| Acacia Gardens & Horticulture Limited | Professional & scientific | 2012 |
| Academy Building Works Ltd | Construction | 2017 |
| Accelarated-Education.Co.Uk Limited | Education | 2023 |
| Acceleratetech Limited | Information & communication | 2024 |
| Access Rail Solutions Limited | Construction | 2015 |
| ACCESS2CONSULTANCY Ltd | Administrative & support | 2008 |
| Accessories Gift Centre T/A HI Profile Ltd | Wholesale & retail | 2014 |
| Accident Claims Help Time Ltd | Professional & scientific | 2007 |
| Accma Accountants Ltd | Professional & scientific | 2006 |
| Accma Properties Ltd | Real estate | 2016 |
| Accountedge Financial Ltd | Professional & scientific | 2025 |
| Accountex Ltd | Information & communication | 2018 |
| Accountips(Uk) Ltd | Professional & scientific | 2020 |
| Accurate Payroll Services Limited | Professional & scientific | 2017 |
| Ace Capital Investments Limited | Real estate | 2022 |
| Ace Contractor 385 Limited | Construction | 2013 |
| Ace Distribution Group Ltd | Wholesale & retail | 2025 |
| Ace DK Properties Ltd | Real estate | 2017 |
| Ace Engineering Works Limited | Manufacturing | 2025 |
| Ace Learning Tuition Limited | Education | 2022 |
| Ace Lofts London Ltd | Construction | 2017 |
| Ace Move Properties Limited | Real estate | 2019 |
| Ace Pick Ltd | Wholesale & retail | 2022 |
| Aceiis Ltd | Information & communication | 2024 |
| Acemen Ventures Limited | Wholesale & retail | 2026 |
| Acental Limited | Information & communication | 2007 |
| Aceprestigeautomotive Ltd | Wholesale & retail | 2025 |
| Aceso Universal Limited | Other services | 2015 |
| Achyuta Enterprises Limited | Wholesale & retail | 2025 |
| Aciers UK Limited | Other services | 2008 |
| ACL Assessments Ltd | Construction | 2023 |
| Acmm Limited | Wholesale & retail | 2025 |
| Acpharma Ltd | Wholesale & retail | 2023 |
| Acpharmaservices Ltd | Professional & scientific | 2022 |
| Acquah London Limited | Wholesale & retail | 2016 |
| Acquire Commercial Ltd | Real estate | 2024 |
| Acqxelo Ltd | Wholesale & retail | 2026 |
| Acre 1176 Limited | Real estate | 2014 |
| Acsk Limited | Hospitality | 2023 |
| ACT Property Management Limited | Real estate | 2024 |
| Action Bodyworks Ltd | Wholesale & retail | 2026 |
| Actor Management Ltd | Professional & scientific | 2025 |
| Acute Technologies (PVT) Limited | Information & communication | 2018 |
| AD Aviation Ltd | Education | 2019 |
| AD Enterprises Limited | Professional & scientific | 2014 |
| AD Photography Studio Ltd | Professional & scientific | 2017 |
| AD Solutions Limited | Real estate | 2025 |
| Adalatk Ltd | Professional & scientific | 2021 |
| Adam Accountancy Services London Ltd | Professional & scientific | 2023 |
| Adam and EVE Real Estate Ltd | Real estate | 2025 |
| Adam and Yassen Ltd | Construction | 2020 |
| Adam Driving School Ltd | Education | 2023 |
| Adam Education Trust Ltd | Education | 2016 |
| Adam Halal Meat and Fish UK Limited | Wholesale & retail | 2016 |
| Adam Hotel Management Ltd | Hospitality | 2011 |
| Adam Hotels ( UK ) Ltd | Hospitality | 2015 |
| Adam Mercer Financial Services Ltd | Professional & scientific | 2017 |
| Adam Mercer Real Estate Ltd | Real estate | 2016 |
| Adam Remit Ltd | Information & communication | 2010 |
| Adam's Supermarket Ltd | Wholesale & retail | 2024 |
| Adams VFX Limited | Administrative & support | 2021 |
| Adam’S Coffee Ltd | Hospitality | 2018 |
| Adapt Sales Solution Ltd | Professional & scientific | 2025 |
| Adaptive Atlas Ltd | Wholesale & retail | 2022 |
| Adarsi Limited | Information & communication | 2014 |
| Adas Property Services Ltd | Real estate | 2021 |
| Adbk Ltd | Manufacturing | 2024 |
| ADD on Projects JG 2 Ltd | Construction | 2024 |
| ADD on Projects JG Limited | Real estate | 2020 |
| Addison ABC Limited | Professional & scientific | 2024 |
| Addworks Printing Solutionts Ltd | Manufacturing | 2026 |
| Adealex Ltd | Construction | 2025 |
| Adeeb Sons and Co Ltd | Manufacturing | 2025 |
| Adept Building and Maintenance Services Ltd | Construction | 2023 |
| Adeux Designers Ltd | Professional & scientific | 2017 |
| ADI Finance 1 Limited | Professional & scientific | 2006 |
| ADI Finance 2 Limited | Professional & scientific | 2006 |
| Adiraj Ltd | Real estate | 2026 |
| Aditya Twickenham Cake and Co Ltd | Wholesale & retail | 2025 |
| ADL (London) Limited | Professional & scientific | 2010 |
| Admire Sport Limited | Wholesale & retail | 2026 |
| Adnali Ltd | Wholesale & retail | 2020 |
| Adner Properties Limited | Construction | 2006 |
| Adolfo Ltd | Construction | 2026 |
| Adonis Care Limited | Wholesale & retail | 2025 |
| Adonis Cash & Carry Ltd | Wholesale & retail | 2024 |
| Adrian's Building Services Ltd | Construction | 2012 |
| Adrian's Electrical Services AES Ltd | Construction | 2023 |
| Adrian+ Ltd | Transport & logistics | 2020 |
| Adskills Certification Ltd | Education | 2016 |
| Advance Dental Ltd | Health & social care | 2020 |
| Advance Skills Training Ltd | Education | 2013 |
| Advanced Combat Training Systems Ltd. | Professional & scientific | 2019 |
| Advanced Media Innovation Systems Limited | Information & communication | 2008 |
| Advanced Practice Ltd | Health & social care | 2011 |
| Advantage Multi Academy Trust | Education | 2017 |
| Adventures Sports Systems and Timing Ltd | Arts & recreation | 2023 |
| Advite Technologies Ltd | Wholesale & retail | 2023 |
| AE Detailerz LLP | | 2024 |
| Ae-Fix Ltd | Construction | 2023 |