| OCI NV |
| Octet Express Ödeme Kurulusu A.S. |
| Octet Group |
| Octopus Energy Holdings Ltd |
| Octopus Energy Ltd |
| Octopus Group |
| Octopus Investments Ltd |
| Odgers Group Ltd. |
| Oetker Collection |
| Oikocredit Ecumenical Development Co-operative Society |
| Oji Holdings Corporation |
| OK PRODZHEKTS HO [OK Projects] |
| Okiocredit |
| Okta Inc. |
| Olaf & McAteer |
| Olam International Limited |
| Old Mutual Wealth |
| Olga |
| Olympique Mnihla |
| Omar Asghar Khan Development Foundation |
| Omidyar Network |
| Omnicom Group Inc |
| On AG |
| One Hotels & Resorts GmbH |
| One Village Limited |