SIAG Tube & Tower GmbH is a steel construction company headquartered and operating at a single production site in Leipzig, offering planning and project engineering as well as construction of houses and halls and turnkey buildings via subcontractors. The production focus is on manufacturing components for wind energy technology, in particular steel towers for wind turbines including complete installation of all internals according to customer specifications in the onshore segment. The company produces almost exclusively for the European region and has SIAG Industrie GmbH as its sole shareholder. In fiscal 2023 STT employed on average 85 people (68 in skilled/operational roles, 17 in technical/administrative roles) and additionally engages in procurement and sales of steel construction parts, silos, pipelines and tanks.
- Errichtung von Häusern und Hallen sowie schlüsselfertiger Bauten durch Subunternehmer, Planung und Projektierung von Anlagen, sowie sämtliche damit zusammenhängende Tätigkeiten. - Fertigung von Bauteilen für die Windenergietechnik, insbesondere Stahlrohrtürme und Fundamentringe, sowie deren Planung und Konstruktion, Einkauf, Fertigung, Vertrieb, Verfrachtung und Montage. - Einkauf und Vertrieb von Stahlbau und Stahlbauteilen jeglicher Art, Silos, Rohrleitungen und Behältern, sowie Planung und Vergabe von Konstruktionszeichnungen.
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Source: German Commercial Register (Handelsregister) Leipzig Local Court, HRB 21121 (as of 22 September 2026)
Source: German Commercial Register (Handelsregister) Leipzig Local Court, HRB 21121 (as of 22 September 2026)
Source: German Commercial Register (Handelsregister) Leipzig Local Court, HRB 21121 (as of 22 September 2026)
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Source: German Commercial Register (Handelsregister) Leipzig Local Court, HRB 21121 (as of 22 September 2026)
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