| Jegfikkjobben AS | Kolbotn | 2016 |
| Jem Hall Coaching AS | Oslo | 2020 |
| Jenny Gjerløw AS | Oslo | 2023 |
| Jensrud Gårdsbarnehage AS | Blaker | 2023 |
| Jenssen Kompetanse AS | Melbu | 2025 |
| Jensvoll Barnehage AS | Bodø | 2006 |
| Jeriko Private Friluftsbarnehage Ans | Oslo | 1998 |
| Jeriko Private Friluftsbarnehage AS | Oslo | 2012 |
| Jesper T. Knutsen Trafikkskole AS | Oslo | 2024 |
| Jess! Trafikkskole AS | Mandal | 2012 |
| Jessheim Danseskole AS | Jessheim | 2014 |
| JHB Music Production AS | Kråkerøy | 2008 |
| JHK Trafikkskole AS | Tromsø | 2016 |
| Jiao Xie Senter for Kinesisk Kultur Og Språk AS | Stavanger | 2012 |
| Jim-Holding AS | Drøbak | 2012 |
| Jippi Univers AS | Stavanger | 2026 |
| Jivamukti Yoga AS | Stavanger | 2019 |
| JJ Kompetansetjenester AS | Rygge | 2020 |
| Jjperformance AS | Kvaløya | 2021 |
| JK Language Services Ans | Bergen | 2004 |
| JMP Consulting AS | Trondheim | 2014 |
| JMR AS | Lillehammer | 2022 |
| Jo Gjerstad Kulturformidling AS | Bergen | 2015 |
| Joar Solberg Trafikkskule AS | Sogndal | 1998 |
| Jobblivet AS | Vinstra | 2022 |
| Jobbstrekken AS | Oslo | 2019 |
| Jobcare AS | Husøysund | 2025 |
| Jobcoach Nuf | Gressvik | 2016 |
| Jobfit AS | Oslo | 2023 |
| Joblearn AS | Oslo | 1999 |
| Jobloop AS | Bergen | 2017 |
| Jobwell AS | Bergen | 2020 |
| Jochma Invest AS | Stavanger | 2021 |
| Johan Daniel Hætta AS | Kautokeino | 2015 |
| Johan Skjolden AS | Oslo | 2024 |
| Johansen Trafikkskole AS | Kongsberg | 2001 |
| John Erik Dukefoss & Kim Morgan Brekka Da | Kragerø | 2013 |
| John Martinsen Trafikkskole AS | Fredrikstad | 1981 |
| Johnsrudhuset Barnehage AS | Vestby | 2022 |
| Jolly Good Times Sailing AS | Reine | 2020 |
| Jonettaplassen Gårdsbarnehage AS | Klæbu | 2011 |
| Jonny Hesthammer AS | Bergen | 2005 |
| Jordbærstrået Fam. Barnehage AS | Vennesla | 2023 |
| Jorunn Krokeide AS | Oslo | 2020 |
| Josceefa Norge AS | Oslo | 2025 |
| Josef Akademi AS | Trondheim | 2015 |
| Josima AS | Brennåsen | 2012 |
| Jotunfjell Leirskole AS | Lom | 1996 |
| Jotunheimen Private Vidaregåande Skule AS | Lom | 2025 |
| Jotunheimen Vidaregåande Skule AS | Lom | 2024 |
| Joyfulcreation AS | Jessheim | 2026 |
| Joyyoga AS | Oslo | 2022 |
| JP Trafikkskole AS | Bergen | 2014 |
| JS Bygg & Undervisning AS | Porsgrunn | 2023 |
| Ju-Helse AS | Blommenholm | 2023 |
| Jubilo Musikkskole AS | Oslo | 2014 |
| Juc Norge AS | Oslo | 2021 |
| Judosenteret AS | Tveit | 2016 |
| Jugendby Barnehage AS | Ålesund | 2008 |
| Juhler AS | Oslo | 2026 |
| Julie Horne Academy AS | Oslo | 2024 |
| Julie Trafikkskole AS | Bodø | 2021 |
| Juliussen Trafikkskole AS | Tønsberg | 1986 |
| Juno Norge AS | Nesoddtangen | 2025 |
| Jupi-X Holding AS | Moss | 2022 |
| Just Bee AS | Lillesand | 2019 |
| Just Dance Da | Oslo | 2009 |
| Just Drive Trafikkskole AS | Kristiansand S | 2021 |
| Just Kidding Da | Fjellhamar | 2016 |
| Just Padel Rosten AS | Tiller | 2020 |
| Justunity AS | Oslo | 2015 |
| Jusutdanning AS | Oslo | 2018 |
| Jusutdanning Holding AS | Oslo | 2013 |
| Jusutdanning Høyere Utdanning AS | Oslo | 2023 |
| Jåddåren Gårdsbarnehage AS | Beitstad | 2015 |
| Jåi Invest 2 AS | Sandeid | 2016 |
| Jær Alt AS | Bryne | 2024 |
| Jærbarnehagen Fus AS | Bryne | 2018 |
| Jæren Trafikkskole AS | Nærbø | 2012 |
| Jæren Trafikkskole Nærbø Da | Nærbø | 1992 |
| Jæren Utleie AS | Varhaug | 2015 |
| Jörmungandr AS | Rælingen | 2023 |
| Jøraandstad Consulting AS | Oslo | 2013 |
| K Consulting Nuf | Heimdal | 2018 |
| K&R Paulsberg AS | Lillestrøm | 2025 |
| K-Marine AS | Nedenes | 2005 |
| K-Ram AS | Hobøl | 2020 |
| K. Berg AS | Ski | 1995 |
| K.A.Vole AS | Garmo | 2026 |
| K160UTR. AS | Spongdal | 2021 |
| K2 Hodne Larsen AS | Stavanger | 2008 |
| K2 Kompetanse AS | Tønsberg | 2018 |
| K2 Trafikkskole AS | Oslo | 2022 |
| K52 Gruppen AS | Rødøy | 2026 |
| Ka Production AS | Oslo | 2012 |
| Kaa AS | Oslo | 2007 |
| Kaan AS | Follebu | 2013 |
| Kaasen Holding AS | Gjettum | 2024 |
| Kaasenchess AS | Gjettum | 2024 |
| Kabelvåg Barnehage AS | Kabelvåg | 2011 |