| BHC Technology Centre Limited | Professional & scientific | 2015 |
| Bhuskute PVT Ltd | Real estate | 2011 |
| BI BOB Limited | Information & communication | 2023 |
| Bibbys of Halifax Limited | Manufacturing | 2003 |
| Bienkowski Transport Ltd. | Transport & logistics | 2019 |
| Bifa Trading Online Ltd | Wholesale & retail | 2024 |
| Biffin Technology Limited | Information & communication | 2012 |
| Big Car Shop Limited | Wholesale & retail | 2026 |
| Big Fish Brands Ltd | Wholesale & retail | 2020 |
| Big in the North Limited | Professional & scientific | 2018 |
| Big in the South Limited | Professional & scientific | 2022 |
| Big J BBQ Company Ltd | Arts & recreation | 2025 |
| Big MIC Limited | Administrative & support | 2024 |
| Big SIX 2021 Ltd | Hospitality | 2021 |
| Big Supplies Small Price Limited | Wholesale & retail | 2024 |
| Billa Trading Ltd | Wholesale & retail | 2025 |
| Billionex Ventures Ltd | Wholesale & retail | 2026 |
| Bindi Group Ltd | Construction | 2025 |
| Bindis Blueprints Ltd | Professional & scientific | 2024 |
| Bingham Dairies Limited | Wholesale & retail | 2020 |
| Bingley Demolition Limited | Construction | 2005 |
| Binns & Sons (Greetland) Limited | Professional & scientific | 1954 |
| Biochar Innovations Limited | Agriculture & fishing | 2022 |
| Biopanel Systems Limited | Manufacturing | 2014 |
| Birch Residential Ltd | Real estate | 2021 |
| Birds Royd Property Co.Limited | Real estate | 1963 |
| Birdstone Developments Ltd | Construction | 2017 |
| Birkby Farms Limited | Administrative & support | 2016 |
| Birks Royd Consultancy Services Ltd | Administrative & support | 2026 |
| Birstall Trees & Landscaping Limited | Administrative & support | 2026 |
| Bismilla Roti House Ltd | Hospitality | 2026 |
| Biswal Nigeria (UK) Limited | Information & communication | 2021 |
| Bitsnbobsuk Limited | Wholesale & retail | 2012 |
| Bitxbyte Ltd | Information & communication | 2026 |
| Bjorn Again Vintage Limited | Wholesale & retail | 2012 |
| BL Properties Halifax Ltd | Real estate | 2023 |
| Black Booters Ltd | Wholesale & retail | 2024 |
| Black Douglas Projects Limited | Construction | 2025 |
| Black Gold Tyres Ltd | Wholesale & retail | 2024 |
| Black Horse KF Ltd | Hospitality | 2017 |
| Black LAB Properties Ltd | Real estate | 2018 |
| Black Myres Property Ltd | Real estate | 2021 |
| Black Star Beverages Ltd | Wholesale & retail | 2024 |
| Black Star Pubs (Old Cock) Limited | Hospitality | 2020 |
| Blackbriar (Holdings) Ltd | Financial services | 2024 |
| Blackbrook Garage Limited | Wholesale & retail | 2012 |
| Blackline Kitchens Limited | Construction | 2026 |
| Blackrock Motor Sales Ltd | Wholesale & retail | 2021 |
| Blackwall Homes Ltd | Real estate | 2021 |
| Blackwall Investment Group Ltd | Real estate | 2018 |
| Blai Limited | Professional & scientific | 2019 |
| Blandford Barrows Ltd | Wholesale & retail | 2025 |
| Blend Solutions Ltd | Information & communication | 2017 |
| Blindsmill Ltd | Manufacturing | 2018 |
| Bliss Lounge Limited | Other services | 2020 |
| BLK Hospitality Ltd | Hospitality | 2025 |
| Blob Coffee Ltd | Hospitality | 2025 |
| Bloom Business Solutions Group Limited | Professional & scientific | 2008 |
| Bloom Hair and Education Limited | Other services | 2026 |
| Bloom Medical Imaging Ltd | Professional & scientific | 2024 |
| Bloom Street Entertainment Ltd | Hospitality | 2021 |
| Bloom Street Property Management Ltd | Real estate | 2021 |
| Blooms D'Amour Florists Ltd | Wholesale & retail | 2026 |
| Blossom Waves Limited | Wholesale & retail | 2025 |
| Blossoms and Co. (Yorkshire) Ltd | Wholesale & retail | 2024 |
| Blue Ginger (UK) Limited | Professional & scientific | 2003 |
| Blue Peak Performance Limited | Wholesale & retail | 2026 |
| Blue Rock Energy Ltd | Construction | 2025 |
| Blue Simba Ltd | Administrative & support | 2018 |
| Blue Slate Properties Limited | Real estate | 2014 |
| Blue Star Model Yachts UK Limited | Administrative & support | 2012 |
| Blue Steel IT Ltd | Information & communication | 2016 |
| Blue Stryke Ltd | Construction | 2017 |
| Bluerock Business Solutions Limited | Professional & scientific | 2023 |
| Bluesec Services Group Limited | Wholesale & retail | 2017 |
| Bluespot Investments Limited | Real estate | 2013 |
| Bluestone Commerce Ltd | Wholesale & retail | 2026 |
| Blzinfluence Ltd | Professional & scientific | 2025 |
| BM Events Halifax Ltd | Hospitality | 2026 |
| BM Ventures Limited | Wholesale & retail | 2015 |
| BMA Plumbing & Heating Ltd | Construction | 2014 |
| BMB Private Ltd | Health & social care | 2018 |
| BMC (Halifax) Ltd | Wholesale & retail | 2022 |
| BMH Corporate Finance Ltd | Professional & scientific | 2025 |
| BMH IT Solutions Ltd | Information & communication | 2013 |
| BMT Building & Joinery Ltd | Construction | 2023 |
| BNG Ecology Limited | Professional & scientific | 2024 |
| BNM Technology Group Ltd | Energy | 2022 |
| Bodafon Country Estate Management Limited | Households | 2004 |
| Bodanova Ltd | Households | 2026 |
| Bodeck Limited | Transport & logistics | 2025 |
| Bodynet Limited | Information & communication | 2003 |
| Boho Interiors Limited | Wholesale & retail | 2024 |
| Boightpath Networks Ltd | Wholesale & retail | 2025 |
| Bojko Ltd | Extraterritorial | 2019 |
| Bokaap Ltd | Wholesale & retail | 2025 |
| Bolehill Waller Ltd | Wholesale & retail | 2025 |
| Bolsover Render Financial Planning Ltd | Financial services | 2011 |
| BON BON Milk Bars (Halifax) Limited | Hospitality | 2009 |
| BON BON Properties Limited | Professional & scientific | 2006 |