| Company | Booth | |
| OCEANPACT | 319 | |
| Ohmsett | 451 | |
| OilKontrol USA | 249 | |
| OiLock | 213 | |
| OMNI Solutions | 100 | |
| OVERSEA RESPONSE | 406 | |
Alabama Department of Environmental Management
Florida Department of Environmental Protection
Mississippi Department of Environmental Quality