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Precision BioSciences, Inc., an advanced gene editing company, develops in vivo gene editing therapies for gene edits, including gene elimination, insertion, and excision in the United States. The company offers ARCUS, a genome editing platform to DNA genome insertion, deletion, and repair. It also provides PBGENE-HBV for the treatment of chronic hepatitis B virus (HBV) to eliminate covalently closed circular DNA with direct cuts and edits as well as to inactivate integrated HBV DNA with the goal of long-lasting reductions in hepatitis B surface antigen; PBGENE-PMM for the treatment of m.3243 associated primary mitochondrial myopathy (PMM) which is expected to submit an IND and/or CTA. In addition, it develops PBGENE-NVS for sickle cell disease/beta thalassemia for insertion; PBGENE-DMD (excision) for duchenne muscular dystrophy; PBGENE-LL2 (insertion), a liver directed target; PBGENE-LL3, a central nervous system directed target; and iECURE-OTC (insertion) for ornithine transcarbamylase deficiency. The company has license and collaboration agreement with Caribou Biosciences, Inc.; license agreement with TG Cell Therapy, Inc. to develop, manufacture, and commercialize azer-cel for autoimmune diseases and other indications outside of cancer; development and license agreement with Eli Lilly and Company for the research and development of potential in vivo therapies for genetic disorders; Cellectis S.A.; iECURE, Inc. to develop ARCUS-based gene-insertion therapies; Duke University; and Novartis Pharma AG to discover and develop in vivo gene editing products. Precision BioSciences, Inc. was incorporated in 2006 and is headquartered in Durham, North Carolina.

aTyr Pharma, Inc., a biotherapeutics company, engages in the discovery and development of medicines based on novel immunological pathways in the United States. Its lead therapeutic candidate is efzofitimod, a selective modulator of NRP2 that is in Phase III clinical trial for pulmonary sarcoidosis; and in Phase 1b/2a clinical trial for treatment of other interstitial lung diseases (ILDs), such as chronic hypersensitivity pneumonitis and connective tissue disease related ILD. The company is developing ATYR0101, a fusion protein derived from a domain of aspartyl-tRNA synthetase that is in preclinical development for the treatment of fibrosis; and ATYR0750, a domain of alanyl-tRNA synthetase for the treatment of liver disorders. It has collaboration and license agreement with Kyorin Pharmaceutical Co., Ltd. for the development and commercialization of efzofitimod for ILDs in Japan. aTyr Pharma, Inc. was incorporated in 2005 and is headquartered in San Diego, California.

Surrozen, Inc., a clinical stage biotechnology company, discovers and develops drug candidates to selectively modulate the Wnt pathway for tissue repair and regeneration. The company is developing antibody-based therapeutics with application across various disease areas, including diseases of the intestine, liver, retina, cornea, lung, kidney, cochlea, skin, pancreas, and central nervous system. Its products in pipeline include SZN-043, a hepatocyte-specific R-spondin mimetic bispecific fusion protein, which is in Phase 1b clinical trial for the treatment of severe liver diseases, including alcoholic hepatitis and asialoglycoprotein receptor 1; and SZN-1326, a bi-specific antibody, which is in Phase 1b clinical trial for the treatment of moderate to severe inflammatory bowel disease, Frizzled, and LRP receptors. The company also develops SZN-413, a Fzd4 targeted bi-specific antibody, which is in preclinical stage for the treatment of retinal vascular associated diseases. Surrozen, Inc. has collaboration and license agreement with Boehringer Ingelheim International GmbH to research, develop, and commercialize Fzd4 bi-specific antibodies. Surrozen, Inc. was founded in 2015 and is based in South San Francisco, California.

Surface Oncology, Inc., a clinical-stage immuno-oncology company, engages in the development of cancer therapies in the United States. The company develops various antibodies that include NZV930, a fully human immunoglobulin isotype G4 monoclonal antibody for the production of extracellular adenosine; SRF617, a fully human IgG4 monoclonal antibody that inhibits CD39 enzymatic activity for the production of adenosine and the breakdown of adenosine triphosphate; SRF388 which is in phase II clinical trial targeting interleukin 27; GSK4381562, an antibody targeting CD112R, an inhibitory protein expressed on natural killer and T cells; and SRF114 that is in phase 1/2 clinical trials targeting the chemokine receptor CCR8. Surface Oncology, Inc. has a license agreement with GlaxoSmithKline Intellectual Property (No. 4) Limited and Vaccinex, Inc. to develop, manufacture, and commercialize antibodies, which targets SRF114. The company was incorporated in 2014 and is headquartered in Cambridge, Massachusetts. As of September 8, 2023, Surface Oncology, Inc. operates as a subsidiary of Coherus BioSciences, Inc.