JTJ Sonneborn Industrie GmbH, based in Sonneborn, is a specialized production subsidiary of the Danish VELUX A/S. The company primarily manufactures roof windows and also acts as a logistics service provider as well as the sole manufacturer of make-to-order products within the VELUX Group. The company employs an average of 547 people and is classified as a large corporation. The main customer for the produced goods is the parent company VELUX A/S in Hørsholm.
die Herstellung von Velux-Dachflächenfenstern. Die Gesellschaft kann sich an anderen Unternehmen beteiligen.
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Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 505949 (as of 22 August 2026)
Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 505949 (as of 22 August 2026)
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Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 505949 (as of 22 August 2026)
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