Producer
Vulcan Materials
US's largest construction aggregates company (NYSE; not a cement producer). Operates limestone, granite, and other crushed stone quarries across the US. Operated a major limestone quarry in Quintana Roo, Mexico through subsidiary Sac Tun for 30+ years — shipping 62,000-tonne loads of crushed limestone by self-discharging vessels to Tampa, New Orleans, Houston, and Brownsville. This quarry and port terminal were physically seized by the Mexican government in 2022-2023 in a USMCA-contested expropriation, cutting off a major seaborne limestone supply route to the US Gulf Coast.
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Goods downstream
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Stories
What else they do
Business segments
The company's full revenue map, where this supply-chain role fits within their broader business.
Aggregates
77%Asphalt Mix
11%Concrete
8%Calcium
4%
Intelligence
What's known
Sourced claims about this company's role in supply chains, chokepoints, concentration, incidents, dual-use connections.
Did you know2024
Vulcan Materials operates a dedicated Calcium segment (hydrated lime and quicklime) alongside its road-gravel business. Hydrated lime is the primary chemical used in municipal drinking-water treatment plants to raise pH, remove heavy metals, and soften water — making Vulcan a silent supplier in every US city's water infrastructure. The same company that fills potholes also treats the tap water in dozens of metro areas. It also sells lime to steel mills as slag flux, linking the road-building aggregates sector to steelmaking and water utilities through a single quarry operation.
Vulcan Materials ↗Origin2023
Vulcan Materials grew from a Birmingham, Alabama limestone quarrying operation in 1909 into the US's largest construction aggregates company through aggressive acquisition of regional quarry chains across the Sun Belt. Its strategic moat is "permit legacy" — limestone deposits near urban centers that would be impossible to permit today, giving it near-monopoly pricing power for local infrastructure projects.
Vulcan Materials ↗