| (Mbc)Master Building Construction Ltd | Construction | 2025 |
| 09477781 Limited | Real estate | 2015 |
| 1 Hillside Road Limited | Real estate | 2010 |
| 1-4 Mill Court Limited | Administrative & support | 2001 |
| 10 ST James Terrace (Freehold) Limited | Households | 2025 |
| 11, ST. Cuthberts Road Limited | Extraterritorial | 1985 |
| 123 Anaesthesia Limited | Health & social care | 2024 |
| 13 Idea Limited | Arts & recreation | 2026 |
| 18 Dufferin Street (Management) Limited | Real estate | 1997 |
| 20 Alexandra Road Freehold Company Limited | Households | 2025 |
| 23 Dollis Avenue (1998) Limited | Households | 1998 |
| 24 RG Limited | Other services | 2015 |
| 28 Flowers Ltd | Wholesale & retail | 2024 |
| 29 Poultney Close Limited | Real estate | 2026 |
| 2ROKCONS Ltd | Construction | 2023 |
| 31 Waverley Road LLP | | 2025 |
| 33-64 Beaufort Mansions (Freehold) Limited | Households | 2011 |
| 360 Degree Worshipper CIC | Arts & recreation | 2025 |
| 3BB Capital Limited | Real estate | 2020 |
| 4 Compayne Gardens Limited | Real estate | 2006 |
| 4 Farm Close Limited | Real estate | 2020 |
| 4 ST Gabriel's Road Freehold Limited | Households | 2019 |
| 40 Sutherland Avenue Freehold Limited | Households | 2017 |
| 43 Colville Gardens Freehold Limited | Households | 2020 |
| 47 Warwick Avenue Limited | Professional & scientific | 2005 |
| 4D Developments Ltd | Extraterritorial | 2016 |
| 4D Plant Ltd | Administrative & support | 2015 |
| 4D RC Frame and Groundworks Ltd | Extraterritorial | 2016 |
| 4D Structures Limited | Construction | 2013 |
| 515 Capital Limited | Other services | 2012 |
| 59/61 Black BOY Wood (Freehold) Limited | Households | 2012 |
| 5SPC Limited | Households | 2022 |
| 61 Blomfield Road Limited | Hospitality | 2014 |
| 63 Edbrooke Road Limited | Households | 2021 |
| 70 X More Limited | Transport & logistics | 2024 |
| 8 & 10 Totteridge Avenue High Wycombe Limited | Households | 2006 |
| 8A Aberdeen Road Ltd | Real estate | 2017 |
| A Swain Consulting Limited | Professional & scientific | 2010 |
| A & a Podiatrists Limited | Health & social care | 2010 |
| A G S Acrylics Ltd | Wholesale & retail | 2000 |
| A Silver Services Ltd | Professional & scientific | 2016 |
| A&R Shine Ltd | Health & social care | 2024 |
| A-E Medicine Ltd | Health & social care | 2021 |
| A-Jazaj Ltd | Health & social care | 2016 |
| A. Whitham Decorating Contractors Limited | Construction | 2005 |
| A.& R.Clements(Investments)Limited | Real estate | 1962 |
| A.M.H. Properties Limited | Construction | 1970 |
| AAG Luxury Group Limited | Wholesale & retail | 2026 |
| Aamcha Catering Ltd | Hospitality | 2023 |
| Aarch Properties Ltd | Real estate | 2018 |
| Aavya Holdings Ltd | Real estate | 2024 |
| Abati Solutions Ltd | Transport & logistics | 2021 |
| Abbey County Limited | Manufacturing | 2023 |
| Aben Wines Limited | Wholesale & retail | 1992 |
| Abercorn International Limited | Financial services | 2017 |
| ABK Executive Chauffeurs Limited | Transport & logistics | 2025 |
| Acecroft Management Limited | Administrative & support | 2008 |
| ACJ Accountants Limited | Administrative & support | 2024 |
| ACT for Change | Education | 2005 |
| Adam Baetu Education Ltd | Other services | 2021 |
| Adam Hewitt Catering Ltd | Hospitality | 2016 |
| Addichat Limited | Health & social care | 2016 |
| Additalk Limited | Health & social care | 2026 |
| ADM 53 Ltd | Professional & scientific | 2025 |
| Adovan 25 Limited | Other services | 2016 |
| Adquiro Ltd | Real estate | 2016 |
| Adrian George Estates Limited | Other services | 2017 |
| ADS Contract Services Limited | Construction | 2018 |
| Advanced Reports Ltd | Professional & scientific | 2020 |
| Adventure Generation Ltd | Education | 2025 |
| Advisium Limited | Information & communication | 2025 |
| Agile Tech Systems Ltd | Information & communication | 2019 |
| AH Business and Finance Services Limited | Professional & scientific | 2010 |
| AHP Consulting Limited | Health & social care | 2013 |
| AI Chauffeur's Ltd | Transport & logistics | 2025 |
| Aisst Ltd | Other services | 2014 |
| AJD Catering Services Ltd | Hospitality | 2024 |
| AKE Consultancy Limited | Information & communication | 2010 |
| AL Sulttan Medical Services Limited | Health & social care | 2024 |
| Albert Villas(Plymouth) Limited | Households | 2014 |
| Alcorn Ltd. | Professional & scientific | 2002 |
| Aldenham Golf & Country Club Limited(The) | Arts & recreation | 1984 |
| Aleph One Solutions Ltd | Information & communication | 2019 |
| Alexander Craig Investments Limited | Real estate | 2005 |
| Alfreton Capital Holdings | Financial services | 2024 |
| Alfreton Capital LLP | | 2013 |
| Alfreton Capital Management Limited | Financial services | 2010 |
| ALK Transport Ltd | Transport & logistics | 2026 |
| Allclearsupport Ltd | Information & communication | 2000 |
| Allea Lodge Limited | Real estate | 2026 |
| Allmond Bell Ltd. | Extraterritorial | 2013 |
| Allprops 2.0 Ltd | Information & communication | 2026 |
| Alma Pre-Cast Concrete Company Limited | Real estate | 1953 |
| Alpha CK Ventures Ltd | Real estate | 2014 |
| Alta Transform Ltd | Professional & scientific | 2025 |
| Altenar Software Limited | Information & communication | 2020 |
| Amandagat Beach Resort Ltd | Hospitality | 2025 |
| Amaya Care Homes (Capel) Limited | Health & social care | 2023 |
| Amaya Care Homes (Maesteg) Limited | Health & social care | 2003 |
| Amaya Care Homes (TY Coch) Limited | Health & social care | 2024 |