Assembly Biosciences, Inc. operates as a clinical-stage biotechnology company in the United States. The company develops oral therapeutic candidates for the treatment of hepatitis B virus (HBV) infection. Its product candidates include Vebicorvir to treat patients with chronic HBV infection; ABI-H2158, which is in Phase II clinical study for chronic HBV infection; ABI-H3733 that has completed Phase Ia clinical study for the treatment of HBV. The company has collaboration agreements with Allergan Pharmaceuticals International Limited; BeiGene, Ltd.; and Arbutus Biopharma Corporation, as well as strategic license agreements with Indiana University Research and Technology Corporation; and Door Pharmaceuticals, LLC. The company was formerly known as Ventrus Biosciences, Inc. and changed its name to Assembly Biosciences, Inc. in June 2014. Assembly Biosciences, Inc. was founded in 2005 and is headquartered in South San Francisco, California.