| Smell Fresh AS | Siggerud | 2024 |
| Smeller Bussutleie AS | Oslo | 2021 |
| Smertefri Fødsel Aps | 1401 København K | 2018 |
| Smet-Jet | Be-2260 Westerlo | 2023 |
| Smi Group Limited | Se1 0Bs London | 2013 |
| Smia Bar & Spiseri Da | Sævelandsvik | 2005 |
| Smiberget AS | Nordkjosbotn | 2023 |
| Smidsrødveien 43 AS | Nøtterøy | 1995 |
| Smil Holding AS | Moss | 2024 |
| Smil Renhold AS | Moss | 2021 |
| Smile Explorers AS | Oslo | 2026 |
| Smilebox AS | Drammen | 2023 |
| Smilie AS | Oslo | 2019 |
| Smimea Record 51 Ltd Nuf | N146Qh, London, Southgate | 2010 |
| Smith & Smule Marked Og Media Ans | Lillestrøm | 1999 |
| Smith AS | Holmestrand | 2018 |
| Smith Oil and Gas Engineering Ltd | Ls27 9Lq Leeds | 2019 |
| Smith Prosjekt & Drift AS | Langhus | 2021 |
| Smith Schneider Guideservice AS | Rong | 2021 |
| Smith-Gahrsen Invest AS | Hvam | 2025 |
| Smiths Detection Germany GmbH | De-Wiesbaden 65205 | 2019 |
| SMK Invest AS | Stavanger | 2005 |
| Smo AS | Kristiansand S | 2017 |
| SMP Service AS | Sande I Vestfold | 2015 |
| Sms-Holding AS | Skien | 2015 |
| SMT Renting AB | Se-2522 Helsingborg | 2021 |
| Smud Utleie AS | Sellebakk | 2020 |
| Smurfit Kappa Danmark | 6000 Kolding | 2009 |
| Smyl Brenneri AS | Kristiansund N | 2016 |
| Små Landskap AS | Vettre | 2012 |
| Smågarda Maskinlag AS | Bøverbru | 2025 |
| Småjobb Øst AS | Granli | 2023 |
| Småtroll AS | Stavanger | 1997 |
| Smøla Bygdeservice SA | Smøla | 2006 |
| Smøla Havstuer AS | Smøla | 2010 |
| Smøla Kajakk AS | Smøla | 2013 |
| Smøla Maskinutleie AS | Smøla | 2019 |
| SN Hytteservice AS | Vågå | 2019 |
| SN Multiservice AS | Hell | 2021 |
| SN Ventures AS | Oslo | 2025 |
| Snake Oil Shipholding AS | Bodø | 2025 |
| Snap Transport Og Bildeler AS | Finstadjordet | 2021 |
| Snapp Service Utleie AS | Haugesund | 2015 |
| Snarby Gård AS | Lysaker | 2024 |
| Snare Eiendomsservice AS | Sørumsand | 2021 |
| Snart Konkurs AS | Oslo | 2018 |
| SND Subsea Ltd | Aberdeen Scotland Ab130Aw | 2020 |
| Snedigt Da | Kleppe | 2005 |
| Snehvit Holding AS | Oslo | 1990 |
| Snekkar AS | Sørreisa | 2022 |
| Snekker Andersen & Co AS | Egersund | 2025 |
| Snillfjord Bygdeservice SA | Snillfjord | 2011 |
| Snoveien Servicetjenester AS | Oslo | 2017 |
| Snow Travels AS | Tromsø | 2023 |
| Snowfox Boat Charter AS | Longyearbyen | 2026 |
| Snowfox Travel AS | Longyearbyen | 2025 |
| Snuken Invest AS | Os | 2025 |
| Snåsa Events AS | Snåsa | 2021 |
| Snåsa Game Fair AS | Snåsa | 2023 |
| Snåsadagan SA | Snåsa | 2006 |
| Snåsalarm Ans | Snåsa | 2012 |
| Snø & Strø AS | Gjettum | 2025 |
| Snø & Vedlikehold AS | Askim | 2017 |
| Snø Og Utemiljø AS | Kongsvinger | 2020 |
| Snøgg AS | Ål | 2022 |
| Snøgrønt AS | Jessheim | 2024 |
| Snøhetta Sikkerhet AS | Oppdal | 2017 |
| Snømakeren AB | Hjelledalen | 1996 |
| Snøpatruljen AS | Vollen | 2025 |
| Snørken Maskinlag AS | Bardu | 2017 |
| Snørydding Kjell Tore Hagen AS | Vennesla | 2014 |
| Snørydding Og Service AS | Vadsø | 2022 |
| Snøryddingsfirmaet Wassum AS | Oslo | 2023 |
| Snøservice AS | Larvik | 1998 |
| So Maskin AS | Arendal | 2004 |
| So Vatnøy AS | Seim | 2020 |
| Soa Record 40 Ltd Nuf | N146Qh, London, Southgate | 2010 |
| Soba Bemanning | Borgenhaugen | 2008 |
| Soba Recruitment Da | Oslo | 2023 |
| Social Media Days AS | Fornebu | 2020 |
| Societa Autotrasporti Eccezionali S.R.L. | It-Cap 74016 Hamlet | 2019 |
| Societe Generale | Oslo | 1995 |
| Society of Maritime Industries Limited Nuf | London Ec2R 8Ay | 2012 |
| Société Européenne De Cardiologie | 06903 Sophia Antipolis | 2014 |
| Socrates AB | Se-645 42 Strängnäs | 2019 |
| Sodexo Remote Sites the Netherlands B.V. | 1625Hv Hoorn | 2012 |
| Sodexo Strategic Accounts Limited Nuf | London Wc1B 5Ha | 2026 |
| Sofie Forsaa Holding AS | Moss | 2023 |
| Sofies Reiser AS | Moss | 2023 |
| Sofistikerte Beats Da | Tromsø | 2018 |
| Sofos Partnership SL | Oslo | 2014 |
| Softbank Robotics UK Limited | London E1W 1Dd England | 2020 |
| Softland AS | Nesttun | 2002 |
| Soggebrekken Holding AS | Kongsberg | 2009 |
| Sogn Bubil AS | Høyanger | 2020 |
| Sogn Eigedomsdrift AS | Sogndal | 2016 |
| Sogn Elsykkel AS | Sogndal | 2019 |
| Sogn Fasadevask AS | Sogndal | 2022 |
| Sogn Transportservice AS | Leikanger | 2022 |
| Sognasmak AS | Lærdal | 2022 |