ArcelorMittal was formed in 2007 from the $33 billion acquisition of
Arcelor by
Mittal Steel Company. The merger was consummated after Mittal Steel Company raised its bid for Arcelor and the Mittal family agreed to relinquish its controlling stake in the company and execute a
standstill agreement not to acquire a controlling interest without approval from independent directors. The resulting firm produced approximately 10% of the world's steel, and was at that time the largest steel company worldwide. In August 2007, the company acquired Sicartsa, operator of a plant in Mexico, from Grupo Villacero for $1.44 billion. In October 2007, the company acquired 90% of Rongcheng Chengshan Steelcord, a Chinese steel wire company, for $26.6 million. In November 2007, the company increased its stake in China Oriental Group to over 73%, becoming the first foreign company to control a steel mill in China. In April 2008, the company, in partnership with its joint venture partner
Nippon Steel announced a $240 million investment to double
galvanized production capacity at their I/N Kote with the addition of a new $240-million continuous galvanizing line. In December 2008, the company sold the
Bethlehem Steel plant in
Lackawanna, New York and the Sparrows Point Mill to
Severstal, to satisfy conditions for regulatory approval of the merger with
Arcelor. In December 2008, during the
Great Recession, the company closed its steel mill in
Hennepin, Illinois. In 2017, it was demolished. In July 2009, the company acquired Noble's European Laser Welded Operations as part of the bankruptcy of Noble International. In January 2011, the company completed the
corporate spin-off of its
stainless steel division,
Aperam. In May 2012, the company sold Skyline Steel and Astralloy to
Nucor for $605 million. , due to overcapacity and reduced demand in Europe, it had idled 9 of 25 blast furnaces. In October 2012, it permanently shut down two blast furnaces in
Florange,
France. However, it revived them two months later when it agreed with the French government on a substantial investment. In May 2013, the company sold a 15% interest in its
Labrador Trough iron ore mining and infrastructure asset to
Posco and
China Steel for $1.1 billion. On 26 February 2014, ThyssenKrupp sold its carbon steel facility in
Calvert, Alabama to ArcelorMittal and
Nippon Steel for $1.55 billion. The facility was renamed AM/NS Calvert through the 50/50 joint partnership with
Nippon Steel & Sumitomo Metal Corp. In June 2025, Nippon Steel sold its 50% stake in the facility to ArcelorMittal and the facility was renamed ArcelorMittal Calvert. In September 2014, ArcelorMittal and
Gerdau sold Gallatin Steel to
Nucor for $770 million. In February 2016, the company sold its 35% stake in Gestamp Automacion to the Riberas family for €875 million. In June 2016, the company announced the launch of a new high strength steel. In February 2017, ArcelorMittal and Votorantim announced plans to combine their long steel operations in
Brazil. Under the deal,
Votorantim Siderurgia became a subsidiary of ArcelorMittal Brasil. In 2017, ArcelorMittal and the
Steel Authority of India Ltd (SAIL) agreed on preliminary terms to form a $913 million joint venture to export a fifth of the auto-grade steel made by the venture. In March 2017, the company proposed a US$6.5 billion steel project in
Karnataka, after entering into a pact with the Karnataka government in February 2017. In April 2017, the company sold Georgetown Steelworks in
South Carolina to
Sanjeev Gupta's
Liberty House Group. In November 2018, a consortium led by ArcelorMittal acquired
Ilva, owner of the
Taranto steelworks in
southern Italy, which has Europe's largest steel output, for €1.8 billion. To receive approval, the consortium agreed to invest €2.4 billion into Ilva, renamed ArcelorMittal Italia, while the state agreed to invest €2 billion. ArcelorMittal accused the state of not investing the agreed-upon amount and, in February 2024, Italy's industry minister took control of the venture in a manner similar to a bankruptcy, after an increase in energy prices and a drop in rolled steel coil prices led the venture to accumulate huge debts. In March 2019, the company, in partnership with
Nippon Steel, acquired
Essar Steel, which had filed for bankruptcy protection. In July 2019, the company sold seven major steelworks and five service centers in seven European countries to
Sanjeev Gupta's
Liberty House Group. In August 2019, the company took over management of Hibbing Taconite, of which it owns 62.3%, from
Cleveland-Cliffs. Also in August 2019, the company acquired Legault Métal. In December 2020, the company sold ArcelorMittal USA, which had 2019 revenues of $17 billion, to
Cleveland-Cliffs for approximately $1.4 billion. In March 2022, the company acquired John Lawrie Metals, a metals recycler in Scotland. In May 2022, the company acquired 10 scrap yards in the south of Germany. In July 2022, the company acquired an 80% interest in
Voestalpine's
hot-briquetted iron plant near
Corpus Christi, Texas, based on a $1 billion valuation. In December 2022, the company acquired Riwald Recycling. In March 2023, the company acquired Companhia Siderúrgica do Pecém, owner of a 3-million-metric-ton blast furnace and slab plant in northeastern Brazil, for $2.2 billion. In April 2023, the company's joint venture with Nippon Steel acquired Indian Steel Corporation, which had filed for bankruptcy protection. In December 2023, the company sold its assets in
Kazakhstan, the
Temirtau steel mill and the Aktau pipe plant, for $286 million to a Kazakh state-owned investment fund. In August 2024, ArcelorMittal acquired a 27.5% interest in
Vallourec, a producer of seamless steel tubes, from funds managed by
Apollo Global Management for €955 million. In 2025, the company's South Africa division ended production of long steel products due to high logistic and energy costs. In July 2025, ArcelorMittal announced the closure of a wire mill in Hamilton Ontario affecting 153 jobs. In September 2025, ArcelorMittal announced the closure of the
Hunedoara steel works in Hunedoara, Romania due to high energy costs and low amount of orders, affecting 477 jobs. Following the closure, politicians called for a review of the privatization contract, a statutory audit, involvement of the Ministry of Finance, and a consolidated report. ==Predecessor companies==