| Josvi Holding AS | | 2025 |
| Jotun Regnskap AS | Real estate | 2001 |
| Joud Holding AS | Real estate | 2024 |
| Jovial Kapital AS | Health & social care | 2019 |
| Joyneer AS | Information & communication | 2023 |
| JP Trading AS | Wholesale & retail | 2012 |
| JP Well Engineering AS | Professional & scientific | 2025 |
| Jpt-Invest AS | | 2022 |
| Jr-Invest AS | Financial services | 2008 |
| JS Services AS | Professional & scientific | 2008 |
| JSG Consulting AS | Professional & scientific | 2017 |
| JSL Housing AS | Real estate | 2019 |
| JSL Håndtverk AS | Construction | 2023 |
| Jstar Holding AS | Financial services | 2018 |
| JSZ Technology Investment AS | Professional & scientific | 2018 |
| JT Servering AS | Hospitality | 2005 |
| Jta Holding AS | Financial services | 2018 |
| Jte Holding AS | Wholesale & retail | 2018 |
| JTK Eiendom AS | Real estate | 2026 |
| JTN Invest AS | Real estate | 2019 |
| Judith Ulsund AS | | 2021 |
| Juis Johnsen Invest AS | Professional & scientific | 2020 |
| Jukalo Invest AS | | 2018 |
| Julan AS | Professional & scientific | 2022 |
| Julle AS | | 2025 |
| Jumalauta AS | Hospitality | 2026 |
| Juna Cosmetics AS | Other services | 2023 |
| Junkyard Studio AS | Wholesale & retail | 2015 |
| Jupadal Invest AS | | 2021 |
| Jupiter Produksjon AS | Financial services | 2007 |
| Justclipper AS | Transport & logistics | 2023 |
| Justify Advokatfirma AS | Professional & scientific | 2018 |
| Justify AS | Information & communication | 2017 |
| Juto AS | Administrative & support | 2005 |
| JV Audit AS | Professional & scientific | 2016 |
| JV Invest AS | | 2013 |
| JZ Eiendom AS | Real estate | 2019 |
| JZC AS | Professional & scientific | 2025 |
| JZF Holding AS | Real estate | 2022 |
| Jåke Holding AS | | 2023 |
| Jål Holding AS | Financial services | 2017 |
| Jåsundbakken 2 AS | Real estate | 2023 |
| Jåttå Gårdsbryggeri AS | Manufacturing | 2018 |
| Jåttå Mikrogartneri Da | Agriculture & fishing | 2023 |
| Jåttå Tomteselskap AS | Real estate | 2018 |
| Jåttå Utbyggingsselskap AS | Real estate | 2005 |
| Jåttånuten Investering & Rådgivning AS | Professional & scientific | 2024 |
| Jåttåveien 53 Eiendom Ans | Real estate | 1997 |
| Jåttåvågen B1 AS | Real estate | 2025 |
| Jåttåvågen Brygge AS | Real estate | 2001 |
| JÅTTÅVÅGEN2 AS | Real estate | 2017 |
| Jåtun Landbrukslag SA | Agriculture & fishing | 1897 |
| Jåtunbakken AS | Real estate | 2021 |
| Jåtunhøyden AS | Real estate | 2020 |
| Jåtunparken AS | Real estate | 2021 |
| Jåtunparken Næring AS | Real estate | 2025 |
| Jåtunringen Andeler AS | Real estate | 2024 |
| Jåtunringen AS | Real estate | 2021 |
| Jæren Dykkersenter AS | Wholesale & retail | 1993 |
| Jæren Egg AS | Wholesale & retail | 2015 |
| Jæren Eiendom AS | Real estate | 2021 |
| Jæren Energi AS | Energy | 2001 |
| Jæren Energi Holding AS | Manufacturing | 2017 |
| Jæren Multi Service AS | Construction | 2026 |
| Jærmegleren AS | Real estate | 1997 |
| Jærsk Hydro AS | Wholesale & retail | 2023 |
| Jønsson Worren Entreprenør AS | Professional & scientific | 1998 |
| Jørmeland Holding AS | Administrative & support | 2020 |
| Jørpeland Kraft AS | Energy | 1991 |
| Jøtronic Elektro AS | Manufacturing | 1997 |
| K & K Scandservices Da | Administrative & support | 2002 |
| K a Evjeberg AS | Financial services | 2005 |
| K a P - Kontor for Arkitektur Og Plan AS | Professional & scientific | 2006 |
| K Bergesen AS | Professional & scientific | 2022 |
| K Whisky Invest AS | Administrative & support | 2022 |
| K&B Future AS | Professional & scientific | 2023 |
| K&K Eiendom AS | Real estate | 2019 |
| K&K Invest AS | Financial services | 2017 |
| K&M Invest AS | Real estate | 2025 |
| K&M Vestre Platå AS | Real estate | 2025 |
| K-Media AS | Information & communication | 2011 |
| K. Aalén AS | Wholesale & retail | 2009 |
| K. Holm Holding AS | Transport & logistics | 2022 |
| K. Holm Transport AS | Transport & logistics | 2018 |
| K. Isaksen Holding AS | Health & social care | 2020 |
| K. Nygaard AS | Administrative & support | 2003 |
| K.Fossan AS | | 2020 |
| K2 Bolig AS | Real estate | 2016 |
| K2 Hodne Larsen AS | Education | 2008 |
| K2 Industri AS | Real estate | 2018 |
| K2 Stavanger AS | Real estate | 2009 |
| K2-RELOG Industrieiendom AS | Real estate | 2022 |
| Ka Trading AS | Wholesale & retail | 2023 |
| Kaada Produksjoner AS | Arts & recreation | 2026 |
| Kaanestad AS | | 2023 |
| Kaar Invest AS | Professional & scientific | 2014 |
| Kaarsve Invest AS | Professional & scientific | 2016 |
| Kaasen Invest AS | Financial services | 2005 |
| KAB71 Holding AS | | 2024 |
| Kabal AS | Information & communication | 2011 |