| 'N'Closed Transport Ltd | Transport & logistics | 2025 |
| 10-12 Minterne Road Management Ltd | Real estate | 2018 |
| 117 Legendary Solutions Ltd | Extraterritorial | 2024 |
| 13 Buchanan Avenue Freehold Limited | Households | 2015 |
| 197 Films Limited | Information & communication | 2020 |
| 1ST Tutoring Limited | Extraterritorial | 2025 |
| 2027 Ltd | Real estate | 2011 |
| 26 Redcliffe Square Management Company Limited | Households | 1998 |
| 26 Trent Road Freehold Limited | Households | 2017 |
| 28 Shirley Park Road Limited | Hospitality | 1997 |
| 313 Group Ltd | Financial services | 2024 |
| 313 Vision Care Ltd | Health & social care | 2016 |
| 313 Vision Care Properties Ltd | Real estate | 2024 |
| 363 ST John Street Management Company Limited | Real estate | 2004 |
| 37 ST Catherines Road Management Company Limited | Households | 2013 |
| 4 Heathcote Road RTM Company Limited | Households | 2009 |
| 5 North Villas Residential Management Ltd. | Households | 2000 |
| 51 Haven Road Freehold Limited | Households | 2017 |
| 77 Alumhurst Road (Freehold) Limited | Households | 2009 |
| 80 Vines Limited | Agriculture & fishing | 2024 |
| A Squared Projects Limited | Information & communication | 2024 |
| A&M Bailey Electrical Ltd | Construction | 2026 |
| A-Fab Welding & Fabrication Limited | Extraterritorial | 2018 |
| A.A.Crawford Limited | Health & social care | 2024 |
| A.W.J. Holdings Limited | Real estate | 2018 |
| Abovo Hairdressing Limited | Other services | 2025 |
| Absolute Multimedia UK Limited | Information & communication | 2005 |
| Absolutely Productions Limited | Information & communication | 1988 |
| Absolutely Rights Limited | Professional & scientific | 2003 |
| Acex Group Ltd | Professional & scientific | 2020 |
| Acex International Limited | Professional & scientific | 2019 |
| AD Smith Properties Limited | Real estate | 2013 |
| Adam Eason College of Clinical and Experimental Hypnosis Ltd. | Information & communication | 2006 |
| Adam Sidford Gardens Limited | Administrative & support | 2026 |
| Adaptai Ltd | Professional & scientific | 2018 |
| Adele Mary Limited | Other services | 2012 |
| Admirals Walk 2000 Ltd | Households | 2000 |
| ADP Timber Products Ltd | Manufacturing | 2026 |
| Adrian Dowding Estate Agents Limited | Real estate | 2017 |
| Adventures in Movement and Breath Limited | Professional & scientific | 2001 |
| After Image Limited | Professional & scientific | 1984 |
| Agency Services (Reading) Limited | Professional & scientific | 1988 |
| AI Adaptability Coaching Ltd | Professional & scientific | 2021 |
| Air Repair Limited | Manufacturing | 2014 |
| Airborne Communications Ltd | Manufacturing | 2013 |
| AJB Management LLP | | 2020 |
| Alac Products Limited | Manufacturing | 2025 |
| Albarlo Limited | Administrative & support | 2025 |
| Alcove Entertainment Limited | Information & communication | 2006 |
| Alderholt Chapel | Other services | 2022 |
| Alderholt Leadworks Ltd | Construction | 2021 |
| Alexander Baker Ltd | Administrative & support | 2024 |
| Alexander Fell Ltd | Wholesale & retail | 2026 |
| Alfa Display & Design Limited | Professional & scientific | 2002 |
| Alison Plenderleith Consulting Limited | Administrative & support | 2015 |
| ALL the Cool Stuff Events Limited | Wholesale & retail | 2016 |
| ALL Things Being Ltd | Real estate | 2019 |
| All-Play Sports Coaching Ltd | Arts & recreation | 2012 |
| Allsopp Helikites Limited | Manufacturing | 1997 |
| Allsopp Technologies Ltd | Professional & scientific | 2012 |
| Almak Services Limited | Manufacturing | 2008 |
| Alphabet Westbourne Limited | Health & social care | 2022 |
| Alum Court Limited | Households | 1957 |
| AM Business Consulting Ltd | Professional & scientific | 2024 |
| Amble Rentals Ltd | Administrative & support | 2024 |
| Amigo Redlynch Limited | Hospitality | 2020 |
| Amigo Taverns Limited | Hospitality | 2018 |
| Amplify YOU Limited | Professional & scientific | 2024 |
| AN Invisible Hand Limited | Financial services | 2024 |
| Anamro Ltd | Real estate | 2019 |
| Ancillary Developments Limited | Real estate | 1970 |
| Angelia Communications Limited | Information & communication | 2012 |
| Animals’ Voice | Education | 2025 |
| Annie Mcgeoch Limited | Information & communication | 2011 |
| Apocalypso Pictures Cold WAR Limited | Information & communication | 2016 |
| Apocalypso Pictures Limited | Arts & recreation | 1998 |
| ARC Capital Limited | Real estate | 1999 |
| ARC Force Construction Ltd | Manufacturing | 2014 |
| Archers Mansions Limited | Households | 1983 |
| Arctiko Limited | Manufacturing | 2023 |
| Argo Construction Limited | Construction | 2009 |
| Argon Electrical Ltd | Construction | 2021 |
| Arnold Electrical Contractors Ltd | Construction | 2021 |
| Arnold Electrical Contractors South Ltd | Construction | 2025 |
| Arow Consultancy Ltd | Education | 2023 |
| Arrowpoint Books Ltd | Information & communication | 2025 |
| Art Tech Dental Ceramics Ltd | Health & social care | 2018 |
| Arwal Ltd | Professional & scientific | 2023 |
| Ashburn Court Residents Company Limited | Professional & scientific | 2002 |
| Ashburn Place Management Company Limited | Households | 2004 |
| Ashridge Contracting Ltd | Agriculture & fishing | 2026 |
| Attis Rural Ltd | Professional & scientific | 2023 |
| Audio Oasis Limited | Wholesale & retail | 2016 |
| Audrey Neil Productions Limited | Information & communication | 2017 |
| AV Synergy Limited | Wholesale & retail | 2006 |
| Aviation Network Group Ltd | Other services | 2022 |
| Aviv Court Residents Company Limited | Households | 1980 |
| Avon Building Services Limited | Construction | 2005 |
| Avon Valley Nurseries Limited | Other services | 2002 |
| Avonbridge Specialist Repair Services Ltd | Manufacturing | 2003 |