| AJ Removals and Storage Ltd | Other services | 2005 |
| AJB Building Products Ltd | Wholesale & retail | 2020 |
| AJB Joinery Limited | Manufacturing | 2015 |
| AJC (Midlands) Limited | Construction | 2007 |
| AJD Estates Ltd | Construction | 2021 |
| AJR IT Consultancy Limited | Information & communication | 2026 |
| AJS Civils Ltd | Construction | 2025 |
| Ajsn Holdings Ltd | Professional & scientific | 2024 |
| AK Tech & Gadget Limited | Wholesale & retail | 2023 |
| AK Windows & Installations Limited | Construction | 2008 |
| Akram Investments Limited | Construction | 2022 |
| AKS Interim Ltd | Professional & scientific | 2017 |
| AL Mumin Death Committee Ltd | Other services | 2023 |
| AL Pacawaca Glamping Limited | Hospitality | 2024 |
| Alan Mcclelland Limited | Manufacturing | 1999 |
| Alandice Properties Limited | Households | 2017 |
| Alarum Productions Ltd | Education | 2019 |
| Alastair Brookes Surgeon Ltd | Health & social care | 2023 |
| Albany Finance Co.Limited(The) | Real estate | 1954 |
| Albert MAY Estates Ltd | Real estate | 2016 |
| Albion Leasing (West Midlands) Limited | Administrative & support | 2001 |
| Alchemy Architectural Aluminium Systems Limited | Manufacturing | 2005 |
| Alchemy Electrical Contractors Limited | Construction | 2018 |
| Alcohol Cafe Ltd | Wholesale & retail | 2024 |
| ALD Group Ltd | Education | 2016 |
| Alex King Consulting Limited | Professional & scientific | 2016 |
| Alex Sharp Limited | Wholesale & retail | 2024 |
| Alexander James Hair and Beauty Ltd | Other services | 2017 |
| Alexander Trading Company Limited | Wholesale & retail | 1981 |
| Alexiam Solutions Limited | Real estate | 2020 |
| Alfabet Corporatewear Limited | Wholesale & retail | 2021 |
| Alfateh Ltd | Wholesale & retail | 2025 |
| Alfatih Ltd | Wholesale & retail | 2025 |
| ALG Autos Limited | Wholesale & retail | 2019 |
| Alhanash Ltd | Other services | 2025 |
| Alhassan Abdulnoor Ltd | Construction | 2024 |
| Alicon Property Limited | Real estate | 2013 |
| ALL About ME Spa Ltd | Health & social care | 2026 |
| Allenbrook Home (Halesowen) Ltd. | Health & social care | 2018 |
| Allfor Group Limited | Financial services | 2026 |
| Allfor Residential Ltd | Real estate | 2018 |
| Allforprojects Limited | Information & communication | 2026 |
| Allforproperty Limited | Construction | 2019 |
| Allseasons Building Ltd | Construction | 2022 |
| Allstar Development Contracts Limited | Professional & scientific | 1978 |
| Almond Edge Limited | Construction | 2026 |
| Almujbel Ltd | Wholesale & retail | 2025 |
| Alom Enterprise Ltd | Wholesale & retail | 2025 |
| Alpha Commercial Holdings Limited | Financial services | 2021 |
| Alpha Drive (West Midlands) Limited | Administrative & support | 2008 |
| Alpha GAS & Electrical Ltd | Construction | 2023 |
| Alpha Luxury Lifestyle Limited | Other services | 2021 |
| Alpha One Management Ltd | Real estate | 2021 |
| Alpharel Limited | Information & communication | 2004 |
| Alstain Metal Services Limited | Wholesale & retail | 1990 |
| Altitude (Ascot) Limited | Real estate | 2013 |
| Altitude Property Developments Limited | Real estate | 2012 |
| Altitude Training Solutions Ltd | Other services | 2017 |
| Alto Accounting Solutions Ltd | Professional & scientific | 2025 |
| AM Kitchen Fitters Ltd | Construction | 2025 |
| Amaans Properties Ltd | Real estate | 2025 |
| AMAC4C Ltd | Water & waste | 2024 |
| Amada Barber Ltd | Information & communication | 2026 |
| Amadas Enterprises Ltd | Construction | 2026 |
| Amah Ghalib Limited | Health & social care | 2022 |
| Amanah Property Interior Design Ltd | Construction | 2021 |
| Amanda KIM Limited | Wholesale & retail | 2009 |
| Amarr TM Ltd | Construction | 2023 |
| Amazon Development Limited | Construction | 1995 |
| AMB Coventry Ltd | Wholesale & retail | 2013 |
| Ambassador Properties (Midlands) Limited | Real estate | 2014 |
| Amber Way Properties Limited | Professional & scientific | 2017 |
| AMD GAS and Plumbing Services Limited | Construction | 2015 |
| American Dessert & Bakery Ltd | Hospitality | 2020 |
| Ammar Mohammed Ltd | Construction | 2023 |
| Amore Beauty Ltd | Other services | 2026 |
| AMS QA Consultancy Ltd | Professional & scientific | 2012 |
| AMU Mart Ltd | Wholesale & retail | 2026 |
| Amuse 2016 Ltd. | Arts & recreation | 2016 |
| Anapano Ltd | Hospitality | 2019 |
| Anax Consultancy Services Limited | Professional & scientific | 2021 |
| Anca Industrial Supplies Limited | Wholesale & retail | 1984 |
| Anca Properties Limited | Real estate | 2009 |
| Anca Tapes Limited | Extraterritorial | 1997 |
| Anderson Noble Estates Limited | Real estate | 2010 |
| Anderson Noble Limited | Real estate | 2007 |
| Andreea Rogoveanu Ltd. | Health & social care | 2016 |
| Andrugen Ltd | Wholesale & retail | 2023 |
| Andtransport Limited | Transport & logistics | 2025 |
| Aneesa Dawood Ltd | Wholesale & retail | 2026 |
| Anembo Engineering Ltd | Manufacturing | 2011 |
| Anew Young People Services Limited | Hospitality | 2011 |
| Angel-Inside Limited | Wholesale & retail | 2026 |
| Angela Marsons Author Ltd | Arts & recreation | 2016 |
| Angell Property Limited | Real estate | 2021 |
| Angling Supplies Limited | Administrative & support | 2009 |
| Angrost Ltd | Professional & scientific | 2026 |
| ANH Brothers 1 Ltd | Hospitality | 2026 |
| Ankh Pets Ltd | Wholesale & retail | 2020 |
| ANN Richards Payroll Services Limited | Professional & scientific | 2000 |