We have so far registered 19,743 shipping companies
| Name | Founded | | A/S Oddstein, Haugesund | |
| A/S Ofottank, Narvik | |
| A. Solberg, Drammen | |
| A. Solbergs enke, Drammen | |
| A/S Orkla - Løkkens Verk, Trondheim | |
| A/S Ostra, Orkanger | |
| A/S Party, Stavanger | |
| A/S Pegasus, Bergen | |
| A. Speilberg, Tvedestrand | |
| Aspen,Nils Birger,Skjettenhaugen | |
| Asper Norway A/S, Fosnavåg | |
| A/S Petrolea,Oslo | |
| A/S Phønix Trading, Mandal | |
| A/S Pioner,Oslo | |
| A/S Plus, Arendal | |
| A/S Polarbjørn, Brandal, Ålesund | |
| A/S Polarbulk, Hammerfest | |
| A/S Polarline, Homannsbyen, Oslo | |
| A/S Porsgrunns Hnadelsbanks konkursbo, Porsgrunn | |
| A/S Preco,Oslo | |
| A/S Progress Konkusbo, Stavanger | |
| ASP Shipmanagment AB. Oslo | |
| Aspøy A/S, Ålesund | |
| A/S Ramoen , Ålesund | |
| A/S Ramses, Oslo | |
