| Brammar & Walker Ocularists Limited | Health & social care | 2014 |
| Brammer Sports Management Ltd | Professional & scientific | 2012 |
| Branch Hydraulic Systems Limited | Extraterritorial | 1976 |
| Bratt Urology Ltd | Health & social care | 2023 |
| Bread BIN Limited | Wholesale & retail | 2022 |
| Breaking Convention Limited | Professional & scientific | 2007 |
| Breakspeare Properties Limited | Real estate | 2019 |
| Breatheasy Investments Ltd | Professional & scientific | 2007 |
| Breathing Innovation Limited | Education | 2022 |
| Brereton Grange (Arclid) Management Company Limited | Households | 2016 |
| Briarwood Medical Ltd | Health & social care | 2022 |
| Bridgebourne Limited | Administrative & support | 2025 |
| Bridgeview Property Limited | Real estate | 2016 |
| Bridgewater Court (Management Company) NO.1 Limited | Households | 2011 |
| Brighouse Homes Ollerton Limited | Construction | 2020 |
| Bright Licensing Ltd | Professional & scientific | 2007 |
| Bright New Properties Limited | Real estate | 2023 |
| Bright Training and Consulting Limited | Professional & scientific | 2018 |
| Brightspark Properties Ltd | Hospitality | 2007 |
| Brilliance Within Business Limited | Professional & scientific | 2022 |
| Brindley Court (Stockton Heath) RTM Company Limited | Households | 2019 |
| Brisbane House Limited | Real estate | 2001 |
| Bristol Stone Masonry Ltd | Construction | 2015 |
| Britalia Holdings Limited | Real estate | 2021 |
| Britannia Surgicare Limited | Arts & recreation | 2006 |
| Britbee UK Ltd | Wholesale & retail | 2021 |
| Broad Peak Surgery Limited | Health & social care | 2023 |
| Broadacre (Shepherd Road) Management Company Limited | Households | 2020 |
| Broadsword Exports Ltd | Wholesale & retail | 2022 |
| Broadway 53 Limited | Real estate | 2019 |
| Broadway Verge Limited | Households | 2005 |
| Brook Medical Limited | Health & social care | 2015 |
| Brookdale Rise (Bramhall) Management Company Limited | Households | 1976 |
| Browfield Care Home Limited | Health & social care | 2019 |
| Browfield Care Limited | Health & social care | 2020 |
| Brown Inc Ltd | Professional & scientific | 2007 |
| Brown Leaves Ltd | Hospitality | 2021 |
| Brown- Ford Enterprises Ltd | Hospitality | 2025 |
| Brtn Tech Consulting Ltd | Information & communication | 2024 |
| Bruce Sciple Builders Limited | Construction | 2006 |
| Brunswick Bay Property Limited | Real estate | 2025 |
| Bryn Rhedyn Holiday Rentals Ltd | Real estate | 2026 |
| BSM Management Group Ltd | Education | 2019 |
| BT Anaesthesia Limited | Health & social care | 2019 |
| Buckley Property Services Limited | Real estate | 2022 |
| Budget AV Ltd | Administrative & support | 2024 |
| Bufd Limited | Health & social care | 2024 |
| Buhn Ltd | Manufacturing | 2024 |
| Build by Design (NW) Limited | Construction | 2025 |
| Building Again 2024 Limited | Financial services | 2024 |
| Building OUR Skills Training and Events Limited | Education | 2024 |
| Buildzone Education Ltd | Construction | 2024 |
| Buildzone Heritage Limited | Construction | 2008 |
| Buildzone Maintenance Limited | Construction | 2024 |
| Bullfinch Properties Ltd | Real estate | 2013 |
| Bulstrode Plastic Surgery Limited | Health & social care | 2020 |
| Bundred Medico-Legal Limited | Health & social care | 2012 |
| Bunmi Otubushin Education Consultancy Ltd | Professional & scientific | 2025 |
| Burdekin Lawn Services Limited | Administrative & support | 2016 |
| Bureau Outsourced Processing Limited | Professional & scientific | 2022 |
| Burford Design & Build Limited | Construction | 2017 |
| Burnett Origination Ltd | Administrative & support | 2026 |
| Burstwick Bess Limited | Energy | 2025 |
| Burton Healthcare Limited | Health & social care | 2021 |
| Busco Ltd | Professional & scientific | 2025 |
| Business 4 Sale Limited | Professional & scientific | 2006 |
| Business Consort Limited | Professional & scientific | 2003 |
| Butler Cardiology Limited | Health & social care | 2016 |
| Buy to LET Property Shop Ltd | Real estate | 2016 |
| Buzzy BEE Bakery Ltd | Wholesale & retail | 2019 |
| BY Colony Alderley Ltd | Administrative & support | 2022 |
| BY Colony Holdings Limited | Real estate | 2019 |
| BY Katie Louise Ltd | Other services | 2025 |
| BYB Coaching Fitness Ltd | Arts & recreation | 2021 |
| Byng Orthopaedics Limited | Health & social care | 2012 |
| Byrne & Campbell Roofing Limited | Construction | 2017 |
| C & D Designs Limited | Manufacturing | 2002 |
| C & S Water Treatment Ltd | Water & waste | 2001 |
| C and V Dance Limited | Arts & recreation | 2016 |
| C Armstrong Plumbing & Heating Limited | Construction | 2017 |
| C B Property Manchester Ltd | Construction | 2021 |
| C G Sight Limited | Health & social care | 2019 |
| C M Garner Limited | Professional & scientific | 2010 |
| C N Broomhead Limited | Extraterritorial | 1935 |
| C R Hunt Ltd | Health & social care | 2021 |
| C Rivers Limited | Health & social care | 2024 |
| C&E Consultancy Ltd | Professional & scientific | 2024 |
| C-Cycle Recyclers Limited | Water & waste | 2003 |
| C.D. Interiors Limited | Wholesale & retail | 1992 |
| C.Mountney and Sons Ltd | Wholesale & retail | 2016 |
| C.P.S. Decorators Ltd | Construction | 2014 |
| C2B Limited | Hospitality | 2013 |
| C3 Sales & Consulting Ltd | Wholesale & retail | 2018 |
| Cadri Ltd | Professional & scientific | 2025 |
| Caen Ltd | Professional & scientific | 2014 |
| Caerdeon Dermatology Limited | Health & social care | 2024 |
| Caerus Management Associates Ltd | Professional & scientific | 2018 |
| CAH Homes Ltd | Real estate | 2024 |
| Cajoyhealth Ltd | Health & social care | 2021 |
| CAK Consulting Ltd | Professional & scientific | 2020 |