These companies are: Bayer CropScience AG; Bayer HealthCare AG; Bayer MaterialScience AG and Bayer Chemicals AG, and the three service limited companies Bayer Technology Services GmbH, Bayer Business Services GmbH and Bayer Industry Services GmbH & Co. OHG.
Существует также три сервисных компании: Bayer Technology Services GmbH, Bayer Business Services GmbH и Bayer Industry Services GmbH & Co. OHG.