| Kjetil Ringlund Holding AS | | 2017 |
| Kjetil Skaansar AS | Health & social care | 2018 |
| Kjos AS | Professional & scientific | 2007 |
| Kjølgård Transport AS | Transport & logistics | 2020 |
| KK Renhold AS | Administrative & support | 2023 |
| Klangstof AS | Information & communication | 2026 |
| Klart Svar AS | Information & communication | 2017 |
| Klashaugen Eiendom AS | Construction | 2002 |
| Klashaugen Entreprenør AS | Construction | 2017 |
| Klashaugen Holding AS | Construction | 2005 |
| Klatring Og Ski AS | | 2022 |
| Kleberkakken Holding AS | Financial services | 2005 |
| KLINIKK77 AS | Health & social care | 2016 |
| Knarrum Bostad AS | Real estate | 2012 |
| Knestang Holding AS | | 2026 |
| Knutrud AS | Information & communication | 2021 |
| Koan Lillehammer AS | Hospitality | 2005 |
| Kobani AS | Hospitality | 2024 |
| Kobbevik Helse AS | Health & social care | 2026 |
| Kodes AS | Information & communication | 2017 |
| Koko Lillehammer AS | Wholesale & retail | 2021 |
| Kolvik & Krogsveen AS | Professional & scientific | 2017 |
| Kompetanser AS | Education | 2013 |
| Kongle Elve AS | Financial services | 2003 |
| Kongsberg Business Center AS | Real estate | 2012 |
| Kontorleverandøren Lillehammer AS | Wholesale & retail | 1992 |
| Korgvegen 25 AS | Real estate | 2022 |
| Kroken Sauna AS | Administrative & support | 2020 |
| Krols AS | Real estate | 2012 |
| KSS AS | Education | 2014 |
| Kth-Service AS | Professional & scientific | 2022 |
| Kuben Kolonial AS | Wholesale & retail | 2021 |
| Kulturhjerte AS | Arts & recreation | 2018 |
| Kulturit AS | Information & communication | 2015 |
| Kulturuthuset AS | Manufacturing | 2020 |
| Kuri AS | Health & social care | 2020 |
| Kursiv Kompetanse AS | Education | 2025 |
| Kursleverandøren AS | Education | 2016 |
| Kutt Ut AS | Wholesale & retail | 2026 |
| Kvarstadpedersen AS | Education | 2023 |
| Kveda Rådgivning AS | Professional & scientific | 2009 |
| Kveile AS | Information & communication | 2026 |
| Kveitejegeren AS | Transport & logistics | 2017 |
| Kwat Eiendom AS | Real estate | 2019 |
| Kwat Holding AS | Wholesale & retail | 2019 |
| L. Moe Holding AS | | 2020 |
| L.H Holding AS | | 2020 |
| La Unica AS | Wholesale & retail | 2018 |
| Laagen Eiendom AS | Real estate | 1997 |
| Laave Invest AS | Financial services | 2017 |
| Landbruksmaling AS | Construction | 2016 |
| Langseth Utvikling AS | Real estate | 2014 |
| Lara Investment AS | Real estate | 2022 |
| Larkas AS | Professional & scientific | 1995 |
| Lars Bergseng AS | Financial services | 2005 |
| Lars Skjeggestad Invest AS | Real estate | 1997 |
| Larsen Bi Konsult AS | Professional & scientific | 2024 |
| Lawah Invest AS | | 2020 |
| Lbss Eiendom AS | Real estate | 2024 |
| Lecardio AS | Health & social care | 2007 |
| Lege Steinar Kuvås Grue AS | Health & social care | 2017 |
| Leif Klashaugen AS | Real estate | 2013 |
| Leila's Salong AS | Other services | 2019 |
| Leistad Fysioterapi Og Trening AS | Health & social care | 2021 |
| Lemmingvær AS | Real estate | 1998 |
| Lensmannsgaarden AS | Real estate | 2010 |
| LHM Bygg AS | Real estate | 2022 |
| LHM Gruppen AS | Real estate | 2017 |
| Lhmr Vest Invest AS | Real estate | 2016 |
| Li-Eiendom AS | Real estate | 2005 |
| Libertine AS | Wholesale & retail | 2009 |
| Lightcarrier AS | Information & communication | 2018 |
| Lill-Sport Norge AS | Wholesale & retail | 2009 |
| Lille Ark Ans | Professional & scientific | 1989 |
| Lille Bjørn AS | Arts & recreation | 2023 |
| Lille Dario AS | Other services | 2020 |
| Lille Epoke Arkitekter AS | Professional & scientific | 2024 |
| Lille H AS | Real estate | 2022 |
| Lille H Byrå AS | Professional & scientific | 2019 |
| Lille Meieri AS | Manufacturing | 2016 |
| Lille Pannekakehuset AS | Hospitality | 2014 |
| Lille-Invest AS | Real estate | 2022 |
| Lillehammer 2024 AS | Real estate | 2024 |
| Lillehammer Apotek AS | Wholesale & retail | 2021 |
| Lillehammer Autosenter AS | Wholesale & retail | 1988 |
| Lillehammer Bakeri AS | Manufacturing | 2021 |
| Lillehammer Ballettskole AS | Education | 2004 |
| Lillehammer Begravelsesbyrå AS | Other services | 1990 |
| Lillehammer Bilskadesenter AS | Other services | 1998 |
| Lillehammer Bilverksted AS | Other services | 2013 |
| Lillehammer Bryggeri AS | Manufacturing | 2005 |
| Lillehammer Brønnboring AS | Construction | 1998 |
| Lillehammer Byavis AS | Information & communication | 2025 |
| Lillehammer Byggelementer AS | Construction | 2021 |
| Lillehammer Byggservice AS | Administrative & support | 2015 |
| Lillehammer Caravanservice AS | Other services | 2012 |
| Lillehammer Catering AS | Hospitality | 2025 |
| Lillehammer Curlingarrangementer AS | Arts & recreation | 2020 |
| Lillehammer Data AS | Information & communication | 2017 |
| Lillehammer Data Og Foto AS | Information & communication | 2016 |