| Ocugenix | |
| Ocular AI, Inc. | |
| Ocular Box Studios | North Carolina |
| Ocular Instruments | |
| Ocular Therapeutix, Inc. | |
| Oculii | Ohio |
| Oculogenex | California |
| Oculogica | |
| Oculus by Facebook | California |
| Oculus Research | North Carolina |
| Oculus Technologies Corporation | Massachusetts |
| OcuSciences, Inc. | Michigan |
| OcuTerra | Massachusetts |
| Ocutri, LLC | |
| Ocuvex Therapeutics, Inc. | |
| OCwebs, LLC | California |
| OcyonBio | Puerto Rico |
| OD-OS, Inc. | California |
| ODA Creative Partners | Illinois |
| Odaclick, LLC | |
| Odaseva | California |
| Odato Marketing | |
| Odd Dog Media | |
| Odd Duck Media, LLC | |
| OddBot, Inc. | California |
| Oddcast, Inc. | New York |
| Odea Integration | |
| Odeko | New York |
| Oden Industries, Inc. | California |
| Oden Technologies Ltd | New York |
| Odessa | Pennsylvania |
| Odessa College | Texas |
| Odeum, LLC | |
| ODI Consulting, Inc. | Florida |
| ODI Technologies, Inc. | Washington |
| Odic, Inc. | Massachusetts |
| Odin Labs, Inc. | New York |
| Odin Pharmaceuticals, LLC | |
| Odin Technologies, LLC | |
| ODMsoft | |
| Odney | |
| OdontoSoft Millennium | Florida |
| ODP Business Solutions, LLC | |
| ODTap | |
| ODTUG | North Carolina |
| ODU-USA | California |
| Odulo Enterprises | California |
| Odum Capital, LLC | District of Columbia |
| Odys Aviation | |
| Odyssey | |