| Kneet AS | Information & communication | 2021 |
| Kneika AS | Real estate | 2021 |
| Kneippbrødfabriken AS | Wholesale & retail | 1996 |
| Knekk Og Kna Kapital AS | Health & social care | 2025 |
| Knekt AS | Construction | 2025 |
| Knekt Data Norge AS | Wholesale & retail | 2015 |
| Knektfolk Prosjekter AS | Professional & scientific | 2007 |
| Knektkreativ AS | Information & communication | 2025 |
| Knem AS | Real estate | 2022 |
| Knem Holding AS | Real estate | 2005 |
| Knem Og Næsvik AS | Construction | 2000 |
| Knem Og Næsvik Eiendom AS | Real estate | 2008 |
| Knepperud Holding AS | | 2019 |
| Knesheim Holding AS | | 2019 |
| Kneveldoktor Invest AS | | 2024 |
| Kni India AS | Financial services | 2021 |
| Knif AS | Professional & scientific | 1995 |
| Knif Fundraising AS | Administrative & support | 2021 |
| Knif Innkjøp AS | Professional & scientific | 2021 |
| Knif Media AS | Information & communication | 2021 |
| Knif Trygghet Forsikring AS | Financial services | 2007 |
| Knightfield AS | Real estate | 1996 |
| Knightfield Holding AS | Wholesale & retail | 2005 |
| Knightstreet Management AS | Real estate | 2024 |
| Kniksens Plass 1-3 AS | Real estate | 2022 |
| Kniple Gård AS | Real estate | 2023 |
| Knippa AS | | 2019 |
| Knipzit Books AS | Wholesale & retail | 2025 |
| Knirckefritt Management & Produksjon AS | Professional & scientific | 2010 |
| Knirkefritt & Sønn AS | Information & communication | 2024 |
| Knirkefritt AS | Information & communication | 2018 |
| Knish Technologies AS | Information & communication | 2021 |
| Knit 1 AS | Manufacturing | 2021 |
| Knit AS | Information & communication | 2021 |
| Kniv Og Kjærlighet AS | Professional & scientific | 2012 |
| Kniveutsikten AS | Real estate | 2017 |
| Kniveutsikten Holding AS | Real estate | 2019 |
| KNM AS | Real estate | 2005 |
| Knockout Invest AS | | 2020 |
| Knoph AS | Financial services | 2011 |
| Knopp AS | | 2026 |
| Knorborg AS | | 2025 |
| Know How Konsult AS | Professional & scientific | 2017 |
| Know Nation AS | Information & communication | 2023 |
| Knowio AS | Information & communication | 2025 |
| Knowit AS | Information & communication | 2011 |
| Knowit Cybersecurity & Law AS | Information & communication | 2014 |
| Knowit Experience AI & Analytics AS | Professional & scientific | 2021 |
| Knowit Experience AS | Professional & scientific | 2016 |
| Knowit Experience Oslo AS | Information & communication | 2014 |
| Knowit Impact AS | Information & communication | 2020 |
| Knowit Insight AS | Professional & scientific | 2017 |
| Knowit Insight Business Solution AS | Information & communication | 2022 |
| Knowit Solutions Consulting AS | Information & communication | 1987 |
| Knowit Solutions Data & Tech AS | Information & communication | 1999 |
| Knowit Solutions Norway AS | Professional & scientific | 2015 |
| Knowledge Base AS | Information & communication | 2017 |
| Knowledge Management Company AS | Professional & scientific | 2004 |
| Knowledge Networks AS | Information & communication | 2018 |
| Knowledge Technology AS | Information & communication | 2026 |
| Knowledge Technology Holding AS | | 2026 |
| Knowledgebase AS | Administrative & support | 2019 |
| Knowledgegroup AS | Education | 1998 |
| Knowledgepack AS | Information & communication | 2019 |
| Knowlex AS | Information & communication | 1986 |
| Knox AS | Manufacturing | 2019 |
| Knta Holding AS | Professional & scientific | 2018 |
| Knubra AS | | 2019 |
| Knud Bryns Vei 1 AS | Real estate | 2016 |
| Knud Bryns Vei 3 AS | Real estate | 2014 |
| Knudsen & Knudsen AS | Professional & scientific | 2023 |
| Knudsenkvartalet AS | Real estate | 2018 |
| Knudsens Fotosenter AS | Professional & scientific | 1982 |
| Knudssøn Invest AS | Construction | 2005 |
| Knug Audio Ans | Information & communication | 2018 |
| Knusktørr AS | Real estate | 2020 |
| Knust Event AS | Administrative & support | 2023 |
| Knust Porselen AS | Wholesale & retail | 2018 |
| Knut & Kjartan AS | Professional & scientific | 2020 |
| Knut Arne Kvitting Invest AS | Real estate | 2021 |
| Knut Blomstrøm Contemporary AS | Wholesale & retail | 2020 |
| Knut Bryns Vei 1 Holding AS | Real estate | 2026 |
| Knut Bryns Vei 1 Tomteselskap AS | | 2026 |
| Knut Bryns Vei 3 Holding AS | Real estate | 2026 |
| Knut Bryns Vei 3 Tomteselskap AS | | 2026 |
| Knut Bryns Vei 5 Holding AS | Real estate | 2026 |
| Knut Bryns Vei 5 Tomteselskap AS | | 2026 |
| Knut Bryns Vei Utvikling AS | Real estate | 2017 |
| Knut Ekeberg AS | Real estate | 1963 |
| Knut Er Ut AS | | 2021 |
| Knut Erik Production AS | Education | 2005 |
| Knut Hamsundsvei Bodø AS | Real estate | 2006 |
| Knut Hesla Holding AS | | 2025 |
| Knut Hjeltnes Sivilarkitekter Mnal AS | Professional & scientific | 1998 |
| Knut J Bø Eiendom AS | Wholesale & retail | 2011 |
| Knut J. Bø Holding AS | Wholesale & retail | 2010 |
| Knut Lie AS | Construction | 1971 |
| Knut M Ore Aksjeselskap | Wholesale & retail | 1977 |
| Knut Morseth AS | | 2020 |
| Knut Nymoen Invest AS | | 2021 |