| 102320 Limited | Financial services | 2020 |
| 11.11 Yoga Studio Ltd | Arts & recreation | 2019 |
| 12 Twelve Ltd | Real estate | 2019 |
| 121 the Pippin Management Limited | Households | 2017 |
| 12DW Investments Ltd | Real estate | 2024 |
| 12DW Properties Ltd | Hospitality | 2024 |
| 12DW Property Group Ltd | Financial services | 2024 |
| 1ST Choice Build and Groundworks Ltd | Transport & logistics | 2017 |
| 1ST Choice Lifts Ltd | Extraterritorial | 2012 |
| 1ST Choice Stairlifts Limited | Wholesale & retail | 2004 |
| 22 Brayburne Avenue Management Company Limited | Professional & scientific | 2002 |
| 25 Burlington Road Management Limited | Households | 1978 |
| 3A Services Limited | Wholesale & retail | 2017 |
| 3D Maintenance Solutions Ltd | Construction | 2008 |
| 4 Cinnaminta Ltd | Real estate | 2021 |
| 4C'S Consulting Limited | Information & communication | 2006 |
| 4WD Equine Ltd | Agriculture & fishing | 2025 |
| 54 Stubbington AVE Freehold Ltd | Real estate | 2023 |
| 79 Degrees Ltd | Professional & scientific | 2024 |
| 7ORTFOLIO Ltd | Real estate | 2020 |
| 82 Group Ltd | Financial services | 2021 |
| 82 Investments Ltd | Real estate | 2021 |
| A & G Accommodation Limited | Real estate | 2024 |
| A & L Tiles Online Ltd | Wholesale & retail | 2023 |
| A E R Rowe Financial Consulting Limited | Professional & scientific | 2016 |
| A Gentleman's Barber Ltd | Other services | 2009 |
| A Simpkins Limited | Construction | 2009 |
| A&Mc Investment Ltd | Real estate | 2022 |
| A1 Electrics and Construction Limited | Construction | 2025 |
| A4 Farmers Limited | Agriculture & fishing | 2017 |
| A4 Storage Limited | Transport & logistics | 2025 |
| AA Sourcing Ltd | Real estate | 2020 |
| Abc&T Ltd | Professional & scientific | 2023 |
| Able Tree and Landscapes Ltd | Administrative & support | 2022 |
| Abme Electrical Limited | Construction | 2011 |
| Abtl Property Ltd | Real estate | 2025 |
| Abull Limited | Hospitality | 2026 |
| Acanthus Accountancy Limited | Professional & scientific | 2008 |
| ACC Associates Limited | Financial services | 2006 |
| Accurantur Limited | Information & communication | 2016 |
| Ace Holidays Spain Ltd | Administrative & support | 2022 |
| Acropolis Technical Group Limited | Extraterritorial | 2023 |
| Active Potential Therapy Limited | Professional & scientific | 2015 |
| Adom Shipping Logistics Limited | Other services | 2017 |
| Adzuga Limited | Real estate | 2021 |
| AEP Drylining Ltd | Construction | 2024 |
| Affleck & Major Ltd | Real estate | 2020 |
| Agency Payroll Solutions Ltd | Extraterritorial | 2005 |
| Agile Resilience Limited | Professional & scientific | 2018 |
| Agrc Retail Ltd | Wholesale & retail | 2025 |
| Agricultural Technology (Middle East) Company Limited | Professional & scientific | 2008 |
| Ahead Electrical Limited | Construction | 2025 |
| AI Launchpad Limited | Professional & scientific | 2025 |
| AI Sentry Ltd | Information & communication | 2024 |
| Ailbe Homes Ltd | Real estate | 2019 |
| Ailbe Investments Ltd | Real estate | 2022 |
| Aird Assets Ltd | Real estate | 2025 |
| Airgotek Limited | Information & communication | 2013 |
| Ajmer Spice Ltd | Hospitality | 2023 |
| AK24 Investments Ltd | Real estate | 2022 |
| Aldbourne Beer Club Limited | Hospitality | 2024 |
| Aldham Estates Limited | Construction | 2025 |
| Alex Oliver Associates Limited | Real estate | 2000 |
| Aligned Business Coaching Ltd | Professional & scientific | 2013 |
| ALL Compliant Roofing Group Ltd | Construction | 2022 |
| ALL Star Accounting Ltd | Professional & scientific | 2018 |
| Altex Engineering Limited | Manufacturing | 1982 |
| Altex Limited | Extraterritorial | 2006 |
| Alvis Properties Ltd | Real estate | 2023 |
| AM Calne Barbers Limited | Other services | 2024 |
| Amalgamate Property Investments Ltd | Hospitality | 2019 |
| Amara Portfolio Ltd | Financial services | 2023 |
| Amara Property SPV Limited | Real estate | 2021 |
| AMD Property Maintenance Ltd | Construction | 2021 |
| Ammn Properties Limited | Real estate | 2017 |
| Analysis and Solutions Ltd | Information & communication | 2011 |
| Ancient Passes Ltd | Administrative & support | 2026 |
| Andrecruit Group Ltd | Administrative & support | 2023 |
| Andromachus Ltd | Real estate | 2023 |
| Andy Bell Ltd | Administrative & support | 2024 |
| Andy Packer Consultancy Ltd | Education | 2014 |
| Anka Properties Ltd | Real estate | 2020 |
| Ansema Ltd | Professional & scientific | 2026 |
| Anttzchiro Ltd | Health & social care | 2019 |
| APC Antiques & Collectables Ltd | Wholesale & retail | 2020 |
| APL Building Projects Ltd | Construction | 2025 |
| APL Projects Ltd | Real estate | 2019 |
| APL Syndicate Group Ltd | Financial services | 2025 |
| Aprille Denton Consulting Limited | Professional & scientific | 2017 |
| APS Woodwork Ltd | Manufacturing | 2013 |
| Aqualetes Ltd | Extraterritorial | 2013 |
| Archibold Limited | Construction | 2019 |
| Archie the Alchemist Bar Ltd | Hospitality | 2025 |
| Arkony Developments Ltd | Real estate | 2025 |
| Art Stuff Ltd | Extraterritorial | 2009 |
| Artecontracta Ltd | Professional & scientific | 2015 |
| Ashdown Property Group Ltd | Real estate | 2020 |
| Aspen Blue Limited | Information & communication | 2011 |
| Asset Investor Partners Limited | Real estate | 2024 |
| Athelstan Professional Services (Wessex) LLP | | 2023 |