- Acer Eastern Europe
 - Ahrensburg - Wholly owned subsidiary, responsible for Germany, Switzerland, Austria and Eastern Europe. - Basler Vision Technologies
- Ahrensburg - Suppliers of machine vision components and systems.
- Hagenuk Telecom
- Kiel - Developing, manufacturing and marketing of telecommunication products.
- Institute of World Economics
- Kiel - International centre for economic research and documentation.
- Zipperling Kessler & Co.
- Ahrensburg - Modification of thermoplastic polymers with pigments and additives. Masterbatch development and production. Corrosion protection with the new organic metal ORMECON, a polyaniline.
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