| OddBalls Apparel | GB | Opened | n/c | n/c | ||
| Oddbox | GB | Opened | n/c | n/c | ||
| Odd Sox | US | Opened | n/c | n/c | ||
| Odelyne Technology | Opened | n/c | n/c | |||
| Odelyne Technology - Amazon Seller | Opened | n/c | n/c | |||
| Odenson | Opened | n/c | n/c | |||
| Odinlake | US | Opened | n/c | n/c | ||
| oedro.com | US | Opened | n/c | n/c | ||
| ofcasafurniture.fr | FR | Opened | n/c | n/c | ||
| Offerpad | US | Opened | n/c | n/c | ||
| Officemasterchairs.com | US | Opened | n/c | n/c | ||
| Office Outlet | GB | Opened | n/c | n/c | ||
| Off The Grid Surplus | US | Opened | n/c | n/c | ||
| Off The Record | US | Opened | n/c | n/c | ||
| Of Mercer | US | Opened | n/c | n/c | ||
| OFX | Opened | n/c | n/c | |||
| OG | US | Opened | n/c | n/c | ||
| OGLmove | Opened | n/c | n/c | |||
| OG Markets Limited Creator | US | Opened | n/c | n/c | ||
| oHHo Botanicals | US | Opened | n/c | n/c | ||
| Ohio Power Tool | US | Opened | n/c | n/c | ||
| Ohla Hotels(GLOBAL) | Opened | n/c | n/c | |||
| OHME! Foods | CA | Opened | n/c | n/c | ||
| Ohm Health | US | Opened | n/c | n/c | ||
| ohmyprettywig.com | Opened | n/c | n/c | |||
| ohora US | US | Opened | n/c | n/c | ||
| Ohuhu | US | Opened | n/c | n/c | ||
| Ojai Wild | US | Opened | n/c | n/c | ||
| OJALÁ | US | Opened | n/c | n/c | ||
| Oka-B | US | Opened | n/c | n/c | ||
| Okada Manila(GLOBAL) | Opened | n/c | n/c | |||
| OKAI Affiliate Program | US | Opened | n/c | n/c | ||
| Okcoin | Opened | n/c | n/c | |||
| OKELI Lights | US | Opened | n/c | n/c | ||
| OkiOki | Opened | n/c | n/c | |||
| okko | US | Opened | n/c | n/c | ||
| OKO Food | US | Opened | n/c | n/c | ||
| OKX | Opened | n/c | n/c | |||
| OKX | US | Opened | n/c | n/c | ||
| OLAMIC | US | Opened | n/c | n/c | ||
| Old Navy | US | Opened | n/c | n/c | ||
| Old Navy Advocacy | US | Opened | n/c | n/c | ||
| Old Navy Canada | CA | Opened | n/c | n/c | ||
| Old Timer | US | Opened | n/c | n/c | ||
| Olet Optical | Opened | n/c | n/c | |||
| OLEU | US | Opened | n/c | n/c | ||
| Olightstore USA Inc. | NC | Opened | n/c | n/c | ||
| Olio Piro | US | Opened | n/c | n/c | ||
| OLIPOP | US | Opened | n/c | n/c |