| 17SIX Management Ltd | Professional & scientific | 2020 |
| 2 D Developments Limited | Construction | 2016 |
| 3 Phase Records Limited | Wholesale & retail | 2025 |
| 3 Spires Solutions Ltd | Construction | 2020 |
| 3LC Brewing Limited | Manufacturing | 2025 |
| 3T GAS Maintenance Limited | Construction | 2015 |
| 4 Property Maintenance Ltd | Construction | 2025 |
| 4 Wheelz Limited | Education | 1997 |
| A & a Erection Limited | Manufacturing | 1997 |
| A & H Chiropractic Limited | Health & social care | 2022 |
| A & J Vehicle Repairs Ltd | Wholesale & retail | 2018 |
| A Bland Construction Ltd | Construction | 2019 |
| A EYE Security Limited | Administrative & support | 2026 |
| A F Holdings (AFH) Limited | Financial services | 2015 |
| A S Plumbing & Heating Ltd | Construction | 2009 |
| A Star Barber (Swan's) Ltd | Other services | 2024 |
| A Star Building Contractors Limited | Construction | 2018 |
| A Star Home & Commercial Building Limited | Construction | 2023 |
| A. H. Coins Ltd | Wholesale & retail | 2015 |
| A.D.E. Accountancy Limited | Professional & scientific | 2012 |
| A.H.Dennis Limited | Wholesale & retail | 1960 |
| A.P.H. (Electrical Contractors) Ltd | Construction | 2003 |
| A.R.L. Design and Welding Limited | Manufacturing | 2001 |
| A1 Business Partners Ltd | Professional & scientific | 2020 |
| A2B Business Consulting Ltd | Professional & scientific | 2020 |
| A2B Comms Ltd | Information & communication | 2021 |
| Aashiqs Restaurant Ltd | Hospitality | 2025 |
| AB Air Conditioning Ltd | Energy | 2026 |
| Abronzatura Limited | Administrative & support | 2017 |
| Absolute Vehicle Paint Repairs Ltd | Wholesale & retail | 2026 |
| Absolute Vending UK Ltd | Wholesale & retail | 2025 |
| Accomplish Logistic Training Limited | Wholesale & retail | 2014 |
| Aceofshadespainters Ltd | Construction | 2025 |
| Ackee Tree UK Services Limited | Transport & logistics | 2025 |
| Acme Self Store Limited | Professional & scientific | 2002 |
| Acorn Group Limited | Wholesale & retail | 1948 |
| Acorn Meadows (Brailsford) Management Company Limited | Households | 2019 |
| Adam Birchall Chef Services Ltd | Hospitality | 2022 |
| Adams Property Services Ltd | Real estate | 2012 |
| Addfield Environmental Systems Limited | Manufacturing | 2008 |
| Addfield Projects Limited | Manufacturing | 2021 |
| Addictions 2 Limited | Other services | 2022 |
| Advanced Care Solutions Ltd | Health & social care | 2023 |
| Advanced Steel Fabrications Ltd | Manufacturing | 2023 |
| Advantage Medtech Limited | Administrative & support | 2011 |
| Affinity Homecare Holdings Limited | Financial services | 2009 |
| Affinity Homecare Limited | Health & social care | 2006 |
| Agri Web Media Limited | Information & communication | 2013 |
| Agrimow Ltd | Manufacturing | 2020 |
| AI Cctv Ltd | Administrative & support | 2024 |
| Airgun Training & Education Organisation Limited | Education | 2016 |
| Ajmdistribution Ltd | Wholesale & retail | 2024 |
| ALB Accounting Services Ltd | Professional & scientific | 2022 |
| Albatross (UK) Limited | Construction | 2001 |
| Alderley Day Nursery Limited | Education | 2006 |
| Aldridge Fabrications (AF) Limited | Manufacturing | 2015 |
| Aldridge Fireplaces Limited | Construction | 2020 |
| Aldridge Piling Equipment (Hire) Company Limited | Administrative & support | 2018 |
| Aldridge Windows UK Ltd | Construction | 2003 |
| Alifab Solutions Limited | Professional & scientific | 2012 |
| Allen & Payne Casting Limited | Administrative & support | 2025 |
| Allune Nails Loughborough Ltd | Other services | 2022 |
| Alocious Limited | Real estate | 2017 |
| Alpaca Days OUT Limited | Arts & recreation | 2021 |
| Amber Build & Designz Ltd | Construction | 2024 |
| Ampla Homes Ltd | Construction | 2025 |
| Amserve Ltd | Manufacturing | 2023 |
| Ananas Group Ltd | Real estate | 2021 |
| Andelen IT Consulting Ltd | Information & communication | 2009 |
| Anderson GL Limited | Real estate | 2001 |
| Andersunds Mobile Catering Limited | Hospitality | 2024 |
| Andrew Hope Investment Limited | Financial services | 2008 |
| Angela Jones Consultancy Ltd | Arts & recreation | 2019 |
| Anglo Accounting Limited | Professional & scientific | 2004 |
| Anglo Alliance Factors Limited | Financial services | 2004 |
| ANM Commercial Limited | Professional & scientific | 2025 |
| Anpro Limited | Construction | 1999 |
| ANR Forecourts Ltd | Wholesale & retail | 2018 |
| AP SD One Limited | Wholesale & retail | 2025 |
| AP Vehicle Solutions Ltd | Wholesale & retail | 2021 |
| Aparts Services Ltd | Wholesale & retail | 2008 |
| APE Hammerman Limited | Manufacturing | 2012 |
| Apex Electrical Installations Ltd | Construction | 2026 |
| Apex View Financial Planning Ltd | Professional & scientific | 2024 |
| Approved Valeting UK Limited | Transport & logistics | 2012 |
| Aquarius Kitchens and Bathrooms Burntwood Limited | Wholesale & retail | 2023 |
| Arboretum Residential Property Limited | Real estate | 2020 |
| ARC Maritime Ltd | Transport & logistics | 2020 |
| Arkem Leisure Limited | Construction | 2020 |
| ARP Consultancy Limited | Construction | 2016 |
| Art by BEX Ltd | Arts & recreation | 2024 |
| Ascot Property Holdings UK Limited | Financial services | 2018 |
| Ascot Property Lettings Limited | Real estate | 2018 |
| Ascot Property Maintenance Ltd | Construction | 2011 |
| ASH133COACHING Limited | Education | 2025 |
| Ashcroft Utilities Ltd | Professional & scientific | 2022 |
| ASP Contractors Ltd | Construction | 2022 |
| Aspark Electrical Limited | Construction | 2014 |
| Aspark Group Ltd | Construction | 2022 |
| Aspg Property Ltd | Real estate | 2022 |