Sarepta Therapeutics, Inc., a commercial-stage biopharmaceutical company, focuses on the discovery and development of RNA-targeted therapeutics, gene therapies, and other genetic therapeutic modalities for the treatment of rare diseases. It offers EXONDYS 51 injection to treat duchenne muscular dystrophy (duchenne) in patients with confirmed mutation of the dystrophin gene that is amenable to exon 51 skipping; VYONDYS 53 for the treatment of duchenne in patients with confirmed mutation of the dystrophin gene that is amenable to exon 53 skipping; AMONDYS 45 for the treatment of duchenne in patients with confirmed mutation of the dystrophin gene; and ELEVIDYS, an adeno-associated virus based gene therapy for the treatment of ambulatory pediatric patients aged 4 through 5 years with duchenne with a confirmed mutation in the duchenne gene. The company is also developing SRP-5051, a peptide conjugated PMO that binds exon 51 of dystrophin pre-mRNA; and SRP-9003, a limb-girdle muscular dystrophies gene therapy program. It has collaboration and license agreements with F. Hoffman-La Roche Ltd; Nationwide Children's Hospital; Genevant Sciences; University of Florida; Dyno Therapeutics; Hansa Biopharma; Duke University; Genethon; and StrideBio. The company was incorporated in 1980 and is headquartered in Cambridge, Massachusetts.

Krystal Biotech, Inc., a commercial-stage biotechnology company, discovers, develops, and commercializes genetic medicines for patients with rare diseases in the United States. It commercializes VYJUVEK (beremagene geperpavec-svdt, or B-VEC) for the treatment of dystrophic epidermolysis bullosa (DEB). The company also develops KB105, which is in Phase 1/2 clinical trials for treating patients with deficient autosomal recessive congenital ichthyosis; KB104 for treating netherton syndrome; KB407 that is in Phase 1 clinical trials for treating cystic fibrosis; KB707 that is in Phase 1 clinical trials for the treatment of anti-PD-1 relapsed/refractory; KB408, which is in Phase 1 clinical trials for treating Alpha-1 antitrypsin deficiency; and KB301 that is in Phase 2 clinical trials for treating aesthetic skin conditions, as well as in open label study with ophthalmic B-VEC for treating for ocular complications of deb. Krystal Biotech, Inc. was founded in 2016 and is headquartered in Pittsburgh, Pennsylvania.

PTC Therapeutics, Inc., a biopharmaceutical company, focuses on the discovery, development, and commercialization of medicines to patients with rare disorders in the United States and internationally. The company offers Translarna and Emflaza for the treatment of Duchenne muscular dystrophy; Upstaza to treat aromatic l-amino acid decarboxylas (AADC) deficiency, a central nervous system disorder; Tegsedi and Waylivra for the treatment of rare diseases; and Evrysdi to treat spinal muscular atrophy (SMA) in adults and children. Its development pipeline products include Sepiapterin for the treatment of phenylketonuria; PTC518 splicing platform, which is being developed for the treatment of Huntington's disease; and ferroptosis and inflammation platforms, including vatiquinone to treat Friedreich ataxia and utreloxastat for the treatment of amyotrophic lateral sclerosis. The company distributes its products through third-party distributors. It has collaborations with F. Hoffman-La Roche Ltd, Hoffman-La Roche Inc., the SMA Foundation, National Taiwan University, Akcea Therapeutics, Inc., and Shiratori Pharmaceutical Co., Ltd. The company has license and collaboration agreement with Novartis Pharmaceuticals Corporation to develop PTC518 Huntington's disease program. PTC Therapeutics, Inc. was incorporated in 1998 and is headquartered in South Plainfield, New Jersey.

uniQure N.V. develops treatments for patients suffering from rare and other devastating diseases. It offers HEMGENIX that has completed Phase III HOPE-B pivotal trial for the treatment of hemophilia B. The company also develops AMT-130, a gene therapy that is in Phase I/II clinical study for the treatment of Huntington's disease. In addition, it is developing AMT-162, which is in preclinical trial for the treatment of superoxide dismutase 1- amyotrophic lateral sclerosis; AMT-260 that is in preclinical trial to treat temporal lobe epilepsy; AMT-191, which is in preclinical trial for the treatment of fabry disease; AMT-161 that is in preclinical trial to treat amyotrophic lateral sclerosis caused by mutations; AMT-240, which is in preclinical trial to for the treatment of autosomal dominant Alzheimer's disease; and AMT-210 that is in preclinical trial to treat Parkinson's disease. The company was founded in 1998 and is headquartered in Amsterdam, the Netherlands.

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.

PepGen Inc., a clinical-stage biotechnology company, focuses on the development of oligonucleotide therapeutics for use in the treatment of severe neuromuscular and neurologic diseases. Its lead product candidate is PGN-EDO51, an EDO peptide that is in Phase 2 clinical trial to treat Duchenne muscular dystrophy (DMD) patients. The company is also developing PGN-EDODM1, an EDO peptide-conjugated PMO, which is in Phase 1 clinical trial for the treatment of myotonic dystrophy type 1, as well as EDO therapeutic candidates, such as PGN-EDO53, PGN-EDO45, and PGN-EDO44 for the treatment of DMD. PepGen Inc. was founded in 2018 and is based in Boston, Massachusetts.

Passage Bio, Inc., a genetic medicines company, develops gene therapies for central nervous system diseases. It develops PBGM01, a functional GLB1 gene encoding ß-galactosidase for infantile GM1; PBFT02, a functional granulin (GRN) and gene encoding progranulin (PGRN) for the treatment of FTD caused by progranulin deficiency; and PBKR03, a functional GALC gene encoding the hydrolytic enzyme galactosylceramidase for infantile Krabbe disease. The company develops PBML04 for the treatment of metachromatic leukodystrophy; PBAL05 for the treatment of amyotrophic lateral sclerosis; and other program for huntington's disease. It has a strategic research collaboration with the Trustees of the University of Pennsylvania's Gene Therapy Program; and collaboration agreement, and a development services and clinical supply agreement with Catalent Maryland, Inc. Passage Bio, Inc. was incorporated in 2017 and is headquartered in Philadelphia, Pennsylvania.

Pasithea Therapeutics Corp., a biotechnology company, engages in discovery, research, and development of treatments for central nervous system disorders, RASopathies, and other diseases. Its lead product candidate PAS-004, a next-generation macrocyclic mitogen-activated protein kinase, or MEK inhibitor for use in the treatment of a range of RASopathies, including neurofibromatosis type 1 oncology indications. The company intends to develop PAS-003, to treat amyotrophic lateral sclerosis; and PAS-001, to treat schizophrenia. Pasithea Therapeutics Corp. was incorporated in 2020 and is headquartered in Miami Beach, Florida.