| Name | Yachten | ||
|---|---|---|---|
| Ocean Sailing House | 9 | - | Details |
| Oceanis Yachting | 4 | - | Details |
| Octopus Yachting | 15 | - | Details |
| Odisej Yachting d.o.o. | 12 | - | Details |
| Offshore Boote | 3 | - | Details |
| Olympic Yachting Shipping Co. Ltd. | 19 | - | Details |
| Omegasail UK Ltd. | 11 | - | Details |
| One Day Charter | 2 | - | Details |
| Open Sail | 1 | - | Details |
| Orvas Yachting | 23 | - | Details |
| Oryx Yachting, Kroatien | 6 | - | Details |
| Oryx Yachting, Türkei | 11 | - | Details |