iTonic Holdings Ltd. is a healthcare solutions provider that develops and commercializes treatment software and devices for brachytherapy. Its proprietary treatment planning system supports radioactive particle implantation, a radiotherapy that places radioactive sources inside the patient to kill cancer cells and shrink tumors. The company offers FTTPS, a treatment planning system for various malignant tumors that can determine target volume, prescription dose, and dose limits for protecting organs at risk, producing a safe, effective, and accurate dose distribution plan for brachytherapy. The company was formerly known as Pheton Holdings Ltd and changed its name to iTonic Holdings Ltd. in January 2026. Founded in 1998, it is headquartered in Beijing, China, and operates as a subsidiary of ZJW (BVI) LTD.