| Aecus Aviation Ltd | Transport & logistics | 2023 |
| Aecus Leisure Ltd | Other services | 2021 |
| Aecus Recruitment Ltd | Professional & scientific | 2019 |
| Aero CS Limited | Professional & scientific | 2016 |
| Aerojets Travel Ltd. | Administrative & support | 1991 |
| Aerospace Manufacturing Strategy and Support Ltd | Professional & scientific | 2012 |
| Aeterna Trading Ltd | Wholesale & retail | 2025 |
| Aevum Capital Limited | Administrative & support | 2025 |
| Afaq International Trading Co., Ltd | Wholesale & retail | 2025 |
| Affinity Marketing Direct Limited | Administrative & support | 2007 |
| Affordable Appliance Store Ltd | Wholesale & retail | 2022 |
| Affordable Housing Treasury Limited | Financial services | 2019 |
| AG Business Solutions Ltd | Professional & scientific | 2021 |
| AG Fast Limited | Financial services | 2004 |
| AGE UK Stafford & District | Health & social care | 1997 |
| Agentic Sciences Ltd | Professional & scientific | 2026 |
| Agiyo Ltd | Wholesale & retail | 2018 |
| Aglencrose Ltd | Wholesale & retail | 2025 |
| AGP Installations Limited | Construction | 2022 |
| AGT Alloys Ltd | Wholesale & retail | 2025 |
| AGW Trading Limited | Wholesale & retail | 2021 |
| AH Window Cleaning Limited | Administrative & support | 2018 |
| Ahad Civil Engineering Consultancy Ltd | Construction | 2015 |
| AHS Engineering Limited | Professional & scientific | 2015 |
| AHT Insights Ltd | Education | 2026 |
| AI Decho Service Limited | Wholesale & retail | 2023 |
| AI Genius Solutions Ltd. | Education | 2025 |
| Aikeiang Ltd | Wholesale & retail | 2025 |
| Air Conditioning Service & Installations Limited | Construction | 2014 |
| Airport Express (West Midlands) Limited | Transport & logistics | 2003 |
| AJ Blocks & Beams Limited | Construction | 2025 |
| AJ Real Property Ltd | Real estate | 2023 |
| AJ Sparkes Services Ltd | Construction | 2022 |
| AJB Property Maintenance and Cleaning Solutions Ltd | Other services | 2025 |
| AJD Computer Services Limited | Other services | 2019 |
| AJL Carpentry Ltd | Construction | 2016 |
| AJR HV & LV Commissioning Services Ltd | Construction | 2016 |
| AJR Taverns Ltd | Hospitality | 2026 |
| AJT- Rentals Ltd | Hospitality | 2021 |
| AJW Building Services (Stafford) Limited | Construction | 2020 |
| AJW Property (Stafford) Investment Limited | Real estate | 2026 |
| AJW Property One Limited | Real estate | 2026 |
| AK Plumbing & Central Heating Limited | Manufacturing | 2010 |
| AK Wheels and Body Ltd | Wholesale & retail | 2025 |
| Akps Transport Ltd | Transport & logistics | 2025 |
| Akroates Health Care Limited | Administrative & support | 2022 |
| Aksck Ltd | Professional & scientific | 2022 |
| Aktria Limited | Hospitality | 2018 |
| Akyrewbrad Ltd | Wholesale & retail | 2025 |
| Al-Maqtri and Mashrah Import and Export Co., Ltd | Wholesale & retail | 2024 |
| Al-Rateb Co., Ltd | Extraterritorial | 2019 |
| Alan B. Petchell & Associates Limited | Manufacturing | 2003 |
| Alan Farrow Electrical Ltd | Manufacturing | 2026 |
| Alan Miles Building and Landscaping Ltd | Construction | 2020 |
| Alan Perry Limited | Construction | 2003 |
| Alaskan Ice Desserts Ltd | Hospitality | 2025 |
| Alaskan Ice Parkside Ltd | Hospitality | 2026 |
| Alberts Cafe Stafford Limited | Hospitality | 2022 |
| Albion Global Traders Ltd | Wholesale & retail | 2025 |
| Alcochrom Ltd | Wholesale & retail | 2021 |
| Aldridge Garages Limited | Financial services | 2016 |
| Alex Hall Farrier Services Limited | Other services | 2012 |
| Alex Jones Electrical Ltd | Construction | 2025 |
| Alex Sparrow Limited | Professional & scientific | 2013 |
| Alexander Court (Stoke on Trent) Management Company Limited | Households | 2005 |
| Alexander Mason Ltd | Construction | 2008 |
| Alexandra Salon Ltd | Hospitality | 2021 |
| Alexmar Limited | Transport & logistics | 2025 |
| Algomli Trading Co., Limited | Wholesale & retail | 2023 |
| ALI K Barbers Ltd | Other services | 2020 |
| Aliden Drylining Ltd | Construction | 2025 |
| Aliexoilg Limited | Wholesale & retail | 2025 |
| Alikat Fabrications Ltd | Manufacturing | 2021 |
| Alined Limited | Professional & scientific | 2009 |
| ALK Renovations Limited | Construction | 2010 |
| Alku Ltd | Extraterritorial | 2019 |
| ALL 3 Circles Limited | Administrative & support | 2019 |
| ALL Counties Financial Limited | Financial services | 2005 |
| ALL Counties Property Development Limited | Real estate | 2003 |
| ALL Court Tennis Limited | Arts & recreation | 2018 |
| ALL Materials With US Ltd | Wholesale & retail | 2024 |
| ALL Power Electrical Ltd | Energy | 2020 |
| ALL Products DH Limited | Wholesale & retail | 2026 |
| ALL Terrain Plant & Access Ltd | Administrative & support | 2026 |
| ALL Wrapped UP for YOU Ltd | Other services | 2015 |
| Allburg Limited | Information & communication | 2012 |
| Allen Rose Associates Limited | Professional & scientific | 2012 |
| Allen's Hospitality Services Ltd | Hospitality | 2021 |
| Allett Limited | Manufacturing | 1991 |
| Allied Spaces Limited | Other services | 2021 |
| Alloy Wheel Medic Limited | Wholesale & retail | 2022 |
| Allseasons Int'L Co., Ltd. | Wholesale & retail | 2014 |
| Allstar Electronics Trading Limited | Wholesale & retail | 2019 |
| Allstarmedia Ltd | Wholesale & retail | 2025 |
| All’S Nick Ltd | Wholesale & retail | 2025 |
| Almogren Import& Export Co., Ltd | Wholesale & retail | 2023 |
| Alomari International Trading Co., Ltd | Wholesale & retail | 2023 |
| Alpenbest Limited | Health & social care | 2008 |
| Alpha International Training Ltd | Education | 2023 |
| Alpha Male Logistics Ltd | Transport & logistics | 2025 |