Gilead Sciences, Inc., a biopharmaceutical company, discovers, develops, and commercializes medicines in the areas of unmet medical need in the United States, Europe, and internationally. The company provides Biktarvy, Genvoya, Descovy, Odefsey, Truvada, Complera/ Eviplera, Stribild, Sunlencs, and Atripla products for the treatment of HIV/AIDS; Veklury, an injection for intravenous use, for the treatment of COVID-19; and Epclusa, Harvoni, Vemlidy, and Viread for the treatment of viral hepatitis. It also offers Yescarta, Tecartus, and Trodelvy products for the treatment of oncology; Letairis, an oral formulation for the treatment of pulmonary arterial hypertension; and AmBisome, a liposomal formulation for the treatment of serious invasive fungal infections. The company has collaboration agreements with Arcus Biosciences, Inc.; Merck Sharp & Dohme Corp.; Pionyr Immunotherapeutics Inc.; Tizona Therapeutics, Inc.; Galapagos NV; Janssen Sciences Ireland Unlimited Company; Japan Tobacco, Inc.; Dragonfly Therapeutics, Inc.; Arcellx, Inc.; Everest Medicines; Merck & Co, Inc.; Tentarix Biotherapeutics Inc.; Marengo Therapeutics; and Assembly Biosciences, Inc. It also has research collaboration, option, and license agreement with Merus N.V. for the discovery of novel dual tumor-associated antigens (TAA) targeting trispecific antibodies. The company was incorporated in 1987 and is headquartered in Foster City, California.

Vir Biotechnology, Inc., an immunology company, develops therapeutic products to treat and prevent serious infectious diseases. Its clinical development pipeline consists of product candidates targeting hepatitis delta virus (HDV), hepatitis B virus (HBV), and human immunodeficiency virus (HIV). The company's preclinical candidates include those targeting influenza A and B, coronavirus disease 2019, respiratory syncytial virus (RSV) and human metapneumovirus (MPV), and human papillomavirus (HPV). The company has grant agreements with Bill & Melinda Gates Foundation and National Institutes of Health; an option and license agreement with Brii Biosciences Limited; a collaboration and license agreement with Alnylam Pharmaceuticals, Inc.; license agreements with MedImmune, LLC; collaboration with WuXi Biologics (Hong Kong) Limited and Glaxo Wellcome UK Ltd.; and a collaborative research agreement with GlaxoSmithKline Biologicals S.A, as well as license agreement with Sanofi for three clinical-stage masked T-cell engagers (TCEs) and exclusive use of the protease-cleavable masking platform for oncology and infectious diseases. It also has a manufacturing agreement with Samsung Biologics Co.,Ltd. The company was incorporated in 2016 and is headquartered in San Francisco, California.

Enanta Pharmaceuticals, Inc., a biotechnology company, discovers and develops small molecule drugs for the treatment of viral infections and liver diseases. Its product pipeline comprises EDP-514, which is in phase 1b clinical development for the treatment of chronic infection with hepatitis B virus or HBV; EDP-938 and EDP-323, which is in phase II clinical development for the treatment of respiratory syncytial virus; EDP-235, which is in phase II clinical development for the treatment of human coronaviruses; and Glecaprevir, which is in the market for the treatment of chronic infection with hepatitis C virus or HCV. The company has a collaborative development and license agreement with Abbott Laboratories to develop, manufacture, and commercialize HCV NS3 and NS3/4A protease inhibitor compounds, including paritaprevir and glecaprevir. Enanta Pharmaceuticals, Inc. was incorporated in 1995 and is headquartered in Watertown, Massachusetts.

Assembly Biosciences, Inc., a biotechnology company, develops therapeutic candidates for the treatment of viral diseases. It develops ABI-5366, a long-acting herpes simplex virus (HSV) helicase-primase inhibitor that is in Phase 1a/1b clinical trial to treat recurrent genital herpes; ABI-1179, which is in Phase 1a/1b clinical trial for the treatment of recurrent genital herpes; and ABI-6250, a small molecule orally bioavailable hepatitis delta virus entry inhibitor that is in Phase 1a clinical trial. The company also develops ABI-4334, a next-generation capsid assembly modulator, which is in Phase 1b clinical trial for the treatment of hepatitis B virus (HBV). In addition, it develops an oral non-nucleoside polymerase inhibitor targeting transplant-related herpesviruses; and a small molecule interferon-a receptor agonist targeting HBV and HDV. The company has collaboration agreements with Gilead Sciences, Inc. and BeiGene, Ltd. The company was formerly known as Ventrus Biosciences, Inc. and changed its name to Assembly Biosciences, Inc. in June 2014. Assembly Biosciences, Inc. was incorporated in 2005 and is headquartered in South San Francisco, California.

Barinthus Biotherapeutics plc, a clinical-stage biopharmaceutical company, engages in development of novel T cell immunotherapeutic candidates designed to guide the immune system to overcome chronic infectious diseases, autoimmunity, and cancer. The company's development pipeline includes VTP-300, an immunotherapeutic candidate under phase 2 studies as a potential component of a functional cure for chronic hepatitis B virus (HBV) infection; VTP-200, a non-surgical product candidate under phase 2 studies for treating persistent high-risk human papillomavirus (HPV) infection; VTP-1000, an autoimmune preclinical candidate designed to treat patients with celiac disease; VTP-1100 product candidate to target HPV16+ cancers; and VTP-850/850, a second-generation immunotherapeutic candidate under phase 2 studies to treat recurrent prostate cancer. It is also involved in the development of partnered candidates, such as AB-729-202, which is under phase 2a studies for the treatment of patients with chronic HBV infection; VTP-600, an immunotherapy candidate under phase 1 studies as a potential treatment for NSCLC in combination with standard of care treatment, chemotherapy, and pembrolizumab; VTP-500, a prophylactic vaccine product candidate under phase 1 studies to prevent infection and subsequent disease caused by the MERS coronavirus; and VTP-400, a prophylactic vaccine candidate under phase 1 studies to prevent shingles in adults aged 50 years and older. In addition, the company offers Vaxzevria (formerly VTP-900 and AZD1222), a prophylactic vaccine for the prevention of COVID-19 Infection. Further, it has license, research and development, and collaboration agreements with OUI, NIH, IMC, CanSino, CRUK; VOLT; and Arbutus. The company was formerly known as Vaccitech plc and changed its name to Barinthus Biotherapeutics plc in November 2023. Barinthus Biotherapeutics plc was founded in 2016 and is headquartered in Didcot, the United Kingdom.

Aligos Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on the development of novel therapeutics to address unmet medical needs in viral and liver diseases. Its drug candidate, ALG-055009, a small molecule THR-ß agonist that is in the Phase 2a clinical trial for the treatment of non-alcoholic steatohepatitis (NASH). The company also develops ALG-000184, a capsid assembly modulator, which is completed Phase 1b clinical trial to treat chronic hepatitis B (CHB); and ALG-125755, a siRNA drug candidate, which is in Phase I clinical trial for the treatment of CHB. In addition, it develops ALG-097558, which is in Phase 2 clinical trial for the treatment of coronavirus. The company has entered into license and research collaboration agreement with Merck to discover, research, optimize, and develop oligonucleotides directed against a NASH; license agreement with Emory University to provide hepatitis B virus capsid assembly modulator technology; license agreement with Luxna Biotech Co., Ltd. to develop and commercialize products containing oligonucleotides targeting hepatitis B virus genome; and research, licensing, and commercialization agreement with Katholieke Universiteit Leuven to develop coronavirus protease inhibitors. It also has a clinical collaboration with Xiamen Amoytop Biotech Co., Ltd. Aligos Therapeutics, Inc. was incorporated in 2018 and is headquartered in South San Francisco, California.

HOOKIPA Pharma Inc., a clinical stage biopharmaceutical company, develops immunotherapeutics targeting infectious diseases and cancers based on its proprietary arenavirus platform. The company's lead infectious disease product candidate is HB-200 for the treatment of pembrolizumab which is in Phase 2 of clinical trial; HB-700, a preclinical development for treatment of KRAS mutated cancers, including lung, colorectal, and pancreatic cancers. Its lead product candidates are HB-400 for the treatment of Hepatitis B which is in Phase I of clinical trial and HB-500 for the treatment of HIV which is in Phase I of clinical trial. The company's preclinical stage products include HB-300 program for prostate cancer. It has a collaboration with Gilead Sciences, Inc. to collaborate on preclinical research programs to evaluate potential vaccine products using or incorporating its replicating and non-replicating technology platforms for the treatment, cure, diagnosis, or prevention of Hepatitis B Virus. HOOKIPA Pharma Inc. was incorporated in 2011 and is headquartered in New York, New York.

Hepion Pharmaceuticals, Inc., a biopharmaceutical company, focuses on the development of drug therapy treatment for chronic liver diseases in the United States. It develops Rencofilstat, a cyclophilin inhibitor is in Phase 2b clinical trial to target multiple pathologic pathways involved in the progression of liver disease and treat non-alcoholic steatohepatitis (NASH), as well as preclinical studies of Rencofilstat shows reduction in liver fibrosis, liver inflammation, liver tumor burden, and titers of HBV, HCV, HDV, and HIV-1, and has demonstrated antiviral activities for hepatitis B, C, and D viruses through several mechanisms. The company was formerly known as ContraVir Pharmaceuticals, Inc. and changed its name to Hepion Pharmaceuticals, Inc. in July 2019. Hepion Pharmaceuticals, Inc. was incorporated in 2013 and is headquartered in Edison, New Jersey.