Bolt Biotherapeutics Raises $93.5 Million Series C Financing

Bolt Biotherapeutics, Inc., a clinical-stage biotechnology company developing its Immune-Stimulating Antibody Conjugate (ISAC) platform technology to harness the power of the innate immune system to treat cancer, today announced the closing of an oversubscribed $93.5 million Series C financing. Led by Sofinnova Investments, the Series C financing included participation from new investors RA Capital Management, Surveyor Capital (a Citadel Company), Rock Springs Capital, Samsara BioCapital and Pfizer Ventures as well as existing investors Novo Holdings, Vivo Capital, Pivotal bioVenture Partners and others. Bolt is pioneering a new category of immunotherapies that combine the precision of antibody targeting with the power of the innate immune system via activating myeloid cells and reprogramming the tumor microenvironment. Bolt has raised more than $170 million since its founding in 2015, and this new round of funding will support the continued clinical development of its lead ISAC, BDC-1001, which is delivered systemically as monotherapy for HER2-expressing cancers. The financing will also support the expansion of the company's pipeline of Boltbody™ therapeutics. Bolt's expertise in myeloid biology lays the foundation for its innovative work developing proprietary innate immune stimulants for use in ISACs.