| Aston Flamville Properties Limited | Construction | 2012 |
| ATM Logistics Ltd | Extraterritorial | 2010 |
| ATN Contractors Limited | Construction | 2013 |
| Attempero Limited | Information & communication | 2017 |
| August Property Ltd | Real estate | 2024 |
| Authentic Halal Ltd | Professional & scientific | 2015 |
| Autism Detect Ltd | Health & social care | 2024 |
| Autoglow Plus Ltd | Wholesale & retail | 2025 |
| Automan Innovations Limited | Professional & scientific | 2022 |
| Automatic Refreshments (Midlands) Ltd | Hospitality | 2007 |
| Automatic Refreshments (South) Ltd | Hospitality | 2007 |
| Automatic Refreshments Limited | Hospitality | 2010 |
| Automotive Transport Training Limited | Administrative & support | 1994 |
| Autowash Engineering Limited | Manufacturing | 1973 |
| Autowash Engineering Services Limited | Extraterritorial | 2002 |
| Autowash Holdings Limited | Financial services | 2002 |
| Autumn James Property Rental Limited | Real estate | 2025 |
| AVA Knit (G.B.) Limited | Manufacturing | 1971 |
| Available Transport (Leicester) Ltd | Transport & logistics | 2019 |
| Avalanche Apparel Limited | Wholesale & retail | 2023 |
| Avex Multiroom & Home Cinema Technology Ltd | Wholesale & retail | 2010 |
| AVH Group Limited | Professional & scientific | 2019 |
| AVI Nature Ltd | Extraterritorial | 2022 |
| Aviation Hardware Consultants Ltd | Wholesale & retail | 2018 |
| AVM Homes Limited | Real estate | 2021 |
| AVM Professionals Ltd | Information & communication | 2020 |
| Avon Programme Management Limited | Information & communication | 2012 |
| AW Knitwear Limited | Financial services | 2024 |
| Award Vehicle Sales Limited | Wholesale & retail | 2022 |
| AWH Properties Ltd | Real estate | 2021 |
| Axis Advisory Ltd | Administrative & support | 2025 |
| Axis Holidays Private Limited | Administrative & support | 2023 |
| Axisplus Ltd | Wholesale & retail | 2024 |
| AXP1212 Ltd | Other services | 2025 |
| AZI384 Limited | Real estate | 2024 |
| Azza Group Ltd | Financial services | 2020 |
| B & O Investments Limited | Professional & scientific | 2018 |
| B & R White Ltd | Water & waste | 2011 |
| B Joshi Limited | Wholesale & retail | 2003 |
| B&R White Properties Ltd | Financial services | 2023 |
| B. Slaney Limited | Professional & scientific | 1959 |
| B.Lewis Associates Ltd | Manufacturing | 2008 |
| Baby Products Ltd | Wholesale & retail | 2023 |
| BAC Fabrications & Construction Limited | Manufacturing | 2015 |
| BAC Welding Ltd | Manufacturing | 2023 |
| BACK2UK Ltd | Transport & logistics | 2021 |
| Bailey & Griffiths Holdings Limited | Professional & scientific | 2019 |
| Bailey & Griffiths Limited | Professional & scientific | 2010 |
| Bailey Finance Ltd | Financial services | 2019 |
| Bailey-English Studio Ltd | Construction | 2015 |
| Baines Electrical Installations Ltd | Construction | 2022 |
| Baker & Stuart Associates Ltd | Professional & scientific | 2023 |
| Balance Therapy Limited | Other services | 2022 |
| Balc Limited | Administrative & support | 2019 |
| Baldwin Brothers Property Ltd | Real estate | 2018 |
| Balkans United Limited | Transport & logistics | 2018 |
| Ballard Property Ltd | Real estate | 2014 |
| Ballet Theatre UK Limited | Arts & recreation | 2009 |
| Balti RAJ Hinckley Ltd | Hospitality | 2024 |
| Barefoot K9 UK Limited | Administrative & support | 2025 |
| Barefoot Sunday Limited | Other services | 2019 |
| Barkby Road Residents Management Company Limited | Households | 2025 |
| Barkers Accountants Limited | Professional & scientific | 2011 |
| Barnacle Home Finance Limited | Financial services | 2009 |
| Barwell Youth Band Limited | Arts & recreation | 2020 |
| Base Accounting Ltd | Professional & scientific | 2007 |
| Base Club Holding Ltd | Financial services | 2026 |
| Base London International Limited | Wholesale & retail | 1999 |
| Base London Limited | Wholesale & retail | 1995 |
| Base Powerlifting Club Ltd | Arts & recreation | 2026 |
| Base Training Club Ltd | Arts & recreation | 2025 |
| Baseleys Transport Ltd | Transport & logistics | 2021 |
| Basic Translators Ltd | Education | 2021 |
| Basildon Sporting Village Limited | Arts & recreation | 2009 |
| Batho Sports Cars Ltd | Manufacturing | 2016 |
| Baton Rouge @ 41 Limited | Hospitality | 2023 |
| Battling Brook Limited | Information & communication | 2009 |
| Battling Brook Primary School | Education | 2013 |
| BB Commercial Finance Limited | Financial services | 2020 |
| BB Engineering Supplies Ltd. | Wholesale & retail | 2011 |
| BC Cleaning Services Ltd | Administrative & support | 2020 |
| BCC (Burbage) Ltd | Construction | 2018 |
| BCR84 Ltd | Transport & logistics | 2024 |
| BDS Building Landscaping Services Ltd | Construction | 2024 |
| Beamhill Heights Management Company Limited | Households | 2020 |
| Beardofthedeadman Ltd | Wholesale & retail | 2026 |
| Beaumanor Industrial Supply Co. Limited | Extraterritorial | 1998 |
| Beaumont Developments Midlands Limited | Construction | 2016 |
| Beauty Conscience Ltd | Other services | 2017 |
| Beaver BUS Limited | Transport & logistics | 2007 |
| Beckys Choice Ltd | Wholesale & retail | 2025 |
| Bedworth Heating and Plumbing Supplies Ltd | Construction | 2004 |
| Beeby & Smart Limited | Financial services | 2014 |
| Beltic Ltd | Transport & logistics | 2019 |
| BEM Enterprise's Limited | Hospitality | 2023 |
| BEN Coffee Co Ltd | Professional & scientific | 2015 |
| Bennett Family Properties Limited | Real estate | 2022 |
| Bentley & Biddle Holdings Limited | Financial services | 2026 |
| Bentley & Biddle Limited | Wholesale & retail | 2025 |
| Bentley Partnership Ltd | Real estate | 2022 |