| Atlas Building and Construction Limited | Construction | 2002 |
| ATS (Service) Ltd | Water & waste | 2002 |
| Autohistoric Ltd | Wholesale & retail | 2006 |
| Avid Games Ltd | Extraterritorial | 2023 |
| Awakening Light Ltd | Health & social care | 2020 |
| Away Rentals Ltd | Wholesale & retail | 2019 |
| BAD BOT Studio Ltd | Information & communication | 2011 |
| Bailey & Co Conveyancing Services Ltd | Professional & scientific | 2014 |
| Bailey & Co Legal Services Ltd | Professional & scientific | 2014 |
| Bakerboys Properties Ltd | Real estate | 2010 |
| BAM Stiles Holdings Limited | Financial services | 2022 |
| Bambeco Company Ltd | Wholesale & retail | 2018 |
| Bangla Rasoi Ltd | Hospitality | 2025 |
| Barber Aslan Ltd | Other services | 2021 |
| Barnacle Estates Limited | Real estate | 2024 |
| BAS Building Ltd | Construction | 2021 |
| Bass Drum Digital Limited | Extraterritorial | 2020 |
| Baulf-James Limited | Administrative & support | 2010 |
| BDL Holdings Limited | Wholesale & retail | 2009 |
| Beaconwild Ltd | Hospitality | 1962 |
| Bear and Bodkin Ltd | Information & communication | 2026 |
| Beast Plus K9 Ltd | Administrative & support | 2017 |
| Beautique Merchandise Ltd | Wholesale & retail | 2018 |
| Beecham Place Management Limited | Real estate | 1993 |
| Bell Catering Solutions Ltd | Manufacturing | 2025 |
| Bell Reed Kennels & Cattery Ltd | Other services | 2024 |
| Bellamy's Limited | Administrative & support | 2008 |
| BEN Harman Arboriculture Ltd | Administrative & support | 2003 |
| BEN Thain Carpentry Limited | Construction | 2015 |
| BEN Wark Carpentry and Construction Ltd | Construction | 2018 |
| Benali Building Services LLP | | 2025 |
| Benchfield Limited | Information & communication | 1993 |
| Big Beach Café Ltd | Extraterritorial | 2025 |
| Big SAM the Mowing MAN LLP | | 2023 |
| Bikegoo Ltd | Wholesale & retail | 2018 |
| Bio-Sustainability Limited | Extraterritorial | 2008 |
| Bishops Office Products Limited | Wholesale & retail | 1991 |
| BL Consulting Ltd | Professional & scientific | 2024 |
| Black Label Grading Ltd | Other services | 2020 |
| BLC Accomodations Ltd | Real estate | 2025 |
| Blue Morpho Creative Ltd | Administrative & support | 2025 |
| Blue Nine Design Ltd | Professional & scientific | 2003 |
| Bluebell Meadow Management Ltd | Households | 2024 |
| BLZ Productions Limited | Information & communication | 2000 |
| Bmdk Holdings Limited | Professional & scientific | 2021 |
| Bmdk Limited | Professional & scientific | 2009 |
| BN Scaffolding SE Ltd | Construction | 2020 |
| BOB Judson Consulting Ltd | Professional & scientific | 2018 |
| Boha Gifts Limited | Administrative & support | 2017 |
| Bomzitit Ltd | Information & communication | 2020 |
| Boorman Holdings Limited | Financial services | 2023 |
| Bracken Innovations Limited | Information & communication | 2025 |
| Bracon Direct Limited | Wholesale & retail | 1952 |
| Bramble Court Residents Association Limited | Administrative & support | 1999 |
| Bramble Oak Limited | Financial services | 2022 |
| Bramleydown Ltd | Construction | 2020 |
| Branksome Developments (S.E.) Ltd | Construction | 2023 |
| Branksome Developments Ltd | Construction | 2025 |
| Brayfield Ltd | Professional & scientific | 2011 |
| Breaky Bottom Ltd | Manufacturing | 2013 |
| Brian Edwards Consulting Limited | Professional & scientific | 2024 |
| Brindley Risk Consultancy Limited | Financial services | 2011 |
| Britpets Limited | Wholesale & retail | 2019 |
| Broad Oak Landscape & Construction LLP | | 2024 |
| Broad Oaks Timber Products Limited | Construction | 2002 |
| Bryant-Funnell Ltd | Arts & recreation | 2015 |
| Bucking Hell Apparel Ltd | Wholesale & retail | 2023 |
| Bullbridge Storage Limited | Transport & logistics | 2005 |
| Bunkles Limited | Professional & scientific | 2024 |
| Buss Buildings Ltd | Real estate | 2012 |
| Butchers Hook Cafe Ltd | Hospitality | 2017 |
| Butchers Hook of Heathfield Limited | Wholesale & retail | 2015 |
| Buttons Farm Limited | Agriculture & fishing | 2010 |
| C & S Property SW Limited | Real estate | 2026 |
| C R Hagues Ltd | Construction | 2010 |
| C&H Building Limited | Construction | 2022 |
| C. & S. Auto Supplies (Heathfield) Limited | Real estate | 1972 |
| Cabin at the Wood Limited | Hospitality | 2020 |
| Cade Street Nursery Ltd | Agriculture & fishing | 2024 |
| Caelum Audio Ltd | Information & communication | 2019 |
| Caledonia Removals Limited | Extraterritorial | 2013 |
| Calico Partners Ltd | Manufacturing | 2021 |
| Camberley Windows Limited | Construction | 2009 |
| Camden Court Ltd | Households | 2012 |
| CAN Draw Ltd | Education | 2011 |
| Capitalise Business Support Limited | Financial services | 2003 |
| Car PR Limited | Information & communication | 2002 |
| Cards, the Universe and Everything Ltd | Extraterritorial | 2023 |
| Carr Contractors Limited | Construction | 2003 |
| Case Partners Ltd | Financial services | 2025 |
| Cashman Marine Consulting Limited | Administrative & support | 2024 |
| CC Roofers Ltd | Construction | 2023 |
| Ceewhy Vancouver Limited | Transport & logistics | 2002 |
| Ceiltech Limited | Construction | 2011 |
| Cellars of Italy LLP | | 2016 |
| Centre for Future Studies UK Limited | Professional & scientific | 2012 |
| Centurion Energy Ltd | Construction | 2020 |
| Cerfrouge Ltd | Agriculture & fishing | 1999 |
| Certus Electrical Ltd | Construction | 2022 |
| Cfds (Pro) Ltd. | Financial services | 2010 |