| Agim Painting ND Decorating Ltd | Construction | 2024 |
| Agrobot Ltd. | Wholesale & retail | 2024 |
| AH Consultancy (Kent) Limited | Professional & scientific | 2016 |
| AHE Care Services Ltd | Hospitality | 2021 |
| AHE Services Limited | Administrative & support | 2013 |
| Ahmzy Ltd | Professional & scientific | 2025 |
| AI Advisory Limited | Professional & scientific | 2019 |
| Aifam Ltd | Transport & logistics | 2017 |
| Aina Trilogy Foundation | Other services | 2018 |
| Airborne Services Limited | Professional & scientific | 1996 |
| AIS Haulage Ltd | Transport & logistics | 2019 |
| AJM Events Ltd | Hospitality | 2024 |
| AJM Success Ltd | Other services | 2021 |
| AJP Maintenance Limited | Administrative & support | 2002 |
| AJR Property Assets Limited | Real estate | 2026 |
| Akash Tandoori NU Limited | Hospitality | 2023 |
| AKE Collective CIC | Wholesale & retail | 2024 |
| Akin Tracks Ltd | Construction | 2025 |
| Akkulak Kebab Ltd | Hospitality | 2026 |
| Aksv Ltd | Professional & scientific | 2025 |
| AL & in 1 Limited | Real estate | 2020 |
| AL & in 2 Limited | Wholesale & retail | 2020 |
| AL Monsur Catering Limited | Hospitality | 2019 |
| Alanko Limited | Construction | 2017 |
| Alaraloluwa Ltd | Wholesale & retail | 2022 |
| ALB Solars Ltd | Energy | 2025 |
| Alberto Conversano Ltd | Administrative & support | 2020 |
| Albest Trading Co., Ltd | Wholesale & retail | 2024 |
| Albion Outlook Ltd. | Health & social care | 2014 |
| Alchemy Educational Services Ltd | Education | 2026 |
| ALD Support Limited | Health & social care | 2019 |
| ALD Surrey Limited | Health & social care | 2022 |
| Aldtech Limited | Information & communication | 2021 |
| Alexander Stevens Design Consulting Limited | Administrative & support | 2018 |
| Alfmich Limited | Wholesale & retail | 2024 |
| Alfur Accountancy Limited | Professional & scientific | 2020 |
| Alfurpop Limited | Professional & scientific | 2025 |
| Alice Noakes PR Limited | Professional & scientific | 2023 |
| Alif Global Digital Ltd | Information & communication | 2025 |
| Alkis Properties Limited | Real estate | 2018 |
| ALL Areas Access Partnership Ltd | Administrative & support | 2016 |
| ALL Aspect Builders Ltd | Construction | 2008 |
| ALL Choice First Cars Ltd | Wholesale & retail | 2007 |
| ALL Door Maintenance Ltd | Construction | 2011 |
| ALL Glazing Solutions (SE) Ltd | Construction | 2025 |
| ALL Home Developments Ltd | Construction | 2026 |
| ALL Kent Loft Conversions Ltd | Construction | 2026 |
| ALL Kent Plastering Limited | Construction | 2014 |
| ALL Kent Windows Doors and Home Improvement Ltd | Construction | 2022 |
| ALL OUT Apparel Ltd | Wholesale & retail | 2021 |
| ALL Round Personal Training Ltd | Arts & recreation | 2013 |
| ALL Seasons Hotel Holdings Ltd | Transport & logistics | 2018 |
| ALL Small Loads Kent Ltd | Water & waste | 2021 |
| ALL Type Construction and Groundworks Limited | Construction | 2024 |
| Allard Land Consultancy Limited | Agriculture & fishing | 2026 |
| Allbright Cleaning Services Ltd | Administrative & support | 2025 |
| Allbuild Lettings Ltd | Real estate | 2020 |
| Allfoods Limited | | 1990 |
| Allfruit Direct Limited | Wholesale & retail | 2012 |
| Allied Ecommerce Limited | Other services | 2026 |
| Allied Specialists Limited | Professional & scientific | 2009 |
| Allison Ltd | Professional & scientific | 2009 |
| Alltender Care Services Limited | Health & social care | 2017 |
| Alpha Impact Limited | Wholesale & retail | 2002 |
| Alpine 100 (Chatham) Community Interest Company | Education | 2024 |
| Alstar Developers Limited | | 1986 |
| Altiné UK Ltd | Construction | 2024 |
| Alton Solution Ltd | Wholesale & retail | 2017 |
| Aluma Tech Ltd | Information & communication | 2025 |
| AM Pizza UK Ltd | Hospitality | 2011 |
| AMA Deluxe Ltd | Construction | 2017 |
| Amacare Service Ltd | Health & social care | 2025 |
| Amadam Trading Co., Limited | Wholesale & retail | 2023 |
| Amalgamated Group Limited | Health & social care | 2023 |
| Amaranth Books Limited | Information & communication | 2009 |
| Amasing Stays Ltd | Hospitality | 2023 |
| Amazing Laser and Beauty Clinic Ltd | Other services | 2017 |
| Amazing Store Buy & Sell Ltd | Wholesale & retail | 2015 |
| Amazon 24 Fitness Ltd | Other services | 2015 |
| AMAZON24 Fit CIC | Education | 2026 |
| AMAZON24 PT Academy Ltd | Education | 2025 |
| Ambercircle Limited | | 1983 |
| Amberstew Ltd | Construction | 2007 |
| Ambler Electrical & Home Improvements Ltd | Construction | 2014 |
| Ambler Property Ltd | Real estate | 2024 |
| AMC Insurance Appointments Limited | Administrative & support | 2005 |
| Amelia Court Kings Hill Management Company Limited | Households | 2018 |
| American Pizza Gillingham Ltd | Hospitality | 2025 |
| American Thoroughbred Products Limited | Administrative & support | 1988 |
| AMH Brickwork Ltd | Construction | 2021 |
| Amira Medical Limited | Health & social care | 2025 |
| Amirhansoy Ltd | Wholesale & retail | 2021 |
| Amity Support Service Ltd | Administrative & support | 2026 |
| AMJ Projects Ltd | Real estate | 2025 |
| Amjago Properties Ltd | Real estate | 2023 |
| AMM Foodie Ltd | Hospitality | 2025 |
| Amor Fati Limited | Real estate | 2023 |
| Amor Mexican Ltd | Hospitality | 2023 |
| Amplifix Studios Ltd. | Manufacturing | 2024 |
| AMR Bikes Ltd | Wholesale & retail | 2021 |