| AS Cuevas Landscaping & Design Ltd | Health & social care | 2016 |
| AS Developements Ltd | Construction | 2014 |
| AS Medway House Group Ltd | Real estate | 2024 |
| AS Roofing Solutions Ltd | Construction | 2024 |
| Asaap Limited | Real estate | 2023 |
| Asanyaolu Ltd | Health & social care | 2022 |
| Asbestos Limited | Professional & scientific | 2019 |
| ASC Auto Limited | Wholesale & retail | 2024 |
| Ascend Sports Coaching Ltd | Education | 2026 |
| Asguard Awareness Limited | Education | 2025 |
| ASH Court 1234 Freehold Company Limited | Households | 2026 |
| ASH Court 1234 RTM Company Ltd | Households | 2021 |
| Asham Indian Takeaway Ltd | Hospitality | 2021 |
| Ashby Heating Ltd | Construction | 2015 |
| Ashby Services Ltd | Construction | 2015 |
| Ashcroft Electrical Solutions Ltd | Construction | 2026 |
| Ashenden & Sons Ltd | Construction | 2023 |
| Ashford Brickworks (UK) Limited | Construction | 2001 |
| Ashford Capital Holdings Limited | Financial services | 2016 |
| Ashford Maintenance Limited | Extraterritorial | 2008 |
| Ashford Scaffolding Limited | Construction | 2001 |
| Ashlar Investments Limited | Households | 1987 |
| Ashleigh (Westbrook) House Limited | Households | 1984 |
| Ashton Interiors Limited | Other services | 2015 |
| Asian Basket Limited | Wholesale & retail | 2021 |
| Asian Single Parents Network CIC | Information & communication | 2020 |
| Asic Miner Market Group Ltd. | Professional & scientific | 2018 |
| ASM94 Ltd | Real estate | 2021 |
| Aspire Home Tutoring Limited | Education | 2018 |
| Asrc Solutions Ltd | Wholesale & retail | 2025 |
| Asser Electrical Services Limited | Manufacturing | 2010 |
| Assist Transit Global Limited | Information & communication | 2023 |
| Associated Garage Doors Limited | Construction | 2019 |
| Associated Veterinary Services Limited | Professional & scientific | 2019 |
| Assured Maintenance Services Ltd | Construction | 2026 |
| Assyst Solutions Limited | Information & communication | 2009 |
| Astac Universal Limited | Administrative & support | 2015 |
| Astrobiz Ltd | Wholesale & retail | 2024 |
| Astus Leatherworks Ltd | Wholesale & retail | 2025 |
| ASW Signalling Limited | Manufacturing | 2014 |
| ATA Investments 2024 Ltd | Real estate | 2024 |
| ATG - Installations Ltd | Construction | 2020 |
| Atkins Property Group Ltd | Construction | 2021 |
| Atlantis Assets Limited | Construction | 2012 |
| Atlas Motorcycles Ltd | Wholesale & retail | 2021 |
| Atonkonstruct Ltd | Construction | 2015 |
| ATT Commercial Rentals Ltd | Real estate | 2021 |
| Attrell Driveways and Landscaping Ltd | Administrative & support | 2022 |
| Attrell Park Construction Limited | Construction | 2022 |
| Aud's Taxis Limited | Administrative & support | 2003 |
| Audacious Solutions Ltd | Professional & scientific | 2025 |
| Audiomuse Limited | Wholesale & retail | 2025 |
| Aura Crystals Ltd | Extraterritorial | 2023 |
| Aura Marketing Limited | Professional & scientific | 2019 |
| Aura Professional Cleaning Limited | Administrative & support | 2026 |
| Auraglow Sciences Co., Ltd | Manufacturing | 2025 |
| Auren Services Ltd | Hospitality | 2026 |
| Aureumuk Ltd | Construction | 2018 |
| Aurora Adorn Aesthetics Ltd | Health & social care | 2025 |
| Aurum Events & Hospitality Ltd | Hospitality | 2025 |
| Ausher Estates and Investments Limited | Real estate | 2019 |
| Ausher Shewring Limited | Real estate | 2022 |
| Ausher White Ltd | Financial services | 2020 |
| Auspicious Marinserv Co., Ltd | Manufacturing | 2022 |
| Austen Lets Limited | Real estate | 2020 |
| Author and Finisher Consulting Ltd | Transport & logistics | 2019 |
| Autism Services | Extraterritorial | 2007 |
| Auto Salon Car Care Ltd | Administrative & support | 2022 |
| Auto Shine of Gillingham Ltd | Administrative & support | 2022 |
| Autobase Marden Limited | Wholesale & retail | 2025 |
| Autocam Limited | Wholesale & retail | 2010 |
| Autokings UK Limited | Wholesale & retail | 2020 |
| Autoline Recovery Ltd | Transport & logistics | 2019 |
| Automotive Systems and Safety Solutions Ltd | Professional & scientific | 2022 |
| Autoroute Pass Paiement Ltd | Wholesale & retail | 2025 |
| Autoshine of Parkwood Ltd | Administrative & support | 2024 |
| Autotech Innovation Co., Ltd | Wholesale & retail | 2023 |
| Autotechnics (Gillingham) Limited | Wholesale & retail | 2008 |
| Autotomi Ltd | Information & communication | 2023 |
| Auxiliary Group Limited | Other services | 2023 |
| AV Things Limited | Construction | 2025 |
| Avachi Limited | Administrative & support | 2019 |
| Avalon Apartments Ltd | Real estate | 2023 |
| Avalon Aviation Ltd | Manufacturing | 2025 |
| Avalon Logistics Limited | Transport & logistics | 2021 |
| Avalon Power Control Ltd | Construction | 2012 |
| Avelea Trans Ltd | Transport & logistics | 2017 |
| Avera Strategy Ltd | Professional & scientific | 2025 |
| AVK Property Solutions Ltd | Construction | 2026 |
| Avocado Holdings Ltd | Information & communication | 2017 |
| AVS Technology Ltd | Information & communication | 2015 |
| Awake Investments Ltd | Real estate | 2025 |
| Axiometrics (TM) Partners Europe Ltd | Education | 2013 |
| AY Grill Ltd | Hospitality | 2017 |
| Ayata Book-Keeping Ltd | Professional & scientific | 2019 |
| Ayflorence Limited | Public administration | 2022 |
| Aylesham Apartments (Kings Hill) Management Co Ltd | Households | 2011 |
| Ayobowale Properties Ltd | Real estate | 2020 |
| Ayoiremo Limited | Real estate | 2021 |
| Aysa Food and Wine Ltd | Wholesale & retail | 2018 |