| Banner Bridge Advertising Ltd | Professional & scientific | 2025 |
| Battered Cabbage Limited | Extraterritorial | 2021 |
| Baxterdale Limited | Real estate | 2020 |
| BBR Bloodstock Ltd | Agriculture & fishing | 2021 |
| BC Acquisition Limited | Real estate | 2023 |
| BDR Electrical Ltd | Construction | 2019 |
| Beacon Management Solutions Ltd | Information & communication | 2024 |
| Beards Mill Consulting Ltd | Information & communication | 2007 |
| Beauty With Nadia Limited | Other services | 2020 |
| BEN Osborne Limited | Health & social care | 2022 |
| Benhall Properties Ltd | Households | 2025 |
| Bennett's Transport Limited | Transport & logistics | 2021 |
| Berfin Limited | Real estate | 2025 |
| Berkshire Finance Group Limited | Financial services | 2023 |
| Bespoke Personal Training Limited | Arts & recreation | 2024 |
| Bespoke Property Management Ltd | Real estate | 2015 |
| Beyond Storage Carmarthen Limited | Other services | 2011 |
| Beyond Storage Group Limited | Financial services | 2021 |
| Beyond Storage Herefordshire Limited | Other services | 2014 |
| Beyond Storage Newport Limited | Other services | 2025 |
| Beyond Storage Treforest Limited | Other services | 2022 |
| BFE Consultancy Ltd | Professional & scientific | 2024 |
| BFG Accounting Limited | Professional & scientific | 2025 |
| BFG Recoveries Limited | Financial services | 2025 |
| BFG Tax Consultancy Limited | Professional & scientific | 2025 |
| BG Renovations Limited | Construction | 2002 |
| BGD Developments Limited | Construction | 2017 |
| BHF Consulting Services Ltd | Professional & scientific | 2022 |
| Big House Holiday Lets Ltd | Hospitality | 2003 |
| Biggs Property Limited | Real estate | 2025 |
| Biggs Property NO1 Limited | Real estate | 2025 |
| Biggs Property NO2 Limited | Real estate | 2025 |
| Biggs Property NO3 Limited | Real estate | 2025 |
| Biggs Property NO4 Limited | Real estate | 2025 |
| Bighouselets Limited | Real estate | 2005 |
| Bijoux Maison Limited | Real estate | 2019 |
| Bishopswood Engineering Ltd | Professional & scientific | 2022 |
| Bivia Meadow Residents Association Limited | Households | 2019 |
| Bizgraph Ltd | Information & communication | 2014 |
| Black Box Sauna Ltd | Other services | 2025 |
| Black Mountain Clothing Limited | Wholesale & retail | 2015 |
| Blanc DE Blanc Limited | Hospitality | 2025 |
| Blank Canvas Antiques Limited | Wholesale & retail | 2019 |
| BLU Beri Ltd | Manufacturing | 2011 |
| Bluewave Partners Limited | Professional & scientific | 2019 |
| Boffin International Ltd | Professional & scientific | 2025 |
| Bonham Knight Limited | Professional & scientific | 2011 |
| Bookpinger Ltd | Extraterritorial | 2021 |
| Boomerang Property Company Limited | Real estate | 2016 |
| Border Consulting Ltd. | Professional & scientific | 2015 |
| Bosse Interspice Limited | Wholesale & retail | 1990 |
| Boutique at NO2 Ltd | Wholesale & retail | 2019 |
| Bracksieker UK Ltd | Manufacturing | 2019 |
| Brackston Land Ltd | Agriculture & fishing | 2012 |
| Bramble Coombe Limited | Real estate | 2017 |
| Brambles Residents Association LEA Ltd | Extraterritorial | 2011 |
| Brampton Stores Ltd | Wholesale & retail | 2026 |
| Breathex Ltd | Wholesale & retail | 2025 |
| Bredon Hill Autograss Club Limited | Arts & recreation | 1987 |
| Bronwin and Abbey Holdings Limited | Financial services | 2022 |
| Bronwin and Abbey Limited | Agriculture & fishing | 1996 |
| Brook House Flats Limited | Real estate | 2010 |
| Brookend Court Management Limited | Real estate | 2021 |
| Brookside Camping Limited | Hospitality | 2024 |
| Brown Groundwork Contracting Limited | Construction | 2018 |
| Bude Yoga and Therapy Space Limited | Health & social care | 2018 |
| Build IT and They Will Come Ltd | Arts & recreation | 2019 |
| Bulk&Swole Ltd | Health & social care | 2023 |
| Burton Rail Freight Terminal Limited | Transport & logistics | 2000 |
| Busbys Hair and Beauty Limited | Other services | 2012 |
| Buysell Trading Ltd | Wholesale & retail | 2010 |
| Bvct Ltd | Households | 2012 |
| C & M Automations Ltd | Manufacturing | 2025 |
| C and C Costings Limited | Professional & scientific | 2006 |
| C Challenger Electrical Services Ltd | Construction | 2022 |
| C R Pool & Garden Services Ltd | Professional & scientific | 2018 |
| C Thomas Contracting Ltd | Financial services | 2023 |
| C Whitworth Limited | Agriculture & fishing | 2017 |
| C. N. Danterwood Limited | Hospitality | 2006 |
| CA Phillips Property Ltd | Real estate | 2020 |
| Cabernet B Limited | Professional & scientific | 2022 |
| Cafe Delights Ross on WYE Ltd | Hospitality | 2025 |
| Callanish Consulting Ltd | Information & communication | 2020 |
| Callanish Property Limited | Real estate | 2022 |
| Callion Ltd | Real estate | 2012 |
| Caltek Services Limited | Information & communication | 1992 |
| Cambrian Event Services Limited | Administrative & support | 2026 |
| Canoe the WYE Ltd | Administrative & support | 2015 |
| Canvas Construction Limited | Construction | 2020 |
| Cape Evergreen UK Ltd | Administrative & support | 2012 |
| Capital Pads Ltd | Real estate | 2024 |
| Capitalise Solutions Limited | Professional & scientific | 2009 |
| Capitol Imagesetters Ltd. | Manufacturing | 1985 |
| Caple Security Services Ltd | Administrative & support | 2010 |
| Carb'N-Off Limited | Administrative & support | 2010 |
| Care Solutions (East Anglia) Limited | Health & social care | 2020 |
| Care Sync Limited | Health & social care | 2023 |
| Carrot & Stick Food Ltd | Hospitality | 2025 |
| Casa DI Dolcezza Ltd | Hospitality | 2025 |
| Castillon Associates LLP | | 2006 |