O-company
- O2 HOLDINGS LIMITED
- O3b Limited
- OASE GmbH
- OASIS Teehandel GmbH
- OBJECTIF PHARMA
- Octonull Korlátolt Felelősségű Társaság
- ODC DENTAL MEDICAL SYSTEM SRL
- ODENDALL FOUNDATION
- Office Kirkpatrick (société anonyme)
- OFX Group Limited
- Ogunde, Kenny
- Ogunde, Lincoln
- OKECHAMP S.A.
- Okolo SARL Luxembourg
- Olberts, Markus
- Olé Media Ltd
- OLIGO Lichttechnik GmbH
- OLIVETTA SA
- OLIVIERI & C. S.N.C. DIVISIONE PELLE.
- OLT
- OLX B.V.
- OLYMP Bezner KG
- OLYMPIA LE-TAN IP
- Olympique de Marseille SASP
- Omar Kassem Alesayi Marketing Co. Ltd.
- Ombretta AG
- OMEGA PHARMA INNOVATION & DEVELOPMENT NV
- Omega SA (Omega AG) (Omega Ltd.)
- Omidvar, Noushin
- OMNIA NISASTA SANAYI VE TICARET ANONIM SIRKETI
- Omnicloud AB
- Omnicom International Holdings Inc
- ONDOÑO ELVIRA, OSCAR
- ONE STEP, SOCIETE PAR ACTIONS SIMPLIFIÉE
- ONE WAY SPORT OY
- oneworld Alliance LLC
- OOKI SAS
- OpCapita Red Bidco S.à.r.l.
- OPTIMUS-COMUNICAÇÕES S.A.
- Orange Trading FZE
- ORBEA, S. COOP. LTDA.
- ORBI Diffusion
- ORENOK HOLDING SA
- ORIBAY MIRROR BUTTONS, S.L.
- ORIENT EXPRESS
- Orient Provision & Trading Co. Ltd.
- Origin Equity LLP
- ORIGINAL LIFE CO., LTD.
- ORIOLA OY
- Orion Corporation
- ORKLA FOODS ROMANIA S.A.
- ORMA SRL
- ORNUA Co-operative Limited
- Oro Agri International Ltd
- ORO-Produkte Marketing International GmbH
- ORTEGA VILLANUEVA, Jesús
- Orthofit Verkaufs GmbH
- ORTHOFIX S.R.L.
- OSAKA GROUP
- OSCARO.com (Société Anonyme)
- OSEM, d.o.o. Murska Sobota
- Oska, Justyna
- Ossaware Biotech Co., Ltd.
- OTHMAN KTIRI GROUP SLU
- Otto (GmbH & Co KG)
- OÜ Huppa
- Our Price Records Ltd
- Outerknown, LLC
- Outlife.com ApS
- OVAVIT, S.L
- OVERSEAS GROUP SA
- Oxon Italia S.p.A.
- OXXO Design AB
- OXY4 GmbH
- Oy Karl Fazer Ab
- OZAETA MUSITU, ALFREDO
