TerraPower Isotopes (TPI) develops methods and radioisotope generators to increase the supply of actinium-225, an isotope used as starting material in research and drug development for targeted cancer therapies. Its work includes extracting research-grade actinium-225 and supporting pharmaceutical companies’ research and development efforts. TerraPower describes TPI as collaborating with private industry and government, and its fact sheet identifies the isotope as intended for further manufacturing rather than as a cGMP-manufactured product.