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| Hva Nå? AS | Lillestrøm | 2023 |
| Hveem Consulting AS | Risør | 1998 |
| Hverdag Og Hvile Da | Berger | 2021 |
| Hverdags Økonomi AS | Stavanger | 2020 |
| Hverdagsmoro AS | Heimdal | 2024 |
| Hvitsten Naturbarnehage SA | Hvitsten | 1979 |
| Hvitveisen Barnehage Ans | Oslo | 1994 |
| Hvitveisen Barnehage AS | Oslo | 2000 |
| Hvitveisen Barnehage SA | Hamar | 1989 |
| Hvíla AS | Fredrikstad | 2024 |
| Hydraulikkskola AS | Dagali | 2011 |
| Hydro Environmental Consultancy Ltd Nuf | Cw6 9Je Tarporley, Cheshire | 2026 |
| Hypatia AS | Kråkerøy | 1994 |
| Hyper-Aktiv AS | Greåker | 2006 |
| Hypnoseakademiet AS | Bjørndalstræ | 2022 |
| Hypopressiv Trening Norge AS | Oslo | 2020 |
| Hytek V/Amu-Nordjylland | Dk-9000 Aalborg | 2015 |
| Håbafjell Idrettsbarnehage SA | Sandnes | 1996 |
| Håbet Eiendom BHG AS | Sandnes | 1993 |
| Håbet Fus Friluftsbarnehage AS | Sandnes | 2018 |
| Håkonshella Fus Barnehage AS | Mathopen | 2018 |
| Hålandsmarkå Barnehage SA | Ræge | 2005 |
| Håndballmester AS | Oslo | 2026 |
| Håndplukk AS | Oslo | 2020 |
| Håndverkshagen AS | Lalm | 2024 |
| Håndverksutdanning AS | Torp | 2017 |
| Håsima AS | Leknes | 2007 |
| Høddvollbarnehagen SA | Ulsteinvik | 1992 |
| Høgda Familiebarnehage Ans | Rørvik | 1998 |
| Høgenhall Barnehage SA | Sandefjord | 1992 |
| Høgfjellsskolen AS | Lindesnes | 2016 |
| Høgh Trafikkskole AS | Oppegård | 2008 |
| Høglo Trafikkskole AS | Ski | 2026 |
| Høgni Kompetanse Arason | Hønefoss | 2013 |
| Høgskolesenteret I Kristiansund AS | Kristiansund N | 2007 |
| Høien Trafikkskole AS | Egersund | 1981 |
| Høietun Barnehage AS | Mosby | 2025 |
| Høiseth Holding AS | Meråker | 2005 |
| Hølen Fus Barnehage AS | Hølen | 2019 |
| Hønefoss Dykkersenter AS | Hønefoss | 2022 |
| Hør Meg AS | Halden | 2024 |
| Høvleriet Barnehage AS | Halden | 2012 |
| Høvåg Trafikkskole AS | Høvåg | 2016 |
| Høybråtentrafikkskole AS | Oslo | 2025 |
| Høydehuset AS | Drammen | 2005 |
| Høyfjellstur AS | Oslo | 2020 |
| Høygir AS | Kragerø Skjærgård | 2025 |
| Høyskolen for Dansekunst AS | Oslo | 2013 |
| Høyskolen for Ledelse Og Teologi AS | Stabekk | 2009 |
| Høyskolen for Yrkesfag AS | Gjøvik | 2015 |
| I Am - Integral Mentoring AS | Oslo | 2016 |
| I Am Lava AS | Bøstad | 2017 |
| I Bevegelse Da | Langhus | 2017 |
| I Fri Natur AS | Henningsvær | 2020 |
| I Trygge Hender AS | Åros | 2004 |
| I.E.E.Luther AS | Lommedalen | 2020 |
| I.Hæhre's Trafikkskole A/S | Vikersund | 1988 |
| I/O/Lab Rogalands Senter for Framtidskunst AS | Sola | 2006 |
| Iaa Coaching AS | Sandnes | 2022 |
| Ib Skoleutvikling AS | Sofiemyr | 2020 |
| Ibid SA | Tromsø | 2014 |
| Ibp AS | Sortland | 2011 |
| Icoach AS | Oslo | 2024 |
| Icodeit AS | Stavanger | 2023 |
| Ida Aalen AS | Oslo | 2017 |
| Ida Dahl Holding AS | Tønsberg | 2021 |
| Ida Eriksson Hardangen AS | Sofiemyr | 2023 |
| Ida Heggeland Yoga AS | Hagavik | 2021 |
| Idares AS | Oslo | 2021 |
| Idea Barnehage Kongsberg AS | Notodden | 2020 |
| Idea Barnehage Notodden AS | Notodden | 2022 |
| Idrettsakademiet AS | Oslo | 2020 |
| Idrettsbarna Svøm Og Foto AS | Billingstad | 2018 |
| Idrettskoncult AS | Sande I Vestfold | 2022 |
| Idrive AS | Harstad | 2013 |
| Idsi Invest AS | Alta | 2025 |
| Idsi Kompetanse AS | Alta | 2025 |
| Idun Fus Barnehage AS | Oslo | 2019 |
| Idèc (Idè Consulting) AS | Ålesund | 2012 |
| Ifjobb Utvikling AS | Leksvik | 2024 |
| Iflyt Coaching & Mindfulness AS | Kristiansand S | 2012 |
| Ifokus Holding AS | Larvik | 2017 |
| Ifokus Kompetanse AS | Larvik | 2015 |
| Ifra Ans | Oslo | 2004 |
| Ifront Karriere AS | Oslo | 1996 |
| Ifront Kompetanse AS | Oslo | 2020 |
| Ifus AS | Gjøvik | 2020 |
| Iførersete AS | Larvik | 2020 |
| Iglemyr Fus Barnehage AS | Sandnes | 2018 |
| Iglo Opplæring AS | Eidsnes | 1986 |
| Igm AS | Oslo | 2013 |
| Iharmoni Muskelterapi AS | Rossland | 2026 |
| Ihle Barnehage SA | Bøverbru | 1994 |
| Ikess Consulting AS | Lillestrøm | 2019 |
| Ikess Kurs AS | Oslo | 2020 |
| Ikigai Coaching & Recruiting AS | Bodø | 2021 |
| Ikornnes Fus Barnehage AS | Ikornnes | 2019 |
| Ikt-Huset AS | Oslo | 2014 |
| Ikt-Huset Holding AS | Oslo | 2014 |