| Arleve Ltd | Wholesale & retail | 2022 |
| Arlo Women Ltd | Manufacturing | 2024 |
| ARM Construction Consultants Limited | Professional & scientific | 2014 |
| Armof Limited | Health & social care | 2004 |
| Armoni Music Limited | Professional & scientific | 2020 |
| Armstrong CQV Ltd | Professional & scientific | 2018 |
| Arnawaz Limited | Real estate | 2025 |
| Arncliffe Limited | Real estate | 2017 |
| Arnold & Arnold Ltd | Construction | 2014 |
| Arnold Dyslexia Services Ltd | Professional & scientific | 2023 |
| Arnold Frank Limited | Transport & logistics | 2015 |
| Arnold Tarmac Limited | Construction | 2006 |
| Aroano Ltd | Transport & logistics | 2026 |
| Aroaro Ltd | Transport & logistics | 2024 |
| Aromata Research Group Ltd | Professional & scientific | 2025 |
| Arrowsmith Consultants Limited | Financial services | 2016 |
| Art & AUR Property Ltd | Real estate | 2021 |
| Art Garnett Limited | Professional & scientific | 2007 |
| Art Property Investments Limited | Real estate | 2015 |
| Art Smile and Beauty Ltd | Education | 2015 |
| Art-Decor (Kent) Ltd | Construction | 2005 |
| Artcraftmers Ltd | Information & communication | 2024 |
| Artemis Greek Ltd | Hospitality | 2019 |
| Arthur's Development Ltd | Professional & scientific | 2021 |
| Article 27 Representation (UK) Limited | Information & communication | 2019 |
| Article 37 (Data Protection Officer) Services (UK) Limited | Information & communication | 2019 |
| ARTICUL8 Ltd | Education | 2025 |
| Artificially Educated Ltd | Education | 2025 |
| Artillery Rigging Ltd | Construction | 2022 |
| Artisan Auto Finish Ltd | Construction | 2021 |
| Artisan Bride Limited | Wholesale & retail | 2023 |
| Arton Home Services Ltd | Construction | 2023 |
| Arton Plumbing & Heating Ltd | Construction | 2019 |
| Artsci Leaders Labs Ltd | Professional & scientific | 2025 |
| Aruci South East Ltd | Construction | 2023 |
| Arun Enterprises Ltd | Wholesale & retail | 2021 |
| Arun Green Clinics Limited | Health & social care | 2025 |
| Arun Legal Services Limited | Professional & scientific | 2019 |
| ARW Reinforcing & Construction Limited | Administrative & support | 2002 |
| AS Catering Maidstone Ltd | Hospitality | 2019 |
| AS Much AS Possible Ltd | Wholesale & retail | 2024 |
| As&I Consulting Ltd | Information & communication | 2017 |
| As&I Ltd | Real estate | 2014 |
| As&Sa Ltd | Wholesale & retail | 2021 |
| ASA Team Limited | Other services | 2019 |
| Asaah Global Wellness Ltd | Health & social care | 2025 |
| Asal Property Services Limited | Hospitality | 2026 |
| ASB Pro Events Ltd | Professional & scientific | 2019 |
| Asbestos Kent Ltd | Construction | 2025 |
| ASC Mobile Mechanic Ltd | Wholesale & retail | 2025 |
| Ascend Keyboards Limited | Wholesale & retail | 2022 |
| Ascendiente Limited | Professional & scientific | 2021 |
| Ascension Mortgages and Protection Ltd | Financial services | 2020 |
| Ascent Events Limited | Hospitality | 2011 |
| Ascentrix Limited | Financial services | 2015 |
| Ascreative Limited | Professional & scientific | 2007 |
| Asdl UK Limited | Other services | 2018 |
| Asds Developments Ltd | Construction | 2019 |
| Asfalis Safety Ltd | Administrative & support | 2013 |
| Asgard Site Works Limited | Extraterritorial | 2022 |
| Asgard Tyres Ltd | Wholesale & retail | 2026 |
| ASH Electronics & Security Ltd | Manufacturing | 2022 |
| ASH Print Limited | Manufacturing | 2015 |
| ASH Woodward Ltd | Real estate | 2023 |
| Ashbeck TD Investments Ltd | Financial services | 2025 |
| Ashden Holdings Limited | Financial services | 2023 |
| Ashdia Limited | Professional & scientific | 2021 |
| Ashdown Property Company Limited | Real estate | 2019 |
| Ashdown Property Management and Lettings Limited | Real estate | 2026 |
| Ashenden Property LLP | | 2013 |
| Asher Holdings Ltd | Real estate | 2014 |
| Ashford Drive 21-25 Management Limited | Households | 2018 |
| Ashford Florist Limited | Extraterritorial | 2023 |
| Ashford Rural Medical Services Limited | Health & social care | 2014 |
| Ashley Court Management (Yiewsley) Limited | Households | 1996 |
| Ashley James Building Consultants Limited | Construction | 2022 |
| Ashmill Music Co. Ltd | Manufacturing | 2020 |
| Ashmore Credit Solutions Limited | Professional & scientific | 1996 |
| Ashour Living Ltd | Real estate | 2023 |
| Ashstone MEP Ltd | Other services | 2020 |
| Ashton Lewis Kitchens Ltd | Construction | 2014 |
| Ashton Travel Limited | Administrative & support | 2021 |
| Ashwood Furniture Company Ltd | Wholesale & retail | 2025 |
| ASI Automation Ltd | Wholesale & retail | 2017 |
| Asian Grocery Maidstone Ltd | Wholesale & retail | 2021 |
| ASK Construction Ltd | Construction | 2025 |
| ASK for Norah Ltd | Professional & scientific | 2019 |
| ASK US Property Services Ltd | Professional & scientific | 2017 |
| Askew Building Services Ltd | Manufacturing | 2006 |
| ASM Residential Limited | Real estate | 2001 |
| Aspen Rental Management Limited | Real estate | 2010 |
| Aspire Finance Solutions Limited | Financial services | 2013 |
| Aspire Home Carers (Ramsgate) Limited | Health & social care | 2022 |
| Aspire Land & New Homes Ltd | Real estate | 2020 |
| Aspire Tree and Vegetation Management Ltd | Agriculture & fishing | 2025 |
| Asprey Licenced Premises Limited | Hospitality | 2010 |
| Aspro Cleaning and Maintenance Ltd | Administrative & support | 2024 |
| Assalam Centre Maidstone Ltd | Other services | 2020 |
| Assembly Associates Ltd | Professional & scientific | 2017 |
| Assembly Renewable Energy Group Ltd | Construction | 2013 |