Press Release

Seismic Therapeutic Closes $121 Million Series B

December 4, 2023

Boston – December 4, 2023 – Cooley advised Seismic Therapeutic, a biotechnology company using machine learning to make a major shift in how immunology therapies are discovered and developed, on the close of its Series B financing at $121 million. Partners Michael Rohr and Marc Recht led the Cooley team advising Seismic.

The financing was led by new investor Bessemer Venture Partners, with participation from other new investors – Amgen Ventures, Codon Capital, Alexandria Venture Investments, Gaingels and GC&H – as well as existing investors Timothy A. Springer, Lightspeed Venture Partners, Polaris Partners, Boxer Capital, GV, Samsara BioCapital, and management and founders.

Proceeds from the financing will be used to advance Seismic’s two lead programs – a pan‑immunoglobulin (Ig) G protease sculpting (Sc) enzyme candidate (S-1117) and a PD-1 agonist:Fc gamma receptor IIb selective dual-cell bidirectional (DcB) antibody candidate (S-4321) – through phase 1 proof-of-mechanism trials, and enable the continued growth of its pipeline in the IgSc and DcB product areas beyond the lead programs. Seismic also will use the funding to further expand its proprietary machine learning-enabled IMPACT platform with the development and implementation of additional cutting-edge methods to enhance biologics drug discovery in immunology.

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