| ARKANSAS STEEL ASSOCIATES,LLC | Steel mini mill (Manufacturing of railroad tie plates) | Steel | U.S.A. |
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| ASAMA COLDWATER MANUFACTURING INC. | Automotive components manufacturer (Brake rotor, Brake drum, etc.) | Automotive | U.S.A. |
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| ASCEND SC, LLC | A consulting firm for Supply Chain Management operations and acceleration of digital transformation（DX） | Steel | U.S.A. |
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| B&L PIPECO SERVICES, INC. | Distribution and service of OCTG and related products | Steel | U.S.A. |
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| COSMOTEC INTERNATIONAL ESPECIALIDADES COSMETICAS LTDA | Distribution of cosmetic raw materials and development of formulation recipe for the cosmetic and personal care markets | Chemical Solutions | Brazil |
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| EDGEN GROUP INC. | Distribution and service of Pipe, Valve, Fittings and related components | Steel | U.S.A. |
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| GERDAU SUMMIT ACOS FUNDIDOS E FORJADOS S.A. | Manufacture and sales of forging and casting products for industries | Steel | Brazil |
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| HIROTEC MEXICO, S.A DE C.V. | Manufacture and Sales of body and exhaust parts for automobiles | Automotive | Mexico |
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| INTERACID TRADING (CHILE) S.A. | Sales of sulfuric acid and operation of sulfuric acid tank terminals in Chile. | Chemical Solutions | Chile |
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| KIMURA FOUNDRY AMERICA, INC | Manufacture of prototype casting using 3D printing technology | Steel | U.S.A. |
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| KIRIU MEXICANA, S.A. DE C.V. | Automotive components manufacturer (Brake rotor, Brake drum, etc.) | Automotive | Mexico |
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| KIRIU USA, LLC | Automotive components manufacturer (Brake rotor, etc.) | Automotive | U.S.A. |
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| MINERACAO USIMINAS S.A. | Exploitation, production and sales of iron ore in Minas Gerais, Brazil | Mineral Resources | Brazil |
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| P2 ENERGY SERVICES, LLC | Distribution and service of OCTG and related products | Steel | U.S.A. |
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| PRESIDIO VENTURES, INC. | Venture Capital Investment in North America | Media & Digital | U.S.A. |
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| S AND L CONSULTING USA, INC. | Consulting and Engineering for OCTG | Steel | U.S.A. |
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| SACONIX LLC | Sales of sulfuric acid and operation of sulfuric acid tank terminals in the U.S. | Chemical Solutions | U.S.A. |
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| SAWAI AMERICA, LLC | US generics manufacturing and sales | Chemical Solutions | U.S.A. |
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| SC AUTOMOTIVE ENGINEERING USA, INC. | Developing automotive engineering business | Automotive | U.S.A. |
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| SC MINERALS AMERICA INC. | SCMA conducts investment management and administration for copper mines which SMMAZ invests in. | Mineral Resources | U.S.A. |
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| SCMI US INC. | Trading of precious metals, base metals and Derivative sales | Mineral Resources | U.S.A. |
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| SERVILAMINA SUMMIT MEXICANA S.A. DE C.V. | Steel service center (Steel process and sales) | Steel | Mexico |
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| SMS EQUIPMENT (ALASKA) INC. | Dealer of Komatsu and other equipment in Alaska, the United States | Transportation & Construction Systems | U.S.A. |
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| SMS EQUIPMENT INC. | Dealer of Komatsu and other equipment in Canada | Transportation & Construction Systems | Canada |
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| SULPHURIC ACID TRADING COMPANY, INC. | Sales of sulfuric acid and operation of sulfuric acid tank terminals in the U.S. | Chemical Solutions | U.S.A. |
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| SUMISHO GLOBAL LOGISTICS (USA) CORPORATION | Global Logistics Service Provider | Diverse Urban Development | U.S.A. |
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| SUMMIT AGRO MEXICO S.A. DE C.V. | Distribution of crop protection products in Mexico | Chemical Solutions | Mexico |
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| SUMMIT AGRO SOUTH AMERICA SPA | Investment in crop protection business in South America | Chemical Solutions | Chile |
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| SUMMIT AGRO USA, LLC | Distribution of crop protection products in the U.S.A. | Chemical Solutions | U.S.A. |
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| SUMMIT-AGRO ARGENTINA S.A. | Distribution of crop protection products in Argentine | Chemical Solutions | Argentina |
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| Werner Aero, LLC | an aircraft end-of-life solution provider | Transportation & Construction Systems | U.S.A. |
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| WEST ODESSA RAIL LOGISTICS, LLC | Operation of Summit Industrial Park（West Texas Tubular Distribution Center） | Steel | U.S.A. |
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