| Accolade Luxury Group Ltd | Wholesale & retail | 2017 |
| Accord Accounting Services Ltd | Professional & scientific | 2023 |
| Account Aspects Limited | Professional & scientific | 2011 |
| Accountancy and Tax Advisory Ltd | Professional & scientific | 2020 |
| Accountancy Circle Ltd | Professional & scientific | 2017 |
| Accounting Planet Ltd | Information & communication | 2020 |
| Accountology Services Ltd | Professional & scientific | 2024 |
| Accredo Estate Limited | Professional & scientific | 2017 |
| Accro Productions Ltd | Information & communication | 2021 |
| Ace Cargo Express Ltd | Transport & logistics | 2010 |
| Ace Line Communications W London Ltd | Wholesale & retail | 2019 |
| Ace Local Food and Wine Ltd | Wholesale & retail | 2025 |
| Ace London Roofing Ltd | Construction | 2023 |
| Ace Multi-Trade Limited | Construction | 2025 |
| Ace Myanmar Company Limited | Real estate | 2025 |
| Ace Shopfront & Shutters Ltd | Manufacturing | 2016 |
| Ace Wholesale Ltd | Wholesale & retail | 2020 |
| Ace Zone Ltd | Wholesale & retail | 2023 |
| Acebuy Limited | Wholesale & retail | 2023 |
| Acharwala Limited | Wholesale & retail | 2024 |
| Achievers Education Services Ltd | Education | 2023 |
| Achilleus Medical UK Ltd | Manufacturing | 2022 |
| Achinka Limited | Wholesale & retail | 2014 |
| Acord Group Ltd | Transport & logistics | 2023 |
| ACP Aesthetics London Ltd | Other services | 2024 |
| ACR Electricals London Ltd | Construction | 2010 |
| Acrm Catering Limited | Hospitality | 2025 |
| ACS Express Limited | Transport & logistics | 2014 |
| ACS Industrial Doors Limited | Extraterritorial | 2019 |
| ACT Together Ltd | Wholesale & retail | 2022 |
| Active Wizard Store Ltd | Wholesale & retail | 2023 |
| ACTIVE123 Limited | Transport & logistics | 2017 |
| Acumen Triumph Traders Limited | Wholesale & retail | 2018 |
| AD Courier London Ltd | Wholesale & retail | 2025 |
| AD Food Valley Ltd | Hospitality | 2022 |
| Ad&G Tech Ltd | Information & communication | 2025 |
| Adal Global Cars Limited | Administrative & support | 2025 |
| Adam & Co Logistics Ltd | Transport & logistics | 2020 |
| Adamantium Investments Ltd | Real estate | 2025 |
| Adamo SPV CH1 Ltd | Real estate | 2021 |
| Adapt Services Limited | Administrative & support | 2001 |
| Adaptivemind Consultancy Limited | Arts & recreation | 2015 |
| Adastra Market Dryton Ltd | Wholesale & retail | 2024 |
| Adayse Childcare Ltd | Transport & logistics | 2014 |
| Adchaya Properties Limited | Real estate | 2025 |
| Addlestone Food & Wine Limited | Wholesale & retail | 2025 |
| Addlestone Supermarket Limited | Wholesale & retail | 2025 |
| Addmore Properties Holdings Ltd | Real estate | 2018 |
| Adee Enterprises Limited | Real estate | 2023 |
| Adeebia Ltd | Wholesale & retail | 2024 |
| Adel Construction and Civil Engineering Ltd. | Manufacturing | 2017 |
| Adem Medical Services Limited | Health & social care | 2004 |
| Adem Real Estate Ltd | Real estate | 2025 |
| Adems Inc Ltd | Wholesale & retail | 2022 |
| ADI Prestige Car Wash Ltd | Administrative & support | 2022 |
| Adit Homes Ltd | Real estate | 2020 |
| Adititech Limited | Information & communication | 2009 |
| ADK Technologies Ltd | Information & communication | 2026 |
| Adler Management Limited | Households | 1985 |
| Admiral Staffing Limited | Administrative & support | 2025 |
| Admiration Care Ltd | Health & social care | 2024 |
| Admire Floorings Ltd | Manufacturing | 2024 |
| Admissions International Limited | Education | 2019 |
| Adnan Assets Ltd | Real estate | 2018 |
| Adnan Noor Ltd | Wholesale & retail | 2024 |
| Adnanjan Limited | Wholesale & retail | 2024 |
| Adray Ltd | Wholesale & retail | 2023 |
| ADS E Cleaning Solution Ltd | Administrative & support | 2026 |
| Adss Transport Ltd | Administrative & support | 2017 |
| Advance Facilities Ltd | Construction | 2025 |
| Advance Properties UK Investment Ltd | Real estate | 2026 |
| Advanced Double Glazing Company UK Ltd | Construction | 2025 |
| Advanced Efficiency Ltd | Transport & logistics | 2016 |
| Advanced GAS Utilities Ltd | Construction | 2021 |
| Advanced Innovations Ltd | Information & communication | 2022 |
| Advanced Property Developments Ltd | Real estate | 2018 |
| Advantage Removals Ltd | Transport & logistics | 2010 |
| Aerobuild Limited | Construction | 2025 |
| Aerolinks Travel Limited | Administrative & support | 2014 |
| Aesn Holdings Ltd | Financial services | 2025 |
| Aesthetic Homes Limited | Construction | 2014 |
| Aesthetics by DR Jemma Ltd | Health & social care | 2020 |
| AF Furniture Limited | Wholesale & retail | 2020 |
| AF Khalid Ltd | Wholesale & retail | 2024 |
| AFC Conclave Limited | Hospitality | 2025 |
| Afenso Ltd | Information & communication | 2025 |
| Afghan Diaspora Jirga Ltd | Professional & scientific | 2025 |
| Afghan Restaurant Limited | Hospitality | 2014 |
| African Healing Hands Organization Ltd | Health & social care | 2020 |
| African Mama Dance Limited | Arts & recreation | 2020 |
| African Salihiya Cargo and Clearing Limited | Transport & logistics | 2011 |
| Afro-Caribbean Deluxe Catering Ltd | Hospitality | 2025 |
| AG Cars Hire Ltd | Administrative & support | 2025 |
| AG Cars West London Ltd | Wholesale & retail | 2026 |
| AG Chauffeurs Ltd | Transport & logistics | 2025 |
| AG Food and Wine Ltd | Wholesale & retail | 2019 |
| AG International Limited | Wholesale & retail | 2015 |
| AG Motor Trade Ltd | Wholesale & retail | 2024 |
| AG Prime Construction Ltd | Construction | 2025 |
| AG Scaffolding Ltd | Construction | 2025 |