Sanfilippo syndrome; SLS-007, a peptidic inhibitor for NACore Parkinson disease; and SLS-009, a protein targeted autophagy for Alzheimer disease. Seelos Therapeutics, Inc. was founded in 2016 and is headquartered in New York, New York. On November 16, 2024, Seelos Therapeutics, Inc. filed a voluntary petition for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the Southern District of New York.