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| Sparebank 1 Regnskapshuset Valhall AS | Nesbyen | 1998 |
| Sparebank 1 Regnskapshuset Østfold Akershus AS | Grålum | 1993 |
| Sparebank 1 Sør-Norge Forretningspartner AS | Stavanger | 2007 |
| Sparebank 1 Økonomihuset AS | Hønefoss | 1997 |
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| Spareblikk AS | Østerås | 2025 |
| Sparepartner Investeringsrådgivning AS | Gressvik | 2007 |
| Spark Forlag AS | Oslo | 2024 |
| Spark Management AS | Sem | 2024 |
| Spark Motorsport AS | Hakadal | 2015 |
| Spark Studio AS | Trondheim | 2012 |
| Sparkcognition Inc | Austin Tx 78759 | 2020 |
| Sparks AS | Asker | 2014 |
| Sparks Consultancy AS | Bru | 2026 |
| Sparks Geological Services Limited | Barry Cf62 4La | 2019 |
| Sparring Partner AS | Tønsberg | 2000 |
| Sparringspartner AS | Tolvsrød | 2019 |
| Sparringspartneren AS | Sand | 2022 |
| Sparrows Baricon Limited | Ab23 8Jw Aberdeen Scotland | 2013 |
| Sparta Visual AS | Oslo | 2016 |
| Spartacus Holding AS | Oslo | 2012 |
| Spartan Media Nordic AS | Flekkefjord | 2021 |
| Sparx Engineering Norway AS | Oslo | 2025 |
| Spaserforeningen AS | Oslo | 2018 |
| SPC AS | Borgen | 2013 |
| SPC Partners AS | Oslo | 2021 |
| SPC Subsea Ltd | Angus Dd10 8Sw Scotland | 2023 |
| Spctr AS | Oslo | 2021 |
| Spctr Holding AS | Oslo | 2023 |
| Spctr Media AS | Oslo | 2023 |
| SPD Teknologier AS | Asker | 2025 |
| Spe AS | Stolmen | 2010 |
| Spearpoint Consulting AS | Haslum | 2017 |
| Speccoco AS | Nordfold | 2021 |
| Special Energy Services AS | Stavanger | 2022 |
| Special Needs Toys Norway AS | Siggerud | 2024 |
| Specialised Quality Management Services Ltd | Aberdeen Ab12 3Lf Scotland | 2019 |
| Specialist Survey Management Limited | London Wc2H 9Jq England | 2023 |
| Specifique Norge AS | Oslo | 1999 |
| Specken Hydraulics | 3264 Xv Nieuw-Beijerland | 2013 |
| Spectacular Norway AS | Tonstad | 2024 |
| Spectagon Hodling AS | Oslo | 2020 |
| Specter Konsult AS | Sandefjord | 2021 |
| Spectra Da | Tønsberg | 1998 |
| Spectra Geophysical AS | Sandnes | 2018 |
| Spectra Rope Access NDT Limited | Ta20 1Jh Sommerset | 2015 |
| Spectra Rope Access NDT Limited | Ta201Jh Somerset | 2015 |
| Spectre AS | Bryne | 2019 |
| Spectre Capital AS | Oslo | 2015 |
| Spectrum Blue AS | Sandnes | 2022 |
| Spectrum Designs Consultancy Limited | Gb-Kincardineshire Ab39 2Dz | 2018 |
| Speed Arkitekter AS | Oslo | 2018 |
| Speedi Brannservice Ans | Oslo | 2000 |
| Speedia AS | Torvastad | 2021 |
| Speedkey AS | Mandal | 2019 |
| Speedway Consult AS | Asker | 2012 |
| Speedy Pete AS | Oslo | 2021 |
| Speedy Togkasino Da | Stabekk | 2000 |
| Speeron AS | Oslo | 2013 |
| Speewell AS | Bærums Verk | 2007 |
| Speira UK Limited | Worcestershire Wr11 4Eu | 2024 |
| Speis Norge AS | Fana | 2023 |
| Spekkhogger AS | Vågaholmen | 2013 |
| Spekter AS | Skien | 1988 |
| Spekter Reklame AS | Skien | 2006 |
| Spektercom AS | Ås | 2026 |
| Spektor Advokat AS | Brekstad | 2014 |
| Spektra AS | Granli | 2014 |
| Spektra Regnskap AS | Oslo | 2014 |
| Speleoconsult AS | Horten | 2019 |
| Spelsberg Norge AS | Jessheim | 2018 |
| Spencer Consulting AS | Grimstad | 2021 |
| Spennteknikk Construction AS | Kongsvinger | 2012 |
| Spensten AS | Oslo | 2019 |
| Speo Products AS | Kristiansand S | 2015 |
| Spera AS | Verdal | 2016 |
| Sperans AS | Ranheim | 2022 |
| Spermatech AS | Oslo | 2002 |
| Spermvital AS | Hamar | 2008 |
| Sperre Executive Search AS | Ålesund | 2023 |
| Sperrevik Plan & Varsling AS | Lysekloster | 2025 |
| Spes AS | Oslo | 2026 |
| Spes Bona AS | Molde | 2013 |
| Spesialgrossisten AS | Larvik | 2019 |
| Spesialtakst AS | Bryne | 2019 |
| Spesielt Interessert AS | Lysekloster | 2022 |
| Spesmedico Invest Limited Nuf | Stavanger | 2010 |
| Spetaclus AS | Ski | 2021 |
| Spetals Verk AS | Kongsvinger | 2025 |
| Spets Industries AS | Oslo | 2019 |
| Spex Corporate Holdings Limited | Aberdeen Ab10 6Xu Scotland | 2019 |
| Spex Offshore (UK) Limited | Aberdeen Ab10 6Xu | 2017 |
| Spex Offshore Limited | Aberdeen Ab21 0Fn | 2014 |
| Spf/Tlc | Fo-100 Torshavn | 2014 |
| Spgr Institute AS | Bjørnemyr | 1993 |
| Spheero AS | Klokkarvik | 2021 |