| Bølstad Invest AS | Real estate | 1997 |
| Bølum Invest AS | | 2019 |
| Bøndenes Hus AS | Real estate | 1988 |
| Bønder I Byen AS | Wholesale & retail | 2016 |
| Bønes Virik AS | Professional & scientific | 2006 |
| Bønna Holding AS | | 2026 |
| Bør & Nor AS | Wholesale & retail | 1998 |
| Børe AS | | 2025 |
| Børgin AS | | 2018 |
| Børje Karlsson AS | Professional & scientific | 2013 |
| Børn Productions AS | Arts & recreation | 2013 |
| Børnich AS | Manufacturing | 2026 |
| Børre Hegbom AS | Professional & scientific | 2017 |
| Børre Jensen Holding AS | Real estate | 2005 |
| Børre Mølstad Holding AS | | 2020 |
| Børre Sæthre AS | Arts & recreation | 2007 |
| Børs Lind Invest AS | Financial services | 2005 |
| Børs Og Katedral AS | | 2022 |
| Børsa AS | Wholesale & retail | 2012 |
| Børserudvegen Utvikling AS | Real estate | 2019 |
| Børseth-Hansen AS | Real estate | 2005 |
| Børsjø Invest AS | Financial services | 2017 |
| Børsruletten AS | | 2023 |
| Børst Først AS | Hospitality | 2022 |
| Børstad Holding AS | | 2023 |
| Børstad Invest AS | | 2019 |
| Børte Holding AS | | 2017 |
| Bøssa AS | | 2024 |
| Bøtta Holding AS | | 2024 |
| Bøtta Invest Da | Real estate | 2008 |
| Bøtteballetten AS | Administrative & support | 2023 |
| Bøtteknøtt AS | | 2020 |
| Bøttger Eiendom AS | Real estate | 2020 |
| Bøttger Holding AS | Construction | 2007 |
| Bøyer Holding AS | Wholesale & retail | 2022 |
| Büchner Holdings AS | | 2022 |
| Bühler AG, Schweiz Filial Nuf | Wholesale & retail | 2012 |
| C & B Invest AS | | 2024 |
| C & I Utvikling AS | Professional & scientific | 2025 |
| C & K Tradeunion Da | | 1988 |
| C & S Cable AS | Wholesale & retail | 2018 |
| C + C Frode Records Ans | Wholesale & retail | 1996 |
| C - by - C AS | Real estate | 2005 |
| C 11 Holding AS | Financial services | 2005 |
| C a Johansson Snekkerifabrikk AS | Manufacturing | 2024 |
| C Anderssen Invest AS | | 2024 |
| C Berge Holding AS | | 2019 |
| C E Eiendom AS | | 2016 |
| C F Eriksen Ans | Professional & scientific | 1986 |
| C Hemsen AS | Wholesale & retail | 1919 |
| C Hua Holding AS | | 2019 |
| C Kroken Holding AS | | 2024 |
| C M Mathiesen & Co AS | Construction | 1991 |
| C M Mathiesen Teknikk AS | Wholesale & retail | 1992 |
| C M Skaurum AS | Real estate | 1999 |
| C Media Holding AS | Professional & scientific | 2009 |
| C O Lunds Gate 26 AS | Real estate | 2021 |
| C Og M AS | Hospitality | 2013 |
| C Perspective AS | Education | 2024 |
| C Pizza AS | Hospitality | 2026 |
| C Prosjekt AS | Construction | 2017 |
| C Spesialist AS | Health & social care | 2017 |
| C Stene Eiendom AS | Real estate | 2025 |
| C Sundtsgt 19 AS | Real estate | 1942 |
| C Tennant Sons & Co AS | | 2018 |
| C Worldwide Asset Management AS | Financial services | 1987 |
| C&B Consulting AS | Professional & scientific | 2026 |
| C&C Capital AS | Professional & scientific | 2014 |
| C&C Investment AS | | 2025 |
| C&G Invest AS | Financial services | 2005 |
| C&J Entertainment AS | Arts & recreation | 2023 |
| C&J Studio AS | Professional & scientific | 2010 |
| C&L Holding AS | Real estate | 2011 |
| C&M Aesthetics AS | Other services | 2022 |
| C&P Debrito AS | Wholesale & retail | 2012 |
| C&T Holding AS | Information & communication | 2012 |
| C&W Invest AS | | 2024 |
| C- Ideal Service AS | Professional & scientific | 2026 |
| C-E Holding AS | Professional & scientific | 2022 |
| C-E.Studio AS | Real estate | 2022 |
| C-Holding AS | Construction | 1989 |
| C-Home Invest AS | | 2020 |
| C-Safe AS | Wholesale & retail | 2012 |
| C-Works AS | Manufacturing | 2013 |
| C. Andersen Holding AS | | 2025 |
| C. Hansen Invest AS | | 2021 |
| C. Haugen Holding AS | Professional & scientific | 2025 |
| C. Midthaug AS | | 2023 |
| C. Nielsen Eiendom AS | | 2018 |
| C. Sundts Gate 18 AS | Real estate | 2018 |
| C. Sundts Gate 29 AS | Real estate | 2007 |
| C.Alderin Invest AS | | 2023 |
| C.Andres Holding AS | | 2026 |
| C.C.H & Bar AS | Hospitality | 2018 |
| C.Dehlimarken AS | | 2023 |
| C.F. Møller Norge AS | Professional & scientific | 2003 |
| C.H. Rugg & Co Nuf | Administrative & support | 2026 |
| C.H.S Holding AS | | 2024 |
| C.Helling Eiendom Og Tømrertjenester AS | Construction | 2020 |
| C.J. Hansens Vei 16-18 AS | Real estate | 2010 |