| OCEANFEED PET | |
| OCEANFEED POULTRY | |
| OCEANFEED SWINE | |
| OCSA - ON CLOUD SEMEN ANALYSIS | |
| OFFICINE FACCO & C. S.P.A. | |
| Officine Facco & C. S.p.A. | |
| OIHUNA ARTEKARITZA S.L. | |
| OJEFER | |
| OLIMPE-AGRI | |
| OLMIX | |
| OMNIPAC GROUP | |
| ONCE BY SIGNIFY | |
| ONCE by Signify | |
| OPP GROUP | |
| OPTIBABY | |
| OPTICAR | |
| OPTICON | |
| OPTIFEED | |
| OPTIFLEX | |
| OPTIGROW | |