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Martin Marietta Materials is one of the United States' largest producer of construction aggregates (crushed stone, sand, and gravel). In 2024, Martin Marietta sold 191 million tons of aggregates. Martin Marietta's most important markets include Texas, North Carolina, Colorado, California, and Georgia, accounting for most of its sales. The company also uses its aggregates in its asphalt and ready-mixed concrete businesses. Martin's magnesia specialties business produces magnesia-based chemical products and dolomitic lime.
Entergy is a holding company with five regulated integrated utilities that generate and distribute electricity to about 3 million customers in Arkansas, Louisiana, Mississippi, and Texas. It is one of the largest power producers in the country with 24 gigawatts of rate-regulated owned and leased power generation capacity. Entergy was the second-largest nuclear owner in the US before it began retiring and selling its plants in the Northeast in 2014. It sold its two small gas utilities in Louisiana in 2025.