| Schøne Invest AS | Skien | 2021 |
| Schütt Forever AS | Nøtterøy | 2019 |
| Schütt Happens AS | Oslo | 2017 |
| Sci AS | Trondheim | 2009 |
| Sci Group AS | Rud | 2005 |
| Sci-Fi Food AS | Trondheim | 2017 |
| Sciadonic AS | Ålesund | 2014 |
| Science Communication Accelerator AS | Trondheim | 2021 |
| Sciencons AS | Oslo | 2014 |
| SCIENTIFIC DRILLING CONTROLS LTD Forretningsavdeling av utenlandsk foretak NUF | Sandnes | 1995 |
| Scientific Perspectives AS | Fjerdingby | 2013 |
| Scientist Factory AS | Oslo | 2017 |
| Scifish Animalia AS | Oslo | 2022 |
| Scilla AS | Stabekk | 2007 |
| Scipio AS | Oslo | 2005 |
| Scistron AS | Mosjøen | 2013 |
| Scitech Engineering Ltd | Surrey Gu7 1Ey | 2020 |
| Scitus AS | Stavanger | 2019 |
| SCL Norge AS | Drammen | 2006 |
| Scleromax AS | Oslo | 2021 |
| SCM Consulting AS | Kolbotn | 2006 |
| SCM Instruments Limited | Middlesbrough Ts6 0Ng | 2012 |
| SCM Partner AS | Stord | 2022 |
| Scma AS | Oslo | 2008 |
| Scofield Richard | Davidson Mi 48423 | 2015 |
| Scogi Consulting Limited | Devon Ex4 4Hf | 2011 |
| Scons AS | Godvik | 2022 |
| Scoop Agency AS | Fornebu | 2014 |
| Scope Group AS | Oslo | 2020 |
| Scope Service AS | Sandnes | 2022 |
| Scope Value AS | Oslo | 2020 |
| Score Business Services AS | Oslo | 2014 |
| Score Diagnostics Limited | Aberdeenshire Ab42 3Ae | 2014 |
| Score Innovation AS | Sola | 2017 |
| Scorpio Consult AS | Oslo | 2000 |
| Scorpus 90 AS | Oslo | 2023 |
| Scotcoil Limited | Angus Dd11 2Bz Scotland | 2017 |
| Scotlink Konsult | Se-416 68 Göteborg | 2011 |
| Scott Energy Invest AS | Oslo | 1993 |
| Scott House Consulting AS | Høvåg | 2024 |
| Scott Management AS | Kolbotn | 2013 |
| Scott Shields Consulting Ltd | Dn6 8Da Doncaster | 2014 |
| Scott Solutions AS | Søreidgrend | 2025 |
| Scott's Oil Fields Services Ltd | Cambridgeshire Cb25 9P | 2019 |
| Scott-Grande AS | Revetal | 2020 |
| Scottish Enterprise | Stavanger | 2012 |
| Scout Cctv AS | Tananger | 2020 |
| Scout Solution AS | Oslo | 2021 |
| Scoutdi AS | Trondheim | 2017 |
| Scouting AS | Stavanger | 2007 |
| Scouting Da | Stavanger | 1999 |
| Screaton and Associates Ltd | Durham Dh1 1Th | 2024 |
| Screen Publishing AS | Kristiansand S | 2016 |
| Screenresort Holding AS | Bergen | 2017 |
| Scrive AS | Oslo | 2019 |
| Scrowther Engineering (UK) Limited | Gb-Cheadle St10 1Ar, Staffordshire | 2019 |
| Scrubbies AS | Frogner | 2024 |
| Scuderia Energia AS | Stavanger | 2023 |
| SCV Konsulenttjenester AS | Hjelset | 2024 |
| SD Consulting AS | Flekkefjord | 2022 |
| SD Nordics AS | Oslo | 2022 |
| SD Nordics Holding AS | Hosle | 2023 |
| SD Solutions AS | Raufoss | 2024 |
| SD Subsea Ltd | Gb-Turriff Ab53 5Wj | 2018 |
| SD Worx Services Norway AS | Oslo | 2026 |
| Sdcc Solutions AS | Søreidgrend | 2017 |
| SDG AS | Ulsteinvik | 2016 |
| SDG Design Studio AS | Oslo | 1987 |
| Sdi Media Scandinavia AB | 102 71 Stockholm | 2007 |
| SDK Consult AS | Fjerdingby | 2026 |
| SDK Holding AS | Fjerdingby | 2015 |
| SDL Norway Nuf | Oslo | 2003 |
| SDN Oppmåling AS | Lillestrøm | 2006 |
| Sdpd-Plm Consult AS | Kongsberg | 2016 |
| SDR Design Limited | Aberdeenshire Ab51 4Lt Scotland | 2016 |
| SDS Holding AS | Oslo | 2005 |
| SDV Fenchurch Advokatfirma AS | Oslo | 2025 |
| SE De AS | Kristiansand S | 2018 |
| SE Energi & Klima | Esbjerg N | 2016 |
| SE Rigging & Lifting Ltd | Seaham Sr7 7We | 2025 |
| Se-Arkitektur AS | Bergen | 2004 |
| Se-Consult AS | Gjettum | 2024 |
| Se-Det Holding AS | Odda | 2010 |
| Se-Es AS | Bergen | 2006 |
| Se-Holding AS | Rådal | 2005 |
| Sea Accounting AS | Oslo | 2023 |
| Sea Angel AS | Bønes | 2019 |
| Sea Breeze Electrical Consulting AS | Haugesund | 2023 |
| Sea Consulting AS | Ås | 2012 |
| Sea Cross Marine AB Nuf | 181 55 Lidingö | 2025 |
| Sea Eagle AS | Rakkestad | 2020 |
| Sea Eco AS | Harstad | 1996 |
| Sea Entek AS | Tananger | 2021 |
| Sea Growth Solutions Da | Moltustranda | 2016 |
| Sea Management AS | Stårheim | 2023 |
| Sea Management Engineering AS | Stårheim | 2026 |
| Sea Management Holding AS | Stårheim | 2012 |
| Sea Marin AS | Ski | 1980 |
| Sea Motion Energy AS | Åkrehamn | 2005 |
| Sea One AS | Tønsberg | 2020 |