Radnostix Inc.

Radnostix Inc. manufactures a wide range of radioisotope-focused products for medical and industrial applications. The company was formed as a Texas corporation in 1995 and changed its name from International Isotopes Inc. to Radnostix, Inc. on December 23, 2025, following board approval on October 21, 2025, and shareholder approval on November 25, 2025. Its wholly-owned subsidiaries include International Isotopes Idaho Inc., International Isotopes Fluorine Products, Inc., International Isotopes Transportation Services, Inc., RadQual, LLC, RadVent, LLC, and TI Services, LLC. The company operates through five reportable segments: Theranostics Products, Cobalt Products, Calibration & Reference Products (formerly Nuclear Medicine Standards), Medical Devices, and Fluorine Products. The Theranostics Products segment focuses on the production and distribution of isotopically pure radiopharmaceuticals, Active Pharmaceutical Ingredients (APIs), and radiochemicals. These products are used in medical, industrial, and research applications and are produced from radioisotopes supplied by vendors. Radnostix Inc. offers these products in customized volumes, concentrations, chemical formulations, packages, and specifications to meet FDA requirements or customer demands. The company states that its FDA-approved generic sodium iodide I-131 drug product is the only generic product of its type manufactured in the U.S.