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.

Catalyst Pharmaceuticals, Inc., a commercial-stage biopharmaceutical company, focuses on developing and commercializing therapies for people with rare debilitating, chronic neuromuscular, and neurological diseases in the United States. It offers Firdapse, an amifampridine phosphate tablets for the treatment of patients with lambert-eaton myasthenic syndrome (LEMS); and Ruzurgi for the treatment of pediatric LEMS patients. The company develops Firdapse for the treatment of MuSK antibody positive myasthenia gravis and spinal muscular atrophy type. It has license agreements with BioMarin Pharmaceutical Inc.; and collaboration and license agreement with Endo Ventures Limited for the development and commercialization of generic Sabril tablets. The company was founded in 2002 and is based in Coral Gables, Florida.

Beam Therapeutics Inc., a biotechnology company, engages in the development of precision genetic medicines for patients suffering from serious diseases in the United States. It develops BEAM-101 for the treatment of sickle cell disease or beta-thalassemia; and BEAM-302, a liver-targeting LNP formulation to treat severe alpha-1 antitrypsin deficiency; BEAM-201, an anti-CD7 CAR-T product candidate, which is in Phase 1/2 clinical trials for the treatment of refractory T-cell acute lymphoblastic leukemia/T cell lymphoblastic lymphoma; and BEAM-301, a liver-targeting LNP formulation for the treatment of glycogen storage disease 1a. The company has research collaboration agreement with Pfizer Inc., focus on in vivo base editing programs for targets rare genetic diseases of the liver, muscle, and central nervous system; Apellis Pharmaceuticals to conduct preclinical research on target specific genes within the complement system in various organs, including the eye, liver, and brain; Verve Therapeutics, Inc., for cardiovascular disease treatments; Sana Biotechnology, Inc., to research, develop, and commercialize rights to CRISPR Cas12b for cell therapy programs; and Orbital Therapeutics design RNA for the prevention, treatment or diagnosis of human disease. Beam Therapeutics Inc. was incorporated in 2017 and is based in Cambridge, Massachusetts.

Poseida Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on developing therapeutics for patients with high unmet medical needs. The company's development candidates for Heme Malignancies includes P-BCMA-ALLO1, which is in Phase I trial to treat patients with relapsed/refractory multiple myeloma; P-CD19CD20-ALLO1, which is in Phase I trial for treating B cell malignancies and other autoimmune diseases; P-BCMACD19-ALLO1, an allogeneic, off-the-shelf CAR-T product candidate in preclinical development for treating multiple myeloma; and P-CD70-ALLO1 under preclinical development to treat hematological indications. It is also involved in the development of P-MUC1C-ALLO1 that is in Phase I trial for treating a range of solid tumors, including breast, colorectal, lung, ovarian, pancreatic, and renal cancers; P-PSMA-ALLO1, an autologous chimeric antigen receptor T cell (CAR-T) product candidate that is in preclinical development for the treatment of patients with metastatic castrate resistant prostate cancer (mCRPC); and P-PSMA-101, an allogeneic CAR-T product candidate under Phase 1 clinical trial for treating mCRPC. In addition, the company engages in the development of P-FVIII-101, a clinical stage liver-directed gene therapy for the in vivo treatment of hemophilia A; P-OTC-101, a clinical stage liver-directed gene therapy for the in vivo treatment of ornithine transcarbamylase deficiency; and P-PAH-101, a clinical stage liver-directed gene therapy for the in vivo treatment of phenylketonuria. It has a research collaboration and license agreement with F. Hoffmann-La Roche Ltd, and Hoffmann-La Roche Inc. The company was incorporated in 2014 and is headquartered in San Diego, California.

Keros Therapeutics, Inc., a clinical-stage biopharmaceutical company, develops and commercializes novel therapeutics for patients with disorders that are linked to dysfunctional signaling of the transforming growth factor-beta family of proteins in the United States. The company's lead product candidate is KER-050, which is being developed for the treatment of low blood cell counts, or cytopenias, including anemia and thrombocytopenia in patients with myelodysplastic syndromes, as well as in patients with myelofibrosis. It also develops KER-012, which is in Phase II clinical trial to treat pulmonary arterial hypertension and cardiovascular disorders; and KER-065 that is in Phase I clinical trial for the treatment of obesity and neuromuscular diseases. In addition, the company has collaboration and license agreement with Hansoh (Shanghai) Healthtech Co., Ltd. to develop, manufacture, and commercialize KER-050 and licensed products containing KER-050. Keros Therapeutics, Inc. was incorporated in 2015 and is headquartered in Lexington, Massachusetts.

Foghorn Therapeutics Inc., a clinical-stage biopharmaceutical company, engages in the discovery and development of medicines targeting genetically determined dependencies within the chromatin regulatory system in the United States. The company uses its proprietary Gene Traffic Control platform to identify, validate, and potentially drug targets within the system. It develops FHD-286, a small molecule inhibitor of the enzymatic activity of BRG1 and BRM that is in phase I for the treatment of relapsed and/or refractory acute myeloid leukemia/myelodysplastic syndrome. The company is also developing therapies for mutant cancers, such as Non-Small Cell Lung, bladder, endometrial, colorectal, and melanoma cancers; and dependent cancers, including prostate cancer and diffuse large b-cell lymphoma. It has a research collaboration and license agreement with Merck Sharp & Dohme Corp. to discover and develop novel oncology therapeutics against a transcription factor target; and Eli Lilly and Company for developing FHD-909, a selective ATPase inhibitor of BRM. Foghorn Therapeutics Inc. was incorporated in 2015 and is headquartered in Cambridge, Massachusetts.

Solid Biosciences Inc., a life science company, develops therapies for neuromuscular and cardiac diseases in the United States. The company's lead product candidate is SGT-003, a gene transfer candidate for the treatment of Duchenne muscular dystrophy; and SGT-501 to treat Catecholaminergic polymorphic ventricular tachycardia. It is also developing AVB-401 for the treatment of BAG3-mediated dilated cardiomyopathy; SGT-601 to treat a rare cardiac disease characterized by mutations in the gene that codes for cardiac troponin T protein, which helps coordinate contraction of the heart muscle; SGT-701 for treatment of rare inherited disease characterized by mutations in the RBM20 gene, a cardiac splicing factor that regulates alternative splicing, and codes for RNA binding motif protein 20; and AVB-202-TT to treat Friedreich's ataxia, as well as other drugs for the treatment of cardiac and other diseases. In addition, the company is involved in developing platform technologies, including capsid libraries and dual gene expression, a technology for packaging multiple transgenes into one capsid. The company has collaboration and license agreement with Ultragenyx Pharmaceutical Inc. to develop and commercialize new gene therapies for Duchenne; and a license agreement with the University of Washington, University of Missouri, and University of Florida. Solid Biosciences Inc. was incorporated in 2013 and is headquartered in Charlestown, Massachusetts.

AVROBIO, Inc., a clinical-stage gene therapy company, develops hematopoietic stem cell gene therapies to treat rare diseases in the United States. Its gene therapies employ hematopoietic stem cells that are harvested from the patient and then modified with a lentiviral vector to insert the equivalent of a functional copy of the gene that is mutated in the target disease. The company's pipeline includes AVR-RD-02, which is in phase 1/2 clinical trial for the treatment of Gaucher disease type 1 and 3; AVR-RD-01, which is in phase 2 clinical trials for the treatment of Fabry disease; and AVR-RD-03 that is in preclinical stage for the treatment of Pompe disease. The company was incorporated in 2015 and is headquartered in Cambridge, Massachusetts.