| ANS Steel Tubes Limited | Manufacturing and sales of electric resistance welded (ERW) pipes for automobiles and motorcycles | India |
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| AO & G Holding B.V. | Manufacture and sale of Thermoplastic Composite Pipes (TCP) | Netherlands |
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| Arkansas Steel Associates, LLC | Steel mini mill (Manufacturing of railroad tie plates) | U.S.A. |
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| Calamba Steel Center Inc. | Steel service center (processing and sales) | Philippines |
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| CS Metal Co., Ltd. | Steel service center (processing and sales) | Thailand |
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| Hanoi Steel Center Co., Ltd. | Steel service center (processing and sales) | Vietnam |
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| Mactan Steel Center Inc. | Steel service center (processing and sales) | Philippines |
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| Mason Metal Industry Co., Ltd. | Steel service center (processing and sales) | Taiwan |
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| Nippon Steel Pipe America, Inc. | Manufacturing and sale of welded steel pipes for automobiles | U.S.A. |
|---|
| PT. Super Steel Karawang | Steel service center (processing and sales) | Indonesia |
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| S & L Consulting SA | Consulting and Engineering for OCTG | Switzerland |
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| Saigon Steel Service & Processing Co., Ltd. | Steel service center (processing and sales) | Vietnam |
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| S and L Consulting USA, Inc. | Consulting and Engineering for OCTG
| U.S.A. |
|---|
| SC Metal Pty Ltd | Investment in aluminum smelting operation in Australia | Australia |
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| Sekal AS | For the safety and cost-effective oil and gas development, Sekal software based on a state-of-art physics model enables to figure out
precisely a real-time drilling condition as well as to look ahead a future potential risk.
These unique characteristics also enable software to manipulate safely drilling equipment in an automatic fashion.
| Norway |
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| Servilamina Summit Mexicana S.A. de C.V. | Steel service center (Steel process and sales) | Mexico |
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| Steel Center Europe, S.R.O. | Shearing, slitting, and sale of steel sheets | Czech |
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| Steel Centre (M) Sdn. Bhd. | Steel service centre (processing and sales), production and sales of steel products of construction | Malaysia |
|---|
| Steelsummit Holdings, Inc. | Steel Service Center & Import of Flat Rolled Steel | U.S.A. |
|---|
| Steelsummit International Trading (Canada) Inc. | Steel Trading | Canada |
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| Sumiputeh Steel Centre Sdn. Bhd. | Steel service center (processing and sales) | Malaysia |
|---|
| Sumisho Metal (Thailand) Co., Ltd. | Steel service center (processing and sales) | Thailand |
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| Summit Steel M E FZE | Trade of various kind of steel products, Steel service center, sale of flat steel products | U.A.E. |
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| Thai Special Wire | Manufacture and sales of PC steel wires and spring wires | Thailand |
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| Thai Steel Pipe Industry Co., Ltd. | Manufacture and sales of welded steel tubes | Thailand |
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| Vietnam Nippon Steel Pipe Company Limited | Manufacture and sales of mechanical steel tubes mainly for motorcycles | Vietnam |
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| 住商鋼鐵製品（香港）有限公司 | Shearing, slitting, and sale of steel sheets | China |
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| 上海頂鋒金属製品有限公司 | Shearing, slitting, and sale of steel sheets | China |
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| 上海日嘉金属制品有限公司 | Stock, sale, and processing of tool steel | China |
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| 中山高木汽車配件有限公司 | Manufacture and sales of pressed parts and molds for automobiles | China |
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| 中山市野村鋼材製品有限公司 | Steel service center (processing and sales) | China |
|---|
| 天津華住金属制品有限公司 | Shearing, slitting, and sale of steel sheets | China |
|---|
| 東莞頂鋒金属制品有限公司 | Steel service center (processing and sales) | China |
|---|
| 無錫頂鋒日嘉金属制品有限公司 | Manufacture, processing and sales of tool steel and semi-finished molds | China |
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| 無錫宝美鋒金属加工配送有限公司 | Steel service center (processing and sales) | China |
|---|
| 鈴木住電鋼綫制品（廣州）有限公司 | Manufacture and sales of stainless steel wires | China |
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| 佛山頂鋒日嘉模具有限公司 | Stock, sale, and processing of tool steel | China |
|---|
| 广州日鉄鋼管有限公司 | Manufacture and sales of tubular products for automobiles, construction equipment and motorcycles | China |
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