Companies owned by the Techint group through Tenaris include: Siderca and Siat (Argentina), Confab (Brazil), Tamsa (Mexico), Algoma (Canada), Dalmine (Italy), Silcotub (Romania) and has production facilities in the US and a joint venture with NKK (Japan), holding 51% of NKK shares since 1999, making it the first Japanese steel company in foreign majority ownership.