| Blend Studio AS | Other services | 2023 |
| Blnk AS | Professional & scientific | 2025 |
| Blomsterhandler Ingrid Bendiksen AS | Wholesale & retail | 2001 |
| Blåklokkevegen Huseierlag II SA | Real estate | 1982 |
| Bo AS | Construction | 1968 |
| Boligpartner Lillehammer AS | Real estate | 2024 |
| Bondens Marked Innlandet SA | Wholesale & retail | 2006 |
| Bordet Holding AS | Hospitality | 2024 |
| Bortskjemta NR. 1 Holding AS | | 2024 |
| Bow Eiendom AS | Real estate | 2021 |
| Bra Eiendomsutvikling AS | Real estate | 2016 |
| Brakke 3 AS | Wholesale & retail | 2025 |
| Brand Vask & Renhold AS | Administrative & support | 2019 |
| Brannsikring Innlandet AS | Construction | 2025 |
| Brasa Amin AS | Hospitality | 2026 |
| Brawndo AS | | 2024 |
| Breisethvegen 3 AS | Real estate | 2023 |
| Brekken Holding AS | | 2019 |
| Brenden Eiendomsutvikling AS | Real estate | 2013 |
| Brillehjørnet Lillehammer AS | Wholesale & retail | 2008 |
| Brimhest AS | Arts & recreation | 2016 |
| Bringsfjellet Panorama AS | Real estate | 2022 |
| Brisans AS | Professional & scientific | 2016 |
| Broa Eiendom AS | Real estate | 2014 |
| Brubakken 2 AS | Real estate | 2013 |
| Brubakken Parkering AS | Transport & logistics | 2018 |
| Bruce Holding AS | | 2025 |
| Brumleheim Invest AS | | 2025 |
| Bryggeriet AS | Real estate | 2000 |
| Bryggeriet Legesenter Da | Health & social care | 2010 |
| Bryllupet AS | Information & communication | 2026 |
| Brødra Da | Administrative & support | 2026 |
| Brødra Media AS | Professional & scientific | 2024 |
| Brødrene Lunn AS | Transport & logistics | 1995 |
| Bullgruppen AS | | 2022 |
| Burt Invest AS | Real estate | 2018 |
| Busten AS | Financial services | 2006 |
| Butikkdrift Brodalen AS | Wholesale & retail | 2025 |
| Butikkdrift Nygård AS | Wholesale & retail | 2024 |
| Butikkdrift Skar AS | Wholesale & retail | 2025 |
| Bybonus Norge AS | Wholesale & retail | 2015 |
| Byen Tekstil AS | Wholesale & retail | 2003 |
| Bygg & Monteringsservice AS | Construction | 2015 |
| Bygg Øst AS | Construction | 1995 |
| Byggservice Lillehammer AS | Administrative & support | 2025 |
| Byggsikring Øst AS | Professional & scientific | 2026 |
| Bøhle Eiendomstjenester AS | Construction | 2018 |
| Bøhmergården AS | Real estate | 2021 |
| Børre Dokken Holding AS | Real estate | 2012 |
| Bøth Holding AS | Wholesale & retail | 2023 |
| Cactus Frisør Lillehammer AS | Other services | 2025 |
| Cafe Toscana AS | Hospitality | 2005 |
| Camillas Fotterapi AS | Health & social care | 2014 |
| Canor Eiendom AS | Real estate | 2022 |
| Care Camp Lillehammer AS | Information & communication | 2015 |
| Cathinkas Stue AS | Wholesale & retail | 1998 |
| Centrum Garn Lillehammer AS | Wholesale & retail | 2017 |
| Centrum Tannklinikk II AS | Health & social care | 2025 |
| CFR Invest AS | | 2021 |
| Chainz Limited AS | Wholesale & retail | 2023 |
| Channelflow AS | Information & communication | 2023 |
| CHD AS | Wholesale & retail | 2012 |
| Christiane AS | Real estate | 2020 |
| Chutko Holding AS | Real estate | 2019 |
| CJB Tech AS | Arts & recreation | 2013 |
| CL Eiendom AS | Real estate | 2014 |
| Clan AS | Wholesale & retail | 2017 |
| Cleanbed AS | Professional & scientific | 2004 |
| Cloudaccounting AS | Professional & scientific | 2020 |
| Co-Invest Property AS | Real estate | 2022 |
| Coinvest AS | | 2022 |
| Colibri Content AS | Professional & scientific | 2023 |
| Columbine AS | Real estate | 2006 |
| Concreti AS | Construction | 2022 |
| Consentum AS | Real estate | 2006 |
| Consulere AS | Information & communication | 2010 |
| Consulere Holding AS | Information & communication | 2008 |
| Create - Lillehammer Kreative Videregående Skole AS | Education | 2018 |
| Crossroad - Country Band Da | Arts & recreation | 2007 |
| Cryp Tax AS | Professional & scientific | 2018 |
| Cut Through the Noise AS | Professional & scientific | 2024 |
| Dahle Medical AS | Wholesale & retail | 2013 |
| Dahle Medical Holding AS | Wholesale & retail | 2013 |
| Dahlen Holding AS | | 2005 |
| Daisuki Sushi Lillehammer AS | | 2019 |
| Dala Møbler Sæther/Einstad Ans | Wholesale & retail | 1995 |
| Dalby Ans | Agriculture & fishing | 1997 |
| Dampsaga Drift AS | Hospitality | 2007 |
| Daniel Invest AS | Real estate | 2012 |
| Danseakademi AS | Education | 2026 |
| Dantann AS | Health & social care | 2019 |
| David Scott Holdings AS | Professional & scientific | 2017 |
| Dayhill Holding AS | Professional & scientific | 2024 |
| Delta Rights AS | Arts & recreation | 2020 |
| Den Norske Knappefabrik AS | Manufacturing | 1922 |
| Dentalis Holding AS | Financial services | 2020 |
| Dervo Naturkunnskap AS | Professional & scientific | 2025 |
| Det Norske Meieri AS | Manufacturing | 2020 |
| Dhb-Holding AS | Real estate | 2019 |
| Dialecta AS | Professional & scientific | 2003 |