| Boutiqe Ltd | Wholesale & retail | 2022 |
| BOW Street School Limited | Education | 2014 |
| Box Driving School Limited | Education | 2026 |
| Box YA Socks OFF Ltd | Arts & recreation | 2025 |
| BPA Consultant Limited | Information & communication | 2008 |
| Bradoak Holdings Limited | Financial services | 2020 |
| Bradoak Services Limited | Construction | 2011 |
| Bradshaw Bros Ltd. | Wholesale & retail | 1964 |
| Bradshaw Manor Care Ltd | Health & social care | 2022 |
| Bradwell Community Sports Group Limited | Arts & recreation | 2013 |
| Bradwell House Limited | Real estate | 1955 |
| Bradwell Service Group Ltd | Professional & scientific | 2018 |
| Brainforge Games Ltd | Information & communication | 2025 |
| Braitian UK Ltd | Information & communication | 2025 |
| Brampton House Limited | Wholesale & retail | 1971 |
| Brampton West Management Company Limited | Households | 2005 |
| Brampton Wood Management Company Limited | Households | 2003 |
| Bramptons Accountants Limited | Professional & scientific | 2008 |
| Bramptons Estate Agents Limited | Real estate | 2009 |
| Bramptons F S Limited | Administrative & support | 2008 |
| Bramptons Limited | Extraterritorial | 2023 |
| Bramptons Mortgage Centre Ltd | Financial services | 2020 |
| Bramptons Property Ltd | Real estate | 2020 |
| Brandingx Studio Ltd | Wholesale & retail | 2026 |
| Brannigan Plumbing & Heating Limited | Construction | 2015 |
| Brayface Ltd | Agriculture & fishing | 2017 |
| Breakthrough Bars NUL Ltd | Hospitality | 2025 |
| Breeze Support Solutions Ltd | Administrative & support | 2014 |
| Brian Dewsnap Consulting Limited | Construction | 2020 |
| Brian Properties Limited | Real estate | 2024 |
| Bricks Property Management Ltd | Real estate | 2025 |
| Bridge 2 Brighter Futures CIC | Education | 2025 |
| Bridge Street Holdings Limited | Real estate | 2019 |
| Bridgemere Nonwovens Limited | Manufacturing | 2009 |
| Bright Education and Cultural Association | Education | 2010 |
| Brighter Future Properties Ltd | Real estate | 2024 |
| Britannia Consultancy Limited | Professional & scientific | 1998 |
| Bromage Construction Ltd | Construction | 2023 |
| Bromfield of Barbering & Staffordshire Hair Replacement Specialists Ltd | Other services | 2024 |
| Brooklyn Trade Supplies Ltd | Construction | 2021 |
| Brooks Social Work Services Ltd | Health & social care | 2026 |
| Brown Electrical Ltd | Construction | 2025 |
| Browne Property Maintenance Ltd | Construction | 2017 |
| Broxap Design & Build Limited | Extraterritorial | 2009 |
| Broxton Nurseries Ltd | Wholesale & retail | 2019 |
| Brunels of County Down Limited | Hospitality | 2017 |
| Bryansford Cottage Limited | Hospitality | 2019 |
| Brydon PFP Ltd | Construction | 2019 |
| BS Patterns Limited | Manufacturing | 2019 |
| BS Swan Investment Limited | Other services | 2010 |
| Bspk Interiors Limited | Wholesale & retail | 2014 |
| Bstd Ltd | Wholesale & retail | 2023 |
| BSW Autohouse Ltd | Wholesale & retail | 2006 |
| BSW Move & Cleaning Services Limited | Transport & logistics | 2024 |
| BTC Aesthetics Ltd | Other services | 2024 |
| BUA Thai Massage & Spa Ltd | Other services | 2023 |
| Buckley-Gray Consultancy Ltd | Health & social care | 2013 |
| Build Vertex Limited | Construction | 2024 |
| Built by Bobcat Ltd | Information & communication | 2013 |
| Built in Solutions Ltd | Professional & scientific | 2025 |
| Bulkbox B2B UK Ltd | Wholesale & retail | 2025 |
| Bureau Ltd | Education | 2021 |
| Burgeon Solutions Limited | Information & communication | 2015 |
| Burkelet Properties Limited | Real estate | 2021 |
| Burleigh House Hotel and Restaurant Ltd | Hospitality | 2025 |
| Burley Paddocks Livery Ltd | Arts & recreation | 2014 |
| Burma Bacon Supplies Limited | Extraterritorial | 1980 |
| Burn Holdings Ltd | Real estate | 2021 |
| Burns Software Development Ltd | Information & communication | 2016 |
| Burrendale Hotel Limited | Hospitality | 1976 |
| Bursley Investments Ltd | Real estate | 2018 |
| Bush to Brick Ltd | Construction | 2026 |
| Business Enterprise Support Limited | Administrative & support | 1997 |
| Butchies Holdings Ltd | Professional & scientific | 2015 |
| Butchies Ltd | Hospitality | 2015 |
| Butlers Waste Management Ltd | Water & waste | 2004 |
| Butterfly in the Head Ltd | Arts & recreation | 2026 |
| Butters Group Ltd | Professional & scientific | 2021 |
| Butterton Residents Association Limited | Households | 1994 |
| Bvgn Holdings Limited | Financial services | 2025 |
| BWT Pharma & Biotech (UK) Ltd | Other services | 2020 |
| Byrne Delivery Ltd | Transport & logistics | 2025 |
| Bytemetrics Ltd | Information & communication | 2024 |
| C & S PUB Management Ltd | Administrative & support | 2020 |
| C B Passmore Developments Ltd | Construction | 2022 |
| C H P Mechanical (NI) Ltd | Construction | 2026 |
| C J P Investments Limited | Professional & scientific | 2003 |
| C P Hughes Contractors Limited | Construction | 2024 |
| C S Trading Midlands Ltd | Wholesale & retail | 2024 |
| C T Joinery Services Ltd | Construction | 2015 |
| C T Tyres Silverdale Limited | Wholesale & retail | 2005 |
| C&M Electrical Contracts Ltd | Construction | 2023 |
| C&M Painters & Decorators (Staffordshire) Ltd | Construction | 2025 |
| C&S Home and DIY Limited | Wholesale & retail | 2025 |
| C. S. Browning Property Services Limited | Construction | 2004 |
| C.B. Air Conditioning Limited | Energy | 2003 |
| C.P Film Lighting Services Ltd | Administrative & support | 2024 |
| C.Q.A. International Ltd | Mining & quarrying | 1998 |
| C2G Contractors Ltd | Construction | 2025 |
| C9 Logistics Ltd | Construction | 2013 |