Shanghai – September 21, 2025 – Cooley advised AusperBio, a privately held, clinical-stage biotechnology company dedicated to advancing targeted oligonucleotide therapies to achieve a functional cure for chronic hepatitis B (CHB), on its $63 million Series B2 financing. The round was co-led by Qiming Venture Partners and a globally renowned strategic investor, with additional participation from HanKang Capital, CDH Investments, YuanBio Venture Capital, Sherpa Capital and Genesis Capital.

Proceeds from the financing will be used to advance the clinical development of AHB-137, AusperBio’s lead product candidate, including the ongoing pivotal trial, multiple Phase II combination studies and expansion into global Phase II development. The funds will also support further advancement of the company’s proprietary Med-Oligo antisense oligonucleotide (ASO) platform, progression of its preclinical pipeline, scaling up of commercial manufacturing partnerships and long-term pipeline growth.

Lawyers Andrew Harline, Michael Shen and Lunga Su led the Cooley team advising AusperBio.

Cooley previously advised AusperBio on its $50 million Series B+ in May 2025, its $73 million Series B in December 2024 and its $37 million Series A in July 2024.

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