Assembly Biosciences Raises $175 Million in Equity Financing

Tuesday, Aug 12, 2025 4:44 am ET1min read

Assembly Biosciences has completed a $175 million equity financing, generating net proceeds of $122 million. The funds will be used for general corporate purposes. The company is focused on developing small-molecule therapeutics for viral diseases such as herpesvirus, hepatitis B virus, and hepatitis delta virus infections. Assembly Biosciences faces financial challenges but has positive technical indicators and promising clinical trial results. The stock has a neutral rating from TipRanks' AI Analyst.

Assembly Biosciences, Inc. (Nasdaq: ASMB), a biotechnology company focused on developing innovative therapeutics for serious viral diseases, has successfully completed a $175 million equity financing round. The company announced the pricing of an underwritten, registered offering consisting of 5,591,840 shares of common stock and 1,040,820 pre-funded warrants, along with accompanying Class A and Class B warrants. Additionally, Gilead Sciences, Inc. participated through a private placement, purchasing 2,295,920 shares with accompanying warrants [1].

The total net proceeds from the offering and the private placement are expected to amount to $122 million, which Assembly Biosciences plans to use for general corporate purposes. The equity financing is a significant boost for the company, particularly as it aims to advance its pipeline of small-molecule therapeutics targeting herpesvirus, hepatitis B virus (HBV), and hepatitis delta virus (HDV) infections.

The offering attracted notable investors, including Commodore Capital, Blackstone Multi-Asset Investing, Farallon Capital Management, L.L.C., Janus Henderson Investors, and RA Capital Management. These investors, known for their expertise in healthcare-focused funds, signal confidence in Assembly Biosciences' pipeline and strategic direction [2].

The deal structure includes complex warrant terms. Each pre-funded warrant has a nominal exercise price of $0.001 per share of common stock and will be immediately exercisable. Class A warrants, exercisable on or after August 11, 2030, or upon the completion of enrollment in Assembly's Phase 2 clinical study, have an exercise price of $21.60 per share. Class B warrants, exercisable on or after November 15, 2026, with an expiration date of December 31, 2026, will automatically terminate if Assembly Bio secures $75 million in non-dilutive funding through a collaboration agreement [1].

The successful completion of this financing round underscores Assembly Biosciences' commitment to advancing its clinical pipeline and strengthening its financial position. Despite facing financial challenges, the company's positive technical indicators and promising clinical trial results provide a solid foundation for future growth.

References:
[1] https://www.biospace.com/press-releases/assembly-biosciences-announces-pricing-of-175-million-in-equity-financings
[2] https://www.stocktitan.net/news/ASMB/assembly-biosciences-announces-pricing-of-175-million-in-equity-lawa7d8ykro6.html

Assembly Biosciences Raises $175 Million in Equity Financing

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