| Ali's Cafe Ltd | Hospitality | 2019 |
| Ali's Holiday Apartments Ltd | Real estate | 2025 |
| Ali's Property Holdings Ltd | Real estate | 2026 |
| Alice Account.In.London Ltd | Professional & scientific | 2023 |
| Alif Gastronomy Limited | Administrative & support | 2026 |
| ALL Car Spares Limited | Wholesale & retail | 2017 |
| ALL Heads Limited | Transport & logistics | 2014 |
| ALL Kent Services Limited | Manufacturing | 2011 |
| ALL Solv Ltd | Information & communication | 2020 |
| ALL Waste Skip Hire Ltd | Other services | 2018 |
| ALL Your Needs UK Shopper Limited | Other services | 2023 |
| Allencase Ltd | Construction | 2022 |
| Alliance and General Contractors Ltd. | Professional & scientific | 2016 |
| Allout Engineering Designs Ltd | Professional & scientific | 2018 |
| Alloy Fittings & Flanges Ltd | Wholesale & retail | 2017 |
| Ally Properties Ltd | Real estate | 2023 |
| Alnimir Limited | Health & social care | 2024 |
| Alovah Care Consultancy Ltd | Professional & scientific | 2022 |
| Alpha 360 Ltd | Extraterritorial | 2026 |
| Alpha Engines Ltd | Wholesale & retail | 2022 |
| Alpha Structures Ltd | Other services | 2018 |
| Alphazero Parts Ltd | Manufacturing | 2019 |
| ALX Property Holdings Ltd | Real estate | 2025 |
| ALY Lifts Ltd | Construction | 2018 |
| Alya Beauty Limited | Administrative & support | 2023 |
| Alyac-Numkand INT Ltd | Transport & logistics | 2021 |
| AM Electrical Works Ltd | Construction | 2025 |
| AM Leccy Ltd | Construction | 2018 |
| Amapharma Ltd | Wholesale & retail | 2020 |
| Amariese & Aaron Ltd | Information & communication | 2019 |
| Amarni Nanny Ltd | Education | 2023 |
| Amasclinicuk Limited | Other services | 2024 |
| Ambijanex Ltd | Wholesale & retail | 2020 |
| AMC Solution Services Ltd | Construction | 2025 |
| AMD Accountancy Ltd | Professional & scientific | 2021 |
| Amee Solutions Limited | Health & social care | 2011 |
| AMG Drylining Ltd | Construction | 2021 |
| Amigos Telecom Ltd | Wholesale & retail | 2025 |
| Amisrhe Global Ltd | Wholesale & retail | 2025 |
| AMJ Jones Property Limited | Real estate | 2024 |
| Ammolite Ventures Limited | Real estate | 2024 |
| Amorbeautyldn Ltd | Other services | 2025 |
| Amore Beam Park Ltd | Other services | 2025 |
| Amore London Beauty & Co Ltd | Other services | 2026 |
| Ample Powers Recruitment and Training Limited | Administrative & support | 2022 |
| AMR Facility Management Ltd | Real estate | 2024 |
| AMR Garner Consulting Limited | Professional & scientific | 2011 |
| Amsun Homes Ltd | Construction | 2016 |
| AMT Autos Ltd | Wholesale & retail | 2026 |
| Amy's Aesthetics Ltd | Health & social care | 2025 |
| Anaa Properties Ltd | Real estate | 2026 |
| Anatomy Ltd | Administrative & support | 2018 |
| Anbu Group Ltd | Wholesale & retail | 2025 |
| Anchor Stay Co Ltd | Hospitality | 2025 |
| Andanpal Construction Ltd | Construction | 2019 |
| Andertons Global LLP | | 2017 |
| Andexc Limited | Health & social care | 2025 |
| Andreea Trans Ltd | Transport & logistics | 2016 |
| Andrian & Marius Ltd | Construction | 2014 |
| Andyco Driving Solutions Ltd | Transport & logistics | 2024 |
| Andymar Limited | Wholesale & retail | 2022 |
| Aneq Properties Ltd | Real estate | 2025 |
| Angel City Cars Ltd | Transport & logistics | 2009 |
| Annie Thompson Selbie Interiors Ltd | Administrative & support | 2026 |
| Annika Alford Ltd | Professional & scientific | 2022 |
| ANT P&H Limited | Construction | 2021 |
| Anthaio Limited | Information & communication | 2018 |
| Anthoka Geophysical Ltd | Professional & scientific | 2023 |
| Anwar Advisory Ltd | Professional & scientific | 2025 |
| Apex Building Services Ltd | Construction | 2025 |
| Apex Fmcg Supplies Ltd | Wholesale & retail | 2024 |
| Apex Safety Training Ltd | Education | 2026 |
| Apex Solutions Services Ltd | Administrative & support | 2026 |
| Apex Trade Solutions Ltd | Agriculture & fishing | 2023 |
| APH International Limited | Information & communication | 2021 |
| Apple Squad Ltd | Wholesale & retail | 2016 |
| April Addow Limited | Administrative & support | 2022 |
| Aquamas Pets Ltd | Wholesale & retail | 2023 |
| Aramiche Solutions Limited | Professional & scientific | 2018 |
| ARC Drywall Solution Ltd | Construction | 2025 |
| Archie's Timber and Building Supplies Ltd | Wholesale & retail | 2023 |
| Architectural Flooring Specialists Ltd | Construction | 2012 |
| Argoict Softwae Solutions Ltd | Information & communication | 2024 |
| Argus Business Solutions Limited | Professional & scientific | 2022 |
| ARI Commercial Ltd | Wholesale & retail | 2025 |
| ARI Scents Ltd | Manufacturing | 2025 |
| Arin Consultancy Limited | Information & communication | 2014 |
| Arise & Shine Health Care Ltd | Administrative & support | 2013 |
| Arise Lighthouse Ltd | Real estate | 2021 |
| Arizona Export Services Ltd | Wholesale & retail | 2016 |
| ARK Shaw Ltd | Information & communication | 2017 |
| Arkadios Builders Ltd | Construction | 2017 |
| Arlo Resourcing Ltd | Wholesale & retail | 2022 |
| Armex Security Group Ltd | Administrative & support | 2026 |
| Armo Logistics Limited | Construction | 2019 |
| Army & Navy Workwear Limited | Wholesale & retail | 2014 |
| Arnavya Ltd | Health & social care | 2024 |
| Aroc Holding Ltd | Construction | 2024 |
| ARQ Food Limited | Wholesale & retail | 2019 |
| ARS Food Ltd | Wholesale & retail | 2016 |