We have so far registered 19,566 shipping companies
| Name | Founded | | W. Thomson & Co. Leith. | |
| W. Thoresen, Lillesand | |
| W. Tynæs, Oslo | |
| Wulf Pedersen,G.,Sarpsborg | |
| W. W. E. A/S, Oslo | |
| Wågsholm, Jarle, Fosnarvåg | |
| Xilas Bros & Constantinidis | |
| Xilas Bros., Syra, Hellas | |
| Yannoulatos Brothers, Pireus, Hellas | |
| Yara Gas Ship A/S, Oslo | |
| Yara Ship A/S, Oslo | |
| Y. Collett & Mølbach, Kristiania | |
| Y. Fjeldvik & Finn Kristensen, Porsgrunn | |
| Yggdrasil A/S,Ornes | |
| Yggdrasil A/S, Solvorn, Florø | |
| Yin & Yang Invest A/S, Oslo | |
| Yngvar Hvistendahl, Tønsberg | |
| Yngve Eide, Kvæfjord, Harstad | |
| Yngve Fahlander ,Stockholm, Sverige | |
| Yngve Johnsen, Tromsø. | |
| Yran Sunde, Ålesund | |
| Ytreland, Andreas, Kopervik | |
| Ytreland,John T.,Kopervik | |
| Ytre Nordhordlandske Dampskibsselskab, Bergen | |
| Ytre Rolløya A/S, Harstad | |
