| Brierfield Catering Ltd | Wholesale & retail | 2024 |
| Brierfield Spice House Ltd | Hospitality | 2025 |
| Bright Engineering (Precision Products) Ltd | Manufacturing | 2016 |
| Bright Engineering Holdings Limited | Financial services | 2025 |
| Bright-Line Leaf Ltd | Professional & scientific | 2025 |
| Brightkart Ltd | Wholesale & retail | 2025 |
| Britannia Double Glazing Ltd | Construction | 2022 |
| Britannia Technopolymers Limited | Manufacturing | 2016 |
| Britannia Umrah Tours Ltd | Administrative & support | 2023 |
| Britrack Ltd | Manufacturing | 2023 |
| Britrax Ltd | Wholesale & retail | 2025 |
| Broden Lloyd Limited | Real estate | 2004 |
| Brooklands Residence Ltd | Real estate | 2023 |
| Brother and Sons Traders Limited | Wholesale & retail | 2021 |
| Brown Hill Commercial Ltd | Real estate | 2026 |
| Brownloaf Ltd | Professional & scientific | 2025 |
| Browns Building & Civils Ltd | Construction | 2024 |
| Browns Ladders & Ceilings Limited | Other services | 2006 |
| Browns Rentals Ltd | Real estate | 2025 |
| Brtl Ltd | Administrative & support | 2023 |
| Brunch Corner Limited | Hospitality | 2022 |
| Brunch Corner Nelson Ltd | Hospitality | 2025 |
| Brunlea Estate Agents Limited | Real estate | 2008 |
| Brunlea Estates Limited | Real estate | 2008 |
| Bryony Kimmings Ltd. | Arts & recreation | 2014 |
| Bryony Kimmings Productions Ltd | Information & communication | 2020 |
| BS Trading Ltd | Transport & logistics | 2018 |
| Bspar Ltd | Administrative & support | 2023 |
| Bteck Ltd | Wholesale & retail | 2025 |
| Buckt Ltd | Information & communication | 2016 |
| Budget Exhausts & Tyres Ltd | Wholesale & retail | 2019 |
| Build-A-Van Ltd | Manufacturing | 2005 |
| Buildakit (UK) Limited | Construction | 2002 |
| Buildakit Construction Ltd | Construction | 2023 |
| Building Bridges Network | Education | 2011 |
| Buksh Properties Ltd. | Real estate | 2024 |
| Bully's Woodworks Limited | Construction | 2008 |
| Buoyant Holdings Limited | Professional & scientific | 2002 |
| Buoyant Upholstery Limited | Manufacturing | 1998 |
| Buraq Trading 1 Limited | Wholesale & retail | 2026 |
| Buraq Travel Ltd | Administrative & support | 2021 |
| Burger Point Nelson Ltd | Hospitality | 2026 |
| Burnley Catering Supplies Limited | Wholesale & retail | 2011 |
| Burnley Gym 1 Ltd | Real estate | 2018 |
| Burnley Plasterboard & Gypsum Recycling Ltd | Water & waste | 2018 |
| Burnley Van Sales Ltd | Wholesale & retail | 2025 |
| Burnt House Trustee Developments Limited | Construction | 1999 |
| Burrows Mini Coaches Ltd | Transport & logistics | 2013 |
| Business Debt Advisers Limited | Professional & scientific | 2020 |
| Business Energy and Marketing Ltd | Information & communication | 2021 |
| Business Helpline Group Limited | Administrative & support | 2023 |
| Buybest Discount Store Ltd | Wholesale & retail | 2022 |
| Buypasshop Ltd | Wholesale & retail | 2025 |
| Buzzsphere Marketing Services Ltd | Information & communication | 2025 |
| Buzzsphere Printing Services Ltd | Professional & scientific | 2025 |
| BVP Solutions Group Limited | Wholesale & retail | 2026 |
| BWS Developments Ltd | Financial services | 2018 |
| BWS Propco Ltd | Real estate | 2022 |
| Bystone Properties Limited | Extraterritorial | 2015 |
| Bãlance Studio Apparel Ltd | Wholesale & retail | 2025 |
| C & G Holdings LP | | 2023 |
| C 'N' C Concepts Ltd | Wholesale & retail | 2024 |
| C P & G Coates Limited | Transport & logistics | 2007 |
| C R Transports Limited | Other services | 2015 |
| C.C. Engineering (Cumbria) Limited | Professional & scientific | 2007 |
| C.M.I. Lexaire Ltd | Manufacturing | 2005 |
| Cabline Taxis Limited | Transport & logistics | 2026 |
| Cablink Services Limited | Administrative & support | 2026 |
| Cabtracks Limited | Administrative & support | 2017 |
| Cafe Express Nelson Ltd | Hospitality | 2024 |
| Cafe MIO (Epping) Limited | Administrative & support | 2005 |
| Caislean Estates Limited | Real estate | 2018 |
| Cakencrumble Ltd | Arts & recreation | 2021 |
| Calang Limited | Construction | 2016 |
| Calder Developments Ltd | Real estate | 2021 |
| Calderdale Sound Community Radio Limited | Information & communication | 1985 |
| Calibre Digital Consulting Limited | Administrative & support | 2016 |
| Callmee Ltd | Construction | 2019 |
| Calon Property Developments Ltd | Real estate | 2021 |
| Campbell Driver Partnership Limited | Professional & scientific | 2002 |
| Canalside Garage Ltd | Wholesale & retail | 2026 |
| Cannabasevape Ltd | Wholesale & retail | 2025 |
| Capricorn Education Limited | Education | 2025 |
| Car Connect 365 Ltd | Wholesale & retail | 2025 |
| Car Multimedia Ltd | Wholesale & retail | 2018 |
| Carbon Cutters Ltd | Construction | 2023 |
| Care 4 U Northwest Ltd | Health & social care | 2025 |
| Care and Leisure Textiles Ltd | Manufacturing | 2000 |
| Care Clean Limited | Administrative & support | 2026 |
| Care Plus NW Limited | Information & communication | 2023 |
| Carepal Assist Limited | Financial services | 2013 |
| Carepal UK Limited | Financial services | 2013 |
| Carepoint HC Limited | Health & social care | 2019 |
| Carepoint Housing Limited | Hospitality | 2020 |
| Carmart Motor Company Limited | Wholesale & retail | 2025 |
| Carmem Ltd | Wholesale & retail | 2024 |
| CARPETS4U Colne Ltd | Wholesale & retail | 2022 |
| Carrside One Business Centre Limited | Real estate | 2017 |
| Carsons Ceramics Ltd | Administrative & support | 2024 |
| Carwal Limited | Other services | 2021 |