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Martin Marietta is a leading US producer of construction aggregates, having produced roughly 200 million tons in 2025. Its aggregate reserves represent approximately 85 years of supply at 2025 production levels. Over the past several years, the company has increased its exposure to aggregates while reducing its presence in cement and downstream businesses such as concrete and asphalt. More recently, Martin Marietta expanded into an aggregate-adjacent business through its acquisition of Lhoist North America, the largest US producer of lime. The company operates across 28 states, with smaller operations in Canada and the Bahamas.

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.