| Own Identity, Inc. | Delaware |
| Own Our Own | Pennsylvania |
| Owner | |
| Owner Insite, LLC | Texas |
| ownerIQ | |
| OwnerRez, Inc. | Washington |
| OwnersEdge, Inc. | Wisconsin |
| Ownersite Technologies | Georgia |
| OwnLocal, Inc. | Texas |
| OWOX | California |
| OWP Pharmaceuticals, Inc. | |
| Oxagile | New York |
| Oxalo Therapeutics, Inc. | |
| OxeFit, Inc. | Texas |
| Oxeia Biopharmaceuticals | |
| OXEN Technology | Iowa |
| Oxenham Consultants, Inc. | |
| OxEon Energy, LLC | |
| Oxer Technologies, Inc. | New York |
| Oxford Biomedical Research | |
| Oxford BioTherapeutics, Inc. | California |
| Oxford Group Design | North Carolina |
| Oxford Lane Capital Corporation | Connecticut |
| Oxford Pharmaceuticals, LLC | |
| Oxford Square Capital Corporation | Connecticut |
| Oxford Win, LLC | |
| OxiCool, Inc. | |
| Oxide Computer Company | California |
| OXIO, Inc. | |
| Oxit, LLC | |
| Oxlo Systems, Inc. | Colorado |
| OXLO, Inc. | |
| Oxnard College | California |
| OXOS Medical | Georgia |
| Oxus America | Michigan |
| OXY Creative | |
| oXya | New Jersey |
| Oxygen Cloud, Inc. | California |
| Oxygen Electronics, LLC | New York |
| Oxyrase | |
| OyaGen, Inc. | New York |
| OYC Americas, Inc. | |
| OYE Therapeutics, Inc. | |
| Oyen Digital, LLC | Minnesota |
| OYO AI, Inc. | |
| Oyova Software | |
| Oyster HR, Inc. | California |
| OysterLabs | |
| OysterLink | |
| OYZTA | |