Vi har så langt registrert 19 632 rederier
| Navn | Grunnlagt | | Ocean Oil Operation v/ Gotaas Larsen, Panama | |
| Ocean Oil Tankship Corp. v/ Gotaas Larsen Ltd. London, Uk | |
| Oceanos Maritime Steam Ship Co. v/ I. A. & G. Margaronis | |
| Ocean Prince A/S, Steinsland, Bergen | |
| Ocean Queen A/S, Rovde, Ålesund | |
| Ocean Rescue K/S, Bergen | |
| Ocean Sartor Shipping A/S, Steinslan | |
| Ocean Steam Ship Co. Ltd. v/ A. Holt & Co. | |
| Oceanteam Shipping A/S, Bergen | |
| Ocean Transport A/S, Florø | |
| Ocean Venture A/S, Blomsterdalen, Bergen | |
| Ocean West A/S, Rovde, Ålesund | |
| O. C. Emanuelsen, Oddekleiv, Lillesand | |
| O. C. Gundersen, Kjellingland, Lillesand | |
| O. C. Gundersen, Lillesand | |
| O. C. Hansen, Gogstad, Sandefjord | |
| O.C. Hansen, Skudeneshavn | |
| O. C. Heldahl, Lillesand | |
| O. Christensen, Kristiansand S | |
| O. Christensen, Tønsberg | |
| O. Christiansen, Fredrikshald / Halden | |
| O. Christiansen, Larvik | |
| O. Christoffersen, Tønsberg | |
| O. C. Hytten, Tønstberg | |
| O. C. Johansen, Kristiansand | |
