We have so far registered 19,566 shipping companies
| Name | Founded | | Simon J. Øvretveit, Tælavåg, Bergen | |
| Simon Langetangen, Kragerø | |
| Simon Møkster Rederi A/S, Stavanger | |
| Simon Møkster Shipping A/S, Stavanger | |
| Simon Møkster, Stavanger | |
| Simon O. Røksund, Mosterhavn, Haugesund | |
| Simonsen & Astrup, Oslo | |
| Simonsen & Bjærtness, Holmestrand | |
| Simonsen,Johannes, Nesheim | |
| Simonsen & Mustad, Horten | |
| Simonsen & Musæus Holst, Bergen | |
| Simonsen, Severin, Greåker, Sarpsborg | |
| Simonsen, Skien | |
| Simonsen & Slang A/S,Oslo | |
| Simonsen,Søren & Salve,Snig,Mandal | |
| Simonsen,Th.,Odda | |
| Simon & Theodor Briseid, Feda | |
| Simon W. Marcussen, Lyngør | |
| Simrad A/S, Horten | |
| Simrad Norge A/S, Horten | |
| Simrad Sub Sea A/S, Horten | |
| Sinclair Refining Co, Inc. New York/Wilmington | |
| Singapore Straits Steam Ship, Co. Ltd, Singapore | |
| Singa Ship Management, Grimstad | Ukjent |
| Singa Ship Managment A/S, Bergen / Oslo | |
