Yarrow Bioscience, Inc. operates as a clinical-stage biotechnology company that engages in developing transformative therapies for autoimmune thyroid diseases. The company's candidate, YB-101, is a humanized monoclonal antibody targeting the thyroid-stimulating hormone receptor (TSHR) for the treatment of Graves' disease and thyroid eye disease. The company was incorporated in 2025 and is based in New York, New York.