| Anglia Fixing Ltd. | Manufacturing | 1994 |
| Anglia Hose & Hydraulics Ltd | Professional & scientific | 2010 |
| Anglian Craftsmen Limited | Construction | 2010 |
| Another Way of Living Ltd | Wholesale & retail | 2020 |
| Anouk Fashion Limited | Wholesale & retail | 2010 |
| Antenna Boutique Ltd | Information & communication | 2019 |
| Antler Properties Europe Limited | Construction | 2000 |
| Apdac Commerce Ltd | Construction | 2015 |
| Apex Plastering & Decorating Ltd | Construction | 2025 |
| APL Heating Solutions Limited | Construction | 2018 |
| Apprenticeship Assessment Ltd | Education | 2015 |
| Aqualab Ltd | Information & communication | 2023 |
| Aquatic Fanatics Limited | Extraterritorial | 2017 |
| AR Heating Ltd | Construction | 2022 |
| AR Wheelcare Limited | Wholesale & retail | 2011 |
| Arach Solutions Ltd | Information & communication | 2018 |
| ARB Asset Capital Ltd | Financial services | 2026 |
| ARB Investments Ltd | Financial services | 2023 |
| Archer Accommodation Ltd | Real estate | 2024 |
| Archer Estate Management Ltd | Real estate | 2023 |
| Architects for Health | Professional & scientific | 2017 |
| Argent Street "G" Management Company Limited | Real estate | 1987 |
| Argento Capital Markets Limited | Financial services | 2012 |
| Artac Group Limited | Real estate | 1976 |
| ASD Enforcement Services Ltd | Administrative & support | 2021 |
| ASH Associates Limited | Information & communication | 2005 |
| Ashbourne Building Services Ltd | Construction | 2021 |
| Ashley Bishop Coaching Ltd | Arts & recreation | 2014 |
| Ashley Sutton Racing Limited | Arts & recreation | 2013 |
| Ashwood Refurbishments Limited | Construction | 2000 |
| Aslett & Broadberry Ltd | Real estate | 2026 |
| Aspers Limited | Real estate | 2020 |
| Aspire Building Contracts Limited | Construction | 2015 |
| Assured Fire Solutions Limited | Extraterritorial | 2009 |
| Aston Rowe Ltd | Professional & scientific | 2025 |
| Astor and Windsor International Limited | Manufacturing | 2005 |
| AT Twenty Five Limited | Hospitality | 2019 |
| Atay Global Limited | Wholesale & retail | 2005 |
| Atay Holding Limited | Financial services | 2024 |
| Athena Architectural Services Limited | Professional & scientific | 2017 |
| Atlantic Accelerator Limited | Professional & scientific | 2010 |
| Atlantic Clinica Limited | Professional & scientific | 2007 |
| Auto Trading International Ltd | Wholesale & retail | 2022 |
| Auximeca Limited | Construction | 2004 |
| AVG Medical Properties Limited | Real estate | 2012 |
| Avia Index Limited | Information & communication | 2025 |
| Avsidya Products Limited | Information & communication | 2006 |
| AW Technologies Ltd | Information & communication | 2019 |
| Awareness Matters Ltd | Education | 2015 |
| Axis Creative Studio Ltd | Wholesale & retail | 2025 |
| Aztec Specialist Brickwork Ltd | Construction | 2023 |
| B & W Trading Co Ltd | Hospitality | 2026 |
| B Flooring Ltd | Construction | 2023 |
| B L J Contracts Limited | Administrative & support | 2014 |
| B Napnest Ltd | Manufacturing | 2025 |
| B P Windows Limited | Construction | 2007 |
| B.N.O.S. Meditech Limited | Manufacturing | 1989 |
| B.W. Whiffin & Co Ltd | Professional & scientific | 2012 |
| Baba MAA Enterprise Limited | Hospitality | 2018 |
| Babies R US (London) Limited | Wholesale & retail | 2018 |
| Babyopathy Limited | Administrative & support | 2014 |
| Baconsosteopathy Limited | Public administration | 2020 |
| Bailey Court Management Company Limited | Households | 1962 |
| Bailey Interiors Limited | Other services | 2024 |
| Bailey Q Limited | Wholesale & retail | 2025 |
| Baines Cutler Solutions Ltd | Professional & scientific | 2013 |
| Baja Holdings Limited | Real estate | 2026 |
| Baker & Baker Furniture Limited | Manufacturing | 2003 |
| Baldwins of Halstead Limited | Wholesale & retail | 2021 |
| Bandsawblades.Co.Uk Limited | Wholesale & retail | 2016 |
| Banstead Interiors Limited | Construction | 2011 |
| Banstreets Management Ltd | Households | 2020 |
| Bar Restaurant International Ltd | Hospitality | 2023 |
| Barly Foods Limited | Wholesale & retail | 2023 |
| Barnfield (Brickwall Farm) Ltd | Real estate | 2023 |
| Barton Friars (Chigwell) Management Company Limited | Households | 1988 |
| Basingstoke Autocentre Limited | Wholesale & retail | 2004 |
| Basingstoke MOT & Tyre Centre - Wade Road - Limited | Wholesale & retail | 2008 |
| Basingstoke MOT & Tyre Ltd | Wholesale & retail | 2006 |
| Basingstoke Property Holdings Ltd | Real estate | 2024 |
| Basingstoke Value Tyres Limited | Wholesale & retail | 2011 |
| Baythorne Hall Limited | Wholesale & retail | 2014 |
| BDB BX Limited | Real estate | 2022 |
| Beagrie Co Limited | Construction | 2007 |
| Beagrie Homes Limited | Extraterritorial | 2024 |
| Beagrie Properties Limited | Real estate | 2022 |
| Beautiglow Ltd | Other services | 2022 |
| Bedford Motor Company Limited | Wholesale & retail | 2004 |
| Beds ARE Uzzz Online Limited | Wholesale & retail | 2014 |
| Beeblebrox & Heart of Gold Investments Ltd | Real estate | 2023 |
| Bellot Developments Limited | Real estate | 2022 |
| Belvedere Developments Group Limited | Construction | 2021 |
| Belvedere Developments Limited | Construction | 2017 |
| BEN & Ella's FS Limited | Wholesale & retail | 2018 |
| Benjaminsfeast.Com Limited | Public administration | 2025 |
| Benson Gardening Limited | Administrative & support | 2003 |
| Bert Pickford Properites Limited | Real estate | 2024 |
| Bespoke Glass Design Limited | Manufacturing | 2005 |
| Bespoke Glass Interiors Limited | Manufacturing | 2020 |
| Bespoke Reporting Services Ltd | Information & communication | 2024 |