| 04439151 Limited | Transport & logistics | 2002 |
| 1.RISK Solutions Consulting Limited | Professional & scientific | 2026 |
| 111 Park Road Ltd | Real estate | 2018 |
| 113 London Road Management Limited | Households | 2016 |
| 113, 115-117 London Road Limited | Households | 2016 |
| 115-117 London Road Management Limited | Households | 2016 |
| 1MORE Europe Ltd | Wholesale & retail | 2022 |
| 2020 GAS Ltd | Energy | 2017 |
| 215 Upper Halliford Road Management Company Limited | Other services | 2013 |
| 222PROCURE Ltd | Professional & scientific | 2009 |
| 39 Horsford Road Management Company Limited | Households | 2002 |
| 420 Consulting Ltd | Information & communication | 2021 |
| 66 Hampton Road Bristol Management Company Limited | Households | 1983 |
| 71 Green Lane Freehold Limited | Real estate | 2015 |
| 76 Garden Road Limited | Real estate | 2005 |
| A & J Skips and Sons Limited | Water & waste | 2018 |
| A & N Gibbins Ltd | Education | 2009 |
| A & R Shah Ltd | Transport & logistics | 2007 |
| A 2 Z MED Ltd | Health & social care | 2013 |
| A S Transport Limited | Transport & logistics | 2012 |
| A Star Experience Limited | Arts & recreation | 2021 |
| A Wilson Roofing Limited | Construction | 2022 |
| A. Joyce & SON Limited | Financial services | 1965 |
| A.G.G. Solutions Ltd | Professional & scientific | 2011 |
| A.R.D Consulting Limited | Information & communication | 2014 |
| A.S.L. Personnel Limited | Administrative & support | 1995 |
| A1 Surfacing Ltd | Manufacturing | 2006 |
| Aariv Group Ltd | Information & communication | 2018 |
| AC Electricks Ltd | Construction | 2006 |
| Accounting Services Direct Limited | Extraterritorial | 2008 |
| Accurate Brickwork Solutions Ltd | Construction | 2018 |
| Acpc Associates Limited | Professional & scientific | 2021 |
| Adparatio Muneris Limited | Professional & scientific | 2015 |
| ADR ( Automotive Delivery Recovery) Ltd | Transport & logistics | 2020 |
| Advanced Property Services Limited | Construction | 2006 |
| AE Geosciences Limited | Mining & quarrying | 2019 |
| AEK Limited | Information & communication | 2025 |
| Africa-Reps Limited | Professional & scientific | 1998 |
| AFS Twickenham Marine Ltd | Transport & logistics | 2012 |
| Agatha Group Limited | Wholesale & retail | 2023 |
| AHB Services Limited | Health & social care | 2020 |
| AHH & Gardening Limited | Administrative & support | 2025 |
| AIP Investments Limited | Real estate | 2020 |
| Air Sea 1 Ltd | Other services | 2022 |
| Aixila Ltd | Professional & scientific | 2026 |
| AJ Maccormac Consulting Ltd | Real estate | 2014 |
| AJM Property Ltd | Real estate | 2019 |
| AJW Experience Group Limited | Information & communication | 2022 |
| Al-Aedroos Traders Limited | Wholesale & retail | 2009 |
| Al-Mo Limited | Transport & logistics | 2023 |
| Alan James & Associates Limited | Professional & scientific | 2011 |
| Alan James & Co (2017) Limited | Extraterritorial | 1998 |
| Alderley Projects Limited | Professional & scientific | 2014 |
| Alison Diss Nutrition Limited | Health & social care | 2024 |
| Alivelogic Limited | Professional & scientific | 2011 |
| Alkerton Transport Ltd | Transport & logistics | 2014 |
| ALL Home Rentals Limited | Real estate | 2012 |
| ALL Seasons Garden Services Sunbury Ltd | Administrative & support | 2020 |
| Aloha Rental Properties Ltd | Real estate | 2022 |
| ALPHA1POINT Limited | Information & communication | 2014 |
| ALT. Supply Consulting Limited | Professional & scientific | 2014 |
| Alternation Projects Ltd | Professional & scientific | 2015 |
| Alternative Resources Limited | Professional & scientific | 2000 |
| AM Environmental Services Limited | Administrative & support | 2016 |
| AM Security Solutions Ltd | Administrative & support | 2017 |
| Amazing Traders Plus Ltd | Wholesale & retail | 2026 |
| Amber Court (Staines) Management Limited | Households | 1966 |
| Ames Holdings Limited | Administrative & support | 2005 |
| AMS Property Development Limited | Professional & scientific | 2008 |
| Anderson Business Travel Limited | Administrative & support | 1985 |
| Andrew Banning Sales Solutions Ltd | Professional & scientific | 2016 |
| Andrew JAS Ltd | Construction | 2019 |
| Andro-Flex Limited | Mining & quarrying | 2018 |
| Andy Allen Interiors Limited | Construction | 2022 |
| Andy Irons Ltd | Professional & scientific | 2015 |
| Andy Matthews Driving Services Limited | Other services | 2007 |
| Anthony ZG Ltd | Construction | 2015 |
| Anuneev Ltd | Professional & scientific | 2025 |
| Apex Impact Ltd | Wholesale & retail | 2025 |
| Apex Scrap and Waste Solutions Ltd. | Wholesale & retail | 2025 |
| APG Security & Data Ltd | Construction | 2025 |
| Apis Heating Ltd | Construction | 2026 |
| APTI66 Limited | Real estate | 2018 |
| AR IT Consultancy Ltd | Information & communication | 2015 |
| Ardiya Enterprise Ltd | Wholesale & retail | 2023 |
| Arise Christian World Action | Information & communication | 2015 |
| Arjun Mistry Ltd | Professional & scientific | 2020 |
| ARK Distri Ltd | Wholesale & retail | 2019 |
| Arlie Construction Limited | Construction | 2025 |
| Armando Testa International Limited | Professional & scientific | 1998 |
| Art Decoration Ltd | Construction | 2018 |
| Artpause Ltd | Arts & recreation | 2012 |
| ASH Carpentry & Construction Limited | Construction | 2018 |
| Ashi Makicha Ltd | Hospitality | 2025 |
| ASP Developments Ltd | Construction | 2020 |
| Aspecture Limited | Professional & scientific | 1999 |
| Aspirefit Ltd | Arts & recreation | 2020 |
| Astleham Limited | Real estate | 2017 |
| Atlantic UK Group Ltd | Construction | 2007 |
| Augur Ltd | Information & communication | 2023 |