| Agvdoc Ltd | Professional & scientific | 2026 |
| AH @ RH Property Ltd | Construction | 2022 |
| Ahgv Repairs & Maintenance Ltd | Wholesale & retail | 2022 |
| AI 3D Ltd | Transport & logistics | 2019 |
| Aimm Ltd | Real estate | 2007 |
| Ainscough Data Consultancy Limited | Information & communication | 2026 |
| Airline Ready Training Ltd | Education | 2026 |
| Airpro UK Limited | Energy | 2004 |
| Aisha Village Limited | Hospitality | 2019 |
| AJ Imperium Ltd | Administrative & support | 2025 |
| AJB Tile and Stone Ltd | Construction | 2020 |
| AJD Tech Ltd | Information & communication | 2025 |
| AKA the TAP & Table Co. Ltd | Hospitality | 2025 |
| AKC Logistics Ltd | Wholesale & retail | 2012 |
| AKF Contractors Limited | Construction | 2022 |
| Aladdin's Cave Ltd | Wholesale & retail | 2017 |
| Alan Nuttall Trustees Limited | Professional & scientific | 2015 |
| ALB Property Partners Ltd | Hospitality | 2025 |
| Albert Gardens Freehold Ltd | Administrative & support | 2015 |
| Aldermans Green Management Services (Coventry) Limited | Households | 2018 |
| Alexander Interiors (Midlands) Ltd | Construction | 2025 |
| Alien Prose UK Limited | Information & communication | 2023 |
| Alinmihai Trans Ltd | Transport & logistics | 2022 |
| ALL About Plumbing and Heating Ltd | Construction | 2021 |
| ALL Cars Repaired Ltd | Wholesale & retail | 2010 |
| ALL Facades UK (Holdings) Limited | Financial services | 2024 |
| ALL Home Maintenance UK Ltd | Other services | 2025 |
| ALL Hours Recruitment Limited | Administrative & support | 2025 |
| ALL Makes Garage Midlands Limited | Wholesale & retail | 2007 |
| ALL-4 Power Ltd | Wholesale & retail | 2014 |
| Allevo Construction Ltd | Construction | 2023 |
| Allsorts Nursery School Ltd | Health & social care | 2013 |
| ALP Trans Ltd | Transport & logistics | 2018 |
| Alpha EYE Clinic Limited | Health & social care | 2022 |
| Alpha Injection Moulding Limited | Manufacturing | 2022 |
| Alpha Kilo Accord Limited | Wholesale & retail | 2024 |
| Alpha Seats Limited | Manufacturing | 2025 |
| Alpine Course Setters Limited | Other services | 2023 |
| Alpine Performance Cars Limited | Wholesale & retail | 2023 |
| Altitude Climate Solutions Ltd | Construction | 2026 |
| Alynd Ltd | Professional & scientific | 2023 |
| Am-Cx Ltd | Professional & scientific | 2025 |
| AMA Procs Ltd | Administrative & support | 2016 |
| Amaanah Consultancy Ltd | Other services | 2025 |
| Ambion Contractors Ltd | Construction | 2013 |
| Ambrite IT Limited | Information & communication | 2014 |
| American Nails and Beauty Salon Ltd | Other services | 2017 |
| AMM Design Consultancy Ltd | Professional & scientific | 2018 |
| AMS Aesthetics and Beauty Ltd | Other services | 2024 |
| AMS Group (Warwick) Limited | Financial services | 2019 |
| AMY Hair Limited | Other services | 2023 |
| Ando Polish Shop Ltd | Wholesale & retail | 2024 |
| Andreea Ciprian Ltd | Wholesale & retail | 2015 |
| Andrew Twigg & Associates Limited | Professional & scientific | 2003 |
| Anfit Ltd | Real estate | 2024 |
| Anker Bridge Ltd | Real estate | 2025 |
| Ansell Consulting Ltd | Professional & scientific | 2024 |
| Ansley Village Farm Limited | Construction | 2024 |
| Anstar 68 Ltd | Other services | 2026 |
| AO (Recruitment) Consulting Ltd | Administrative & support | 2026 |
| AO Consulting Services Limited | Wholesale & retail | 2017 |
| AO Films Ltd | Information & communication | 2025 |
| AOS Decorators Ltd | Construction | 2020 |
| Apdent Limited | Health & social care | 2022 |
| Apex Management Group Limited | Professional & scientific | 2024 |
| Applebee's Catering Limited | Hospitality | 2016 |
| Approved Car & Commercial Centre Ltd | Wholesale & retail | 2024 |
| Apps Ledger Accountancy Limited | Professional & scientific | 2025 |
| APRIL12 Limited | Transport & logistics | 2023 |
| Aqua Tech UK Solutions Ltd | Professional & scientific | 2025 |
| ARCAS13 Limited | Professional & scientific | 2022 |
| Archer Cottage Ltd | Households | 2021 |
| Archer Court (Management Company) NO.1 Limited | Households | 2009 |
| Archie Clark Racing Ltd | Arts & recreation | 2025 |
| Architectural and Design Management Limited | Professional & scientific | 2024 |
| Architectural Vistadesigns Ltd | Professional & scientific | 2016 |
| Archival & Conservation Materials Limited | Manufacturing | 2013 |
| Ardua Ventures Ltd | Information & communication | 2012 |
| Arko Care Limited | Health & social care | 2024 |
| Arlie Media Limited | Professional & scientific | 2019 |
| Armcom Limited | Professional & scientific | 2010 |
| Armstrongs Mortgage Solutions Limited | Financial services | 2024 |
| Aroma Cleaning UK Limited | Administrative & support | 2011 |
| Aroma Formulations Ltd | Extraterritorial | 2013 |
| Aromatic Refreshments Limited | Wholesale & retail | 2009 |
| Arreece Properties SPV Limited | Real estate | 2020 |
| Arrow Precision Engineering Limited | Manufacturing | 1976 |
| Artisan Turkish Barber Ltd | Other services | 2023 |
| AS Patryk Chomicz Ltd | Wholesale & retail | 2016 |
| AS Sports Agency Limited | Arts & recreation | 2018 |
| ASA Prime Properties Limited | Real estate | 2025 |
| Ashby Court Limited | Households | 1989 |
| Ashby Engineering Systems Ltd | Administrative & support | 2016 |
| Ashby Road Developments Limited | Construction | 2015 |
| Ashby Tavern 2018 Limited | Hospitality | 2018 |
| ASK Tax and Accountancy Limited | Professional & scientific | 2013 |
| ASP Electro-Technology Limited | Professional & scientific | 2002 |
| Aspire Physiotherapy Care Limited | Health & social care | 2025 |
| Assa International Ltd | Real estate | 2021 |
| Assured FD Limited | Professional & scientific | 2022 |