Vi har så langt registrert 19 743 rederier
| Navn | Grunnlagt | | T. Hansen,, Tvedestrand | |
| Th. Apenes & Jens Amundsen, Sarpsborg | |
| Th. Bentzen, Arendal | |
| Th. Bjørnstad, Kristiania | |
| Th. Blehr, Brevik | |
| Th. Brøvig, Farsund | 1890 |
| Th. Børnick, Bergen | |
| Th. Capjon, Drammen | |
| Th. Clausen, Arendal | |
| Th. Davidsen & Co. Kristiania | |
| The Adelade Steam Ship Co. Ltd. Melbourne | |
| The Admirality, UK | |
| Th. Ebbesen, Tønsberg | |
| The Clan Line Steamer Ltd., Glasgow | |
| The Eastern Shipping, Oslo, Norge | |
| The Eastern Shipping v/ Roy Engelstad, Oslo | 1939 |
| The Freemantle Whaling Co.Ltd.(Chr.Nilsen & Co) | |
| The Green Tankers A/S, Oslo | |
| The Heirs of the late Michael J. Goulandris Bros. | |
| Theisen,Karl & Oskar Knudsen, Korshavn | |
| Theisen,Karl, Sælør | |
| Theisens Enke, T.C.,Spind | |
| Theisen,Theis Abraham, Spind | |
| Theisen,Theis, Spind | |
| Theisen, Østen, Austad | |
