| 1 Storage Ltd | Transport & logistics | 2021 |
| 1021L Limited | Transport & logistics | 2023 |
| 11 Clifton Road LLP | | 2023 |
| 11 Manor Road RTM Company Limited | Real estate | 2008 |
| 12-12A Easton Road Management Limited | Households | 2020 |
| 15-17 Mildmay Road Ltd | Construction | 2025 |
| 1SCAFF LAB Ltd | Construction | 2020 |
| 2-6 Briscoe Road Freehold Ltd | Households | 2024 |
| 223 ST. Margarets Road Twickenham Flats Management Limited | Households | 1989 |
| 5 Markwick Terrace Limited | Households | 1997 |
| 7 to 7 Solutions Limited | Construction | 2012 |
| 7GRSG Limited | Professional & scientific | 2019 |
| A & C Nails Spa Witham Ltd | Other services | 2026 |
| A & P Designs Limited | Professional & scientific | 2003 |
| A J W Ventures Limited | Professional & scientific | 2020 |
| A Matter of Security (Patrols) Ltd | Other services | 2016 |
| A Matter of Security Group Limited | Administrative & support | 2019 |
| A New PIN Ltd. | Wholesale & retail | 2015 |
| A&A Bespoke Landscapes & Groundwork Limited | Construction | 2024 |
| A&D Propco Limited | Real estate | 2018 |
| A-Touch Bookkeeping Ltd | Hospitality | 2020 |
| A.B.S Contracts Limited | Construction | 2025 |
| A.C.C. Freight Management Limited | Extraterritorial | 2021 |
| A.G.W. Trading Limited | Wholesale & retail | 2018 |
| A.M.B Classics Limited | Wholesale & retail | 2012 |
| A1 Property Restorations Ltd | Construction | 2024 |
| A2B Lounge Ltd | Wholesale & retail | 2025 |
| AAP Waste Clearance Ltd | Water & waste | 2012 |
| Aaron ESH Ltd | Professional & scientific | 2022 |
| Abbey Audio Visual Ltd | Information & communication | 2024 |
| Abbey Building Services & Maintenance Limited | Construction | 2005 |
| Abbey Companies Ltd | Financial services | 2024 |
| Abbey Doors & Windows Ltd | Construction | 2024 |
| Abendana Enterprises Limited | Manufacturing | 1981 |
| Aberdeen Internet Services Limited | Professional & scientific | 1995 |
| Abington Park Investments Limited | Construction | 2021 |
| Ace Rail Assets Consultants Ltd | Construction | 2026 |
| Acme Seals Limited | Manufacturing | 1928 |
| Acme Solutions London Limited | Information & communication | 2010 |
| Aconda Industrial Carriers Limited | Manufacturing | 2017 |
| Actitrac Software Limited | Administrative & support | 2008 |
| ADD Digital Ltd | Professional & scientific | 2025 |
| Add-A-Tone Productions Limited | Arts & recreation | 2017 |
| Added Security Technology (London) Limited | Construction | 2006 |
| Added Value Consulting Limited | Financial services | 2005 |
| Adeshanu Ltd | Real estate | 2017 |
| Adeshanu Property Ltd | Real estate | 2019 |
| Aditus Event Tech Limited | Information & communication | 2023 |
| ADL Care Services Limited | Public administration | 2022 |
| Adminex Technologies Ltd. | Construction | 2009 |
| ADP Classic Racing Limited | Wholesale & retail | 2018 |
| Adrian Mitchell Creative Services Ltd | Professional & scientific | 2025 |
| Advanced Rework Technology Limited | Education | 2004 |
| Adwick GAS Services Limited | Construction | 2019 |
| AE Contractors Limited | Construction | 2015 |
| AEW Holdings Limited | Financial services | 2019 |
| AG IT Solutions Ltd | Information & communication | 2009 |
| AGL Care Ltd | Real estate | 2000 |
| AGW Detailing Ltd | Other services | 2019 |
| Air Heating Property Limited | Real estate | 2002 |
| Air Options Limited | Other services | 1998 |
| Air Projects Limited | Construction | 2008 |
| Airknives UK Ltd | Manufacturing | 2020 |
| Aiscout Ltd | Other services | 2026 |
| AJR Auto Electrics Ltd | Wholesale & retail | 2016 |
| AK Sports & Media Limited | Arts & recreation | 2019 |
| AKC Contracts Ltd | Construction | 2018 |
| AKS7 Retail Ltd | Wholesale & retail | 2026 |
| Akshar Technologies Ltd | Professional & scientific | 2012 |
| Al-Barr Essex Limited | Hospitality | 2018 |
| Alcaydes ROC Capital Limited | Financial services | 2018 |
| Alec Butcher Funeral Directors Limited | Other services | 2014 |
| Alektrix Ltd | Construction | 2025 |
| Alfoid Limited | Transport & logistics | 2024 |
| Alfred Mews Limited | Real estate | 2015 |
| Algarve Removals Limited | Transport & logistics | 2014 |
| ALH Consultants UK Ltd | Professional & scientific | 2026 |
| Aliwoods Limited | Manufacturing | 2014 |
| Allsorts 19 Ltd | Wholesale & retail | 2019 |
| Alrac Holdings Limited | Administrative & support | 2023 |
| Alsatian Property Management Ltd | Real estate | 2022 |
| AM Importers Limited | Administrative & support | 2017 |
| Amae London Limited | Professional & scientific | 2024 |
| Amarcol Limited | Transport & logistics | 2014 |
| Amarion Care Limited | Health & social care | 2024 |
| Amazingly Properties Ltd | Real estate | 2024 |
| AMB Developments (Essex) Ltd | Construction | 2017 |
| AMD Electrical Limited | Construction | 2002 |
| Amherst Properties (Hove) Limited | Real estate | 2022 |
| Amici Global Limited | Administrative & support | 2012 |
| Ampro Sports Equipment Co Limited | Wholesale & retail | 2018 |
| AMY Cheah Ltd | Information & communication | 2026 |
| Ananda Commodities Limited | Wholesale & retail | 1998 |
| Ancient Purity Limited | Wholesale & retail | 2011 |
| Anglia Sports Management Limited | Administrative & support | 2010 |
| Annecto UK Limited | Wholesale & retail | 2012 |
| Another Barbers Limited | Other services | 2017 |
| Another Card Show Ltd | Administrative & support | 2026 |
| Antoinette 1404 Developments Limited | Construction | 2022 |
| Apex Personal Training Ltd | Arts & recreation | 2025 |