Eiger BioPharmaceuticals, Inc., a commercial-stage biopharmaceutical company, focuses on the development of therapies for hepatitis delta virus (HDV) and other serious diseases. The company offers Zokinvy for the treatment of Hutchinson-Gilford progeria syndrome and Processing-Deficient Progeroid Laminopathies. Its product candidates include Lonafarnib, an orally available, farnesylation inhibitor, which has completed Phase 3 clinical trials for HDV infection; Peginterferon Lambda (lambda), which is in clinical development for HDV; lambda, that is in phase II and III investigator studies of mild and moderate COVID-19; and Avexitide, which is in Phase II for the treatment of congenital hyperinsulinism and post-bariatric hypoglycemia. The company is headquartered in Palo Alto, California. On April 1, 2024, Eiger BioPharmaceuticals, Inc., along with its affiliates, filed a voluntary petition for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the Northern District of Texas.