Theodor Stephan KG was established by Theodor Stephan Sr. in 1902 in Essen. It was involved in the operation of sand quarries for foundry applications, the processing of blast furnace slag for road construction, and the trading of mineral products for the construction industry. In 1979, we acquired the "Augusta" deposit in Oberbrechen/Taunus, where raw china clay is extracted for use in non-ceramic products. Today, the company is run by the third and fourth generation by Iris Loh-Stephan and Arndt Nikolaus Loh. Our aim is to expand the mines and to alter our portfolio of raw materials and processing options to meet our customers' needs. In this process, we only and exclusively work in accordance with legal requirements and safety regulations, serving both the environment and our employees. We are certified to ISO EN 9001: 2015 and are participants in the ÖKOPROFIT project of the state of North Rhine-Westphalia.

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  • 14 Vorratssilos

  • Gemahlene Produkte

  • Lohnverpackung

Keywords associated with this company

  • Minerals
  • Raw materials for construction and public works
  • Marble and natural stones
  • Chemistry, inorganic - raw materials and derivatives
  • Ceramics, porcelain and earthenware - industrial products
  • Raw materials for ceramics industry
  • Clay and kaolin
  • bentonite
  • Special mineral loads
  • Fire retardant loads
  • raw materials for the ceramics industry
  • raw materials for refractory ceramics
  • kaolin
  • clay-based treatment

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Key figures

  • 11 – 50
    company headcount
  • 1 – 10
    Sales staff
  • 25%
    % of export sales
  • 1.000 K€ - 2.499 K€
    Sales turnover


  • Year established
  • Site status
    Site status
    Registered office
  • Main activity
    Site status
    Manufacturer/ Producer

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