Hamilton Industrials, Inc. is an American multinational corporation based in Denver, Colorado, United States, with subsidiaries involved in manufacturing, trading, and investments. It was originally founded as Colorado River Oil and Gas Company in 1945, and later as Rocky Mountain Oil and Refining Company. Hamilton companies are involved in core industries such as the manufacturing, refining, and distribution of petroleum, chemicals, energy, fiber, intermediates and polymers, minerals, fertilizers, pulp and paper, chemical technology equipment, ranching, finance, commodities trading, and other ventures and investments. The firm is believed to employ about 60,000 people in the United States and another 40,000 in 59 other countries.