| AB Tube Processing, Inc.(U.S.) | Tube processing for airbag inflators |
| Alcedo SRL(Romania) | Integrated supply of agricultural materials in Romania |
| Appak LLP(Kazakhstan) | Development of uranium mine in Kazakhstan and production/sale of uranium ore concentrates |
| Arkansas Steel Associates LLC(U.S.) | Steel mini mill (Manufacturing of railroad tie plates) |
As Balti Ehitusmasin-Baltem (Estonia) | Sale of Komatsu construction machinery in Estonia |
| Asian Steel Company Ltd.(Singapore) | Shearing, slitting, and sale of steel plates |
Australian Bulk Alliance Pty., Ltd. (Australia) | Grain collection of cargo and Keeping business |
Bara Sumi-Thai Leasing (Thailand) | Automotive finance company |
| Bluewell Insurance (Singapore) Pte. Ltd.(Singapore) | Captive insurance company |
| Bluewell Reinsurance Company (Bermuda) Ltd. | Reinsurance company(Rent-a-Captive) |
C & O Pharmaceutical Technology (Holdings) Limited (Bermuda Islands) | R & D, manufacture, import, and sale of pharmaceutical products |
| Calamba Steel Center Inc.(Philippines) | Shearing, slitting, and sale of steel plates |
Cantex Inc. (U.S.) | Manufacturing and sales of polyvinyl chloride pipes |
Chongqing Sumisho Yunxin Logistics Co., Ltd. (China) | Warehousing & Distribution Services |
Continental Equipment Company (U.S.) | Sale of Komatsu construction machinery |
| CS Metal Co., Ltd.(Thailand) | Shearing, slitting, and sale of steel plates |
| CS Non-Ferrous Center Co., Ltd.(Thailand) | Shearing, slitting, and blanking of aluminum coils, sheets, and circles |
P.T. East Jakarta Industrial Park (Indonesia) | Sales, operation, and maintenance of industrial estate in Indonesia |
P.T. Oto Multiartha (Indonesia) | Financing of motor vehicles |
| P.T. Summit Oto Finance(Indonesia) | Financing of motor vehicles |
| P.T. Summitmas Property(Indonesia) | Management, operation and leasing of office buildings |
| P.T. Super Steel Indah(Indonesia) | Shearing, slitting, and sale of steel plates |
| P.T. Super Steel Karawang(Indonesia) | Shearing, slitting, and sale of steel plates |
P.T. Traktor Nusantara (Indonesia) | Forklift hire/rental, and sale/service for forklift, farm tractor and industrial equipment in Indonesia |
| Pacific Summit Energy LLC(U.S.) | Sale of natural gas |
Perennial Power Holdings, Inc. (U.S.) | Management of overseas investment in power generation |
| Petro Summit Pte. Ltd.(Singapore) | International trade of crude oil and petroleum products |
| Plaza Motors Corporation(Puerto Rico) | Import and sale of Mazda motor vehicles |
Presidio Ventures,Inc. (U.S.) | Strategic venture investment in USA |
Presperse Corporation (U.S.) | Formulation and distribution of specialty ingredients and formulated solutions for the cosmetic and personal care markets. |
| PT Sumisho E-commerce Indonesia(Indonesia) | Online retailer of food and household goods |
PT Sumisho Global Logistics Indonesia (Indonesia) | Warehousing & Distribution Services |
Qindao Xinghua Cereal Oil & Foodstuff Co., Ltd (China) | Manufacture and sell flour in China |
Red Australia Equipment Pty Limited (Australia) | Sale, hire and service for forklift and other material handling equipment |
Remarksa Polska (Poland) | Sale of second-hand construction machinery in Poland |
| Saigon Steel Service & Processing(Vietnam) | Shearing, slitting, and sale of steel plates |
| SC Construction Machinery (Shanghai) Ltd.(China) | Sale of Komatsu construction machinery |
| SC Metal Pty. Ltd.(Australia) | Investment in aluminum smelting operation in Australia |
| SC Mineral Resources Pty. Ltd.(Australia) | Investment in the Northparkes copper mine in Australia |
| SC Minerals America, Inc.(U.S.) | Investment in the Morenci copper mine, the Pogo gold mine in the U.S. and the Candelaria & Ojos del Salado copper mines in Chile |
| SC Motors Sweden AB(Sweden) | Management company of automotive distributorship and finance company, and wholesale of parts and accessories |
| SC Pipe Services Inc.(U.S.) | Investment in pipe manufacturing and sales company in the U.S.A. |
| SC Tubular and Steel Products (M.E.) FZCO(UAE) | Sale of Steel Tubular and Steel Products |
| Servilamina Summit Mexicana S.A. de C.V.(Mexico) | Steel Service Center (processing and sale of steel sheets) |
| SGL Philippines E-Zone Services Inc.(Philippines) | Global Logistics service for PEZA coy |
| Shanghai Dazhong Sagawa Logistics Co., Ltd.(China) | Door-to-Door (B2B & B2C) Delivery Services |
| Shanghai Hi-Tec Metal Products Co., Ltd.(China) | Manufacture and sale of metal-processing products |
| Shanghai Nikka Metal Products Co., Ltd.(China) | Stock, sale, and processing of tool steel |
| Shanghai Summit Metal Products Co., Ltd.(China) | Shearing, slitting, and sale of steel plates |
Sia BCM Baltigas Celtniecibas Masina (Latvia) | Sale of Komatsu construction machinery in Latvia |
| SMM Cerro Verde Netherlands B.V.(Netherlands) | Investment in the Cerro Verde copper mine in Peru |
| SMM Sierra Gorda Inversiones Limitada(Chile) | Investment in the Sierra Gorda copper and molibden mine in Chile |
| SMS Construction & Mining Systems Inc.(Canada) | Construction machinery and mining systems business in Canada |
| SMS International Corporation(U.S.) | Management and financial services for Komatsu construction machinery dealership |
| Steel Center (Malaysia) Sdn Bhd(Malaysia) | Shearing, slitting, and sale of steel plates |
Steel Center Europe, s.r.o. (Czech) | Shearing, slitting, and sale of steel plates |
Sumi Agro Europe Ltd. (U.K.) | Investment in agricultural chemicals business in Europe |
| Sumi-Thai Fertilizer Co., Ltd.(Thailand) | Import of fertilizer materials and sale of chemical fertilizers in Thailand |
| Sumifert Sdn. Bhd.(Malaysia) | Sale of fertilizers |
| Sumiputeh Steel Centre Sdn Bhd(Malaysia) | Shearing, slitting, and sale of steel plates |
| Sumisatt International FZCO(UAE) | Sale of construction machinery |
Sumisho Aircraft Asset Management B.V. (Netherlands) | Aircraft leasing |
| Sumisho Capital Management (Singapore) PTE. Ltd.(Singapore) | Investment advisory |
| Sumisho Coal Australia Pty. Ltd.(Australia) | Investment in coal mines in Australia |
| Sumisho E-commerce Shanghai Ltd(China) | Online retailer of food and household goods |
| Sumisho Global Logistics (China) Co., Ltd.(SGL China)(China) | Global Logistics Services |
| Sumisho Global Logistics (Thailand) Co., Ltd.(Thailand) | Warehousing & Distribution Services |
Sumisho Global Logistics (USA) Corporation (U.S.A.) | Global Logistics Service Provider |
Sumisho Global Logistics Europe GMBH (Germany) | Global Logistics Service Provider |
| Sumisho Laser Welding(Thailand) | Laser welding of steel sheets |
Sumitec International, Ltd. (Russia) | Sale and aftersales service of construction, mining machinery and material handling equipment |
Sumitex Hong Kong Limited (Hong Kong) | Sale of textile products and materials |
| Sumitomo Corporation Capital Europe Plc(U.K.) | Financial services to group companies |
Sumitomo Corporation Equity Asia Limited (Hong Kong) | Private equity investment in Asia |
| Sumitomo Corporation Global Commodities Limited(U.K.) | Tradingf of Market Commodities |
| Sumitronics Taiwan Co., Ltd.(Taiwan) | Sale of electronics materials and parts |
Summit Agro Mexico S.A. de C.V. (Mexico) | Sale of agricultural chemicals mainly in Mexico |
| Summit Agro USA, LLC(U.S.) | Sale of agricultural chemicals in the U.S. |
| Summit Auto Hungary Rt.(Hungary) | Management company of automotive finance and dealership |
Summit Auto Lease Australia Pty Limited (Australia) | Motor vehicle leasing to corporate customers |
| Summit Auto Management(Thailand) | Holding and management company of automotive dealership and finance companies |
| Summit Auto Poland SP. z.o.o.(Poland) | Automobile dealership of Honda |
| Summit Auto Trade Facilities(Jordan) | Financing of motor vehicles |
| Summit Discovery Resources LLC(U.S.) | Exploration, development, production, sale of and investment in natural gas in North America |
Summit Fertilizer (Qingdao) Co., Ltd. (China) | Manufacture and sale of chemical fertilizer in China |
| Summit Finance Slovakia s.r.o.(Slovakia) | Automobile finance |
| Summit Investment Australia Pty Limited(Australia) | olding and management company of automotive dealership and leasing companies |
| Summit Leasing Slovenija d.o.o.(Slovenia) | Automobile finance and dealership |
| Summit Minerals GmbH(Switzerland) | Sales of silver, zinc and lead concentrates produced at San Cristobal mine located in the Republic of Bolivia. |
| Summit Motors France S.A.(France) | Automobile dealership |
Summit motors Ljubljana d.o.o. (Slovenia) | Import and sale of Ford motor vehicles |
| Summit Motors Poland Sp. z.o.o.(Poland) | Automobile dealership of Ford |
| Summit Motors Slovakia s.r.o.(Slovakia) | Import and sale of Ford motor vehicles |
Summit Motors(Vladivostok) (Russia) | Import and sale of Toyota motor vehicles |
| Summit Petrochemical Trading Inc.(U.S.) | Sale and trade of aromatics products |
Summit Petroleum Limited (U.K.) | Exploration, development, production, sales of and investment in oil and natural gas in the UK North Sea |
Summit Rural (WA) Pty., Ltd. (Australia) | Company in fertilizer import in west Australia |
Summit Stainless Steel LLC (U.S.) | Sales of stainless steel products |
| Summit Steel (M.E.) FZCO(UAE) | Trade of various kind of steel products, Steel service center, sale of flat steel products |
Summit Wool Spinners Limited (New Zealand) | Manufacture and sale of wool yarn for carpets |
Summit-Agro Argentina (Argentina) | Sale of agricultural chemicals |
Suomen Rakennuskone Oy (Finland) | Sale of construction machinery in Finland |
TBC Corporation (U.S.A.) | Retail and wholesale of tires |
| Tecnosumit(Tecnologia para La Construccion y Mineria S.L.)(Spain) | Holding and management company of Komatsu distributor and other buisness |
Thai Special Wire Co., Ltd. (Thailand) | Manufacture and sale of PC wire and strand |
| Thai Steel Service Center Ltd.(Thailand) | Shearing, slitting, and sale of steel plates |
Thang Long Industrial Park Corporation (Vietnam) | Development, sales, and operation of industrial estate in Vietnam |
| Thang Long Industrial Park II Corporation(Vietnam) | Development, sales, and operation of industrial estate in Vietnam |
Hartz Mountain Corporation (U.S.) | Manufacturing, distribution and sales of pet care relatives |
| Tianjin Hua Zhu Metal Products Co., Ltd.(China) | Shearing, slitting, and sale of steel plates |
Toyota Canarias, S.A.(Canary Islands) (Spain) | Import and wholesale of Toyota motor vehicles and parts |
| Toyota Ly Thuong Kiet(Vietnam) | Toyota brand automotive dealer |
Toyota Summit (Thailand) | Toyota brand automotive dealer |
Toyota Ukraine (Ukraine) | Import, wholesale and retailsale of Toyota / Lexus automobiles and spare parts |