Greencastle Resources Ltd. is a diversified company with interests in gold and base metal exploration and oil and gas exploration and royalties. It also has strategic investments in other companies. Its segments include investments in private and public companies, oil and gas interests, and mining interests. The Company's investment segment comprises its investment in marketable securities and investment in private and public companies. The oil and gas segment comprises its oil and gas interests. The mining segment comprises its mining interests in Canada and in the United States of America. It has a royalty interest in one oil and gas property in Alberta. It holds a royalty interest in wells located in the Spirit River area, NW Alberta. The Company holds 50% interest in a 95% interest held by Criterium Energy in a quarter section of land in Alberta, called the Ferrier Project. It also holds an interest in the Jewel Ridge property lease.