| Alif Trading Limited | Wholesale & retail | 2024 |
| Align Workforce Limited | Administrative & support | 2025 |
| Alina Freight Forward Limited | Transport & logistics | 2025 |
| Alins Transport Limited | Transport & logistics | 2025 |
| ALL About Drains (Midlands) Ltd | Water & waste | 2019 |
| ALL Alloy Slitting Services Holdings Limited | Administrative & support | 2021 |
| ALL Alloy Slitting Services Limited | Manufacturing | 1999 |
| ALL Plastics Midlands Ltd | Wholesale & retail | 2017 |
| Allebeauty Ltd | Other services | 2025 |
| Allison J Limited | Wholesale & retail | 2026 |
| Allure Housing and Care Ltd | Health & social care | 2025 |
| ALM Distribution Limited | Wholesale & retail | 2009 |
| Almaz Aviation Ltd | Transport & logistics | 2020 |
| Alpha Construction Global Ltd | Construction | 2025 |
| Alpha Transport Services Limited | Transport & logistics | 2003 |
| Alphalete EU Limited | Wholesale & retail | 2017 |
| Alps Living Ltd | Real estate | 2025 |
| Alston Property Investments Limited | Real estate | 2018 |
| Altech Global Trade Limited | Manufacturing | 2012 |
| Alterway Construction Ltd | Construction | 2026 |
| Altrad Beaver 84 Limited | Professional & scientific | 1984 |
| Altuvia Property Consulting Ltd | Professional & scientific | 2025 |
| Alum & Jabbar Meat Ltd | Wholesale & retail | 2026 |
| Alutrade Limited | Water & waste | 1984 |
| Alutrade Management Limited | Financial services | 2024 |
| Alutrade Management Team Investments Limited | Financial services | 2016 |
| Alvora Supplements Ltd | Manufacturing | 2025 |
| AM Fish Bar Limited | Hospitality | 2025 |
| Aman Enterprises Limited | Wholesale & retail | 2016 |
| Amara Transport Ltd | Transport & logistics | 2024 |
| AMARA2021 Ltd | Hospitality | 2023 |
| Amario & Romaeo Legacy Estates Ltd | Real estate | 2025 |
| Amarkhel Ltd | Transport & logistics | 2023 |
| Amarnia Ltd | Transport & logistics | 2026 |
| Amayra Midlands Ltd | Transport & logistics | 2024 |
| Amazon Deliver Limited | Transport & logistics | 2025 |
| AMB Worldwide Ltd | Construction | 2026 |
| Amesbury Inflatables Ltd | Transport & logistics | 2023 |
| AMF Logistical Solutions Limited | Professional & scientific | 2020 |
| Amidan Limited | Transport & logistics | 2021 |
| Amiluxe Ltd | Real estate | 2024 |
| Amity Medical Care Services Ltd | Health & social care | 2025 |
| AMJ Kebab House Ltd | Hospitality | 2025 |
| AMK Planning & Design Holdings Limited | Financial services | 2022 |
| AMK Planning & Design Limited | Professional & scientific | 2021 |
| Amks Logistics Ltd | Transport & logistics | 2021 |
| Amore Pizza (Bristol) Ltd | Hospitality | 2019 |
| Amped Electrical & Home Services Limited | Construction | 2025 |
| AMR Prestige Motors Limited | Wholesale & retail | 2026 |
| Amrit Holdings UK Ltd | Real estate | 2022 |
| Amritsar Sweets & Catering Oldbury Ltd | Wholesale & retail | 2025 |
| Amsb Property Ltd | Real estate | 2024 |
| Amzi Builders Limited | Construction | 2025 |
| Anbar Recruitment Ltd | Administrative & support | 2024 |
| Anchored Pathway Ltd | Hospitality | 2024 |
| Anda Apna Apna Ltd | Hospitality | 2024 |
| Anderson Davis Properties Ltd | Real estate | 2022 |
| Andrzej Transport Ltd | Transport & logistics | 2015 |
| Andys' Ales Limited | Manufacturing | 2017 |
| Aneesha Eyecare Ltd | Health & social care | 2025 |
| Anew Aesthetics Limited | Other services | 2010 |
| Angella Catering Ltd | Hospitality | 2016 |
| Angelo M Limited | Wholesale & retail | 2012 |
| Angels of Base Promotions Ltd | Professional & scientific | 2025 |
| Angels View Ltd | Health & social care | 2019 |
| Anina Ltd | Transport & logistics | 2024 |
| Anita Jane Winwood Ltd | Extraterritorial | 2022 |
| Ankor Group Ltd | Wholesale & retail | 2024 |
| Anmol Transport Ltd | Transport & logistics | 2023 |
| Anna Company Registration Ltd | Professional & scientific | 2025 |
| Annabelle's Day Nursery Limited | Education | 2011 |
| Anranauto Ltd | Wholesale & retail | 2024 |
| Ansonsco 10 Limited | Financial services | 2019 |
| Antmary 1 Ltd | Professional & scientific | 2026 |
| Antonio's Car Wash and DRY Ltd | Administrative & support | 2025 |
| Antonio's Hand Car Wash Ltd | Administrative & support | 2024 |
| AP Bifold Doors Ltd | Wholesale & retail | 2015 |
| AP Deliveries Limited | Transport & logistics | 2016 |
| AP Glazing (Oldbury) Ltd. | Manufacturing | 2011 |
| AP Plastics (Oldbury) Limited | Wholesale & retail | 2013 |
| AP Properties & Holdings Ltd | Real estate | 2024 |
| AP88 Ltd | Wholesale & retail | 2025 |
| Apex Growth Global Ltd | Information & communication | 2026 |
| Apex Routes Ltd | Transport & logistics | 2026 |
| Apex Workwear Ltd | Wholesale & retail | 2023 |
| Aplha Freight Solutions Ltd | Transport & logistics | 2025 |
| Appearances Hair & Beauty Ltd | Other services | 2024 |
| Appliance Repair Centre Ltd | Manufacturing | 2022 |
| Applied Coating Technologies (Properties ) Limited | Real estate | 2017 |
| Applied Coating Technologies Limited | Manufacturing | 2000 |
| Apps Holdings Ltd | Financial services | 2020 |
| Apstorage Ltd | Administrative & support | 2025 |
| Aquacare Medical Limited | Wholesale & retail | 2021 |
| Aquarome Fish and Chips Ltd | Hospitality | 2025 |
| Aquilonis Consulting Ltd | Information & communication | 2012 |
| AR Construction Birmingham 24/7 Limited | Construction | 2025 |
| AR Construction Birmingham Limited | Construction | 2020 |
| AR Developments & Renovations Ltd | Construction | 2025 |
| AR Quality Limited | Wholesale & retail | 2023 |
| ARA Pharma Limited | Professional & scientific | 2020 |