Vi har så langt registrert 19 632 rederier
| Navn | Grunnlagt | | Ulvan - Berge Rederi A/S, Trondheim | |
| Ulvan Bulk A/S, Trondheim | |
| Ulvan Personal A/S, Trondheim | |
| Ulvesunds Kreditbank, Måløy | |
| Uløyfisk A/S, Skjervøy/Rotsund | |
| Unge Sjømenns Kristlige Forening, Stavanger | |
| Union A/S | |
| Union Castle Mail S.S.Co.Ltd., London, England | |
| Union Co., Skien | |
| Union Oil Co. of California, Los Angeles, California, USA | |
| Union S.S. Co. of New Zealand Ltd., Sydney, NSW, Australia | |
| Union Steamship Company of New Zealand Ltd, Wellington | |
| Union Steam Ship Co.of New Zealand Ltd. Melbourne | |
| Union Steam Ship, Vancouver, BC, Canada | |
| Union Sulphure Co. Inc. | |
| United Africa Co. Ltd. | |
| United European Car Carriers A/S,Grimstad | |
| United European Car Carriers Norway A/S, Grimstad | |
| United Fisheries Co. W.L.L., Kuwait | |
| United Fisheries of Kuwait K.S.C., Kuwait | |
| United Fruit Co, New York, NY, USA | |
| United Mail S.S. Co., New York, USA | |
| United States Army, USA | |
| United States Coast Guard | |
| United States Lines,USA | |
