| 1337 Testing Limited | Information & communication | 2011 |
| 2 Hills Consultancy Limited | Professional & scientific | 2021 |
| 24/7 Tech Repair Ltd | Wholesale & retail | 2026 |
| 24XPRESS Ltd | Transport & logistics | 2020 |
| 2XPLORE Ltd | Wholesale & retail | 2017 |
| 365COMFORTS Ltd | Wholesale & retail | 2022 |
| 365MEDICALSERVICESUK Ltd | Health & social care | 2014 |
| 505 Commercial Services Ltd | Professional & scientific | 2026 |
| 7EVERN Automotive Ltd | Wholesale & retail | 2025 |
| 7SOAPS Ltd | Manufacturing | 2023 |
| 7SOL Ltd | Administrative & support | 2016 |
| A & D Taylor Contractors Limited | Construction | 2016 |
| A & L Leisure Homes Limited | Hospitality | 2024 |
| A & M Kitchen and Joinery Installations Ltd | Construction | 2006 |
| A & P Auto Services (Kidderminster) Ltd | Wholesale & retail | 2009 |
| A M M Professional Limited | Health & social care | 2013 |
| A. M. Ormerod Heating & Plumbing Limited | Construction | 2020 |
| A1 Prestige Shipping Services Limited | Transport & logistics | 1991 |
| AA Groundworks and Construction Limited | Construction | 2023 |
| AB Luxury Hair Ltd | Other services | 2022 |
| Abbie Worton Design Ltd | Wholesale & retail | 2022 |
| Abis Solutions Limited | Manufacturing | 2011 |
| Able Billionaire Creation Blue Print.Com Ltd | Education | 2025 |
| Above Board Pet Travel Ltd | Administrative & support | 2026 |
| Abstracts Hair Studio Limited | Other services | 2012 |
| ABT Legal Ltd | Professional & scientific | 2024 |
| Accelulator Ltd | Information & communication | 2024 |
| Accent Finance Limited | Real estate | 1969 |
| Account Development & Management Services Limited | Professional & scientific | 2025 |
| Acero Projects Ltd | Construction | 2011 |
| ACG Solutions Ltd | Administrative & support | 2022 |
| Active Youth Outreach Services C.I.C. | Education | 2015 |
| Acton Court Management Company Limited | Real estate | 1991 |
| Adalta Energy Limited | Other services | 2021 |
| Adenpath Limited | Households | 1992 |
| Adhere Business Solutions Ltd | Wholesale & retail | 2024 |
| ADS Accountancy Services Ltd | Professional & scientific | 2003 |
| Advanced Rehabilitation Training Ltd | Education | 2025 |
| Advantage Health & Social Care Ltd | Administrative & support | 2017 |
| Adventures by Elle Ltd | Extraterritorial | 2022 |
| Aeak Consulting Limited | Professional & scientific | 2026 |
| Afrb Property's Ltd | Real estate | 2025 |
| Agile Property Repairs Ltd | Construction | 2022 |
| Agrade Construction Group Ltd | Construction | 2025 |
| Agrade Windows and Doors Ltd | Construction | 2021 |
| AGS Recovery Ltd | Administrative & support | 2010 |
| AHA Automation Ltd | Professional & scientific | 2026 |
| Air Compliance Ltd | Energy | 2024 |
| Aircraft Commerce Consulting Limited | Professional & scientific | 2017 |
| AJ & SJ Healthcare Limited | Administrative & support | 2018 |
| AJ Holford Building & Roofing Contractors Ltd | Construction | 2016 |
| Ajen Trading Ltd | Wholesale & retail | 2020 |
| Ajh-Co Limited | Real estate | 2016 |
| AJJ Estates Limited | Real estate | 2021 |
| AJM Transport (Kidderminster) Ltd | Transport & logistics | 2018 |
| Ajsp Woodland Management LLP | | 2023 |
| AJT Electrical Services Limited | Construction | 2006 |
| Akasar Services Limited | Professional & scientific | 2017 |
| ALD Electrics Ltd | Construction | 2008 |
| Alex Auto Motors Limited | Manufacturing | 2025 |
| Aligné Reformer Studio Ltd | Arts & recreation | 2025 |
| Alison Braithwaite Limited | Extraterritorial | 2017 |
| ALL Star Home Improvements Limited | Construction | 2025 |
| ALL Your Care Limited | Information & communication | 2010 |
| Allstar Portfolio Ltd | Real estate | 2020 |
| Alpha 2 Investment Ltd | Real estate | 2014 |
| Alpha Security & K9 Services Limited | Administrative & support | 2025 |
| Alpine International Holdings Limited | Transport & logistics | 2009 |
| Alsar 2014 Ltd | Construction | 2014 |
| Altima Web Consultancy Limited | Information & communication | 2011 |
| Amalfii Heating (South Midlands) Limited | Other services | 2018 |
| Amber Developments Limited | Real estate | 1982 |
| Amber Reach Limited | Real estate | 1989 |
| Ambrose Organics Limited | Wholesale & retail | 2020 |
| American Nails HN Ltd | Other services | 2024 |
| Anchor Meadows Property Ltd | Construction | 2025 |
| Andastra Limited | Health & social care | 2016 |
| Anglo House Ltd | Real estate | 2016 |
| Ani's House Ltd | Hospitality | 2023 |
| Anthony Williams Pathology Limited | Health & social care | 2024 |
| ANY Hard Design Ltd | Professional & scientific | 2020 |
| Anyway Audio Ltd | Information & communication | 2018 |
| AP6 Contractors Ltd | Construction | 2024 |
| Apex Health and Safety Ltd | Professional & scientific | 2026 |
| Apex Loft Design Ltd | Construction | 2025 |
| Apex Roofings & Buildings Ltd | Construction | 2025 |
| ARC Alarms LLP | | 2012 |
| Arcade Geeks INT Ltd | Manufacturing | 2021 |
| Areyoureadytococo Ltd | Other services | 2022 |
| Argento & Birch Limited | Manufacturing | 2026 |
| Arrow Electrical Ltd | Construction | 2023 |
| Art Print Drives & Patios Ltd | Construction | 2018 |
| Artisan Cheesemakers Ltd | Manufacturing | 2024 |
| ASE Build Limited | Construction | 2018 |
| ASE Install Ltd | Construction | 2014 |
| Ashdown Driving Academy Ltd | Education | 2022 |
| Ashiagon Ltd | Wholesale & retail | 2019 |
| ASK Electrical Services Ltd | Construction | 2022 |
| ASM Design Limited | Professional & scientific | 2021 |
| Astley Cross Honey Company Ltd | Wholesale & retail | 2023 |