hepatitis-b
(3)
Dynavax Technologies
Dynavax Technologies is an Emeryville, California biopharmaceutical company built around CpG 1018, a proprietary vaccine adjuvant that sharpens the immune system's response. Its flagship product, HEPLISAV-B, is the first and only two-dose adult hepatitis B vaccine approved in the U.S. and Europe, and had grown to roughly 44% U.S. market share by the end of 2024. Beyond hepatitis B, Dynavax licenses CpG 1018 to other vaccine developers - most visibly as an ingredient in several COVID-19 vaccines - and has advanced its own pipeline in shingles, plague, pandemic influenza, and Lyme disease. In December 2025 Sanofi agreed to acquire Dynavax for about $2.2 billion; the deal closed in February 2026.
AusperBio
AusperBio is a clinical-stage biopharmaceutical company operating in the United States and China that develops antisense oligonucleotide (ASO) therapies aimed at a functional cure for chronic hepatitis B. Built on its proprietary Med-Oligo ASO platform and targeted delivery technology, its lead candidate AHB-137 is an unconjugated ASO advancing into Phase III trials in China, with early data showing a 30% functional cure rate in a subset of patients. Founded in 2019 and headquartered in San Mateo, California, the company has raised over $200 million to date.
Tune Therapeutics
Tune Therapeutics is a genetic-medicine company building tools to turn genes up or down without cutting DNA. Its TEMPO epigenetic-editing platform tunes gene expression the way a sound engineer rides a fader - reversible, programmable, and precise. Spun out of Duke's Gersbach Lab, Tune raised over $175M in Series B financing in January 2025 and is running first-in-human trials of TUNE-401, an epigenetic silencer for chronic hepatitis B, with the larger ambition of editing the genome's software to extend human healthspan.