| Scan Mar AS | Wholesale & retail | 1989 |
| Scan Supplies AS | Wholesale & retail | 1992 |
| Scandinavian Cigar Group Da | Wholesale & retail | 1997 |
| Scandinex Logistics AS | Transport & logistics | 2020 |
| Scantra Ans | | 1992 |
| Scarp AS | Information & communication | 2016 |
| Schmidt Technologies AS | | 2026 |
| Schou Holding AS | | 2024 |
| Sciadonic AS | Professional & scientific | 2014 |
| SCP Ortopedi AS | Wholesale & retail | 2017 |
| SE Deg Rundt AS | Construction | 2014 |
| Sea Energy AS | Transport & logistics | 2022 |
| Sea Fish Group AS | Agriculture & fishing | 2021 |
| Sea Group AS | | 2020 |
| Sea Marine AS | Transport & logistics | 2021 |
| Sea Ocean AS | Transport & logistics | 2021 |
| Sea Ship III AS | Transport & logistics | 2023 |
| Sea Ship Invest AS | Transport & logistics | 2022 |
| Sea Shipping AS | Transport & logistics | 2022 |
| Sea Solution AS | Professional & scientific | 2013 |
| Sea Tug AS | Transport & logistics | 2021 |
| Seafarmers AS | Agriculture & fishing | 2000 |
| Seafomar AS | Real estate | 2013 |
| Seagrasp AS | Hospitality | 2014 |
| Seamt Invest AS | Real estate | 2010 |
| Seaonics AS | Professional & scientific | 2011 |
| Seas Spjelkavik Elektro AS | Construction | 1998 |
| Seasafe Norway AS | Manufacturing | 2014 |
| Seatech AS | Wholesale & retail | 2003 |
| Seawest AS | Wholesale & retail | 2023 |
| Seawest Holding AS | Wholesale & retail | 2023 |
| Second Hand AS | Wholesale & retail | 2024 |
| Secure Connected AS | Administrative & support | 2008 |
| Sefi Invest AS | | 2025 |
| Seilmaker'N AS | Manufacturing | 2007 |
| Selective Norge AS | Other services | 2014 |
| Selinge Holding AS | Real estate | 2007 |
| Selje Holding AS | | 2020 |
| Selje Nabben 90 AS | Real estate | 2024 |
| Selje Real Estate AS | Real estate | 2025 |
| Selliseth Drift AS | Health & social care | 2018 |
| Selliseth Invest AS | | 2018 |
| Sembl AS | Information & communication | 2023 |
| Sensicare AS | Wholesale & retail | 2000 |
| Sensnet Analytics AS | Information & communication | 2024 |
| Senthor Eiendom AS | Real estate | 2024 |
| Sentralt AS | Wholesale & retail | 2024 |
| Sentrum Tannklinikk Ålesund AS | Health & social care | 2024 |
| Serf Invest AS | | 2023 |
| Sertek AS | Construction | 2002 |
| Serverdrift AS | Information & communication | 2004 |
| Service First No AS | Information & communication | 2024 |
| Serviceconsult AS | Professional & scientific | 1993 |
| Servicesenteret AS | Other services | 1985 |
| Serviro AS | Information & communication | 2025 |
| Setheni Holding AS | | 2022 |
| Setrevegen 2 AS | Real estate | 2013 |
| Severin Holding AS | | 2022 |
| SFS Management AS | Arts & recreation | 2015 |
| SG Logistics AS | Transport & logistics | 2005 |
| SG Saks AS | Other services | 2019 |
| Sgiske Invest AS | | 2025 |
| SGN AS | Real estate | 2024 |
| SGN Holding AS | Real estate | 2023 |
| Sgsaa Invest AS | | 2025 |
| Sh-Aktiv AS | | 2025 |
| SHANTY1 AS | Real estate | 2012 |
| Shari AS | Real estate | 2011 |
| Sharpnet AS | Information & communication | 2015 |
| Sharptech Da | Information & communication | 2015 |
| Shas Holding AS | Real estate | 2019 |
| Shavn Holding AS | Real estate | 2019 |
| Shen Consulting AS | Information & communication | 2019 |
| Shen Holding AS | Information & communication | 2022 |
| Shiparo AS | Professional & scientific | 1998 |
| Shiplight AS | Wholesale & retail | 2025 |
| Shipmed AS | Health & social care | 2018 |
| Shoeconsult AS | Wholesale & retail | 2001 |
| Shop by Sorthe AS | Wholesale & retail | 2023 |
| Sibas Seafood AS | Wholesale & retail | 2023 |
| Sibelia AS | Wholesale & retail | 2000 |
| Sibelia Invest AS | Manufacturing | 2005 |
| Sigbjørn Andersen Snekkerservice AS | Construction | 2022 |
| Sigmat AS | | 2022 |
| Sigterm AS | Information & communication | 2016 |
| Sikkerhet 24 AS | Construction | 2000 |
| Silje Godø AS | | 2024 |
| Siloso Holding AS | | 2026 |
| Silseth Invest AS | Wholesale & retail | 2015 |
| Silver Holdings AS | Transport & logistics | 2014 |
| Silver Premium Seafood AS | Wholesale & retail | 2002 |
| Silver Sveggis AS | | 2025 |
| Silvercom AS | Professional & scientific | 2024 |
| Silverwing Market AS | Education | 2026 |
| Simart AS | Wholesale & retail | 2014 |
| Simon Arvesen Invest AS | Real estate | 2014 |
| Simsalabygg AS | Construction | 2026 |
| Sindre Vedvik Agenturer A/S | Wholesale & retail | 1988 |
| Sinec AS | Real estate | 2008 |
| Sinec Eiendom AS | Real estate | 2018 |