| Skoleveien 7 AS | Real estate | 2025 |
| Skont Productions Da | Information & communication | 2016 |
| Skretting Eiendom AS | Real estate | 2012 |
| Skretting Holding AS | Real estate | 2015 |
| Skvadronveien 19 AS | Real estate | 2017 |
| Sky Enterprise AS | | 2015 |
| Skyland Sandnes AS | Arts & recreation | 2025 |
| Skylight AS | Information & communication | 2018 |
| Skylink Nexus AS | Professional & scientific | 2026 |
| Skystream Norway AS | Information & communication | 2024 |
| Skårland Holding AS | Real estate | 2014 |
| SL Asia AS | Wholesale & retail | 2026 |
| SL Financing AS | Administrative & support | 2025 |
| Slakthusbakken AS | Construction | 2019 |
| Slethei Holding AS | Real estate | 2005 |
| Sletten Va-Drift SA | Water & waste | 2023 |
| Sletten Va-Utbygging SA | Construction | 2023 |
| Slingshot AS | Professional & scientific | 2020 |
| Sloane AS | Wholesale & retail | 2011 |
| SLP Invest AS | Information & communication | 2020 |
| SM Soland AS | Financial services | 2005 |
| Smak & Små AS | Wholesale & retail | 2012 |
| Smaksteknikk AS | Manufacturing | 1978 |
| Smalaveien 11 AS | Real estate | 2014 |
| Smart Delivery AS | Wholesale & retail | 2023 |
| Smart Elektro Service AS | Construction | 2016 |
| Smart Kompetanse AS | Education | 2007 |
| Smart Plants AS | Professional & scientific | 2022 |
| Smart Working AS | Professional & scientific | 2005 |
| Smarthotel Hammerfest Eiendom AS | Real estate | 2012 |
| Smartplan AS | Information & communication | 2016 |
| Smartsona AS | Information & communication | 2025 |
| Smashk AS | Real estate | 2015 |
| Smastt AS | Professional & scientific | 2022 |
| Smaug AS | | 2020 |
| SMB Prosjektering AS | Professional & scientific | 2022 |
| SMH Invest AS | Financial services | 2005 |
| Smieparken AS | Real estate | 2019 |
| Smith Mekservice AS | Manufacturing | 2023 |
| Smith Saddle Company AS | Other services | 2017 |
| Smorsgard Holding AS | | 2018 |
| SMS Fiskå Invest AS | | 2024 |
| Smurf Holding AS | | 2021 |
| Smådal Holding AS | Information & communication | 2017 |
| Småkraftkonsult AS | Professional & scientific | 2020 |
| Smålonane 18 AS | Real estate | 2026 |
| Snap Drill AS | Professional & scientific | 2018 |
| Snapcut Invest AS | Other services | 2019 |
| Snarstad AS | Real estate | 2012 |
| Snaxy AS | Wholesale & retail | 2022 |
| Snff AS | | 2021 |
| Snorland AS | Information & communication | 2006 |
| Snos Kvadrat AS | Wholesale & retail | 2025 |
| Snøreven AS | | 2022 |
| Sobrenia AS | Wholesale & retail | 2025 |
| Sockland Yard AS | Wholesale & retail | 2025 |
| Soena Holding AS | Real estate | 2005 |
| Softvask Systemer AS | Wholesale & retail | 2022 |
| Soiltech ASA | Water & waste | 2011 |
| Soiltech Offshore Services AS | Water & waste | 2013 |
| Soj Holding AS | | 2024 |
| Sokn Invest AS | Financial services | 2010 |
| Sol Kapital AS | | 2025 |
| Sol-Kraft AS | Wholesale & retail | 2022 |
| SOL3 Scientific AS | Professional & scientific | 2026 |
| Sola Bobil AS | Wholesale & retail | 2007 |
| Sola Gulv AS | Construction | 2009 |
| Sola Hangar AS | Real estate | 2003 |
| Sola Lavpris AS | Wholesale & retail | 2022 |
| Sola Lavpris Holding AS | Wholesale & retail | 2022 |
| Solakrossvegen 10 AS | Real estate | 2005 |
| Solbakken Blikk AS | Construction | 2016 |
| Soldal Holding AS | | 2005 |
| Soldal Invest AS | | 2003 |
| Solech Management AS | Professional & scientific | 2016 |
| Soleglad Utvikling AS | Real estate | 2019 |
| Solevia AS | Manufacturing | 2025 |
| Solhøgda 1 AS | | 2021 |
| Solhøgda Forvaltning AS | Real estate | 2007 |
| Sollesnes Holding AS | Real estate | 2012 |
| Sollund Invest AS | | 2020 |
| Solsenterdrift AS | Other services | 1998 |
| Solsiden 11 AS | Construction | 2011 |
| Solsiden 12 AS | Real estate | 2011 |
| Solsikken Helsekost AS | Wholesale & retail | 1998 |
| Solskjerming & Reklame AS | Construction | 2015 |
| Soltak AS | Construction | 2022 |
| Solutions 4 Turbines AS | Wholesale & retail | 2022 |
| Solutions Unlimited AS | Information & communication | 2024 |
| Solutions Unlimited Consulting AS | Information & communication | 2024 |
| Solvik-Olsen Revisjon AS | Professional & scientific | 2008 |
| Solway Subsea Engineering Ltd | Administrative & support | 2013 |
| Soma Gård AS | Arts & recreation | 2007 |
| Soma Jordbær Ans | Agriculture & fishing | 2003 |
| Soma' Eiendom AS | Real estate | 2022 |
| Somatorget AS | Wholesale & retail | 2013 |
| Somatorget Ved&Tre AS | Wholesale & retail | 2020 |
| Somax AS | Wholesale & retail | 2012 |
| Somi Klinikken AS | Other services | 2018 |
| Sommerfuglene AS | Administrative & support | 2012 |