Neurocrine Biosciences, Inc. discovers, develops, and markets pharmaceuticals for neurological, neuroendocrine, and neuropsychiatric disorders in the United States and internationally. The company's products include INGREZZA for tardive dyskinesia and chorea associated with Huntington's disease; ALKINDI for adrenal insufficiency; Efmody capsules for classic congenital adrenal hyperplasia; Orilissa tablets for endometriosis; and Oriahnn capsules to treat uterine fibroids. Its product candidates in clinical development include valbenazine to treat dyskinetic cerebral palsy in pediatrics and adults; NBI-921352 to treat developmental and epileptic encephalopathy syndrome in pediatrics and adults; NBI-827104 to treat epileptic encephalopathy with continuous spike-and-wave during sleep; NBI-1076986 to treat movement disorders; crinecerfront to treat congenital adrenal hyperplasia in adults and children; EFMODY to treat congenital adrenal hyperplasia and adrenal insufficiency in adults; valbenazine for the adjunctive treatment of schizophrenia; NBI-1065845 for the treatment of inadequate response to treatment in major depressive disorder; luvadaxistat to treat cognitive impairment related to schizophrenia; NBI-1117568 for the treatment of schizophrenia; NBI-1070770 to treat major depressive disorder; NBI-1117570 for the treatment of symptoms of psychosis and cognition in neurological and neuropsychiatric conditions; and NBI-1117569, NBI-1117567, and NBI-1065890 to treat CNS indications. The company also has license and collaboration agreements with Heptares Therapeutics Limited; Takeda Pharmaceutical Company Limited; Idorsia Pharmaceuticals Ltd; Xenon Pharmaceuticals Inc.; Voyager Therapeutics, Inc.; BIAL – Portela & Ca, S.A.; Mitsubishi Tanabe Pharma Corporation; and AbbVie Inc. The company was incorporated in 1992 and is headquartered in San Diego, California.

Longboard Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company, focuses on developing novel and transformative medicines for neurological diseases. The company develops bexicaserin (LP352), which has completed Phase 1b/2a clinical trial for the treatment of seizures associated with developmental and epileptic encephalopathies. It also develops LP659, an S1P receptor modulator for the treatment of neurological diseases. The company was formerly known as Arena Neuroscience, Inc. and changed its name to Longboard Pharmaceuticals, Inc. in October 2020. Longboard Pharmaceuticals, Inc. was incorporated in 2020 and is based in La Jolla, California. As of December 2, 2024, Longboard Pharmaceuticals, Inc. operates as a subsidiary of Langkawi Corporation.

Supernus Pharmaceuticals, Inc., a biopharmaceutical company, focuses on the development and commercialization of products for the treatment of central nervous system (CNS) diseases in the United States. The company's commercial products are Trokendi XR, an extended release topiramate product indicated for the treatment of epilepsy, as well as for the prophylaxis of migraine headache; and Oxtellar XR, an extended release oxcarbazepine for the monotherapy treatment of partial onset seizures in adults and children between 6 to 17 years of age. It also offers comprise Qelbree, a novel non-stimulant indicated for the treatment of attention-deficit hyperactivity disorder (ADHD) in adults and pediatric patients 6 years and older; APOKYN for the acute intermittent treatment of hypomobility or off episodes in patients with advanced Parkinson's Disease (PD); XADAGO for treating levodopa/carbidopa in patients with PD experiencing off episodes; MYOBLOC, a Type B toxin product indicated for the treatment of cervical dystonia and sialorrhea in adults; GOCOVRI for the treatment of dyskinesia in patients with PD; and Osmolex ER for the treatment of Parkinson's disease and drug-induced extrapyramidal reaction in adult patients. In addition, the company's product candidates include SPN-830, a late-stage drug/device combination product candidate for the treatment of off episodes in PD patients; SPN-817, a novel first-in-class selective acetylcholinesterase inhibitor, which is in Phase II clinical trials for the treatment of epilepsy; SPN-820, a product candidate in Phase II clinical trials for treating resistant depression; SPN-443, a preclinical product for the treatment of ADHD/CNS; and SPN-446 for narcolepsy and SPN-448 for the treatment of CNS which is in discovery stage. It markets and sells its products through pharmaceutical wholesalers, specialty pharmacies, and distributors. Supernus Pharmaceuticals, Inc. was incorporated in 2005 and is headquartered in Rockville, Maryland.

Praxis Precision Medicines, Inc., a clinical-stage biopharmaceutical company, engages in the development of therapies for central nervous system disorders characterized by neuronal excitation-inhibition imbalance. It is developing ulixacaltamide, a small molecule inhibitor of T-type calcium channels that is in Phase III clinical trial for the treatment of essential tremor; PRAX-562 for the treatment of pediatric patients with developmental and epileptic encephalopathies (DEE); and PRAX-628 to treat focal epilepsy. The company also develops PRAX-222 for the treatment of pediatric patients with early-onset SCN2A-DEE; PRAX-020 to treat KCNT1 related epilepsies; PRAX-080 for the treatment of PCDH19; and PRAX-090 and PRAX-100 for SYNGAP1 and SCN2A-LoF. It has a license agreement with RogCon Inc.; a research collaboration and license agreement with Ionis Pharmaceuticals, Inc.; a strategic collaboration and license agreement with UCB Biopharma SRL; and collaboration with The Florey Institute to develop three novel ASOs. The company was incorporated in 2015 and is based in Boston, Massachusetts.

Neumora Therapeutics, Inc., a clinical-stage biopharmaceutical company, engages in developing therapeutic treatments for brain diseases, neuropsychiatric disorders, and neurodegenerative diseases. The company develops navacaprant (NMRA-140), a novel once-daily oral kappa opioid receptor antagonist, which is in phase 3 clinical trials for the treatment of major depressive disorder. It also develops NMRA-511 that is in phase 1 clinical trials in patients with agitation associated with dementia due to Alzheimer's disease; and NMRA-266, which is in the phase 1 clinical trial for the treatment of schizophrenia and other neuropsychiatric disorders. In addition, its preclinical phase product includes NMRA-NMDA for the treatment of schizophrenia; NMRA-CK1d, a CK1d inhibitor program for the treatment of amyotrophic lateral sclerosis; NMRA-NLRP3 for the treatment of certain neurodegenerative conditions; and NMRA-GCase for the treatment of Parkinson's disease. The company was formerly known as RBNC Therapeutics, Inc. and changed its name to Neumora Therapeutics, Inc. in October 2021. Neumora Therapeutics, Inc. was incorporated in 2019 and is headquartered in Watertown, Massachusetts.

Marinus Pharmaceuticals, Inc., a pharmaceutical company, focuses on development and commercialization of therapeutic products for patients suffering from rare genetic epilepsies and other seizure disorders. It offers ZTALMY (ganaxolone), an oral suspension for the treatment of seizures associated with cyclin-dependent kinase-like 5 deficiency disorder for adult and pediatric patient populations in acute and chronic care, and in-patient and self-administered settings. The company's ZTALMY product candidate acts at synaptic and extrasynaptic GABAA receptors, a target for its anti-seizure, antidepressant, and anxiolytic potential. It is developing ganaxolone for treating genetic epilepsy disorders, such as PCDH19-related epilepsy, and tuberous sclerosis complex. Marinus Pharmaceuticals, Inc. has license agreement with Purdue Neuroscience Company and CyDex Pharmaceuticals, Inc.; and collaboration agreement with Orion Corporation and Tenacia Biotechnology (Shanghai) Co., Ltd. Marinus Pharmaceuticals, Inc. was incorporated in 2003 and is headquartered in Radnor, Pennsylvania.

Ovid Therapeutics Inc., a biopharmaceutical company, engages in the development of impactful medicines for patients and families with epilepsies and seizure-related neurological disorders in the United States. The company is developing soticlestat, a novel cholesterol 24 hydroxylase inhibitor, which is in Phase 3 clinical trials for the potential treatment of patients with resistant epilepsies; OV329, a GABA aminotransferase inhibitor which is in Phase 1 clinical trials for the treatment of seizures associated with tuberous sclerosis complex and infantile spasms; and OV350, a small molecule direct activator of the KCC2 transporter, which is in Phase 1 clinical trials for treating epilepsies. It also develops OV815, that focuses on the mutations associated with KIF1A-associated neurological disorder (KAND); OV888 (GV101), a highly selective rock2 inhibitor which is in Phase 1 double-blind multiple-ascending dose trial; OV825, has advanced to potential candidate lead identification for the rare neurodevelopmental condition HNRNPH2 (Bain Syndrome); and OV882, a short hairpin RNA gene therapy for the treatment of Angelman syndrome. The company has license and collaboration agreements with Healx, AstraZeneca AB, H. Lundbeck A/S, Northwestern University, and Graviton, as well as Marinus Pharmaceuticals, Inc. The company was incorporated in 2014 and is headquartered in New York, New York.

XORTX Therapeutics Inc., a late stage clinical pharmaceutical company, engages in the development and commercialization of therapies to treat progressive kidney diseases, pre-diabetes, insulin resistance, metabolic syndrome, diabetes, diabetic nephropathy, and infection. It develops XRx-008, a late clinical stage program therapy for autosomal dominant polycystic kidney disease; XRx-101, a program to treat acute kidney injury (AKI) associated with respiratory virus infection and associated health consequences; and XRX-225, a program for treatment of type 2 diabetic nephropathy. It has a collaboration and license agreements with the Icahn School of Medicine; and a license agreement with the University of Florida Research Foundation, Inc. The company is based in Alberta Beach, Canada.