Capstone Mining Corp. is a Canadian mining company engaged in the exploration and production of base and precious metals in United States, Mexico, Canada, Chile and Australia. The Company operates through five segments, which include Pinto Valley (United States), Cozamin (Mexico), and Minto (Canada), Santo Domingo development project (Chile) and Other. Pinto Valley Mining Corp., a wholly owned United States subsidiary, owns and operates the copper Pinto Valley Mine located in Arizona, United States. Capstone Gold, S.A. de C.V., a wholly owned Mexican subsidiary, own and operates the copper-silver Cozamin Mine located in Zacatecas, Mexico. Minto Explorations Ltd., a wholly owned Canadian subsidiary, owns and operates the copper Minto Mine located in Yukon, Canada. Kutcho Copper Corp., a wholly owned Canadian subsidiary, owns the Kutcho copper-zinc project in British Columbia, Canada. The Company owns a 70% interest in the Santo Domingo copper-iron-gold project.