F-star Therapeutics, Inc., a clinical-stage biopharmaceutical company develops tetravalent bispecific antibodies for cancer therapy. Its medicines used in immuno-oncology treatments. The company plans for the initiation of a Phase I, open label, first-in-human clinical study of FS222, a bispecific antibody targeting CD137 (4-1BB) and PD-L1. The company is based in Cambridge, the United Kingdom.