Altos Hornos de Mexico S.A. AHMSA
AHMSA.MX
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- Altos Hornos de México, S.A.B. de C.V. (AHMSA) operates as Mexico's largest integrated steel producer, manufacturing a broad range of flat and non-flat steel products including hot rolled coils for machinery parts and automotive applications; wide plates in coils or sheets for pressure vessels, structures, and heavy machinery; cold rolled coils; tinplate and tin-free steel; structural shapes for construction such as welded beams, bridges, and buildings; heavy shapes; and railroad tanks. The company maintains a fully integrated supply chain with iron ore and coal mining operations through subsidiaries like Minera del Norte (MINOSA), supporting an annual production capacity exceeding 3.5 million metric tons of liquid steel at its primary facilities in Monclova, Coahuila. AHMSA serves diverse sectors including construction, automotive, energy, infrastructure, and manufacturing, with primary markets in Mexico and exports facilitated by its proximity to the U.S. border. Founded in 1942 and headquartered in Monclova, Coahuila, Mexico, AHMSA began steel production in 1944 amid wartime shortages, evolving through expansions like cold-rolling mills, coking plants, and basic oxygen furnaces. The company, controlled by Grupo Acerero del Norte, S.A. de C.V., employs over 19,000 workers across its steelmaking and mining units and operates blast furnace, basic oxygen furnace, and electric arc furnace technologies. In recent developments, AHMSA ceased operations in late 2022 due to unpaid electricity bills and entered commercial bankruptcy proceedings in 2023, culminating in a formal bankruptcy declaration in November 2024. Assets, appraised at approximately $1.33 billion including steel plants, rolling mills, and MINOSA mining operations, are slated for auction with processes advancing as of December 2025; an auction is set for December with potential sale by January 2026. Interest has emerged from global and local firms such as ArcelorMittal, Ternium, Nippon Steel, Villacero, and Cargill, amid efforts to address over $1.6 billion in debts to workers and creditors while preserving asset integrity. Earlier attempts, including a 2024 agreement by Grupo Acerero del Norte to sell a majority stake for $200 million to foreign investors and proposals from Argentem Creek Partners, have not materialized, complicating restarts estimated at $350 million minimum.