This Bureau of Mines paper investigates, explores, and analyzes the corporate structure dynamics and financial ratios to evaluate the economic health of the U.S. copper producers. It highlights the corporate policy options and measures of corporate profitability and suggests that a competitive domestic copper industry will exist in the future. The study highlights the activities of 14 selected major copper-producing companies, including their subsidiaries or affiliates, that were responsible for more than 95 percent of the total U.S. production in each of the years since 1969. The selected firms are not all primarily in the business of producing copper. Several of the large producers are classified by the financial institutions as integrated oil and gas enterprises.