| Lagårdsveien 6 AS | Real estate | 2020 |
| Lagårdsveien 78-80 AS | Real estate | 2014 |
| Lagårdsveien 78-80 Holding AS | Real estate | 2014 |
| Lahaugmoen AS | Real estate | 2007 |
| Lahaugmoen Holding AS | Real estate | 2006 |
| Lahaugmoen Infrastruktur AS | Real estate | 2008 |
| Lahaugmoen Innkvartering AS | Hospitality | 2014 |
| Lahaugmoen Logistikk AS | Real estate | 2015 |
| Lahellegrunnen AS | Real estate | 1997 |
| Lahnslaget AS | Real estate | 2005 |
| Laho AS | Health & social care | 2005 |
| Lahori Kitchen AS | Hospitality | 2022 |
| Lahori Kjøkken AS | Hospitality | 2026 |
| Lai Zai AS | Hospitality | 2025 |
| Laiderz Consultants AS | Real estate | 2025 |
| Laika Invest AS | Financial services | 2005 |
| Laila Hafstad Og Anne Aasheim Puls Ans | Health & social care | 2000 |
| Laila Robe AS | | 2023 |
| Laiout AS | Information & communication | 2021 |
| Laiptu Fabrikas Uab Nuf | Construction | 2010 |
| Laissez-Faire Music AS | Arts & recreation | 2020 |
| Lajjo Eiendom AS | Financial services | 2005 |
| Lajjo Eiendom III AS | | 2024 |
| Lak Invest AS | Financial services | 2012 |
| Laka AS | | 2019 |
| Lake Tahoe Holding AS | Professional & scientific | 2021 |
| Lakeside AS | Professional & scientific | 2002 |
| Lakewood Invest AS | Financial services | 2017 |
| Laki AS | Professional & scientific | 2016 |
| Lakkegata 64 Holding AS | Real estate | 2025 |
| Lakkegata Eiendom AS | Real estate | 2021 |
| Lakkegata Invest AS | Financial services | 2017 |
| Lakrids by Johan Bülow Norge AS | Wholesale & retail | 2014 |
| Lakring Invest AS | Real estate | 2018 |
| Lakselv Eiendomsutvikling AS | Real estate | 2007 |
| Lakselv Handelseiendom AS | Real estate | 2019 |
| Lakserenna AS | | 2024 |
| Laksevågneset 18 AS | Real estate | 2023 |
| Lakshmi AS | | 2020 |
| Laksøya-Hvittingfoss AS | Real estate | 2022 |
| Lala Tøyen AS | Professional & scientific | 2009 |
| Laland Resort AS | Professional & scientific | 2023 |
| Laley AS | Wholesale & retail | 2025 |
| Lalinder Holding AS | | 2023 |
| Lalindi AS | Administrative & support | 2024 |
| Lallakroken 8 AS | Households | 1931 |
| Lalola AS | | 2023 |
| Lalu Invest AS | | 2025 |
| Lama AS | Wholesale & retail | 2002 |
| Lama Design AS | Professional & scientific | 2019 |
| Lama Global AS | | 2022 |
| Lama Venture AS | | 2020 |
| Lamapoy Holding AS | | 2021 |
| Lamarc Wines AS | Wholesale & retail | 2015 |
| Lamariposa AS | Real estate | 2000 |
| Lambda Networks AS | Information & communication | 2010 |
| Lambech Regnskap AS | Professional & scientific | 2000 |
| Lambert Holding AS | | 2023 |
| Lambert Trafikkskole AS | Education | 2018 |
| Lamberts Mat AS | Hospitality | 2026 |
| Lambertsen AS | Construction | 2026 |
| Lambertsen Holding AS | | 2024 |
| Lambertsen Norway Holding AS | Construction | 2025 |
| Lambertseter Bilpleie AS | Other services | 2022 |
| Lambertseter Bilsalg AS | Wholesale & retail | 2016 |
| Lambertseter Bilshine & Dekksenter AS | Other services | 2014 |
| Lambertseter Bilverksted AS | Other services | 2016 |
| Lambertseter Boligutvikling AS | Real estate | 2016 |
| Lambertseter Butikkeiendom AS | Real estate | 2007 |
| Lambertseter Fysioterapi AS | Health & social care | 2020 |
| Lambertseter Kiropraktorsenter AS | Health & social care | 2020 |
| Lambertseter Legesenter AS | Health & social care | 2015 |
| Lambertseter Leker AS | Wholesale & retail | 2015 |
| Lambertseter Specsavers AS | Wholesale & retail | 2018 |
| Lambertseter Svømmehall AS | Arts & recreation | 2004 |
| Lambertseter Svømmehall Prosjekt AS | Professional & scientific | 2019 |
| Lambertseter Tannhelse AS | Health & social care | 2020 |
| Lambertseter Tannlegesenter AS | Health & social care | 2019 |
| Lambertseter Ur & Optikk AS | Wholesale & retail | 2016 |
| Lambertseter Ur Og Gull AS | Wholesale & retail | 2010 |
| Lambertseterveien 7 AS | Real estate | 2023 |
| Lamca AS | | 2023 |
| Lamda Invest AS | Financial services | 2005 |
| Lameau Holding AS | | 2022 |
| Lamholmane AS | | 2023 |
| Lamholmen AS | Real estate | 2016 |
| Lamholmen Invest AS | Real estate | 2006 |
| Laminar Eiendom AS | Real estate | 2023 |
| Lamini Invest AS | Real estate | 2013 |
| Laminor Holding AS | | 2024 |
| Lamlu Invest AS | Real estate | 2016 |
| Lamove Da | Education | 2017 |
| Lampad AS | Professional & scientific | 2021 |
| Lampeland Butikkeiendom AS | Real estate | 2017 |
| Lampeland Butikkeiendom Holding AS | Real estate | 2018 |
| Lampeland Invest AS | Real estate | 2005 |
| Lampemagasinet AS | Wholesale & retail | 1987 |
| Lamponi Investments AS | | 2005 |
| Lan AI Labs AS | Information & communication | 2026 |
| Lan Nails AS | Other services | 2024 |