| Seafox Management Consultants AS | Professional & scientific | 2024 |
| Seafront Eiendom AS | Real estate | 2006 |
| Seafront Group AS | Transport & logistics | 2003 |
| Seafront Holding AS | Transport & logistics | 1999 |
| Seafront Maritime AS | Professional & scientific | 1994 |
| Seafront Mjåvann AS | Transport & logistics | 2022 |
| Seafront Norsteve AS | Transport & logistics | 2006 |
| Seagull Management AS | Professional & scientific | 2005 |
| Sealution AS | Wholesale & retail | 2022 |
| Seaquest AS | Administrative & support | 2008 |
| Search Lift AS | Professional & scientific | 2025 |
| Seasafe Solutions AS | Professional & scientific | 2008 |
| Seat Innovation AS | Manufacturing | 2008 |
| Sebastian Capital AS | | 2024 |
| Sebastian Ribe AS | Construction | 2021 |
| Seberg Invest AS | Real estate | 2021 |
| Second Phase Analytics AS | Information & communication | 2026 |
| Seeall AS | Construction | 2018 |
| Seek Bygg AS | Construction | 2020 |
| Segberg Holding AS | | 2023 |
| Seico AS | Real estate | 2016 |
| Seil Arkitekter AS | Professional & scientific | 2008 |
| Seilservice AS | Manufacturing | 2021 |
| Seland Holding AS | | 2023 |
| Selebro AS | Information & communication | 2014 |
| Selectionpartner AS | Professional & scientific | 2011 |
| Seljevoll Holding AS | Administrative & support | 2021 |
| Sella AS | Wholesale & retail | 2025 |
| Selmar Invest AS | Real estate | 2005 |
| Selskabet AS | Financial services | 2020 |
| Selskap & Event Holding AS | Hospitality | 2017 |
| Selskapelig AS | Wholesale & retail | 2016 |
| Semine AS | Information & communication | 2015 |
| Semsbyveien 112 AS | Real estate | 2020 |
| Semsbyveien 124 AS | Real estate | 2004 |
| Semsvegen 41 AS | Real estate | 2022 |
| Senaible AS | Information & communication | 2023 |
| Sendit AS | Construction | 2003 |
| Senior Pomodor AS | | 2024 |
| Sens Bil AS | Wholesale & retail | 2015 |
| Senso Myhrstad Invest AS | | 2004 |
| Senta Bygg & Invest AS | Construction | 2011 |
| Senter for Prestasjonscoaching Ans | Education | 2005 |
| Senter Invest AS | Real estate | 2002 |
| Sentient Energy AS | Professional & scientific | 2018 |
| Sentrum Legesenter Kristiansand AS | Health & social care | 2019 |
| Sentrumklinikken AS | Health & social care | 2011 |
| Sentrumsbolig AS | Real estate | 2025 |
| Sergio Bygg AS | Construction | 2013 |
| Serine Jeremiassens Gate 4 AS | Real estate | 2015 |
| Service & Transport AS | Transport & logistics | 2018 |
| Service Mannen Vest Agder Da | Administrative & support | 2002 |
| Service Og Vedlikehold Sør AS | Wholesale & retail | 2021 |
| Servicelinjen AS | Other services | 2022 |
| Serviceringen AS | Administrative & support | 2023 |
| Ses Invest AS | Financial services | 2005 |
| Sesserud Skog Ans | Agriculture & fishing | 2015 |
| Setesdalsveien 17 AS | Real estate | 2023 |
| Setesdalsveien Senter AS | Real estate | 1974 |
| Setesdølen Kulturhus AS | Hospitality | 2015 |
| Settler Technology AS | Information & communication | 2025 |
| Sev Invest AS | Real estate | 2007 |
| Seven Agency AS | Wholesale & retail | 2012 |
| Seven Yield 7500 Pctc 1 AS | Transport & logistics | 2016 |
| Seven Yield 7500 Pctc 2 AS | Transport & logistics | 2016 |
| Sevira Invest 1 AS | Real estate | 2018 |
| SF-1 Eiendom AS | Real estate | 2021 |
| Sf-Anlegg Ans | Wholesale & retail | 2005 |
| Sf-Holding AS | Construction | 2010 |
| SFT-2 AS | Other services | 2012 |
| SFT-3 AS | Other services | 2010 |
| SFT-4 AS | Arts & recreation | 2016 |
| SFV AS | Professional & scientific | 2022 |
| SG Anneberg Transport AB | Transport & logistics | 2011 |
| SG Legal Search AS | Administrative & support | 2017 |
| SGH AS | Hospitality | 2011 |
| Sgo Invest AS | Financial services | 2005 |
| SGT Eiendom AS | Real estate | 2009 |
| SH Entreprenør AS | Real estate | 2023 |
| SH Service Og Montasje AS | Construction | 2015 |
| Sh-Gruppen Ans | Wholesale & retail | 2012 |
| Sh.Holding AS | Real estate | 2010 |
| Shake N' Bake Holding AS | Financial services | 2017 |
| Shams Pizza AS | Hospitality | 2026 |
| Shapes Fitness Norge AS | Other services | 2010 |
| Sheridan AS | Professional & scientific | 2017 |
| Shero AS | Wholesale & retail | 2025 |
| Shift-Tech AS | Information & communication | 2021 |
| Shipping Partner AS | | 1986 |
| Shoppin AS | Information & communication | 2024 |
| Show Power Da | Wholesale & retail | 1999 |
| Shu Trading AS | Wholesale & retail | 2016 |
| Si Ja Til Mer AS | | 2024 |
| Si-Tron Holding AS | Real estate | 2007 |
| Sia Invest AS | Real estate | 2018 |
| Sialo AS | Professional & scientific | 2024 |
| Sics System AS | Information & communication | 2015 |
| Sicuro Consulting AS | Information & communication | 2019 |
| Siei AS | | 2020 |
| Siem Car Carriers AS | Transport & logistics | 2008 |