We have so far registered 19,743 shipping companies
| Name | Founded | | A/S Hånes & Co., Rovde, Ålesund | |
| A/S Høgsfjord Rutelag, Stavanger | |
| A/S Høgsfjord Ruteselskab,Stavanger | |
| A/S Høle & Forsand D/S, Stavanger | |
| A/S Høllalaks, Skrova | |
| A/S Høyangerfaldene, Stavanger | |
| Asiatic Petroleum Co Ltd, London, UK | |
| A/S Iddi, Oslo | |
| A/S I. M. A. Oslo | |
| A.Simonsen, Haugesund | |
| A/S International Gas Carriers , Oslo | |
| A/S Investa, Bergen | |
| A/S Ishavet, Kristiania | |
| A/S Ivarans Rederi (S. Holter Sørensen) Oslo | |
| A/S Iversen & Bolle, Narvik | |
| A. Sivertsen, Stavanger | |
| A/S Jacob W. Kvalvik, Bergen | |
| A/S Jakobsen & Sønner, Tromsdalen, Tromsø | |
| A/S Jebsen Industrial Shipping Services, Bergen | |
| A/S Jebsen Ship Management, Bergen | |
| A/S J. Marine Services, Bergen | |
| A/S Joachim Grieg & Co. Holding, Krisansand S | |
| A/S Jotungruppen, Sandefjord | |
| A/S Jubileumskipet, Tønsberg | |
| A/S Jøsenfjord, Hjelmeland, Stavanger | |
