The Sprott Uranium Miners ETF (URNM) primarily invests a minimum of 80% of its total assets in companies included in its benchmark index. This index is specifically designed to track businesses that dedicate a substantial portion—at least 50%—of their assets to either: (1) the direct activities of uranium mining, exploration, development, and production, or (2) related non-mining ventures such as holding physical uranium, owning uranium royalties, or providing other support services to the uranium industry. It's important to note that this fund is not diversified, concentrating its investments within this specific sector.