| AF Services Limited | Extraterritorial | 2016 |
| AFD Top Transport Ltd | Transport & logistics | 2024 |
| Affordable Homes (Coventry) Ltd | Real estate | 2021 |
| Affordable Paving Ltd | Construction | 2022 |
| Affordable Vehicle Hire Ltd | Administrative & support | 2025 |
| Affordablecar Tamworth Ltd | Wholesale & retail | 2018 |
| AFL Property Management Limited | Real estate | 2017 |
| AFN Technologies Limited | Information & communication | 2025 |
| Afrifashoin Ltd | Wholesale & retail | 2022 |
| AG Renewables Limited | Construction | 2026 |
| Against the Odds Education & Awareness CIC | Education | 2022 |
| Aganor Ltd | Information & communication | 2023 |
| AGL Property Solutions Ltd | Real estate | 2025 |
| Agnieszka Swallow Limited | Professional & scientific | 2009 |
| AGR Property Investments Limited | Real estate | 2015 |
| Agricultural Plastic Recycling (APR) Ltd | Water & waste | 2017 |
| AH HA! Consulting Limited | Professional & scientific | 2019 |
| Aharris Consulting Ltd | Professional & scientific | 2023 |
| Aidneys P.A.W.S Dog Grooming Ltd | Other services | 2015 |
| Aimee Louise School of Dance Ltd | Arts & recreation | 2019 |
| Aion Communications Ltd | Information & communication | 2025 |
| Aion Holdings Ltd | Financial services | 2026 |
| Air Services Tamworth Ltd | Manufacturing | 2025 |
| Air Software Limited | Information & communication | 2014 |
| Aircon Services (Tamworth) Limited | Manufacturing | 2008 |
| Airteamimages Limited | Administrative & support | 2006 |
| AJ Apex Properties Ltd | Real estate | 2026 |
| AJ Assets Limited | Real estate | 2018 |
| AJ Nexus Global Ltd | Wholesale & retail | 2025 |
| AJ Nutrition Ltd | Wholesale & retail | 2020 |
| AJ Scaffolding Access Ltd | Construction | 2025 |
| AJC Construction (West Midlands) Ltd | Construction | 2023 |
| AJH Electrical Consultants Ltd | Professional & scientific | 2025 |
| Ajisai Limited | Arts & recreation | 2013 |
| Ajps Properties Ltd | Real estate | 2024 |
| AJS Midlands (Properties) Limited | Financial services | 2020 |
| AJS Vent Limited | Manufacturing | 2008 |
| AK Bodywork Specialists Ltd | Wholesale & retail | 2018 |
| AKC Property and Developments Ltd | Real estate | 2026 |
| AKC Property Group Ltd | Real estate | 2026 |
| AKD Rail Engineering Solutions Ltd | Construction | 2026 |
| Akegra Dryliners Ltd | Construction | 2018 |
| AKG Electrical Contractors Midlands Ltd | Construction | 2022 |
| AKM Property Rentals Ltd | Real estate | 2017 |
| AKS Vans Ltd | Wholesale & retail | 2023 |
| Akshar Corporation Ltd | Wholesale & retail | 2010 |
| AKT Building Ltd | Construction | 2023 |
| Al-Uruba Cafe Limited | Hospitality | 2019 |
| Alamai Property Ltd | Extraterritorial | 2025 |
| Alarm Systems Greater Midlands Limited | Administrative & support | 2000 |
| Alaska Blue Limited | Information & communication | 2026 |
| Albert Restaurant Ltd | Hospitality | 2023 |
| ALC Rentals Ltd | Real estate | 2026 |
| Alcester Builders Limited | Construction | 2025 |
| Alchemy Moon Tattoo Collective Ltd | Arts & recreation | 2019 |
| Alchemy Systems Limited | Professional & scientific | 2021 |
| Alcs Consultancy Ltd | Professional & scientific | 2022 |
| Aldergate Business Services Ltd | Administrative & support | 2021 |
| Alders Paper Converters Limited | Manufacturing | 2013 |
| Alex & TIA Ltd | Manufacturing | 2016 |
| Alex Van&Edy Roof Ltd | Transport & logistics | 2022 |
| Alex's Hot TUB Breaks Ltd | Hospitality | 2022 |
| Alexander Homes (UK) Limited | Construction | 2003 |
| Alexander Michael Limited | Wholesale & retail | 2006 |
| Alfa Entertainment Ltd | Administrative & support | 2025 |
| Alfgyros Ltd | Transport & logistics | 2021 |
| Alhenjon Investments Limited | Households | 1996 |
| ALI Transport Solutions Ltd | Transport & logistics | 2014 |
| Alicia Wadeley Ltd | Wholesale & retail | 2019 |
| Alimat Util Limited | Wholesale & retail | 2020 |
| Alin GT Ltd | Transport & logistics | 2017 |
| Alin Haulage Ltd | Transport & logistics | 2015 |
| Alin Transport&Courier Limited | Transport & logistics | 2025 |
| Alinex Limited | Professional & scientific | 2025 |
| Alison and Ollie's Resuscitation Training Academy Limited | Education | 2025 |
| Alistair Riley Architects Ltd | Professional & scientific | 2021 |
| Alistair Wykes Contracting Limited | Construction | 2019 |
| Aliton Care & Cleaning Ltd | Administrative & support | 2024 |
| ALL Shot From Above Ltd | Professional & scientific | 2026 |
| ALL Van Solutions Ltd | Wholesale & retail | 2025 |
| Alldrives & Controls Ltd | Wholesale & retail | 2009 |
| Allens of Kingsbury (Swimming) Limited | Wholesale & retail | 2004 |
| Alliance Events Limited | Administrative & support | 2017 |
| Alliance Management Group Limited | Administrative & support | 2023 |
| Alliance Security Management Limited | Administrative & support | 2022 |
| Alma Textiles Limited | Manufacturing | 1991 |
| Alpha & Omega Management Consultants Ltd | Professional & scientific | 2012 |
| Alpha Care Group Ltd | Health & social care | 2025 |
| Alpine Hvac Ltd | Construction | 2019 |
| Also Electrical & Property Services Limited | Construction | 2017 |
| ALT Marketing Ltd | Professional & scientific | 2024 |
| Altair Group Developments Ltd | Construction | 2025 |
| Altair Group Holdings Ltd | Financial services | 2025 |
| Altair Group Limited | Construction | 2024 |
| Altair Property Group Ltd | Real estate | 2026 |
| Alto Barren Plumbing & Heating Limited | Construction | 2018 |
| Alukas Ltd | Real estate | 2026 |
| Aluminium Fabrication Services Limited | Manufacturing | 2021 |
| Alvecote Wood Limited | Agriculture & fishing | 2003 |
| Alyn Trans Ltd | Transport & logistics | 2022 |