| Sorte Fonds Da | Professional & scientific | 2000 |
| Sound of Rain AS | Information & communication | 2024 |
| Spansk Fun Ordlistekompani Da | Professional & scientific | 2000 |
| Sparpengerno Da | Information & communication | 2000 |
| Specter Invest AS | Administrative & support | 2005 |
| Speedy Togkasino Da | Professional & scientific | 2000 |
| Spill Albi Da | Professional & scientific | 2000 |
| Spilling Consult AS | Professional & scientific | 2020 |
| Spinsite Consulting Nuf | Information & communication | 2005 |
| SPP Holding AS | Professional & scientific | 2023 |
| Springtime Facilities AS | Professional & scientific | 2013 |
| SPT Norge AS | Education | 2017 |
| Stabekk Alpintustyr Og Staver Da | Professional & scientific | 2000 |
| Stabekk Apotek AS | Wholesale & retail | 2022 |
| Stabekk Bad AS | Construction | 2025 |
| Stabekk Bygg Og Trepleie AS | Construction | 2025 |
| Stabekk Eiendomsforvaltning AS | Real estate | 2015 |
| Stabekk Eiendomsmegling AS | Real estate | 2007 |
| Stabekk Fan Parkering Da | Professional & scientific | 2000 |
| Stabekk Grill AS | Hospitality | 2016 |
| Stabekk Invest AS | | 2024 |
| Stabekk Kamera Bestitest Da | Professional & scientific | 2000 |
| Stabekk Legesenter Da | Health & social care | 2013 |
| Stabekk Nevrokiropraktiske AS | Health & social care | 2015 |
| Stabekk Optiske AS | Wholesale & retail | 1985 |
| Stabekk Rørlegger Service AS | Construction | 2021 |
| Stabekk Sushi AS | Hospitality | 2015 |
| Stabekkguidene Pboks Da | Professional & scientific | 2000 |
| Stabekklinikken AS | Health & social care | 2018 |
| Stabæk Industrier AS | | 2024 |
| Star Floss AS | Professional & scientific | 2016 |
| Stavangertorgetno Da | Information & communication | 2000 |
| Stemi AS | | 2018 |
| Stempel Slanking Da | Professional & scientific | 2000 |
| Sten Og Interiør AS | Wholesale & retail | 2017 |
| Sti Design Og Nettverk AS | Information & communication | 2021 |
| Stjernetegn Og Mus Da | Professional & scientific | 2000 |
| Stoko Invest AS | | 2023 |
| Stoneware AS | Wholesale & retail | 2022 |
| Storgaten Frimerker Og Mynter Da | Professional & scientific | 2000 |
| Storgatens Leger & Kiss Company Da | Professional & scientific | 2000 |
| Stortromme AS | | 2022 |
| Straka AS | Professional & scientific | 2021 |
| Strand Barnehage SA | Education | 1987 |
| Strand Selskapslokaler AS | Hospitality | 2025 |
| Strategica Holding AS | Professional & scientific | 1996 |
| Strategica People and Processes AS | Professional & scientific | 1999 |
| Strelli Consulting AS | Information & communication | 2020 |
| Strelli Holding AS | Information & communication | 2020 |
| Strindberg Kjeveortopedi AS | Health & social care | 2021 |
| Studieforlaget AS | Information & communication | 2012 |
| Studio Bosted AS | Professional & scientific | 2024 |
| Studio Hus AS | Wholesale & retail | 2019 |
| Studio Hus Interiør AS | Professional & scientific | 2026 |
| Studio Stabekk AS | Information & communication | 2024 |
| Styre Consulting AS | Real estate | 2005 |
| Styre Eiendom AS | Real estate | 1998 |
| Styreinvest AS | Real estate | 2005 |
| Styx Holding AS | | 2025 |
| Stålmaur AS | | 2021 |
| Sugarloaf Propco 1 AS | Real estate | 2005 |
| Sugarloaf Propco 2 AS | Real estate | 2025 |
| Sukkerspinn Familiebarnehage - Charlotte Filberg-Kaspersen AS | Education | 2026 |
| Sukkerspinn Familiebarnehage Da | Education | 2014 |
| Suma Arkitektur AS | Professional & scientific | 2023 |
| Sund-Mathisen Holding AS | | 2023 |
| Sundtjønnskarven Avløpsanlegg SA | Water & waste | 2025 |
| Sunrise Invest AS | Information & communication | 2016 |
| Superliminal AS | Financial services | 2011 |
| Suril AS | Information & communication | 2022 |
| Svansen Invest AS | | 2025 |
| Svegro-Teknisk AS | Real estate | 1961 |
| Svensk Iq Og Konsentrasjonsselskap Da | Professional & scientific | 2000 |
| Svetor Eiendom AS | Real estate | 1962 |
| Sykkel & Moped & Tursekker Da | | 2000 |
| Sykkelguttas Mopeder Og Hjelmer Da | Professional & scientific | 2000 |
| Symmetria AS | | 2024 |
| Synergize AS | Professional & scientific | 2011 |
| Syngende Onsdag Da | Professional & scientific | 2000 |
| T5 Invest AS | Real estate | 2017 |
| Tack AS | | 2025 |
| Takst Ingeniorer Da | Professional & scientific | 2000 |
| Takstsenteret AS | Real estate | 1989 |
| Talent Invest AS | | 2022 |
| Tamburin Film AS | Information & communication | 2014 |
| Tang Invest AS | | 2026 |
| Tannlegerno Da | Administrative & support | 1999 |
| Tannverket AS | Manufacturing | 2013 |
| Tannverket Holding AS | Manufacturing | 1996 |
| Tappenberg Equity AS | | 2015 |
| Taro Holding AS | | 2022 |
| Tax Og Hoteller Da | Professional & scientific | 2000 |
| Taxino Da | Information & communication | 1999 |
| Te Og Kiosk Da | Professional & scientific | 2000 |
| Teateragentene Da | Arts & recreation | 2017 |
| Tek-Norge AS | Professional & scientific | 2017 |
| Tek-Zence AS | Wholesale & retail | 2018 |
| Teldar Paper Inc AS | Real estate | 2005 |
| Telemark Consulting AS | Professional & scientific | 2017 |
| Teppeforum AS | Wholesale & retail | 2015 |