Lobbyists having Bayer AG as a client
- Burson Cohn & Wolfe Sprl
- Dario Ruivo Lda.
- Edelman Public Relations Worldwide
- EPPA SA
- EUTOP Europe GmbH
- FGS Global (Europe) GmbH
- Fleishman-Hillard
- Hume Brophy
- Rud Pedersen Public Affairs Brussels
- The Huggard Consulting Group