| Knutstad & Holen Holding AS | Manufacturing | 2017 |
| Koan AS | Hospitality | 1998 |
| Kobolt Eiendom AS | Real estate | 2011 |
| Kobr AS | Professional & scientific | 2023 |
| Koe Holding AS | | 2023 |
| Kolltjernvegen 10 AS | Real estate | 2019 |
| Kolltjernvegen 12 AS | Real estate | 2021 |
| Kolybrand AS | Administrative & support | 1994 |
| Kompetent AS | Education | 2011 |
| Komv Invest AS | Financial services | 2015 |
| Kontorleverandøren Hamar AS | Wholesale & retail | 1992 |
| Kornsilovegen 2 AS | Real estate | 2019 |
| Kornsilovegen 60 Og 62 AS | Real estate | 2014 |
| Korup Holding AS | Real estate | 2011 |
| Kraftiutvikling AS | Professional & scientific | 2018 |
| Kras Eiendom AS | Real estate | 2009 |
| Kreare Hamar AS | Real estate | 2025 |
| Kreativ Interiør AS | Wholesale & retail | 1998 |
| Krem Holding AS | | 2017 |
| Kristian Gjøra Holding AS | | 2023 |
| Kristmart Invest AS | | 2019 |
| Kro Invest AS | | 2025 |
| Krognes Coaching AS | Education | 2023 |
| KRP Holding AS | | 2018 |
| KRP Invest AS | | 2023 |
| KRS Økonomi AS | Professional & scientific | 2016 |
| Krystallengelen AS | Wholesale & retail | 2021 |
| Kutt & Chriss AS | Other services | 2009 |
| Kvadraturen Hamar AS | Real estate | 2021 |
| Kårtorpvegen 18 AS | Real estate | 2023 |
| Køb Eiendom AS | Real estate | 2023 |
| Laidback Licence to Chill AS | Manufacturing | 2009 |
| Lakasa Eiendom AS | Real estate | 2025 |
| Lamal Invest AS | Real estate | 2019 |
| Langberget Law and Consulting AS | Professional & scientific | 2026 |
| Lango AS | Education | 2017 |
| Lars Hollosgate 1 AS | Real estate | 1977 |
| Lars Petter Johansen Invest AS | | 2019 |
| Late Holding AS | Real estate | 2015 |
| Laupstad Bygg AS | Construction | 2024 |
| Laupstad Holding AS | Construction | 2024 |
| LBAA208 AS | | 2022 |
| LBB Eiendom AS | Real estate | 2018 |
| LBS Hovslageri AS | Agriculture & fishing | 2024 |
| Lege Andreas Johannes Heck AS | Health & social care | 2025 |
| Lege Kjetil Gimse AS | Health & social care | 2019 |
| Lege Maria Skalleberg AS | Health & social care | 2020 |
| Legehuset Nova AS | Health & social care | 2021 |
| Leiebod AS | Real estate | 2020 |
| Lejo Holding AS | | 2012 |
| Lekehuset Hamar AS | Wholesale & retail | 2019 |
| Lekeland 1 Hamar AS | Arts & recreation | 2006 |
| Lekr AS | Health & social care | 2022 |
| Leksi Bil AS | Wholesale & retail | 2024 |
| Lenatunet Bo Godt AS | Real estate | 2025 |
| Lerkendal Invest AS | Real estate | 2011 |
| Lerkendal Kontor Og Parkering AS | Real estate | 2012 |
| Levy Holding AS | | 2025 |
| LGS Invest AS | Financial services | 2013 |
| Libro AS | | 2021 |
| Lie VVS AS | Construction | 2015 |
| Lifland Agri AS | Manufacturing | 2021 |
| Lifland Holding AS | | 2025 |
| Lighthill Invest AS | | 2022 |
| Like Being There AS | Manufacturing | 2015 |
| Liljen Blomster AS | Wholesale & retail | 2021 |
| Lille Lone AS | Wholesale & retail | 2014 |
| Lille Strandgt 3 AS | Real estate | 2005 |
| Lillen AS | Wholesale & retail | 2014 |
| Lima Gruppen AS | Real estate | 1997 |
| Limhus AS | | 2024 |
| Lindahlplan Invest AS | Real estate | 1998 |
| Lindbergbakken 3 AS | Real estate | 2020 |
| Lindehus AS | Professional & scientific | 2024 |
| Lindman Arkitektkontor AS | Professional & scientific | 2000 |
| Lindmark Frisørene AS | Other services | 2022 |
| Linduken AS | Wholesale & retail | 2014 |
| Lito Investment AS | | 2019 |
| Livemusic AS | Arts & recreation | 2012 |
| Livgard Invest AS | Real estate | 2020 |
| Ljossatt AS | Wholesale & retail | 2019 |
| Llnc AS | Professional & scientific | 2021 |
| Lokal Revisjon AS | Professional & scientific | 2000 |
| Lombnæs Ans | Agriculture & fishing | 2004 |
| Longclaw Invest AS | Professional & scientific | 2015 |
| Losjehuset Ajertun AS | Real estate | 2010 |
| Lotteries Entertainment Innovation Alliance AS | Information & communication | 2018 |
| LP Restaurantdrift AS | Hospitality | 2019 |
| LPV3 AS | | 2021 |
| LR Invest AS | | 2020 |
| Lucky Thaimassasje AS | Other services | 2022 |
| Lumino AS | Information & communication | 2005 |
| Lund Dobloug Holding AS | | 2025 |
| Lunde & Graaberget Maskinformidling Ans | Administrative & support | 1999 |
| Lundgutua Eiendom AS | Real estate | 2017 |
| Lunds Økonomiservice AS | Professional & scientific | 1989 |
| Lutefiskfestivalen AS | Arts & recreation | 2013 |
| Lux Fide AS | Professional & scientific | 2019 |
| Lønnberget Utvikling AS | Real estate | 2020 |
| Løve AS | Real estate | 1987 |