| Blikkenslager Selvåg & Hagen AS | Construction | 2016 |
| Blink Pizza & Grill AS | Hospitality | 2024 |
| Blomkvist Holding AS | Financial services | 2016 |
| Blomstertorget AS | Wholesale & retail | 1991 |
| Blåhammeren Skogsveiforening Ba | Real estate | 2005 |
| Bmtk AS | Construction | 2016 |
| Boform Agenturer AS | Wholesale & retail | 2003 |
| Boguslaw Olszewski P.P.H.U Bodex | Construction | 2015 |
| BOLIGBYGGER1 AS | Construction | 2015 |
| Bowlinghallen.No AS | Arts & recreation | 2013 |
| Boxwall AS | Construction | 2021 |
| Boxwall Holding AS | Construction | 2021 |
| BR. Vollan AS | Construction | 2010 |
| Brage Sport AS | Wholesale & retail | 2003 |
| Braillo Norway AS | Manufacturing | 1980 |
| Brandas AS | Real estate | 2021 |
| Brandpool AS | Wholesale & retail | 2020 |
| Bravo Eiendomsutvikling AS | Real estate | 2003 |
| BRB Holding AS | | 2022 |
| Breiseth Eiendom AS | Real estate | 1999 |
| Breivegen 267 AS | Real estate | 2021 |
| Brekka Invest AS | Real estate | 2013 |
| Bremseth Bad AS | Construction | 2021 |
| Bremseth Regnskap Og Bærekraft AS | Professional & scientific | 2022 |
| Brenne Holding AS | Wholesale & retail | 2005 |
| Briis Coaching AS | Education | 2026 |
| Briis Holding AS | | 2025 |
| Briis Stjørdal AS | Arts & recreation | 2025 |
| Brit's Undertøysalong AS | Wholesale & retail | 2005 |
| Brita Holding AS | Other services | 2015 |
| Brothers&Sisters AS | Other services | 2014 |
| Brynhild Forbord Holding AS | Wholesale & retail | 2013 |
| Brødr Halle AS | Construction | 1977 |
| Brødr. Halle Verkstedbygg AS | Real estate | 2006 |
| Brødrene Bjerkli AS | Construction | 1984 |
| Brødrene Hofstad AS | Construction | 2001 |
| Brødrene Hofstad Holding AS | Real estate | 2019 |
| Brøsetekra 5 AS | Real estate | 2024 |
| BS Pub & Kultur AS | Hospitality | 2012 |
| Buldrikagga Holding AS | | 2021 |
| Butikkdrift Mæhre AS | Wholesale & retail | 2020 |
| Buvegen SA | Real estate | 2020 |
| Bvi Holding 2 AS | | 2025 |
| Bvi Holding AS | Financial services | 2014 |
| By Eiendom AS | Real estate | 1997 |
| Bydryss AS | Wholesale & retail | 2017 |
| Bygg Og Gulvteknikk AS | Construction | 2013 |
| Byggmann Stjørdal Meråker AS | Construction | 2023 |
| Byggmester Arne Skotnes AS | Construction | 2020 |
| Byggservicejan AS | Construction | 2020 |
| Byporten Stjørdal AS | Real estate | 2016 |
| Byte Gaming AS | Administrative & support | 2023 |
| Børstad 1942 AS | Transport & logistics | 2016 |
| Børstad AS | Transport & logistics | 1981 |
| Børstads Eiendom AS | Real estate | 1987 |
| Cab Technology and Communication Trøndelag Da | Other services | 2003 |
| Caliverse AS | Information & communication | 2026 |
| Captn AS | | 2020 |
| Cauca AS | | 2022 |
| Cavator AS | Administrative & support | 2019 |
| CBS Holding AS | Financial services | 2009 |
| Centrum Eiendom Ans | Real estate | 2003 |
| CIC Operations Trondheim Airport AS | Hospitality | 2020 |
| Cliffhanger AS | Construction | 2020 |
| Climasmart AS | Professional & scientific | 2022 |
| Cognivantis AS | Information & communication | 2026 |
| Comet Lab AS | Information & communication | 2013 |
| Continental Consult AS | Professional & scientific | 2022 |
| Corda Holding AS | | 2013 |
| Crewly AS | Information & communication | 2026 |
| Cybiz AS | | 2020 |
| Daba AS | Wholesale & retail | 2016 |
| Dabu AS | | 2023 |
| Dahl Sjakk AS | Education | 2024 |
| Dahling Holding 1 AS | | 2021 |
| Dahling Holding 2 AS | | 2021 |
| Dahling Holding 3 AS | | 2021 |
| Dakota Eiendom AS | Real estate | 2025 |
| Dakota Holding AS | | 2014 |
| Dangerous Goods Management Midt AS | Education | 2006 |
| De Lege Lata AS | Professional & scientific | 2025 |
| Debido AS | Information & communication | 2021 |
| Dedicare AS | Administrative & support | 2000 |
| Dedicare Doctor AS | Administrative & support | 2001 |
| Dedicare Management AS | Administrative & support | 2020 |
| Dedicare Omsorg AS | Health & social care | 2025 |
| Dekos AS | | 2025 |
| Delia Iorga AS | Professional & scientific | 2025 |
| Dermatouch Aesthetics AS | Health & social care | 2022 |
| Det Lille Under Ans | Wholesale & retail | 1990 |
| Digital Marine AS | Professional & scientific | 2017 |
| Digital-T AS | Information & communication | 2018 |
| Dilemen Restaurant AS | Hospitality | 2024 |
| Din Regnskapslos AS | Professional & scientific | 2017 |
| Dise AS | Professional & scientific | 2019 |
| Ditt Apotek Hell AS | Wholesale & retail | 2014 |
| DR. Angelina Rimehaug AS | Health & social care | 2024 |
| Dravia AS | Wholesale & retail | 2017 |
| Driv Energi Midt-Norge AS | Wholesale & retail | 2011 |
| Drogset Holding AS | | 2025 |