| !Obac UK Limited | Professional & scientific | 2011 |
| 1CORE Electrical Solutions Ltd | Construction | 2023 |
| 2 Build Exhibitions Limited | Administrative & support | 2009 |
| 2 Colemans Construction Ltd | Construction | 2025 |
| 27 North Consulting Limited | Financial services | 2023 |
| 3 D a Ltd | Arts & recreation | 2002 |
| 363 Electrical Ltd | Construction | 2025 |
| 37 Greyhound Road (Freehold) Limited | Households | 2024 |
| 3LINKS Consultancy Limited | Administrative & support | 2009 |
| 82 Loftus Road Limited | Real estate | 2016 |
| 88 Owlsmoor Road Ltd | Households | 2017 |
| @Software PLC | Professional & scientific | 1999 |
| A Blank Slate Design Ltd | Professional & scientific | 2022 |
| A C Building and Maintenance Limited | Construction | 2013 |
| A Welsh Motors UK Ltd | Wholesale & retail | 2012 |
| A&A Express Limited | Wholesale & retail | 2024 |
| A&P Private Hire Ltd | Transport & logistics | 2016 |
| A.M.S. Applied Micro Systems Limited | Wholesale & retail | 1992 |
| A1 Vehicle Components Ltd | Wholesale & retail | 2021 |
| A5AUTO Ltd | Wholesale & retail | 2018 |
| AAH Holdings Ltd | Real estate | 2024 |
| Aarray Sports (UK) Limited | Information & communication | 2021 |
| Abbystopshop Ltd | Wholesale & retail | 2025 |
| Aclind Limited | Professional & scientific | 1982 |
| Adams Agricultural Limited | Agriculture & fishing | 2019 |
| Added Dimension Events Holdings Limited | Financial services | 2005 |
| Added Dimension Events Limited | Administrative & support | 1995 |
| Admac Grip Services Limited | Professional & scientific | 2006 |
| Admit Consultancy Ltd | Information & communication | 2014 |
| Advanced Climate Technical Services Ltd. | Energy | 2018 |
| ADW Associates Ltd | Professional & scientific | 2014 |
| Affilicoms Ltd | Professional & scientific | 2011 |
| Agya Chakra Limited | Financial services | 2023 |
| AHS Electrical Services Ltd | Construction | 2015 |
| AI Human Consultancy Limited | Information & communication | 2025 |
| AJ Anderson Property Ltd | Real estate | 2022 |
| AJR Office Interiors Limited | Construction | 2003 |
| Ak&Y Limited | Hospitality | 2025 |
| Aktt Trainers & Assessors Ltd | Education | 2021 |
| Albayrak Investment Limited | Real estate | 2025 |
| Alder Road Practice Ltd | Health & social care | 2018 |
| Alphom Ltd | Professional & scientific | 2013 |
| AM & Properties Ltd | Real estate | 2023 |
| AM Shutters Ltd | Construction | 2019 |
| Ambrose Racing Club Ltd | Arts & recreation | 2024 |
| Amlot Group Limited | Other services | 2024 |
| Ammonite Consultants Ltd | Information & communication | 2025 |
| Amruta Patwardhan Ltd | Health & social care | 2016 |
| Andrew Cameron Ltd. | Information & communication | 2000 |
| Aphex Events Ltd | Arts & recreation | 2023 |
| Aplus Access Ltd | Administrative & support | 2020 |
| APM 51 Limited | Wholesale & retail | 2022 |
| Appy Tech Development Ltd | Information & communication | 2024 |
| Aquarius Exterior Cleaning Services Ltd | Administrative & support | 2026 |
| Ar&M Consulting Limited | Professional & scientific | 2014 |
| Arbel Advertising Limited | Professional & scientific | 2024 |
| Arbtruck Limited | Extraterritorial | 2006 |
| Ares Marketing 2010 Ltd | Construction | 2013 |
| Aretha Phoenix Business Support Limited | Professional & scientific | 2018 |
| Art in Smile Laboratory Limited | Administrative & support | 2017 |
| Asbl Investments Ltd | Hospitality | 2023 |
| Asbl Leisure Limited | Administrative & support | 2013 |
| ASH Brook Independent Funeral Directors Limited | Health & social care | 2013 |
| Ashtree Solutions Limited | Construction | 2022 |
| Aspects of Fitness Limited | Arts & recreation | 2003 |
| Associated Training Services (ATS) Ltd | Education | 2021 |
| Associated Utility Services Ltd | Information & communication | 2024 |
| Astramerix Ltd | Administrative & support | 2007 |
| AT Engineering Technology Ltd | Manufacturing | 2016 |
| ATS Construction & Highways Training Ltd | Education | 2021 |
| ATS Group Holdings Ltd | Financial services | 2023 |
| Attoe Aesthetics Limited | Health & social care | 2021 |
| ATZ Electrical Ltd | Construction | 2022 |
| Autospray Ltd | Wholesale & retail | 2015 |
| Avanti Power Repairs Limited | Other services | 1996 |
| Avizia Limited | Information & communication | 2012 |
| B.A.M. Invest Ltd | Financial services | 2022 |
| BA Specialist Comms Ltd | Information & communication | 2018 |
| Bale Properties Limited | Real estate | 2024 |
| Balloons for U Ltd | Wholesale & retail | 2006 |
| Baltec (U.K.) Limited | Manufacturing | 1986 |
| Barly Property Limited | Construction | 2019 |
| Barringtons Properties Ltd | Real estate | 2019 |
| Basingstoke Softeners Limited | Households | 2003 |
| Batchleague Limited | Construction | 1996 |
| BE Safety Solutions Ltd | Construction | 2019 |
| Bean Machine Express Ltd | Manufacturing | 2025 |
| Beaurepaire Advisers Limited | Professional & scientific | 2015 |
| Beech Copse Management Baughurst Limited | Real estate | 2003 |
| Beechgreen Property Trust Limited | Real estate | 1992 |
| BEN Wheeler Pianos Limited | Wholesale & retail | 2004 |
| Benjamin Stuart Photography Limited | Professional & scientific | 2015 |
| Berkham Renovation & Construction Ltd | Construction | 2021 |
| Berkshire Gutters Ltd | Construction | 2023 |
| Better Basket Retail Ltd | Wholesale & retail | 2023 |
| Beyond the Grapevine Limited | Information & communication | 2024 |
| Bikefit LAB Ltd | Arts & recreation | 2026 |
| Birch Brook Foods Limited | Hospitality | 2025 |
| Black Carbon Technologies Ltd | Information & communication | 2021 |
| Black Rosy Ltd | Administrative & support | 2011 |