| Alfie's Fish & Chips Ltd | Hospitality | 2026 |
| Algar Fresh Food Shack Limited | Hospitality | 2024 |
| Algar Holdings (Kent) Limited | Financial services | 2025 |
| Algoedge Ltd | Information & communication | 2026 |
| ALI RAJ Tandoori Restaurant Ltd | Hospitality | 2017 |
| Alice Isaac Ltd | Arts & recreation | 2025 |
| ALL About Telecoms Ltd | Information & communication | 2008 |
| ALL Green Electrical Ltd | Construction | 2025 |
| ALL Plumbing and Electrical Solutions Ltd | Construction | 2020 |
| Allan Portsmouth GUN Engraving Ltd | Other services | 2007 |
| Alma House (Swanscombe) Limited | Real estate | 2018 |
| ALT Marketing Group Ltd | Professional & scientific | 2019 |
| Always Blue Ltd | Professional & scientific | 2021 |
| Alxn Limited | Information & communication | 2025 |
| Amadeus Trattoria Mediterranea Ltd | Hospitality | 2020 |
| Amami Limited | Wholesale & retail | 2022 |
| Amarro Ltd | Wholesale & retail | 2023 |
| Amble Dogs Ltd | Other services | 2022 |
| Ambulearn Limited | Education | 2023 |
| AML Golf Ltd | Information & communication | 2012 |
| Amora Cafe Ltd | Hospitality | 2018 |
| Anahata Trading Ltd | Professional & scientific | 2014 |
| Analogue LAB Ltd | Wholesale & retail | 2025 |
| Anamorphic Limited | Professional & scientific | 2018 |
| Anarchitecture Fabrications Ltd | Arts & recreation | 2020 |
| Anchor Properties U.K Ltd | Real estate | 2025 |
| Andemma Limited | Professional & scientific | 2012 |
| Anderson & Carter Solutions Ltd | Hospitality | 2025 |
| Andreas Learning Ltd | Education | 2024 |
| Andrew Butler Insignia Limited | Other services | 2003 |
| Andrews Beer & Mineral Company Limited | Wholesale & retail | 2006 |
| Andy Bees Metal Management Limited | Water & waste | 2024 |
| Andy Bees Waste Management Limited | Water & waste | 2024 |
| Andy Potts Limited | Arts & recreation | 2007 |
| Andy's Auto Restorations Limited | Wholesale & retail | 2018 |
| Angel Cleaning Services Ltd | Administrative & support | 2025 |
| Angela Turpin Costs Limited | Professional & scientific | 2014 |
| Angelzlyt Ltd | Public administration | 2025 |
| Animal Magic Pets Limited | Wholesale & retail | 2010 |
| Animal Rehab Conference UK Ltd | Administrative & support | 2026 |
| Animate & Create Studios Limited | Arts & recreation | 2010 |
| Anisah Ltd | Information & communication | 2018 |
| Anonymous Studio Ltd | Professional & scientific | 2021 |
| Another Universe Ltd | Information & communication | 2026 |
| Ansali Ltd | Other services | 2018 |
| Antares for Water & Fire Limited | Administrative & support | 2009 |
| AOC ENG UK Limited | Energy | 2025 |
| Aopd Ltd | Transport & logistics | 2021 |
| AP3X Property One Ltd | Real estate | 2026 |
| Apcomms Ltd | Information & communication | 2023 |
| APE Property Ltd | Construction | 2023 |
| APE Vibe Ltd | Information & communication | 2025 |
| Apex Cleaning Group Ltd | Administrative & support | 2025 |
| Apex Student Recruits Limited | Education | 2024 |
| Apex Timber Construction Ltd | Construction | 2025 |
| Apllom Limited | Information & communication | 2021 |
| APM Civil Consultants Ltd | Construction | 2023 |
| Apollo Animal Physiotherapy Ltd | Agriculture & fishing | 2024 |
| Apparel, Coffee and Barbers Ltd | Wholesale & retail | 2025 |
| Applied Science Technology Limited | Professional & scientific | 2014 |
| Appreciation Project Ltd | Wholesale & retail | 2020 |
| Approved Car and Commercial Ltd | Wholesale & retail | 2026 |
| Approved Commercial Group Ltd | Wholesale & retail | 2025 |
| Approved Commercial Parts Ltd | Wholesale & retail | 2025 |
| Aquaman Cleaning Limited | Administrative & support | 2018 |
| Aquarius Plumbing & Heating Kent Limited | Construction | 2014 |
| Aquarius Wholesale Limited | Wholesale & retail | 2022 |
| Archie Mcfarlane Limited | Construction | 2014 |
| Architectural Vision Systems Group Limited | Construction | 2021 |
| Architectural Vision Systems Limited | Manufacturing | 2011 |
| Areia Capital Ltd | Financial services | 2026 |
| Arista Cosmetics Ltd | Wholesale & retail | 2019 |
| Arklow Property Consultants Limited | Real estate | 2009 |
| Aroma Kitchen Ltd | Hospitality | 2025 |
| Artemis Recruitment Consultants Limited | Administrative & support | 2015 |
| Arthur (Cwhg) Ltd | Real estate | 2023 |
| Artisans and Adventurers Ltd | Wholesale & retail | 2017 |
| Arts Cool Ltd | Arts & recreation | 2017 |
| Arul & Vino Property Limited | Real estate | 2023 |
| Ascent Strategy Partners Ltd | Professional & scientific | 2026 |
| ASD Games Limited | Wholesale & retail | 2025 |
| ASF Construction Ltd | Construction | 2024 |
| Ashman Building and Property Ltd | Construction | 2023 |
| Asier Building Control Limited | Professional & scientific | 2024 |
| Asmandes Acquisitions Ltd | Real estate | 2025 |
| Asmandes Ltd | Administrative & support | 2024 |
| Asmandes Projects Ltd | Construction | 2025 |
| Asobi Store Ltd | Wholesale & retail | 2025 |
| Aspendos Dymchurch Ltd | Administrative & support | 2017 |
| Aspendos Hawkinge Ltd | Hospitality | 2006 |
| Assured Contacts Ltd | Information & communication | 2025 |
| Aston Walker Funeral Directors Ltd | Other services | 2021 |
| Astoria Cigars Ltd | Wholesale & retail | 2024 |
| AT Mechanical Services Ltd | Construction | 2020 |
| Athol Lodge Management Company Limited | Households | 2009 |
| Atlas Secure Limited | Administrative & support | 2017 |
| Atomeka Ltd | Information & communication | 2025 |
| Attender Ltd | Information & communication | 2018 |
| AU51ENZ Ltd | Financial services | 2018 |
| Audio Wallpaper Limited | Information & communication | 2018 |