| Akahar Empire Ltd | Hospitality | 2024 |
| Akfra Global (UK) Limited | Wholesale & retail | 2013 |
| Akfrieght Ltd | Transport & logistics | 2026 |
| AKJ Kitchen and Bedroom Ltd | Manufacturing | 2024 |
| Akorys Ltd | Wholesale & retail | 2025 |
| Akshay Supermarket Ltd | Wholesale & retail | 2019 |
| AL NUR Collections Limited | Wholesale & retail | 2025 |
| Al&B Interiors Construction Ltd | Transport & logistics | 2021 |
| Al-Rabb Ltd | Hospitality | 2022 |
| Aladdins Ride Ltd | Transport & logistics | 2025 |
| Alan's Motor Mechanic Ltd | Other services | 2025 |
| Albion Tividale Ltd | Hospitality | 2014 |
| Aldo Auto Service Ltd | Wholesale & retail | 2019 |
| Aldridge Electrical Limited | Construction | 2011 |
| Alecsco Ltd | Transport & logistics | 2018 |
| Alex & Alexandra Sellers Ltd | Wholesale & retail | 2024 |
| Algum Services Limited | Other services | 2020 |
| Alicebee Ventures Ltd | Hospitality | 2022 |
| ALL Stars Promotions Ltd | Other services | 2024 |
| Alloyed Supply Limited | Other services | 2017 |
| Alok Restaurant Ltd | Other services | 2018 |
| Alossi's Limited | Wholesale & retail | 2020 |
| Alpha Beat Shopfronts Shutters Ltd. | Construction | 2019 |
| Alpha Glass Ltd | Manufacturing | 2025 |
| Alpha Window & Door Limited | Construction | 2008 |
| Alpha-Rowen Holdings Limited | Real estate | 2006 |
| Alpha-Rowen Limited | Manufacturing | 2009 |
| Aluminium & PVC Specialist Ltd | Manufacturing | 2023 |
| Alvin Tyres Ltd | Wholesale & retail | 2024 |
| Always There Home Services Limited | Administrative & support | 2026 |
| Am's Home Improvements Ltd | Wholesale & retail | 2025 |
| Amanahbeauty Ltd | Wholesale & retail | 2026 |
| Amarah Blinds & Glass Limited | Manufacturing | 2016 |
| Amatech IT Services Ltd | Information & communication | 2020 |
| Ambulance & Medical Solutions Ltd | Wholesale & retail | 2026 |
| Amessential Photography Limited | Professional & scientific | 2025 |
| Amgmm Ltd | Transport & logistics | 2021 |
| Amma Trans Ltd | Transport & logistics | 2016 |
| AMP Scaffolding Limited | Construction | 2011 |
| Amrit Construction Ltd | Administrative & support | 2016 |
| Analytic Imaging Limited | Health & social care | 2018 |
| Anas AJ Ltd | Transport & logistics | 2025 |
| Andre Oils Ltd | Manufacturing | 2025 |
| Angad G Transport Ltd | Transport & logistics | 2026 |
| Angel Connextions Ltd | Wholesale & retail | 2025 |
| Angela's Auto Ltd | Wholesale & retail | 2025 |
| Angela’S Workforce Ltd | Construction | 2018 |
| Angell Reactive Maintenance & Installation Services Ltd | Manufacturing | 2024 |
| Angelogics Ltd. | Transport & logistics | 2015 |
| Angle Ring Company Limited(The) | Manufacturing | 1957 |
| Angle Ring Holdings Limited | Financial services | 1973 |
| Animal Welfare Investigation Team C.I.C. | Other services | 2025 |
| Ankgyat Logistics Limited | Transport & logistics | 2025 |
| Annant Logistics Limited | Transport & logistics | 2024 |
| Anywhere Logistics Limited | Transport & logistics | 2014 |
| Apaxx Solution Limited | Wholesale & retail | 2025 |
| Apecs Consult Ltd | Manufacturing | 2006 |
| Apex Fitness and Combat Ltd | Wholesale & retail | 2026 |
| Apex Hydro Solutions Ltd | Construction | 2024 |
| Apex Rackings Limited | Other services | 2025 |
| Apex Xpress Logic Ltd | Transport & logistics | 2025 |
| APG Installations Ltd | Construction | 2021 |
| Aphrodite Jewellery Ltd | Wholesale & retail | 2022 |
| Appliance Crush UK Ltd | Wholesale & retail | 2025 |
| Aqua-Ting Limited | Agriculture & fishing | 2025 |
| Aquatic Factory Ltd | Wholesale & retail | 2022 |
| Ara.Ia Logistics Ltd | Transport & logistics | 2024 |
| Arabella Moon Ltd | Extraterritorial | 2022 |
| Aram Dream Homes Ltd | Real estate | 2025 |
| ARC Metal Bending Group Limited | Financial services | 2020 |
| Ardencoast Limited | Professional & scientific | 2013 |
| Ardnoel Ltd | Health & social care | 2024 |
| Aregon Care Ltd | Health & social care | 2018 |
| Armat Ltd | Transport & logistics | 2014 |
| Arsel Limited | Wholesale & retail | 2025 |
| Art & ME CIC | Arts & recreation | 2021 |
| Arthur Logistic Ltd | Transport & logistics | 2026 |
| Aruut Ltd | Wholesale & retail | 2021 |
| AS Driver Ltd | Wholesale & retail | 2015 |
| Asaparts. Ltd | Wholesale & retail | 2025 |
| Ascend Education Provision Ltd | Real estate | 2023 |
| Ascot Racing Ltd | Wholesale & retail | 2024 |
| Asees Courier Ltd | Transport & logistics | 2024 |
| Asees New Brick Ltd | Construction | 2022 |
| Asian Canapes Ltd | Hospitality | 2021 |
| ASK VIK Ltd | Wholesale & retail | 2023 |
| Aspect Powder Coatings Limited | Manufacturing | 1993 |
| Aspiring Steps Ltd | Health & social care | 2024 |
| Assured Planning Services Limited | Real estate | 2012 |
| Aston Chemist Limited | Wholesale & retail | 1996 |
| Aston Court Residential Management Company Limited | Households | 2021 |
| Aston Street Motors Ltd | Wholesale & retail | 2021 |
| AT Autoparts Limited | Transport & logistics | 2023 |
| Atlas Sports International Limited | Information & communication | 2025 |
| Audi Parts West Midlands Limited | Wholesale & retail | 2014 |
| Auracontext Ltd | Information & communication | 2026 |
| Aurora Housing Ltd | Real estate | 2026 |
| Auto Ace Limited | Wholesale & retail | 2024 |
| Auto Solutions (MOT) Tipton Ltd | Wholesale & retail | 2026 |
| Autowire Electrical Ltd | Wholesale & retail | 2026 |