| 1 CUT Carpentry Limited | Construction | 2026 |
| 1 Lauderdale Road Limited | Households | 2012 |
| 1 Long Street Property Management Limited | Households | 2025 |
| 117 Chesterton Road Limited | Households | 2004 |
| 12 Ashcroft Road Management Company Limited | Real estate | 2022 |
| 180 Randolph Avenue Management Company Limited(The) | Households | 1978 |
| 19 Colville Terrace Limited | Households | 1993 |
| 21 Elgin Crescent Limited | Households | 1999 |
| 24 Warrington Crescent Owners Limited | Professional & scientific | 2006 |
| 25 Warrington Crescent (Management) Limited | Households | 1990 |
| 26-28 Warrington Crescent Limited | Real estate | 1982 |
| 27 Warrington Crescent Limited | Households | 1984 |
| 30 Warrington Crescent Limited | Households | 1985 |
| 32 Warrington Crescent Limited | Households | 1982 |
| 35 Stockwell Road Limited | Extraterritorial | 2000 |
| 4 Long Street Management Co Limited | Households | 2017 |
| 4 Warrington Crescent Limited | Households | 1984 |
| 42 Warrington Crescent Limited | Households | 1994 |
| 46 Pembridge Villas Limited | Households | 2014 |
| 4IR Solutions Limited | Information & communication | 2018 |
| 5 Digital Ltd | Manufacturing | 2020 |
| 62 Warrington Crescent Limited | Professional & scientific | 1983 |
| 7 Rutland Mews Limited | Administrative & support | 2014 |
| 70 Eaton Place Management Limited | Extraterritorial | 2012 |
| 77 Eaton Place Limited | Real estate | 1998 |
| 7NORTHFIELD Projects Limited | Administrative & support | 2014 |
| 7SEC Ltd | Information & communication | 2023 |
| 83 Warrington Crescent Limited | Households | 1982 |
| 9 West Eaton Place (Management) Limited | Households | 2007 |
| A J Precast Limited | Construction | 2017 |
| A Step Limited | Professional & scientific | 2015 |
| A VS. B Creative Ltd | Professional & scientific | 2025 |
| A Waterhouse Business Ltd | Information & communication | 2022 |
| A&J Properties Ltd | Real estate | 2015 |
| A.G. Carrick Limited | Wholesale & retail | 1988 |
| A.H. Direct Ltd | Extraterritorial | 2007 |
| A.M Watkinson Ltd | Manufacturing | 2023 |
| Abinger Watches Ltd | Professional & scientific | 2025 |
| ABQ Advisory Ltd | Extraterritorial | 2025 |
| Access Direct Services Limited | Construction | 2015 |
| Acclaim Biomedical Consulting Ltd | Professional & scientific | 2014 |
| Accurate Narrative Limited | Professional & scientific | 2022 |
| Acoustic Energy Loudspeakers Limited | Manufacturing | 2017 |
| Acoustic Energy Ltd | Manufacturing | 2022 |
| Acreclose Limited | Financial services | 2014 |
| ADH Aviation Training Limited | Other services | 2016 |
| Adora Wealth Management Limited | Professional & scientific | 2024 |
| Advanced Fuel Technologies UK Limited | Professional & scientific | 2010 |
| Affordable Accommodation (South West) Ltd | Real estate | 2015 |
| Affordable Appliances Direct Limited | Wholesale & retail | 2000 |
| AG Pubs Ltd | Hospitality | 2014 |
| AH Roofing Maintenance Ltd | Construction | 2025 |
| Ailsa Consulting Limited | Professional & scientific | 2020 |
| AJH Procurement Limited | Administrative & support | 2013 |
| AJT Consultancy Limited | Professional & scientific | 2020 |
| Alby's Property Solutions Limited | Extraterritorial | 2021 |
| Alexander and Alexander Bespoke Educational Consultants Limited | Professional & scientific | 2023 |
| Allan Pollok-Morris Limited | Information & communication | 2001 |
| AM Auto Care Limited | Wholesale & retail | 2022 |
| AM Auto Care Subco Limited | Wholesale & retail | 2025 |
| AMA BMS Services Limited | Administrative & support | 2017 |
| Amadeus Boatworks Limited | Other services | 2009 |
| Ambeya Ltd | Information & communication | 2023 |
| AML Dynamics Limited | Administrative & support | 2015 |
| Ammazin Limited | Extraterritorial | 2014 |
| Ammy Davies Education Limited | Education | 2023 |
| Ampworks Ltd | Construction | 2025 |
| Amtilch Investments Limited | Other services | 2022 |
| Ananda Wellness Ltd | Health & social care | 2025 |
| ANC Access Limited | Administrative & support | 2017 |
| Annabelle Mason Consultancy Limited | Professional & scientific | 2019 |
| Annie Waite Limited | Professional & scientific | 2002 |
| Apew Building Limited | Construction | 2020 |
| Apew Holdings Limited | Financial services | 2020 |
| Apex Project Management Limited | Professional & scientific | 2012 |
| Applied Acumen Limited | Professional & scientific | 2003 |
| Arbuthnott Ladenburg Partnership Limited | Professional & scientific | 1988 |
| Arbuthnott Property Limited | Construction | 2013 |
| Armadillo Bookkeeping Limited | Professional & scientific | 2011 |
| Armlac Limited | Professional & scientific | 2016 |
| Aromi Investments Ltd | Manufacturing | 2019 |
| ARX Ecology Limited | Manufacturing | 2025 |
| Ashbrown Limited | Professional & scientific | 2001 |
| Ashdown Enterprises Limited | Health & social care | 2024 |
| Askwith Electrical Ltd | Construction | 2018 |
| Asphero Limited | Professional & scientific | 2016 |
| Asset Protection & Licencing Limited | Manufacturing | 2020 |
| Aston S&I Ltd | Professional & scientific | 2022 |
| Atley Construction Ltd | Construction | 2021 |
| Austen Group Limited | Wholesale & retail | 2022 |
| Austin Design Works Limited | Professional & scientific | 2002 |
| Autus Commercial Solutions Limited | Professional & scientific | 2009 |
| Avaero Capital Partners Ltd | Professional & scientific | 2014 |
| Avlan Construction Limited | Construction | 2019 |
| Avon Construction Services Limited | Construction | 1981 |
| AW 133 Ltd | Manufacturing | 2025 |
| AW Storage Limited | Transport & logistics | 2015 |
| Bailiff's Cottage Ltd | Real estate | 2014 |
| Bath-Electrical Ltd | Construction | 2011 |
| BB Surveyors Limited | Professional & scientific | 2023 |