Sonnet BioTherapeutics Holdings, Inc. was incorporated in Delaware on October 21, 1999. The company is a clinical-stage biopharmaceutical firm leveraging its proprietary FHAB (Fully Human Albumin-Binding) platform to develop novel biologic therapies. FHAB technology combines fully human single-chain antibody fragments (scFvs) with one or two therapeutic payloads, enabling either single or dual-targeting mechanisms of action. A key feature of the FHAB design is a specialized domain that binds to human serum albumin (HSA), effectively 'hitching a ride' through the bloodstream to reach target sites such as solid tumors or lymphatic tissues. This approach enhances drug accumulation in specific tissues while extending the duration of therapeutic activity in the body. FHAB-based candidates are produced in mammalian cell cultures, allowing for natural glycosylation patterns that help minimize immunogenicity risks. With its versatile and innovative platform, Sonnet BioTherapeutics is well-positioned to advance treatments across a range of human diseases, including oncology, autoimmune disorders, infectious diseases, inflammation, and hematology. Company website: http://www.sonnetbio.com Company address: 100 Overlook Center Suite 102 Princeton NJ 08540

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