| Athanor Systems Ltd | Professional & scientific | 2026 |
| Atlas Electrical Solutions Limited | Construction | 2016 |
| Atlas Solar Limited | Professional & scientific | 2022 |
| Atspeed Limited | Information & communication | 2012 |
| Auck Consultations Ltd | Health & social care | 2023 |
| Audio Bar One Ltd | Administrative & support | 2025 |
| Audio Visceral Limited | Information & communication | 2021 |
| Aunt Jess Limited | Wholesale & retail | 2024 |
| Aura QUE Limited | Manufacturing | 2008 |
| Auri Consult Ltd | Professional & scientific | 2026 |
| Aurous Security Services Limited | Administrative & support | 2018 |
| Austen Powers Electrical Contractors Ltd | Construction | 2023 |
| Autonoware Limited | Financial services | 2012 |
| AV Data Ltd | Information & communication | 2017 |
| Avcm Studios Limited | Information & communication | 2023 |
| Avenida Solutions Limited | Information & communication | 2024 |
| AVK Retail Shop Limited | Wholesale & retail | 2026 |
| Awlad Hussain Ltd | Hospitality | 2019 |
| Axes Property Holdings Ltd | Real estate | 2020 |
| Axonmedical Ltd | Public administration | 2020 |
| Aylottaero Limited | Professional & scientific | 2021 |
| Ayrton Properties Ltd | Real estate | 2024 |
| AZO Cafe Limited | Hospitality | 2024 |
| Azrights International Ltd | Administrative & support | 2012 |
| B & R Productions Ltd | Arts & recreation | 1999 |
| B Taylor & Sons Ltd | Arts & recreation | 2013 |
| B. Winchester Limited | Construction | 2007 |
| Baileys Bay Limited | Real estate | 2025 |
| Baker Motors Limited | Wholesale & retail | 2016 |
| Baker Motors MOT Ltd | Wholesale & retail | 2024 |
| Bakerboys Enterprises Ltd | Real estate | 2006 |
| Balanbook Ltd | Other services | 2025 |
| BAM Limited | Real estate | 2004 |
| Bangla Kuryz Indian Takeaway Ltd | Hospitality | 2018 |
| Bar Hideaway Limited | Hospitality | 2025 |
| Barley Wood Limited | Manufacturing | 1998 |
| Barryco Ltd | Professional & scientific | 2016 |
| Bartletts Metal Recycling Ltd | Wholesale & retail | 2013 |
| Base Builders and Surveyors Ltd | Administrative & support | 2018 |
| Base Fish Bar Ltd | Hospitality | 2018 |
| Bassett Group Properties Ltd. | Real estate | 2024 |
| Batley Holdings Limited | Real estate | 2018 |
| Battersea Estates Limited | Real estate | 2007 |
| Battle and Hastings Glass Limited | Construction | 2019 |
| Battle Bespoke Limited | Construction | 2015 |
| Battle Glass Limited | Construction | 2020 |
| Baumeister Limited | Construction | 2024 |
| BC Diamond Drilling & Sawing Ltd | Construction | 2021 |
| BC Diamond Drilling Ltd | Construction | 2025 |
| BE the Sea Change CIC | Manufacturing | 2026 |
| Bead Residential Ltd | Real estate | 2026 |
| Beastinvest Group Ltd | Professional & scientific | 2026 |
| Beaufort Villas Limited | Construction | 2022 |
| Beauport Park Golf & Country Club Limited | Arts & recreation | 2018 |
| Bedford House Freehold Ltd | Households | 2025 |
| Belacapitalgroup Ltd | Manufacturing | 2025 |
| Belgium Bar Solutions Ltd | Hospitality | 2025 |
| Bellamy Jean Ltd | Arts & recreation | 2026 |
| Bellil Holdings Ltd | Financial services | 2025 |
| Belrose Group Limited | Construction | 2010 |
| BEN FOY Limited | Construction | 2010 |
| BEN Gerrard Limited | Wholesale & retail | 2014 |
| Beneys Ltd | Wholesale & retail | 2023 |
| Benge Limited | Construction | 2003 |
| Benjamin Sales Building Ltd | Construction | 2019 |
| Benni Carol Ltd | Professional & scientific | 2026 |
| Bennicks Building and Roofing Ltd | Construction | 2020 |
| Bentley & Hall Limited | Extraterritorial | 2014 |
| Bentleys Clucker Chicken Limited | Hospitality | 2022 |
| Bentleys Smokehouse Limited | Hospitality | 2018 |
| Bentleys Tulip Limited | Hospitality | 2024 |
| Bentleys Tulleys Farm Limited | Hospitality | 2020 |
| Berlinetta Films Ltd | Extraterritorial | 2021 |
| Berobozo Limited | Hospitality | 2025 |
| Berwick Clearances Ltd | Other services | 2025 |
| Beryl Studios Ltd | Real estate | 2022 |
| Bespoke Building and Renovation Limited | Construction | 2006 |
| Betrusted Limited | Wholesale & retail | 2012 |
| Bexhill Family Collective CIC | Education | 2020 |
| Bexhill News Limited | Extraterritorial | 2022 |
| Bexhill Property Developments Limited | Real estate | 2018 |
| Bexperimental Limited | Arts & recreation | 2022 |
| Bfgroundworks Limited | Construction | 2020 |
| Bguk Fitters Ltd | Construction | 2021 |
| BH Gardening Ltd | Administrative & support | 2024 |
| BH Plumbing & Heating Ltd | Construction | 2022 |
| BH Smiles Ltd | Health & social care | 2025 |
| Bh&Jr Limited | Construction | 2023 |
| Big Bear Geomatics Ltd | Construction | 2024 |
| Biglensmedia Ltd | Information & communication | 2025 |
| Bikr Ltd | Administrative & support | 2025 |
| Bill Kain Architecture Ltd | Professional & scientific | 2024 |
| Billing Services Ltd | Construction | 2026 |
| Birchwood Consultancy Limited | Professional & scientific | 2026 |
| Birecik Limited | Hospitality | 2025 |
| Bixby Mart PVT Ltd | Manufacturing | 2026 |
| Bjoro Limited | Manufacturing | 2024 |
| BK Architecture Ltd | Professional & scientific | 2026 |
| Black Rock Model Rail Company Ltd | Manufacturing | 2019 |
| Blackadder International Limited | Wholesale & retail | 1995 |