| Angels Walsall Management Ltd | Real estate | 2025 |
| Angelz Healthcare Ltd | Health & social care | 2022 |
| Anglo European Group Ltd | Financial services | 2015 |
| Anglo European Holdings Limited | Financial services | 2005 |
| Anglo Metal Forming Limited | Manufacturing | 1990 |
| Anglo Steel Corp. Limited | Financial services | 2015 |
| Annapurana Ltd | Hospitality | 2024 |
| Anthony C. Rickards Limited | Wholesale & retail | 1977 |
| Anza Property Ltd | Real estate | 2019 |
| AP Leads Limited | Information & communication | 2025 |
| AP Rail Ltd | Construction | 2015 |
| Apch Services Ltd | Other services | 2021 |
| Apex Auto Repair Limited | Wholesale & retail | 2024 |
| Apex Inox Limited | Professional & scientific | 2003 |
| Apex Marinetech Limited | Professional & scientific | 2003 |
| Apex Stainless Fasteners Limited | Construction | 1991 |
| Apex Stainless Holdings Limited | Financial services | 2013 |
| APF Leisure C.I.C. | Other services | 2009 |
| APL Ltd | Administrative & support | 2022 |
| Apollo Foam Limited | Manufacturing | 2018 |
| Apple & Apple Ltd | Wholesale & retail | 2019 |
| AR Transport Midlands Ltd | Transport & logistics | 2022 |
| Architectural Panels Limited | Manufacturing | 1987 |
| Arematherapy C.I.C. | Public administration | 2023 |
| Arise Fostering Ltd | Health & social care | 2025 |
| Arjd Real Estate Ltd | Real estate | 2026 |
| Armstrong UK Home Improvements Ltd | Construction | 2025 |
| ARS Retail Ltd | Wholesale & retail | 2024 |
| Arsher Ltd | Health & social care | 2023 |
| Arthouse Hair Salon Limited | Other services | 2024 |
| Artificial Intelligence Security System Ltd | Information & communication | 2024 |
| Artisan Vapor Company UK Ltd | Wholesale & retail | 2017 |
| AS Dhillon UK Limited | Transport & logistics | 2017 |
| Ascon Trading Limited | Wholesale & retail | 2013 |
| ASD International Ltd | Professional & scientific | 2026 |
| ASD Investments Ltd | Hospitality | 2023 |
| ASD Transport Birmingham Limited | Transport & logistics | 2017 |
| Ashbourne Taxis Limited | Transport & logistics | 2013 |
| Ashbrookes Estates Ltd | Real estate | 2026 |
| Ashmi Retail Ltd | Wholesale & retail | 2026 |
| Asola Ltd | Administrative & support | 2016 |
| Aston Baker Construction Ltd | Construction | 2020 |
| Astonishing Ltd | Hospitality | 2025 |
| Asylum Customs UK Limited | Wholesale & retail | 2025 |
| Athwal & Sons Ltd | Administrative & support | 2026 |
| Attic 55 Ltd | Professional & scientific | 2019 |
| Atwal Group Limited | Financial services | 2016 |
| Auction My Waste Limited | Information & communication | 2016 |
| Audex Ltd | Real estate | 2025 |
| Aulakh 13 Construction Limited | Construction | 2026 |
| AUM Buildings Limited | Households | 2025 |
| AUM Construction Ltd | Construction | 2009 |
| Aureon Solutions Limited | Professional & scientific | 2025 |
| Aurora Topco 1 Limited | Administrative & support | 2021 |
| Aurora Vision Rail Services Ltd | Manufacturing | 2026 |
| Auto Sales Hub Limited | Wholesale & retail | 2021 |
| Autoembrace Ltd | Wholesale & retail | 2024 |
| Automotive & Body Repairs Limited | Manufacturing | 2015 |
| Automotive Camera Specialists Ltd | Wholesale & retail | 2021 |
| Automotive Vehicle Care Ltd | Wholesale & retail | 2025 |
| Automotivegeneration Ltd | Manufacturing | 2021 |
| Autopartzbmw Limited | Wholesale & retail | 2025 |
| Autopop Service Ltd | Wholesale & retail | 2016 |
| Autotechnik Limited | Wholesale & retail | 2003 |
| AVAW1 Ltd | Hospitality | 2025 |
| Avec Support Ltd | Health & social care | 2019 |
| Awarding Care Ltd | Health & social care | 2015 |
| Awsland Limited | Real estate | 2013 |
| Azaria Housing Ltd | Real estate | 2024 |
| Aziz International Limited | Transport & logistics | 2025 |
| Azureon Ltd | Information & communication | 2025 |
| B & D Hand Car Wash Ltd | Wholesale & retail | 2025 |
| B & L Transport Limited | Transport & logistics | 2026 |
| B Christie Tooling Design Ltd | Professional & scientific | 2016 |
| B Coffee Ltd | Hospitality | 2025 |
| B D Harvey Ltd | Wholesale & retail | 2026 |
| B Harris Electrical Ltd | Construction | 2026 |
| B L Best Ltd | Wholesale & retail | 2023 |
| B Newell Holdings Ltd | Real estate | 2024 |
| B.G.S. Sports & Leisure Ltd | Hospitality | 2019 |
| B.H. Transmission Services Limited | Manufacturing | 1992 |
| B.P. Lasers Ltd | Administrative & support | 2024 |
| B.R. Flooring WM Ltd | Construction | 2026 |
| B.S. Promotions Ltd | Professional & scientific | 2018 |
| B.T.C. Activewear Limited | Wholesale & retail | 2000 |
| B.W. Roofing Ltd | Construction | 2023 |
| B.W.J. Ltd | Financial services | 2021 |
| BA18 Construction Ltd | Construction | 2024 |
| BA18 Intrenational Refrigeration Ltd | Other services | 2025 |
| Babster Products Ltd | Wholesale & retail | 2025 |
| Baddeez Ltd | Other services | 2025 |
| Badwal Investments Ltd | Real estate | 2015 |
| Bahia Management Ltd | Arts & recreation | 2021 |
| Bains Financial Ltd | Professional & scientific | 2025 |
| Balaj Motors Ltd | Wholesale & retail | 2014 |
| BAM Construction Services [WM] Ltd | Construction | 2021 |
| Bangial Halal Meat Ltd | Wholesale & retail | 2024 |
| Bangial Property Ltd | Real estate | 2024 |
| Banglalink VEG Ltd | Wholesale & retail | 2015 |
| Bargain Town Ltd | Wholesale & retail | 2019 |