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Antofagasta is a Chilean-based company primarily engaged in the mining sector, focusing on the exploration, extraction, and processing of copper. The company operates several mining sites in Chile, including the Los Pelambres, Centinela, Antucoya, and Zaldívar copper mines, and also has interests in transport and water distribution. Founded in the 1880s, its roots trace back to the Chilean nitrate and railway industries. Headquartered in Santiago, Chile, Antofagasta has established a significant geographic footprint in the region, enhancing its logistics efficiencies. The company's strategic focus on cost-efficient production and sustainable practices underscores its competitive strengths in the global minerals market.

BHP is a global diversified miner mainly supplying iron ore and copper. The merger of BHP Limited and Billiton PLC created the present-day BHP Group. The dual-listed structure from the 2001 BHP and Billiton merger was collapsed in 2022. Major assets include Pilbara iron ore and Escondida copper. Onshore US oil and gas assets were sold in 2018, and the remaining petroleum assets were spun off and merged with Woodside in 2022, with BHP vesting the Woodside shares it received to BHP shareholders. It purchased copper miner Oz Minerals in fiscal 2023 and half of the Vicuña copper joint venture in fiscal 2025. It is entering the potash market through the development of its Jansen project in Canada. However, due to low prices, BHP placed its nickel business on care and maintenance in 2024.