| Antipole Ltd | Administrative & support | 2016 |
| ANY Print Ltd | Manufacturing | 2024 |
| Anytime Returns (UK) Ltd | Information & communication | 2021 |
| Apollo Fitness Studio Ltd | Arts & recreation | 2024 |
| Applegate Homes Limited | Construction | 2005 |
| Apunno Holding Ltd | Financial services | 2025 |
| Aquagem 1416 UK Ltd | Health & social care | 2015 |
| Arca Interior Design Ltd | Professional & scientific | 2024 |
| Archangel Consultancy Ltd | Financial services | 2023 |
| Archman Music Ltd | Arts & recreation | 2023 |
| Ardale Brown Properties ( Iver ) Ltd | Real estate | 2023 |
| Ardale Brown Properties Ltd | Real estate | 2018 |
| Arjank Limited | Information & communication | 2017 |
| Armoury FX Limited | Professional & scientific | 2011 |
| Aromalove London Limited | Wholesale & retail | 2016 |
| Arorsa Ltd | Information & communication | 2018 |
| Array Care Limited | Health & social care | 2025 |
| Array Care Properties Limited | Real estate | 2025 |
| Art in LV Limited | Arts & recreation | 2007 |
| AS Cement Ltd | Wholesale & retail | 2026 |
| AS Innovations Limited | Wholesale & retail | 2024 |
| ASB Blinds Limited | Manufacturing | 1996 |
| Ascent Investments Ltd | Real estate | 2019 |
| Asdj Services Limited | Construction | 2025 |
| ASH Mountain Films Limited | Information & communication | 2016 |
| ASK Enterprises PVT Limited | Wholesale & retail | 2015 |
| ASK Property Management Co Ltd | Real estate | 2021 |
| ASO & ZEN Properties Ltd | Real estate | 2023 |
| Aspire UP Ltd | Information & communication | 2023 |
| Aster K Limited | Information & communication | 2023 |
| Astons Electrical Limited | Construction | 2009 |
| AT8 Recovery & Service Ltd | Wholesale & retail | 2023 |
| Atiba UK Ltd | Construction | 2018 |
| ATM8 Ltd | Information & communication | 2026 |
| Atom Consulting Limited | Professional & scientific | 1999 |
| Attachment Dynamics Limited | Administrative & support | 2025 |
| Audio Integration Limited | Professional & scientific | 2025 |
| Aureon Enterprises Ltd | Administrative & support | 2026 |
| Auto City Trader Ltd | Wholesale & retail | 2021 |
| AV Professionals Ltd | Manufacturing | 2013 |
| Aviation Chauffeurs Ltd | Other services | 2011 |
| Axiom International Limited | Wholesale & retail | 2024 |
| Axis Air 2012 Ltd | Wholesale & retail | 2012 |
| Aylestones Estates Ltd | Real estate | 2020 |
| Aznostics Teleradiology Limited | Health & social care | 2022 |
| B Hartland Construction Ltd | Construction | 2023 |
| B.T.S.O. Born to Stand OUT Ltd | Wholesale & retail | 2018 |
| Badgequo Limited | Wholesale & retail | 1984 |
| Badial Properties Ltd | Real estate | 2025 |
| Bajwa UK Property Ltd | Real estate | 2023 |
| Balcomm Holdings Ltd | Professional & scientific | 2020 |
| Balcomm Limited | Professional & scientific | 1999 |
| Baobab Dormant Ltd. | Administrative & support | 2020 |
| Barr Services Limited | Administrative & support | 2025 |
| Base Safety Training Ltd | Education | 2021 |
| Bassman Developments Ltd | Construction | 2026 |
| BDF Brilliant Bikers Ltd | Information & communication | 2023 |
| BDF DWB Limited | Information & communication | 2022 |
| Beard and Guys Limited | Other services | 2024 |
| Beautycow Limited | Wholesale & retail | 2012 |
| Bedwell Crescent Ltd | Real estate | 2020 |
| BEE and Berrys Grooming Services Limited | Professional & scientific | 2021 |
| Beechwood Interiors & Spray Finishing Limited | Construction | 2025 |
| Beechwood Interiors (UK) Limited | Construction | 2014 |
| Benchtek Modular Systems Ltd | Manufacturing | 2020 |
| Benhetty Ltd | Other services | 2013 |
| Berial Ltd | Administrative & support | 2017 |
| Bespoke Bounce Events Ltd | Administrative & support | 2025 |
| Best Deal Products Ltd | Manufacturing | 2012 |
| Beyond Bespoke VIP Ltd | Wholesale & retail | 2024 |
| BEZ Trading Ltd | Transport & logistics | 2015 |
| Bhinder Properties Ltd | Real estate | 2019 |
| Bhinder Roofing Ltd | Construction | 2011 |
| Big Deal Films Limited | Arts & recreation | 2014 |
| Big Tree Holdco Ltd | Financial services | 2024 |
| Big Tree Holdings Ltd | Financial services | 2021 |
| Biobiz Ltd | Professional & scientific | 2023 |
| Birds Garage Limited | Wholesale & retail | 1954 |
| Birktech Projects Limited | Real estate | 2009 |
| Bishopsgate Windows & Doors Limited | Construction | 2014 |
| BK Specialists Ltd | Construction | 2020 |
| BKA Property Sourcing Ltd | Real estate | 2017 |
| Black Indigo Roofing Ltd | Construction | 2025 |
| Black Lion Records Ltd | Information & communication | 2020 |
| Black Swan Leisure Limited | Hospitality | 2009 |
| Bldex-Uk Limited | Construction | 2020 |
| Blei by Design Ltd | Professional & scientific | 2024 |
| Blig Limited | Information & communication | 2018 |
| Blue Infinity Limited | Real estate | 2005 |
| Blue Lion Haulage Limited | Transport & logistics | 2019 |
| Blue Ticks Logistics Limited | Transport & logistics | 2019 |
| Blueflame GAS & Heating Ltd | Construction | 2019 |
| BM Constructors Ltd | Construction | 2020 |
| Bointons Company Ltd | Real estate | 2018 |
| Bolesco Limited | Information & communication | 2021 |
| Box 2 Box Fitness Limited | Arts & recreation | 2016 |
| BP Pro Solutions Ltd | Construction | 2025 |
| Brains Ventures Ltd | Professional & scientific | 2025 |
| Bramleys Accountants Ltd | Professional & scientific | 2018 |
| Brana Consulting Ltd | Other services | 2013 |