| Abah Property Services Ltd | Construction | 2020 |
| Abbco H&V Limited | Transport & logistics | 2000 |
| Abbey Liftcare Limited | Construction | 1994 |
| Abbey Mollar Ltd | Professional & scientific | 2015 |
| Abbey Paving and Roofing Ltd | Construction | 2025 |
| Abbey Roofing (EU) Limited | Construction | 2008 |
| Abbey Services Hampshire Limited | Information & communication | 2024 |
| Abbeybuild Limited | Construction | 2009 |
| Abbeynash Technology Ltd | Information & communication | 2023 |
| Abbies Home Ltd | Real estate | 2025 |
| Abbletts Ltd | Real estate | 2025 |
| Abbot Accounting Limited | Professional & scientific | 2011 |
| Abbott Catering Services Limited | Manufacturing | 2008 |
| Abbott Crescent Real Estate Ltd | Real estate | 2024 |
| Abbr Ltd | Real estate | 2025 |
| Abbybelle Ltd | Transport & logistics | 2019 |
| Abcatering Ltd | Hospitality | 2014 |
| Abhiksha Solutions Limited | Information & communication | 2017 |
| Abhisoft Solutions Ltd | Information & communication | 2008 |
| ABI & Lola Property Management Ltd | Households | 2020 |
| ABI and Bros Properties Ltd | Real estate | 2022 |
| ABI D Properties Ltd | Real estate | 2024 |
| Abidjan Kaolin Ltd | Wholesale & retail | 2021 |
| Abike ADE Communications Ltd | Professional & scientific | 2009 |
| Abiola Onagoruwa Ltd. | Professional & scientific | 2017 |
| Able Lifts Limited | Administrative & support | 2005 |
| Able Skills Limited | Information & communication | 2005 |
| Able.Fire Ltd | Construction | 2026 |
| Abos Promotions Ltd | Professional & scientific | 2025 |
| About the Journey Ltd | Administrative & support | 2025 |
| ABP 2 Limited | Real estate | 2023 |
| ABP Packaging Limited | Administrative & support | 2008 |
| Abrahams Properties Ltd | Real estate | 2019 |
| Abridge Boar Ltd | Arts & recreation | 2021 |
| ABS Assets (Kent) Ltd | Administrative & support | 2017 |
| ABS Group (Kent) Ltd | Financial services | 2017 |
| ABS Management Services (Kent) Ltd | Administrative & support | 2017 |
| Absolute Eco Energy Ltd | Energy | 2009 |
| Absolute Energy Supplies Ltd | Construction | 2008 |
| Absolute Water Limited | Water & waste | 2004 |
| Abtoper Property & Construction Ltd | Real estate | 2026 |
| Abtto Limited | Professional & scientific | 2015 |
| ABV Hair & Beauty Ltd | Arts & recreation | 2009 |
| AC Company Holdings Ltd | Real estate | 2021 |
| AC Maven Ltd | Professional & scientific | 2025 |
| AC Services (S.E.) Ltd | Manufacturing | 2016 |
| Acacia Development and Training Limited | Professional & scientific | 2018 |
| Acacia Property Development Limited | Real estate | 2023 |
| Academy AZ Ltd | Hospitality | 2024 |
| Accelerera Ltd | Professional & scientific | 2014 |
| Accentbuilding Ltd | Construction | 2019 |
| Accesse Motorcycles Ltd | Wholesale & retail | 2025 |
| Acclaim Building Contractors Limited | Construction | 2018 |
| Accommodate-Uk Limited | Real estate | 1966 |
| Accommodate-Uk Management Limited | Real estate | 2014 |
| Accountants of Kent Limited | Professional & scientific | 2020 |
| Accountants of Lavenham Limited | Professional & scientific | 2019 |
| Accounting Bureaux Ltd | Professional & scientific | 2022 |
| Accrida Limited | Professional & scientific | 2015 |
| Accurad Limited | Professional & scientific | 2023 |
| Ace Bar Events Limited | Hospitality | 2008 |
| Ace Building & Quality Control Ltd | Professional & scientific | 2023 |
| Ace Cloud Consultancy Ltd | Information & communication | 2022 |
| Ace Contractors Group Limited | Water & waste | 2025 |
| Ace Mgmt Svcs Ltd | Administrative & support | 2024 |
| Ace Rubbish Limited | Water & waste | 2020 |
| Ace Vacation Rentals Limited | Hospitality | 2018 |
| Acemeds Ltd | Health & social care | 2015 |
| Acerill Ltd | Information & communication | 2016 |
| ACF (South East) Limited | Construction | 2026 |
| Achieve Alpha Limited | Information & communication | 2009 |
| Achievers Care Group Limited | Professional & scientific | 2026 |
| Achievers Care Solutions Limited | Health & social care | 2017 |
| Achilles Associates Limited | Professional & scientific | 2018 |
| ACI Landscapes Ltd | Construction | 2016 |
| ACI Rentals Ltd | Real estate | 2023 |
| ACL Ventures Limited | Real estate | 2017 |
| Acmeville Property Limited | Real estate | 2022 |
| Acob Projects Limited | Construction | 2019 |
| Acorn Clinic Ltd. | Health & social care | 2010 |
| Acorn Royale Limited | Real estate | 2022 |
| Acorns Early Years Centre | Education | 2000 |
| Acres Way Dog Pound Limited | Other services | 2008 |
| ACS Accounts Services Ltd | Professional & scientific | 2014 |
| ACS MAX Ltd | Construction | 2017 |
| ACT Building Consultancy Ltd | Professional & scientific | 2013 |
| Acting UP Kent Limited | Education | 2022 |
| Active Care Education Ltd | Information & communication | 2021 |
| Active Contracts LLP | | 2007 |
| Active Life Limited | Arts & recreation | 2002 |
| Active Travel Partners Ltd | Administrative & support | 2011 |
| Acuteflooring Limited | Construction | 2016 |
| AD Leap UK Limited | Professional & scientific | 2018 |
| Adaa Technologies Ltd | Information & communication | 2015 |
| Adac Limited | Real estate | 2024 |
| Adam Hatch Ltd | Information & communication | 2022 |
| Adams & Moore (Holdings) Ltd | Other services | 2011 |
| Adams & Moore (NRL) Ltd | Professional & scientific | 2020 |
| Adams & Moore Capital Ltd | Real estate | 2021 |
| Adams & Moore Limited | Professional & scientific | 2005 |