| A W Lift Services Ltd | Manufacturing | 2016 |
| A Walsh Flooring Ltd | Construction | 2024 |
| A Williamson Transport Ltd | Transport & logistics | 2021 |
| A&A Homes Kent Limited | Real estate | 2024 |
| A&A Investment Group Ltd | Financial services | 2021 |
| A&A LET Ltd | Real estate | 2019 |
| A&B Building Services Kent Ltd | Construction | 2023 |
| A&D Industrial Doors Limited | Other services | 2012 |
| A&D Urban Ltd | Transport & logistics | 2016 |
| A&F Courier Services Limited | Transport & logistics | 2019 |
| A&F Painting Decorating Ltd | Construction | 2022 |
| A&L Property Group Ltd | Real estate | 2022 |
| A&M Invictus Barbers Ltd | Other services | 2025 |
| A&Mc Decorators and Services Ltd | Construction | 2016 |
| A&R Recovery LLP | | 2023 |
| A&R Scaffolding Ltd | Construction | 2016 |
| A&T Formulation Ltd | Wholesale & retail | 2022 |
| A&T MOT Centre Ltd | Transport & logistics | 2023 |
| A-Kay Electrics Ltd | Construction | 2021 |
| A. Paul Services Limited | Professional & scientific | 2014 |
| A.B. Surveying & Site Engineering Services Limited | Professional & scientific | 1997 |
| A.C.R.N. Limited | Other services | 2015 |
| A.D.G. Electrical (Kent) Ltd | Construction | 2007 |
| A.D.O Builders Limited | Construction | 2021 |
| A.D.S. Associates Ltd. | Professional & scientific | 2002 |
| A.I.O Group Ltd | Construction | 2021 |
| A.J.D. Building Services Limited | Construction | 2001 |
| A.J.F. Painting & Decorating Ltd | Construction | 2007 |
| A.J.R. Cook Ltd | Professional & scientific | 2020 |
| A.J.S. Electrical (SE) Limited | Construction | 2004 |
| A.M. Goddard Limited | Construction | 2012 |
| A.M.Daniels Ltd | Transport & logistics | 2021 |
| A.Ma Leisure Limited | Arts & recreation | 2017 |
| A.P Decorators Ltd | Construction | 2022 |
| A.P. FRY Haulage Limited | Transport & logistics | 2006 |
| A.R. Cook Holdings Ltd | Financial services | 2018 |
| A.W. Coppin Limited | Construction | 1960 |
| A1 Electricians Ltd | Construction | 2015 |
| A1 Wedding Cars Limited | Administrative & support | 2019 |
| A20 Grill Limited | Hospitality | 2021 |
| A2B Safety Ltd | Other services | 2024 |
| A2Z Kent Limited | Professional & scientific | 2005 |
| A2Z Recruitment Limited | Other services | 2018 |
| A:Tifakt Ltd | Wholesale & retail | 2018 |
| AA & T Consulting Services Ltd | Professional & scientific | 2023 |
| AA Eatry Maidstone Limited | Hospitality | 2023 |
| AA Hub Ltd | Wholesale & retail | 2026 |
| AA Maidstone Properties Limited | Real estate | 2026 |
| AA UK Properties Group Ltd | Real estate | 2025 |
| AAA Cars Maidstone Ltd | Transport & logistics | 2025 |
| AAA Naturally Covered Ltd | Construction | 2015 |
| AAA Timber Supplies & Services Ltd | Construction | 2018 |
| Aaartpipe Limited | Construction | 2022 |
| Aaathirsh Property Ltd | Real estate | 2024 |
| Aaaz Medical Limited | Public administration | 2026 |
| AAB Creations Ltd | Wholesale & retail | 2023 |
| AAG Property Developments Limited | Construction | 2026 |
| AAS Tiling Services Limited | Manufacturing | 2015 |
| Aask Trading Limited | Construction | 2012 |
| AAY Enterprises Ltd | Wholesale & retail | 2026 |
| AB & Co Accounting &Tax Services Limited | Professional & scientific | 2016 |
| AB Carpenters Ltd | Construction | 2016 |
| AB Court Limited | Wholesale & retail | 2017 |
| AB DAN Trans Ltd | Transport & logistics | 2024 |
| AB Esoof Limited | Health & social care | 2015 |
| AB FITNESS1978 Limited | Arts & recreation | 2021 |
| AB Travel Consulting Limited | Administrative & support | 2009 |
| AB Web Agency Ltd | Information & communication | 2022 |
| Abacus Blinds and Awnings (Southeast) Ltd | Manufacturing | 2014 |
| Abacus Credit Consultancy Ltd | Administrative & support | 2007 |
| Abacus Performance Media Ltd | Information & communication | 2021 |
| Abalos Limited | Administrative & support | 2016 |
| ABB Health Ltd | Health & social care | 2019 |
| ABB Logistics Limited | Transport & logistics | 2025 |
| Abbas Haider Limited | Wholesale & retail | 2025 |
| Abbey Gardens (Ashford) Management Company Limited | Households | 2011 |
| Abbeygate Heath Properties Limited | Real estate | 2017 |
| Abbeyladder Limited | Real estate | 1983 |
| Abbington 28 Ltd | Health & social care | 2020 |
| Abbington Health Group Ltd | Financial services | 2022 |
| Abby AI Limited | Information & communication | 2024 |
| Abcateringsolutions Limited | Administrative & support | 2022 |
| Abeem Holdings Limited | Financial services | 2022 |
| Abex Psychology Services Limited | Health & social care | 2025 |
| Abharna Limited | Wholesale & retail | 2025 |
| Ability Needs CIC | Education | 2020 |
| Abingdon Court (Tenants) Kensington Limited | Households | 1970 |
| Abingdon Court Freehold Limited | Real estate | 1984 |
| Abingdon Gardens Management Limited | Households | 1963 |
| Abirami Company Ltd | Health & social care | 2019 |
| Abishegs Enterprise Ltd | Hospitality | 2025 |
| Ablution Solutions Limited | Construction | 2015 |
| Abmm (Chichester) Limited | Real estate | 2022 |
| Abmm (Guildford) Limited | Real estate | 2020 |
| Abmm (Kensington) Limited | Real estate | 2013 |
| Abode Lettings Limited | Construction | 1995 |
| Abonyi Ltd | Professional & scientific | 2026 |
| Abound and Flourish | Other services | 2020 |
| ABR Dawson Properties Ltd | Construction | 2019 |
| Abram Kodaa London Limited | Wholesale & retail | 2021 |