| NOVOBANCO | BR | Closed | n/c | n/c | ||
| NUNUTRI HEALTH CARE INCORPORATED | US | Closed | n/c | n/c | ||
| Nygard | US | Closed | n/c | n/c | ||
| Nylon | US | Closed | n/c | n/c | ||
| NYTSTND | US | Closed | n/c | n/c | ||
| Oak&Hyde | GB | Closed | n/c | n/c | ||
| OBDeleven - Amazon DE | DE | Closed | n/c | n/c | ||
| OBDeleven - Amazon US | US | Closed | n/c | n/c | ||
| Obey Clothing | US | Closed | n/c | n/c | ||
| OCEANSAPART | DE | Closed | n/c | n/c | ||
| Ochre Touch | AU | Closed | n/c | n/c | ||
| O'clock | FR | Closed | n/c | n/c | ||
| Odacité | Closed | n/c | n/c | |||
| OfferZen | Closed | n/c | n/c | |||
| Office 365 for Business | Closed | n/c | n/c | |||
| Office Designs | US | Closed | n/c | n/c | ||
| Office Pool Manager | Closed | n/c | n/c | |||
| OfficeSuperSavers | US | Closed | n/c | n/c | ||
| OfficeSupply.com | US | Closed | n/c | n/c | ||
| Of Them All - Creator | US | Closed | n/c | n/c | ||
| Of Them All™ | US | Closed | n/c | n/c | ||
| OHM Electric Bikes | Closed | n/c | n/c | |||
| OkCupid DE | DE | Closed | n/c | n/c | ||
| Olightstore USA Inc. - Creator | US | Closed | n/c | n/c | ||
| OLIPOP - Amazon Vendor - US | US | Closed | n/c | n/c | ||
| Olistic Science | Closed | n/c | n/c | |||
| Olympus | US | Closed | n/c | n/c | ||
| Ombre | Closed | n/c | n/c | |||
| Omnilux | US | Closed | n/c | n/c | ||
| OnDeck Capital Business Loans | Closed | n/c | n/c | |||
| One World Solutions | US | Closed | n/c | n/c | ||
| Online Privacy Solutions | US | Closed | n/c | n/c | ||
| OnSIP | US | Closed | n/c | n/c | ||
| Onward App | Closed | n/c | n/c | |||
| OpenArt AI - Creator | US | Closed | n/c | n/c | ||
| Opta Naturals | US | Closed | n/c | n/c | ||
| Optical Express (Completed Surgery Campaign) | GB | Closed | n/c | n/c | ||
| Optima | PL | Closed | n/c | n/c | ||
| Optimole | Closed | n/c | n/c | |||
| Orbitly.io | Closed | n/c | n/c | |||
| Orchard Supply Hardware | Closed | n/c | n/c | |||
| Oriental Trading Company | Closed | n/c | n/c | |||
| Original Grain Watch US | US | Closed | n/c | n/c | ||
| Origin Investments | Closed | n/c | n/c | |||
| OrionMarts International | US | Closed | n/c | n/c | ||
| Orro Partner Program | Closed | n/c | n/c | |||
| Orwell + Austen Limited | GB | Closed | n/c | n/c | ||
| OSEA Malibu | Closed | n/c | n/c | |||
| OtterBox Asia | JP | Closed | n/c | n/c |