| Acchu Properties Limited | Real estate | 2023 |
| Accommodation Solutions (SW12) Ltd | Real estate | 2018 |
| Accron Services Ltd | Professional & scientific | 2020 |
| Accurate Accountancy (UK) Ltd | Professional & scientific | 2016 |
| Ace Experts Ltd | Construction | 2016 |
| Ace Impex Ltd | Wholesale & retail | 2025 |
| Achonu Limited | Administrative & support | 2025 |
| ACM Drylining Ltd | Construction | 2016 |
| Acquire Print Limited | Manufacturing | 2019 |
| Acrow Construction Ltd | Construction | 2021 |
| ACS Corp Ltd | Wholesale & retail | 2025 |
| Active Sealion Ltd | Arts & recreation | 2019 |
| Acton Sports Club Ltd | Arts & recreation | 2022 |
| Acute Management Consultants (UK) Ltd | Real estate | 2003 |
| Ad&S Construction Ltd | Construction | 2017 |
| Ad's Cuddle Ltd | Wholesale & retail | 2025 |
| Adam Autos London Ltd | Wholesale & retail | 2023 |
| Addisons Property Limited | Real estate | 2019 |
| Aden Stargate Ltd | Extraterritorial | 2018 |
| Admikol Limited | Transport & logistics | 2021 |
| Adober Ltd | Hospitality | 2020 |
| Adored Homes Ltd | Real estate | 2021 |
| ADS Construction Ltd | Construction | 2021 |
| Advanced Tech Services & Solutions Ltd | Information & communication | 2022 |
| Adwordiser Ltd | Information & communication | 2018 |
| AE Construction 25 Ltd | Construction | 2025 |
| AEK RAJ Global Ltd | Real estate | 2024 |
| Aero Courier UK Limited | Transport & logistics | 2023 |
| AFA Properties London Limited | Real estate | 2025 |
| Afghan Events & Samanak Mela in London Ltd | Health & social care | 2011 |
| Afolimpex Management Consultants Limited | Professional & scientific | 2011 |
| Afro Asia Direct PVT Ltd | Wholesale & retail | 2024 |
| Afro Butterfly Ltd | Information & communication | 2014 |
| AFS Couriers Ltd | Transport & logistics | 2020 |
| AFS Technologies & Marketing Ltd | Information & communication | 2020 |
| Afsar Car Ltd | Transport & logistics | 2024 |
| Afuego Ltd | Hospitality | 2024 |
| Agile Fidelity Ltd | Information & communication | 2025 |
| AGP Plastering Ltd | Construction | 2020 |
| Agra Estates Ltd | Real estate | 2015 |
| AHA 5 Ltd | Health & social care | 2017 |
| Ahara Infinite Rise Ltd | Real estate | 2025 |
| AHB Hair and Beauty Ltd | Other services | 2025 |
| Ahee Beauty Ltd | Wholesale & retail | 2021 |
| AHG OFF Licence Ltd | Wholesale & retail | 2012 |
| Ahlam 1 Ltd | Real estate | 2026 |
| Air Cool Refrigeration Ltd | Other services | 2016 |
| Air-Sea Packing Group Limited | Transport & logistics | 1992 |
| Airports LUX Ltd | Transport & logistics | 2025 |
| Airsea Packing Holdings Limited | Transport & logistics | 2006 |
| Airtravelleader Limited | Administrative & support | 2013 |
| Aiyou Ltd | Financial services | 2025 |
| Aizah Services Limited | Financial services | 2025 |
| AJ Motion Ltd | Transport & logistics | 2026 |
| AJ Online Trading Ltd | Wholesale & retail | 2025 |
| AJ Plumbing and Mechanical Limited | Construction | 2014 |
| AJG Fire Ltd | Construction | 2021 |
| Ajpal Ltd | Construction | 2025 |
| Ajtj Limited | Manufacturing | 2004 |
| AK Aesthetics LDN Limited | Other services | 2025 |
| AK Consultancy & Finance Ltd | Administrative & support | 2025 |
| AK Contracting Ltd | Construction | 2024 |
| AK Global Properties Limited | Real estate | 2025 |
| AK Twist Ltd | Wholesale & retail | 2025 |
| Akbc Ltd | Construction | 2018 |
| Akcel Ltd | Construction | 2017 |
| AKI Commercial Limited | Wholesale & retail | 2016 |
| AKM Build Ltd | Construction | 2015 |
| Akmg London Limited | Real estate | 2023 |
| AKP & Amaya Ltd | Wholesale & retail | 2025 |
| AKP Retailer Ltd | Wholesale & retail | 2023 |
| AKR & SHO Ltd | Wholesale & retail | 2016 |
| AKS Food and Caterings Limited | Hospitality | 2025 |
| AKS Property Services Limited | Real estate | 2022 |
| AKS Venture Ltd | Wholesale & retail | 2025 |
| Aksah Retails PVT Ltd | Wholesale & retail | 2024 |
| AL Amir Trading UK Limited | Households | 2022 |
| AL Bader International Trade Ltd | Wholesale & retail | 2024 |
| AL Manala Ltd | Hospitality | 2019 |
| AL Mukhtari Food Limited | Wholesale & retail | 2025 |
| AL Nasser International UK Ltd | Wholesale & retail | 2022 |
| AL Property Sales Limited | Real estate | 2013 |
| Al&S Building Services Ltd | Construction | 2020 |
| Al-Ayoubi Limited | Real estate | 2021 |
| Al-Haq Enterprise Ltd | Wholesale & retail | 2011 |
| Al-Reem Beauty Ltd | Other services | 2020 |
| Al-Tawakkal Limited | Transport & logistics | 2017 |
| Alan Fletcher Heating & Plumbing Services Ltd | Construction | 2018 |
| Alavon Consultants Ltd. | Professional & scientific | 2025 |
| Albe-Transport Ltd | Transport & logistics | 2022 |
| Albion Travel Ltd | Administrative & support | 2019 |
| Aldelfi Ltd | Wholesale & retail | 2020 |
| Alec Reed Academy Enterprise Limited | Arts & recreation | 2011 |
| Alertkick Ltd | Information & communication | 2026 |
| Alex Properties Investments Limited | Real estate | 2023 |
| Alexino Limited | Transport & logistics | 2016 |
| Alfabeta Plumbing & Heating Ltd | Construction | 2019 |
| Alfamatrix Holdings Ltd | Construction | 2025 |
| ALI Industries Limited | Wholesale & retail | 2018 |
| ALI Meat Ltd | Wholesale & retail | 2022 |