| Kringen Services AS | Wholesale & retail | 2025 |
| Kristoffer Kjos AS | Transport & logistics | 1998 |
| Krogness & Flander AS | Education | 2009 |
| Krokens Rep Og Service Da | Manufacturing | 2024 |
| Krokenveien AS | Real estate | 2021 |
| Krokvik & Brenden Ans | Real estate | 2005 |
| Krone Frukt AS | Wholesale & retail | 2015 |
| KS & Ik Prosjekt Da | Professional & scientific | 1995 |
| Kultursentrum AS | Real estate | 2005 |
| KV 2 Eiendom AS | Real estate | 1997 |
| Kvernberggata 5 AS | Real estate | 2005 |
| Kvernstuen Bil AS | Wholesale & retail | 2025 |
| Kvikkeline Helsekost Hønefoss AS | Wholesale & retail | 2001 |
| Kw-Capital AS | | 2019 |
| Kyrksæterøra Handelseiendom AS | Real estate | 2006 |
| L16 Seksjon 13 AS | Real estate | 2025 |
| L16 Seksjon 2 AS | Real estate | 2025 |
| La Bella Vita Travel AS | Administrative & support | 2017 |
| La Oss Bygge AS | Construction | 2022 |
| Labelle Dama AS | Wholesale & retail | 2002 |
| Lady & Landstrykern AS | Wholesale & retail | 1997 |
| Lafton Bolig AS | Construction | 2014 |
| Lafton Eiendom AS | Real estate | 1979 |
| Lager Nord Eiendom AS | Real estate | 2011 |
| Lajo Transport AS | Transport & logistics | 2022 |
| Lakksenteret Hønefoss AS | Other services | 2005 |
| Lame Shame AS | | 2026 |
| Lamnao Spa AS | Other services | 2017 |
| Land Holding AS | Wholesale & retail | 2005 |
| Landbruk Og Hammer AS | Agriculture & fishing | 2023 |
| Langmyrveien Butikkeiendom AS | Real estate | 2004 |
| Langslet Magnussen Invest AS | Real estate | 2013 |
| Langweg Bedriftsrådgivning AS | Financial services | 1999 |
| Larsløkka AS | | 2021 |
| Lave Eiendom AS | Real estate | 2013 |
| Le Monde Care AS | Health & social care | 2021 |
| Leafhill Holding AS | | 2022 |
| Legene Svensbråten Og Langdalen AS | Health & social care | 1995 |
| Leif Ivar Malerservice AS | Construction | 2018 |
| Leira Butikkeiendom AS | Real estate | 2015 |
| Leisol AS | Wholesale & retail | 2026 |
| Leiv Vidar AS | Manufacturing | 2005 |
| Leivar AS | Professional & scientific | 2022 |
| Leknes Holding AS | Financial services | 2005 |
| Lene G Holding AS | Real estate | 2019 |
| Lesjø Utvikling AS | Professional & scientific | 2017 |
| Let AS | Real estate | 2020 |
| Lets Build AS | Construction | 2019 |
| Lettrådd AS | Wholesale & retail | 2021 |
| Lex Eiendom AS | Real estate | 1995 |
| Lexio AS | Professional & scientific | 2025 |
| Lexow Agent AS | Wholesale & retail | 1989 |
| Lhbh Invest AS | Wholesale & retail | 2015 |
| Liber Energy AS | Professional & scientific | 2022 |
| Lier Hageby Eiendomsselskap AS | Real estate | 2017 |
| Lietpak Norge AS | Wholesale & retail | 2022 |
| Lifra Import Lise Og Frank Lium Ans | | 1989 |
| Lillehammer Handelseiendom Syd AS | Real estate | 2011 |
| Limtre Holding AS | | 1996 |
| Lindstadhagens Mureservice AS | Construction | 2000 |
| Lindstrand Drift AS | | 2008 |
| Liodden Media AS | Information & communication | 2026 |
| Lirit AS | | 2022 |
| Litt Ditt Invest AS | Construction | 2022 |
| Livepartner AS | Professional & scientific | 2022 |
| Livet Invest AS | | 2025 |
| Livi Ext AS | Real estate | 2022 |
| Livskraften AS | Real estate | 2025 |
| LKB AS | Construction | 2023 |
| Lloyds Hønefoss AS | Real estate | 1974 |
| Lloyds Pub Hønefoss AS | Hospitality | 2025 |
| LMW Holding AS | | 2023 |
| Loe Gård AS | Agriculture & fishing | 2018 |
| Loe VVS Prosjekt AS | Professional & scientific | 2019 |
| Loeshagen AS | Real estate | 2018 |
| Loeskollen Utvikling AS | Real estate | 2010 |
| Lokal-Lift AS | Administrative & support | 2011 |
| Loks Drift AS | Administrative & support | 2024 |
| Longyear United AS | Arts & recreation | 2018 |
| Lopes AS | Wholesale & retail | 2022 |
| LR Health & Beauty Systems AS | Wholesale & retail | 1995 |
| LS Bil AS | Wholesale & retail | 2018 |
| Luckybilly AS | Professional & scientific | 2019 |
| Lufta AS | Construction | 2025 |
| Lumbra AS | Wholesale & retail | 2026 |
| Lundesgaard Holding AS | Financial services | 2017 |
| Lurebjørn Holding AS | Real estate | 2021 |
| Lykkesmedene AS | Manufacturing | 2018 |
| Lyngdal Handelsbygg AS | Real estate | 2011 |
| Lyngstadia AS | Real estate | 2026 |
| Lynvik Invest AS | | 2025 |
| Lys Og Kraft Eiendom AS | Real estate | 2001 |
| Lys Og Kraft Installasjon AS | Construction | 2001 |
| LZ Invest AS | Manufacturing | 2025 |
| Lz-Customs AS | Manufacturing | 2025 |
| Lås Og Kontrollservice AS | Professional & scientific | 2020 |
| Løkka Trading AS | Other services | 2013 |
| Løvenskiold Vei Og Plan AS | Professional & scientific | 2020 |
| Løvlia AS | Hospitality | 2024 |
| M - Eiendom AS | Real estate | 2023 |