| Automotive Development Consultants Limited | Professional & scientific | 2004 |
| Automotive Engineering Services Ltd | Professional & scientific | 2014 |
| Automotoboto Ltd | Wholesale & retail | 2023 |
| Auton Consulting Limited | Professional & scientific | 2025 |
| Auton Trading Limited | Wholesale & retail | 2024 |
| Autoway of Bedworth Limited | Transport & logistics | 1987 |
| AV Car Care Limited | Administrative & support | 2009 |
| Ava&Arthur Transport Ltd | Transport & logistics | 2025 |
| Avalanche Holdings Limited | Extraterritorial | 2017 |
| Avalco Limited | Wholesale & retail | 2002 |
| AVI Spedition Limited | Transport & logistics | 2019 |
| Aviation Technical Consultancy Limited | Transport & logistics | 2007 |
| Avon Green Logistics Ltd | Transport & logistics | 2022 |
| Avon Mews Management Company Limited | Households | 1997 |
| AVY DBM Ltd | Professional & scientific | 2025 |
| AW ARB Ltd | Agriculture & fishing | 2025 |
| AW Carhouse Limited | Wholesale & retail | 2015 |
| AW Event Management Ltd | Administrative & support | 2023 |
| Awake 52 Healthcare Solutions Ltd | Administrative & support | 2023 |
| Awan Services Group Limited | Construction | 2025 |
| AWG Property Investments Ltd | Real estate | 2023 |
| AX157 Ltd | Transport & logistics | 2024 |
| AXE Ventures Limited | Financial services | 2021 |
| Axiom Contracts Limited | Construction | 2002 |
| Axis Homes Limited | Construction | 2007 |
| Axle 1971 Limited | Extraterritorial | 2014 |
| Axpropertysolutions Ltd | Real estate | 2022 |
| Ayali Retail Limited | Wholesale & retail | 2025 |
| Aylestone Farms Limited | Agriculture & fishing | 1965 |
| Ayres Leisure Limited | Hospitality | 2013 |
| Aysha Trans Ltd | Transport & logistics | 2018 |
| Ayzel Kamran Limited | Wholesale & retail | 2024 |
| AZI Construction Ltd | Construction | 2020 |
| Azmm Properties Limited | Real estate | 2015 |
| Aztranspoters Limited | Transport & logistics | 2025 |
| B & B GAS, Plumbing and Heating Ltd | Construction | 2026 |
| B & B Inflatables Limited | Administrative & support | 2006 |
| B & K Accident Repair Centre Limited | Wholesale & retail | 2000 |
| B & M Commercial Units Ltd | Real estate | 2021 |
| B 4 Backpackers Travel Ltd | Administrative & support | 2024 |
| B B S Electrical Services Ltd | Construction | 2008 |
| B R Designer Ltd | Professional & scientific | 2025 |
| B&A Tyres Limited | Wholesale & retail | 2023 |
| B&B Promotions Ltd | Hospitality | 2024 |
| B&D Consultancy Specialists Limited | Real estate | 2021 |
| B&S Cleaning Expert Ltd | Administrative & support | 2025 |
| B&S Cleaning Group Ltd | Financial services | 2025 |
| B.B Landscapes Limited | Administrative & support | 2014 |
| B.C. Harrison & SON Ltd | Construction | 2026 |
| B.N.T. Properties Limited | Construction | 2002 |
| B24 Healthcare Solution Limited | Administrative & support | 2020 |
| Bach Construction Ltd | Construction | 2016 |
| BAD Management Ltd | Arts & recreation | 2024 |
| BAD Production Ltd | Arts & recreation | 2024 |
| BAG Food Ltd | Hospitality | 2024 |
| Baggs Ltd | Wholesale & retail | 2026 |
| Bagshaw Engineering Ltd | Manufacturing | 2021 |
| Bailey Business Solutions Ltd | Wholesale & retail | 2022 |
| Bailey Design and Manufacturing Limited | Professional & scientific | 2004 |
| BAL Trans Ltd | Transport & logistics | 2021 |
| Bala Grocery Ltd | Wholesale & retail | 2025 |
| Balance Wellbeing Club Ltd | Other services | 2026 |
| Balance Wellbeing Studio Ltd | Arts & recreation | 2026 |
| Balanced Family Centre Ltd | Health & social care | 2025 |
| Balcones Limited | Extraterritorial | 2012 |
| Balconst Limited | Construction | 2019 |
| Balloons 'N' Cards Limited | Wholesale & retail | 2012 |
| Balsall Carpets Limited | Wholesale & retail | 2017 |
| Baluga Properties Limited | Households | 2014 |
| Balukiewicz Transport Limited | Transport & logistics | 2014 |
| Bambolim Cross Ltd | Transport & logistics | 2024 |
| Bamboo Connections Ltd | Hospitality | 2017 |
| Banban Limited | Real estate | 2011 |
| Bang on Limited | Administrative & support | 2008 |
| Bankstone Construction Ltd | Construction | 2023 |
| Bar Advertising Europe Ltd | Professional & scientific | 2023 |
| Barbadium Ltd | Real estate | 2022 |
| Bareblade Ltd | Wholesale & retail | 2026 |
| Barebones Ltd | Wholesale & retail | 2023 |
| Bark N Ride Ltd | Households | 2025 |
| Barkat Halal Butchers Ltd | Wholesale & retail | 2021 |
| Barkat Holdings Limited | Real estate | 2015 |
| Barking Gecko Solutions Ltd | Professional & scientific | 2025 |
| Barleyfield HR Solutions Ltd | Professional & scientific | 2025 |
| Barnacles Restaurant Limited | Hospitality | 2023 |
| Barnes Construction (Midlands) Limited | Construction | 2008 |
| Baro Vehicles Ltd | Manufacturing | 2015 |
| Barrs Family Enterprises Limited | Construction | 2016 |
| Bartlams Contract Services Limited | Transport & logistics | 2014 |
| Bartlett's Automotive Solutions Ltd | Professional & scientific | 2025 |
| Barton Croft Properties Ltd | Real estate | 2025 |
| Barts Enterprises Limited | Transport & logistics | 2025 |
| Basco Investments Ltd | Real estate | 2023 |
| Baseman Limited | Real estate | 2016 |
| Bates Timber Merchants Limited | Manufacturing | 1994 |
| Bathams Tree Care Limited | Administrative & support | 2024 |
| Battleford Property Limited | Real estate | 2026 |
| Baumanis Ltd | Administrative & support | 2024 |
| Bavaria Transport Ltd | Transport & logistics | 2018 |
| BB Pressure Washers Ltd | Wholesale & retail | 2025 |