| Aroma Pizza Ltd | Hospitality | 2025 |
| Aroma Viva Ltd | Education | 2025 |
| Arora Landlord Services Ltd | Real estate | 2026 |
| Aruga Ltd | Professional & scientific | 2017 |
| ASC Build Ltd | Construction | 2013 |
| Ascendent Holdings Limited | Financial services | 2002 |
| Asdf Property Limited | Professional & scientific | 2010 |
| Asgard Industries Ltd | Transport & logistics | 2019 |
| ASH Garage Limited | Manufacturing | 2012 |
| ASH Letting Ltd | Real estate | 2017 |
| Ashburton Stores Ltd | Wholesale & retail | 2019 |
| Ashley Mallaburn Plumbing & Heating Services Ltd | Construction | 2016 |
| ASP Installations Ltd | Construction | 2022 |
| Aspire Architectural Services (North East) Ltd | Professional & scientific | 2016 |
| Aspiring Dreams CIC | Education | 2022 |
| Asset Access Ltd | Construction | 2016 |
| ATK Plus Property Ltd | Real estate | 2026 |
| Atlantic Vision Consultancy Limited | Real estate | 2020 |
| Atrax Studios Ltd | Information & communication | 2026 |
| ATS Aviation Limited | Manufacturing | 2015 |
| ATS Property Services Limited | Real estate | 2015 |
| Attic Conversions NE Ltd | Construction | 2025 |
| ATV Civils Ltd | Construction | 2024 |
| Autavia Commercial Management Limited | Administrative & support | 2016 |
| Auto Warranty Limited | Financial services | 1978 |
| Autograph Chauffeurs NE Ltd | Transport & logistics | 2018 |
| Autopipe Equipment Limited | Manufacturing | 2016 |
| AUX Buttes Chaumont Limited | Information & communication | 2020 |
| Awesome Niche Ltd | Wholesale & retail | 2025 |
| Awhv Ltd | Construction | 2022 |
| Ayaz Property Management Limited | Real estate | 2024 |
| AYO Homes Ltd | Real estate | 2024 |
| AZ Self Storage Ltd | Transport & logistics | 2014 |
| A’4 Cleaning Services Ltd | Administrative & support | 2025 |
| B & K Property Holdings Limited | Financial services | 2023 |
| B a Electrical Contractors Northern Limited | Manufacturing | 2013 |
| B H Bricklaying Ltd | Construction | 2023 |
| B H Protective Coatings Ltd | Administrative & support | 2020 |
| B7 Associates Ltd | Wholesale & retail | 2020 |
| Babonatale Limited | Hospitality | 2025 |
| Baby Grey NCL Ltd | Hospitality | 2020 |
| Babyback Ltd | Hospitality | 2024 |
| Bafta Waste Management Ltd | Water & waste | 2026 |
| Bair Bargains Ltd | Wholesale & retail | 2024 |
| Bair Essentials Ltd | Wholesale & retail | 2019 |
| Baksam Ltd | Wholesale & retail | 2025 |
| Balde Logistics Limited | Transport & logistics | 2025 |
| Baldwin Properties (NE) Ltd | Real estate | 2025 |
| Bali Abodes Ltd | Real estate | 2024 |
| Baltic Mortgage Solutions Limited | Financial services | 2008 |
| Bar 22 Leisure Ltd | Wholesale & retail | 2019 |
| Barefoot Therapy Ltd | Wholesale & retail | 2023 |
| Bargain Deal Direct Ltd | Wholesale & retail | 2025 |
| Barnett Support Ltd | Professional & scientific | 2018 |
| Barrier Architectural Services Limited | Professional & scientific | 2012 |
| Barrier Energy Limited | Manufacturing | 2026 |
| Barrier Fabrication Limited | Manufacturing | 2023 |
| Barrier Fire Protection Limited | Construction | 1998 |
| Barrier Group Limited | Professional & scientific | 1998 |
| Barrier Hvac Limited | Construction | 2023 |
| Barrier Industrial Services Limited | Construction | 2020 |
| Barringtons NE Ltd | Hospitality | 2020 |
| Barspot Advertising UK Limited | Professional & scientific | 2018 |
| Bear Recruitment and Consultancy Ltd | Administrative & support | 2020 |
| Beast Burgers Ltd | Hospitality | 2026 |
| Beautiful Nails VCV Ltd | Other services | 2025 |
| Bebside Autosprays Ltd | Wholesale & retail | 2014 |
| Bede Wealth Management Limited | Financial services | 2009 |
| Bellamar Estates Ltd | Other services | 2016 |
| Bellissimo Beauty - Training Academy Ltd | Other services | 2023 |
| Bellissimo Beauty NCL Ltd | Other services | 2025 |
| Belvedere Residential Cleaning Ltd | Administrative & support | 2022 |
| BEN Bell Limited | Professional & scientific | 2026 |
| Bensons Brewing Company Limited | Hospitality | 2017 |
| Berry Leisure Limited | Hospitality | 2019 |
| Best Car Wash NCL Ltd | Administrative & support | 2024 |
| Bestford Insurance Brokers Ltd | Financial services | 2021 |
| Beta RHO Consultancy Limited | Education | 2013 |
| Bewicke Service Station Limited | Wholesale & retail | 2014 |
| Billiardgvb Ltd | Transport & logistics | 2020 |
| Birtley Removals and Storage Ltd | Transport & logistics | 2019 |
| Black Dog Electrical Limited | Construction | 2013 |
| Black Lodge Red Room Ltd | Administrative & support | 2022 |
| Blackmagic Recovery NE Ltd | Transport & logistics | 2024 |
| Blagdon Gallery Ltd | Wholesale & retail | 2019 |
| Blondie Locks Ltd | Other services | 2024 |
| Blue Line Processing Ltd | Transport & logistics | 2019 |
| Blue Line Services Ltd | Real estate | 2008 |
| Blue Plate Cabs Ltd | Transport & logistics | 2019 |
| Blue Star Mental Wealth Limited | Hospitality | 2024 |
| Blue Tyne Management Limited | Professional & scientific | 2019 |
| Blueprint Construction, Modelmaking and Design Ltd. | Manufacturing | 2014 |
| Bluerice 11 Ltd | Hospitality | 2022 |
| BMS Roofing Services Limited | Construction | 2018 |
| Bmtitron UK Limited | Professional & scientific | 2003 |
| BNR Limited | Administrative & support | 2025 |
| BOATMAC62 Ltd | Transport & logistics | 2024 |
| Boboro Holdings UK Ltd. | Wholesale & retail | 2020 |
| Bobstar 2005 Ltd | Financial services | 2012 |
| Bodyhacks Fitness Ltd | Education | 2022 |