RTW Investments

Santa Ana Bio is a biotechnology company focused on developing precision therapies for autoimmune and inflammatory diseases. By utilizing advanced technologies such as deep cell profiling, single-cell genomics, and multi-omics platforms, the company designs targeted biologics that aim to provide effective and personalized treatment options. Through its innovative approach, Santa Ana Bio seeks to enhance patient outcomes and improve quality of life for those affected by autoimmune conditions.

Avidity Biosciences, Inc. is a biotechnology company focused on developing oligonucleotide-based therapies known as antibody oligonucleotide conjugates (AOCs). These innovative therapies aim to address the limitations of traditional oligonucleotide treatments by combining the tissue selectivity of monoclonal antibodies with the precision of oligonucleotide therapies. This approach allows Avidity to target previously undruggable tissue and cell types, thereby addressing the underlying genetic drivers of various diseases. The company's lead product candidate, AOC 1001, is designed to treat myotonic dystrophy type 1, a rare muscle disease. Additionally, Avidity is advancing multiple programs aimed at treating muscle-related conditions such as muscle atrophy, Duchenne muscular dystrophy, facioscapulohumeral muscular dystrophy, and Pompe disease. Founded in 2012 and based in La Jolla, California, Avidity is also exploring therapeutic applications in immune and other cell types.

BioAge Labs, Inc. is a biotechnology company focused on developing therapies to address aging and age-related diseases. The company utilizes a systems biology and artificial intelligence platform to identify key drug targets that influence aging and analyze extensive datasets to uncover the molecular drivers of age-related conditions. BioAge Labs is advancing several drug candidates, including BGE-117, a hypoxia-inducible factor prolyl hydroxylase inhibitor designed to activate genes involved in critical biological processes such as tissue regeneration and vascular remodeling. Additionally, BGE-175, an orally administered inhibitor of the prostaglandin D2 DP1 signaling pathway, aims to mitigate risks associated with immune aging and respiratory infections. Founded in 2015 and based in Richmond, California, BioAge Labs is committed to discovering and developing innovative treatments that harness the biology of human aging.

Taysha Gene Therapies, Inc. is a gene therapy company based in Dallas, Texas, established in 2019, focused on developing adeno-associated virus (AAV)-based gene therapies for monogenic diseases affecting the central nervous system (CNS). The company’s product pipeline includes several therapies currently in development, such as TSHA-101 for GM2 gangliosidosis, TSHA-118 for CLN1 disease, TSHA-102 for Rett syndrome, TSHA-103 for SLC6A1 haploinsufficiency disorder, and TSHA-104 for Surfeit locus 1 deficiency. Taysha Gene Therapies aims to translate innovative treatments from research to clinical practice efficiently, leveraging a strategic partnership with The University of Texas Southwestern Medical Center to enhance its development and commercialization capabilities. The company's mission is to create curative medicines that target both rare and prevalent CNS conditions, thereby addressing severe and life-threatening diseases.

Kyverna Therapeutics, Inc. is a cell therapy company focused on developing innovative treatments and potential cures for serious autoimmune diseases. Founded in 2018 and based in Berkeley, California, Kyverna employs advanced T cell engineering and synthetic biology technologies to target and eliminate autoreactive immune cells, which are responsible for the inflammation associated with these diseases. By addressing the root causes of autoimmune conditions, Kyverna aims to provide more effective and lasting solutions for patients suffering from these challenging health issues.

22seventy bio is an immuno-oncology cell therapy company that discovers and develops cancer therapies. The company combines a deep knowledge of cancer cell biology and genetics with an understanding of the immune response to cancer to advance its pipeline. It was established in Cambridge, Massachusetts in 2021.

Kyverna Therapeutics, Inc. is a cell therapy company focused on developing innovative treatments and potential cures for serious autoimmune diseases. Founded in 2018 and based in Berkeley, California, Kyverna employs advanced T cell engineering and synthetic biology technologies to target and eliminate autoreactive immune cells, which are responsible for the inflammation associated with these diseases. By addressing the root causes of autoimmune conditions, Kyverna aims to provide more effective and lasting solutions for patients suffering from these challenging health issues.

Rocket Pharmaceuticals is a biotechnology company dedicated to developing gene therapies aimed at treating rare pediatric diseases. The company's primary focus is on its lead program, a lentiviral-based gene therapy for Fanconi Anemia, a genetic disorder that leads to bone marrow failure. In addition to this, Rocket is advancing therapies for several other conditions, including Pyruvate Kinase Deficiency, Leukocyte Adhesion Deficiency-I, and Infantile Malignant Osteopetrosis, all of which are currently in various stages of clinical and preclinical trials. The company is also engaged in an adeno-associated virus program targeting Danon disease, a serious multi-organ disorder. Rocket Pharmaceuticals collaborates with various academic and research institutions, enhancing its research capabilities and expanding its therapeutic portfolio. The company is based in New York, New York.

Alcyone Therapeutics is Pioneering Next-Generation Precision CNS Genetic Therapies to unlock new possibilities and overcome challenges for CNS therapy development.

Monte Rosa Therapeutics is a biotechnology company focused on developing innovative cancer therapeutics that utilize molecular glue degraders (MGDs) to modulate protein degradation pathways. By leveraging the body's natural mechanisms for protein destruction, these small molecule drugs selectively target and degrade disease-causing proteins. The company employs its QuEEN platform, which combines artificial intelligence and proprietary experimental tools, to identify relevant proteins for degradation. With a diverse library of over 50,000 MGD molecules, Monte Rosa's lead candidate, MRT-2359, specifically targets the translation termination factor protein GSPT1, showing promise for treating MYC-driven tumors. The company aims to advance its pipeline of pioneering therapies for cancer and other diseases.

Encoded Therapeutics, Inc. is a biotechnology company that specializes in precision gene therapies aimed at treating a wide array of severe genetic disorders. Utilizing a unique platform, Encoded identifies sequences within the human genome that regulate gene expression through advanced screening and computational techniques. The company's therapy pipeline targets both genetic and acquired disorders across various disease pathways, including neurocircuitry, liver and metabolic disorders, neurodegeneration, and cardiovascular diseases. Founded in 2014 and based in South San Francisco, California, Encoded Therapeutics is focused on developing innovative solutions that enable medical practitioners to improve patient outcomes and enhance quality of life.

Frequency Therapeutics is a clinical-stage biotechnology company based in Woburn, Massachusetts, that aims to repair or reverse damage from various degenerative diseases by utilizing the body’s own biological mechanisms. The company employs a Progenitor Cell Activation approach, which involves the use of small molecules to activate progenitor cells and promote the regeneration of functional tissue. Its leading product candidate, FX-322, is currently undergoing phase 2a clinical trials to address the underlying causes of sensorineural hearing loss. In addition to hearing loss, Frequency Therapeutics is also exploring treatments for a range of other conditions, including multiple sclerosis and diseases affecting muscle, the gastrointestinal tract, skin, and bone. The company has established a collaboration with Astellas Pharma for the development and commercialization of FX-322. Founded in 2014, Frequency Therapeutics focuses on disease modification without the complexities associated with genetic engineering.

Cogent Biosciences is a biotechnology company focused on developing precision therapies for genetically defined diseases, utilizing proprietary T-cell engineering technology alongside tumor-targeting antibodies to harness the body’s immune system in the fight against cancer. The company designs targeted treatments aimed at addressing the underlying causes of diseases, thereby improving patient outcomes. One of its key programs, CGT9486, is a selective tyrosine kinase inhibitor that specifically targets the KIT D816V mutation and other mutations in KIT exon 17. This mutation is predominantly linked to Systemic Mastocytosis, a severe condition resulting from the uncontrolled growth of mast cells, and is also associated with advanced gastrointestinal stromal tumors. Cogent Biosciences is advancing its lead program, which is expected to enter Phase I clinical trials to evaluate safety and efficacy.

Avidity Biosciences, Inc. is a biotechnology company focused on developing oligonucleotide-based therapies known as antibody oligonucleotide conjugates (AOCs). These innovative therapies aim to address the limitations of traditional oligonucleotide treatments by combining the tissue selectivity of monoclonal antibodies with the precision of oligonucleotide therapies. This approach allows Avidity to target previously undruggable tissue and cell types, thereby addressing the underlying genetic drivers of various diseases. The company's lead product candidate, AOC 1001, is designed to treat myotonic dystrophy type 1, a rare muscle disease. Additionally, Avidity is advancing multiple programs aimed at treating muscle-related conditions such as muscle atrophy, Duchenne muscular dystrophy, facioscapulohumeral muscular dystrophy, and Pompe disease. Founded in 2012 and based in La Jolla, California, Avidity is also exploring therapeutic applications in immune and other cell types.

Frequency Therapeutics is a clinical-stage biotechnology company based in Woburn, Massachusetts, that aims to repair or reverse damage from various degenerative diseases by utilizing the body’s own biological mechanisms. The company employs a Progenitor Cell Activation approach, which involves the use of small molecules to activate progenitor cells and promote the regeneration of functional tissue. Its leading product candidate, FX-322, is currently undergoing phase 2a clinical trials to address the underlying causes of sensorineural hearing loss. In addition to hearing loss, Frequency Therapeutics is also exploring treatments for a range of other conditions, including multiple sclerosis and diseases affecting muscle, the gastrointestinal tract, skin, and bone. The company has established a collaboration with Astellas Pharma for the development and commercialization of FX-322. Founded in 2014, Frequency Therapeutics focuses on disease modification without the complexities associated with genetic engineering.

Encoded Therapeutics, Inc. is a biotechnology company that specializes in precision gene therapies aimed at treating a wide array of severe genetic disorders. Utilizing a unique platform, Encoded identifies sequences within the human genome that regulate gene expression through advanced screening and computational techniques. The company's therapy pipeline targets both genetic and acquired disorders across various disease pathways, including neurocircuitry, liver and metabolic disorders, neurodegeneration, and cardiovascular diseases. Founded in 2014 and based in South San Francisco, California, Encoded Therapeutics is focused on developing innovative solutions that enable medical practitioners to improve patient outcomes and enhance quality of life.

Stoke Therapeutics, Inc. is an early-stage biopharmaceutical company headquartered in Bedford, Massachusetts, focused on developing novel antisense oligonucleotide medicines to address the underlying causes of severe genetic diseases. The company employs its proprietary TANGO (Targeted Augmentation of Nuclear Gene Output) technology to enhance gene expression by targeting RNA splicing, thereby selectively restoring protein levels. Its lead product candidate, STK-001, is currently in clinical testing for the treatment of Dravet syndrome, a serious and progressive genetic epilepsy. Established in 2014, Stoke Therapeutics also collaborates with Invitae Corporation to provide genetic testing services, further supporting its mission to advance gene-targeted therapies for patients with severe genetic conditions.

Orchard Therapeutics is a biopharmaceutical company based in the United Kingdom that specializes in developing innovative gene therapies for serious and life-threatening rare diseases. The company employs an autologous ex vivo gene therapy approach, which modifies a patient's own hematopoietic stem cells to create a targeted treatment administered in a single dose. Orchard's portfolio includes Strimvelis, the first autologous gene therapy approved by the European Medicines Agency for the treatment of adenosine deaminase-severe combined immunodeficiency (ADA-SCID). Additionally, it is advancing clinical programs for various conditions, including metachromatic leukodystrophy, Wiskott-Aldrich syndrome, X-linked chronic granulomatous disease, and transfusion-dependent beta-thalassemia. The company also has an extensive preclinical pipeline targeting mucopolysaccharidosis types I, IIIA, and IIIB. Orchard Therapeutics collaborates with leading institutions in gene therapy research, enhancing its efforts to transform the lives of patients with rare diseases in the UK, European Union, and the United States. Founded in 2015 and headquartered in London, it aims to provide sustainable clinical benefits through its innovative therapies.

Orchard Therapeutics is a biopharmaceutical company based in the United Kingdom that specializes in developing innovative gene therapies for serious and life-threatening rare diseases. The company employs an autologous ex vivo gene therapy approach, which modifies a patient's own hematopoietic stem cells to create a targeted treatment administered in a single dose. Orchard's portfolio includes Strimvelis, the first autologous gene therapy approved by the European Medicines Agency for the treatment of adenosine deaminase-severe combined immunodeficiency (ADA-SCID). Additionally, it is advancing clinical programs for various conditions, including metachromatic leukodystrophy, Wiskott-Aldrich syndrome, X-linked chronic granulomatous disease, and transfusion-dependent beta-thalassemia. The company also has an extensive preclinical pipeline targeting mucopolysaccharidosis types I, IIIA, and IIIB. Orchard Therapeutics collaborates with leading institutions in gene therapy research, enhancing its efforts to transform the lives of patients with rare diseases in the UK, European Union, and the United States. Founded in 2015 and headquartered in London, it aims to provide sustainable clinical benefits through its innovative therapies.

Solid Biosciences Inc. is a life science company focused on developing therapies for Duchenne muscular dystrophy (DMD), a severe genetic muscle-wasting disease primarily affecting boys. The company's lead product candidate, SGT-001, is a gene transfer therapy currently undergoing a Phase I/II clinical trial aimed at restoring functional dystrophin protein expression in patients’ muscles. DMD is a progressive and ultimately fatal condition, with an estimated prevalence of 10,000 to 15,000 cases in the United States. In addition to SGT-001, Solid Biosciences is advancing the Anti-LTBP4 program, which targets the LTBP4 protein to reduce fibrosis and inflammation. The company also develops biomarkers, sensors, and the Solid Suit program, which includes wearable assistive devices designed to provide functional and therapeutic benefits. Established in 2013 and headquartered in Cambridge, Massachusetts, Solid Biosciences collaborates with Ultragenyx to enhance its gene therapy initiatives for DMD.

REGENXBIO Inc. is a clinical-stage biotechnology company specializing in gene therapy aimed at addressing genetic defects and enabling cells to produce therapeutic proteins and antibodies. The company utilizes its proprietary NAV Technology Platform, which involves recombinant adeno-associated virus vectors for gene delivery. REGENXBIO’s lead candidate, RGX-314, is currently in Phase I/IIa clinical trials for the treatment of wet age-related macular degeneration. Additional product candidates under development include RGX-121 for mucopolysaccharidosis type II, RGX-111 for mucopolysaccharidosis type I, RGX-181 for late infantile neuronal ceroid lipofuscinosis type II, and RGX-501 for homozygous familial hypercholesterolemia. Beyond its own product candidates, REGENXBIO also licenses its NAV Technology Platform to other biotechnology and pharmaceutical companies and has a collaboration agreement with Neurimmune AG to develop vectorized antibodies for neurodegenerative diseases. Founded in 2008 and headquartered in Rockville, Maryland, the company was previously known as ReGenX Biosciences, LLC before rebranding in 2014.