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Arizona Sonoran Copper Company is engaged in the development and production of copper, focusing on mineral exploration. The company holds interests in the Cactus Project, situated in Pinal County, Arizona, southeast of the Phoenix metropolitan area. This project is located on private land, underscoring the company's commitment to advancing its operations in a region rich in copper resources.

Copper Mountain Mining Corporation is a Canadian mining company that specializes in the exploration and production of copper, gold, and silver. Established in 2006 and headquartered in Vancouver, the company’s primary asset is the Copper Mountain mine located near Princeton, British Columbia. This mine encompasses a substantial area of 6,702.1 hectares, including various mineral claims and mining leases. The company also holds additional projects in Peru and the United States, emphasizing its focus on operating in secure, investment-grade jurisdictions. Copper Mountain Mining aims to enhance its value by pursuing successful exploration, project development, and efficient operations while maintaining a diversified portfolio to manage risks effectively.

Mason Resources Corp. is a Canadian exploration stage company focused on acquiring, exploring, and evaluating mineral properties in the United States, particularly targeting copper. The company's primary asset is the Ann Mason copper-molybdenum porphyry project located in the Yerington district of Nevada, which features significant deposits and is recognized as one of the largest undeveloped copper resources in North America. The Ann Mason Project is at the preliminary economic assessment stage and includes multiple prospective targets. Additionally, Mason Resources owns the Lordsburg copper-gold porphyry property in southwest New Mexico, an earlier-stage project situated in a historically rich mining area. The company benefits from strong infrastructure, year-round access, and community support in its operational region, contributing to its strategic advantages in mineral exploration and development. Mason Resources was incorporated in 2017 and is headquartered in Vancouver, Canada.

Augusta Resource Corporation, a development stage company, is engaged in the acquisition, exploration, and development.

Norsemont Mining, Inc. is engaged in the acquisition, exploration, and development of mineral deposits, with a focus on copper. The company provides services that facilitate the identification and assessment of valuable mineral resources. Through its mining operations, Norsemont aims to enhance its portfolio by discovering and developing new copper assets, contributing to the broader mining sector.