EcoR1 Capital

EcoR1 Capital, LLC is an employee-owned investment advisory firm based in San Francisco, California, founded in 2012. Specializing in the biotechnology sector, EcoR1 Capital focuses on identifying and evaluating innovative therapeutic solutions that can significantly enhance patient outcomes. The firm employs a long/short investment strategy primarily within the public equity markets of the United States, while also managing separate client-focused equity and fixed income portfolios. By investing in biotech companies that offer promising new treatments for untreated diseases, EcoR1 Capital aims to advance medical research and build upon the innovative contributions of its predecessors in the healthcare and life sciences fields.

Sarah Marriott JD

Partner and COO

Brad Prosek

Operating Partner

Spencer, Sarah

Principal

Zada, Basheer

Principal

Past deals in Genetics

Neurogene

Post in 2024
Neurogene Inc., established in 2018 and headquartered in New York, specializes in developing genetic medicines for treating neurological disorders. The company focuses on utilizing adeno-associated virus (AAV) vectors to deliver therapeutic genes for conditions such as Charcot-Marie Tooth disease type 4J (CMT4J), Aspartylglucosaminuria (AGU), and an undisclosed Lysosomal Storage Disease (LSD). Neurogene aims to provide effective treatment options where none currently exist, aiming to improve the quality of life for patients and families affected by these rare neurological disorders.

Ajax Therapeutics

Series C in 2024
Ajax Therapeutics is a biotechnology company based in New York City that focuses on developing innovative small molecule therapies for hematologic malignancies. The company utilizes computational chemistry and structure-based technologies to design drugs that target critical cytokine signaling pathways involved in these cancers. By integrating insights from disease biology, genetics, and structural biology with an advanced computational drug discovery platform, Ajax Therapeutics aims to create precisely designed therapeutics that address significant unmet medical needs for patients suffering from hematologic malignancies.

CRISPR Therapeutics

Post in 2024
CRISPR Therapeutics AG is a biotechnology company based in Zug, Switzerland, dedicated to developing transformative gene-based medicines for serious human diseases using CRISPR/Cas9 technology. This revolutionary gene-editing platform allows for precise changes to genomic DNA. The company's portfolio includes therapeutic programs targeting hemoglobinopathies, oncology, regenerative medicine, and rare diseases. Their lead product candidate is CTX001, a gene-edited therapy for transfusion-dependent beta thalassemia or severe sickle cell disease, which has been approved as Casgevy in collaboration with Vertex Pharmaceuticals. Additionally, CRISPR Therapeutics is developing CTX110, an allogeneic CAR-T therapy targeting CD19-positive malignancies, and other programs like CTX120 for multiple myeloma and CTX130 for solid tumors and hematologic malignancies. The company also engages in regenerative medicine programs for diabetes and genetic disease treatments such as glycogen storage disease Ia, Duchenne muscular dystrophy, and cystic fibrosis. CRISPR Therapeutics has strategic partnerships with Bayer Healthcare LLC, Vertex Pharmaceuticals Incorporated, and ViaCyte, Inc.

Aligos Therapeutics

Post in 2023
Aligos Therapeutics, Inc. is a clinical-stage biopharmaceutical company founded in 2018 and based in South San Francisco, California. The company is dedicated to developing innovative therapeutics to meet unmet medical needs in viral and liver diseases. Its primary focus is on chronic hepatitis B (CHB), with a robust pipeline that includes several drug candidates: ALG-010133, a synthetic oligonucleotide currently in Phase I clinical trials; ALG-000184, a capsid assembly modulator; ALG-020572, another oligonucleotide; and ALG-125097, an siRNA drug candidate. Additionally, Aligos is advancing ALG-055009, a small molecule THR-ß agonist aimed at treating non-alcoholic steatohepatitis (NASH). Aligos aims to leverage its expertise in liver diseases and viral infections to develop targeted antiviral therapies and establish itself as a leader in this therapeutic area.

ReCode Therapeutics

Series B in 2023
ReCode Therapeutics, Inc. is a biopharmaceutical company focused on developing precision medicines for pulmonary diseases, particularly targeting genetic conditions such as primary ciliary dyskinesia and cystic fibrosis. Founded in 2015 and based in Menlo Park, California, the company utilizes a groundbreaking selective organ targeting (SORT) lipid nanoparticle platform. This innovative technology facilitates the precise delivery of genetic therapies, including mRNA and gene correction therapeutics, to specific organs and cells beyond the liver. By overcoming limitations of traditional gene therapy approaches, ReCode Therapeutics aims to address the needs of patients with rare and life-limiting respiratory diseases, thus providing new treatment options for those affected by genetic disorders.

Actio Biosciences

Series A in 2023
Actio Biosciences specializes in developing precision medicines tailored to homogeneous rare patient populations. Its pipeline focuses on creating new drugs designed to enhance clinical success rates and ultimately deliver treatments to all patients in need, including those with challenging-to-cure illnesses.

Paratus Sciences

Series A in 2023
Paratus Sciences is a biotechnology company focused on enhancing human health and health security through the study of bat biology. By investigating the unique characteristics of the bat genome, the company aims to identify and develop therapeutics for various diseases. Leveraging insights gained from bat biology, Paratus Sciences seeks to enable patients to combat and potentially cure the diseases they face. Through its innovative approach, the company aspires to contribute significantly to advancements in medical treatments and public health.

Abeona Therapeutics

Post in 2022
Abeona Therapeutics is a clinical-stage biopharmaceutical company focused on developing gene and cell therapies for life-threatening rare genetic diseases. Its lead programs include EB-101, an autologous, gene-corrected cell therapy for recessive dystrophic epidermolysis bullosa; ABO-102, an adeno-associated virus-based gene therapy for Sanfilippo syndrome type A; and ABO-101, an AAV-based gene therapy for Sanfilippo syndrome type B. The company also develops therapies for Batten disease, cystic fibrosis, and genetic eye disorders. Additionally, Abeona Therapeutics is advancing the AIM Vector Platform, which includes over 100 next-generation AAV capsids for delivering gene therapies to various organs. The company operates a manufacturing facility producing therapies and vectors for preclinical and clinical studies.

2seventy bio

Post in 2022
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.

ReCode Therapeutics

Series B in 2021
ReCode Therapeutics, Inc. is a biopharmaceutical company focused on developing precision medicines for pulmonary diseases, particularly targeting genetic conditions such as primary ciliary dyskinesia and cystic fibrosis. Founded in 2015 and based in Menlo Park, California, the company utilizes a groundbreaking selective organ targeting (SORT) lipid nanoparticle platform. This innovative technology facilitates the precise delivery of genetic therapies, including mRNA and gene correction therapeutics, to specific organs and cells beyond the liver. By overcoming limitations of traditional gene therapy approaches, ReCode Therapeutics aims to address the needs of patients with rare and life-limiting respiratory diseases, thus providing new treatment options for those affected by genetic disorders.

Ajax Therapeutics

Venture Round in 2021
Ajax Therapeutics is a biotechnology company based in New York City that focuses on developing innovative small molecule therapies for hematologic malignancies. The company utilizes computational chemistry and structure-based technologies to design drugs that target critical cytokine signaling pathways involved in these cancers. By integrating insights from disease biology, genetics, and structural biology with an advanced computational drug discovery platform, Ajax Therapeutics aims to create precisely designed therapeutics that address significant unmet medical needs for patients suffering from hematologic malignancies.

Neurogene

Series B in 2020
Neurogene Inc., established in 2018 and headquartered in New York, specializes in developing genetic medicines for treating neurological disorders. The company focuses on utilizing adeno-associated virus (AAV) vectors to deliver therapeutic genes for conditions such as Charcot-Marie Tooth disease type 4J (CMT4J), Aspartylglucosaminuria (AGU), and an undisclosed Lysosomal Storage Disease (LSD). Neurogene aims to provide effective treatment options where none currently exist, aiming to improve the quality of life for patients and families affected by these rare neurological disorders.

Solid Biosciences

Post in 2020
Solid Biosciences Inc. is a life science company focused on developing therapies for Duchenne muscular dystrophy (DMD), a 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. In addition to SGT-001, Solid Biosciences is advancing the Anti-LTBP4 program, which involves a monoclonal antibody designed to reduce fibrosis and inflammation by targeting the LTBP4 protein. The company also develops biomarkers and sensors, as well as the Solid Suit program, which focuses on creating wearable assistive devices with functional and therapeutic benefits. Founded in 2013 and headquartered in Cambridge, Massachusetts, Solid Biosciences has established a strategic collaboration with Ultragenyx to enhance gene therapy development for DMD. With no current cure for DMD, the company aims to provide innovative solutions for a condition that affects an estimated 10,000 to 15,000 cases in the United States.

Neogene Therapeutics

Series A in 2020
Neogene Therapeutics, Inc., founded in 2018 and based in New York, develops innovative T cell therapies aimed at treating cancer. The company specializes in creating personalized engineered T cells that target mutated proteins, known as neo-antigens, found in cancer cells as a result of DNA mutations. By leveraging advanced technologies, Neogene isolates neo-antigen specific T cell receptor genes from tumor biopsies, which are routinely collected during cancer treatment. These tumor-infiltrating lymphocytes often express T cell receptors that can recognize and attack cancer cells displaying neo-antigens. Utilizing state-of-the-art DNA sequencing, synthesis, and genetic screening, Neogene's proprietary platform enables the identification of these specific T cell receptors with high sensitivity and at scale, ultimately enhancing the efficacy of cancer treatments.

Solid Biosciences

Post in 2019
Solid Biosciences Inc. is a life science company focused on developing therapies for Duchenne muscular dystrophy (DMD), a 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. In addition to SGT-001, Solid Biosciences is advancing the Anti-LTBP4 program, which involves a monoclonal antibody designed to reduce fibrosis and inflammation by targeting the LTBP4 protein. The company also develops biomarkers and sensors, as well as the Solid Suit program, which focuses on creating wearable assistive devices with functional and therapeutic benefits. Founded in 2013 and headquartered in Cambridge, Massachusetts, Solid Biosciences has established a strategic collaboration with Ultragenyx to enhance gene therapy development for DMD. With no current cure for DMD, the company aims to provide innovative solutions for a condition that affects an estimated 10,000 to 15,000 cases in the United States.

Neurogene

Series A in 2019
Neurogene Inc., established in 2018 and headquartered in New York, specializes in developing genetic medicines for treating neurological disorders. The company focuses on utilizing adeno-associated virus (AAV) vectors to deliver therapeutic genes for conditions such as Charcot-Marie Tooth disease type 4J (CMT4J), Aspartylglucosaminuria (AGU), and an undisclosed Lysosomal Storage Disease (LSD). Neurogene aims to provide effective treatment options where none currently exist, aiming to improve the quality of life for patients and families affected by these rare neurological disorders.

Avidity Biosciences

Series B in 2018
Avidity Biosciences, Inc. is a biopharmaceutical company based in La Jolla, California, specializing in the development of oligonucleotide-based therapies, particularly through its innovative Antibody Oligonucleotide Conjugates (AOC) platform. This technology aims to address the limitations of traditional oligonucleotide therapies by combining the tissue selectivity of monoclonal antibodies with the precision of oligonucleotide treatments. Avidity's lead product candidate, AOC 1001, targets myotonic dystrophy type 1, a rare genetic muscle disease. In addition to this, the company is advancing multiple programs focused on muscle-related conditions, including muscle atrophy, Duchenne muscular dystrophy, facioscapulohumeral muscular dystrophy, and Pompe disease. Furthermore, Avidity is expanding its research to include immune and other cell types, positioning itself at the forefront of biopharmaceutical innovation for serious diseases.

Codiak Biosciences

Series C in 2017
Codiak BioSciences is a clinical-stage biopharmaceutical company dedicated to developing exosome-based therapeutics, a novel class of medicines with the potential to address various diseases with significant unmet medical needs. The company employs its proprietary engEx Platform, which allows for the engineering and manufacturing of exosomes, leveraging their natural role as intercellular messengers. Codiak's pipeline includes product candidates such as exoSTING and exoIL-12, targeting diverse therapeutic areas including oncology, neuro-oncology, neurology, neuromuscular diseases, and infectious diseases. Additionally, the company collaborates with the Ragon Institute to explore the potential of its exoVACC platform for vaccines against SARS-CoV-2 and HIV. Founded in 2015 and headquartered in Cambridge, Massachusetts, Codiak aims to transform therapeutic approaches by harnessing the unique properties of exosomes.

Dicerna Pharmaceuticals

Post in 2017
Dicerna Pharmaceuticals is a biopharmaceutical company that specializes in the discovery and development of RNA interference (RNAi)-based therapeutics. The company focuses on innovative treatments for rare inherited liver diseases, viral infections, chronic liver diseases, and cardiometabolic conditions. Utilizing its proprietary GalXC RNAi technology platform, Dicerna is advancing several key product candidates, including nedosiran for primary hyperoxaluria, RG6346 for chronic hepatitis B, and programs targeting genetic liver diseases and cardiovascular conditions. Founded in 2007 and headquartered in Lexington, Massachusetts, Dicerna has established strategic collaborations with major pharmaceutical firms to enhance its research and development efforts.

Intellia Therapeutics

Series B in 2015
Intellia Therapeutics, Inc. is a genome editing company headquartered in Cambridge, Massachusetts, specializing in the development of therapeutics using the CRISPR/Cas9 technology. This innovative platform allows for precise alterations of genomic DNA, enabling the company to pursue treatments for a range of severe and life-threatening diseases. Intellia's pipeline includes both in vivo programs targeting liver diseases such as transthyretin amyloidosis and hereditary angioedema, as well as ex vivo programs focused on engineered cell therapies for oncological and autoimmune disorders. The company is also exploring treatments for conditions like primary hyperoxaluria Type 1, alpha-1 antitrypsin deficiency, and Hemophilia B. Intellia has established collaborations with several organizations, enhancing its research and development capabilities. Founded in 2014, Intellia holds a significant intellectual property portfolio related to the therapeutic applications of CRISPR/Cas9, aiming to address high unmet medical needs through its advanced gene-editing approaches.
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