| Alufold Direct Limited | Manufacturing | 2012 |
| Aluglaze Windows & Doors Ltd | Construction | 2022 |
| Aluminium Store.Co.Uk Ltd | Wholesale & retail | 2026 |
| Aluminium Trade Systems UK Ltd | Manufacturing | 2022 |
| Alun Barnes Consulting Ltd | Professional & scientific | 2024 |
| Alun Davies Marketing Ltd | Professional & scientific | 2019 |
| Aluna Care CIC | Arts & recreation | 2025 |
| Alusayd Pharma Limited | Professional & scientific | 2014 |
| Alustrade Limited | Extraterritorial | 2017 |
| Aluzen Ltd | Extraterritorial | 1999 |
| Aluzri Ltd | Information & communication | 2022 |
| ALV Beauty Studio Ltd | Wholesale & retail | 2025 |
| Alva Rail Ltd | Administrative & support | 2025 |
| Alvand Investments Ltd | Real estate | 2025 |
| Alvstap Limited | Construction | 2006 |
| Alvydas Services Ltd | Transport & logistics | 2017 |
| ALW Consulting Limited | Professional & scientific | 2022 |
| ALW Financial Solutions Ltd | Financial services | 2026 |
| ALW Hair Ltd | Other services | 2023 |
| Alwaseet Support Ltd | Administrative & support | 2026 |
| Always AIM With Everything Ltd | Professional & scientific | 2023 |
| Always Being YOU Ltd | Professional & scientific | 2022 |
| Always Over Dressed Ltd | Wholesale & retail | 2025 |
| Alwoodley Aesthetics Ltd | Other services | 2020 |
| Alwoodley Building and Construction Ltd | Construction | 2017 |
| Alwoodley Chase (Maintenance) Limited | Households | 1992 |
| Alwoodley Civils Limited | Construction | 2016 |
| Alwoodley Consulting Limited | Information & communication | 2024 |
| Alwoodley Court Flat Management Company Limited | Real estate | 1978 |
| Alwoodley Developments Ltd | Construction | 2014 |
| Alwoodley Gates (Leeds) Management Limited | Households | 2007 |
| Alwoodley Gates Management Company Limited | Households | 2002 |
| Alwoodley Genius Barbers Ltd | Other services | 2022 |
| Alwoodley MAN and Van Ltd | Transport & logistics | 2021 |
| Alwoodley Park News Ltd | Wholesale & retail | 2019 |
| Alwoodley Properties Limited | Real estate | 2003 |
| Alwoodley Search (ASL) Limited | Administrative & support | 2025 |
| Alwoodley Valeting Services Ltd | Administrative & support | 2019 |
| Alwoodleyhomes Limited | Households | 2023 |
| ALX Bird Limited | Wholesale & retail | 2025 |
| ALX Greenside Limited | Wholesale & retail | 2018 |
| Alyoura Limited | Professional & scientific | 2025 |
| Alytrans Leeds Limited | Transport & logistics | 2022 |
| Alzg Foods Ltd | Wholesale & retail | 2022 |
| Alzscents Essential Aromas Ltd | Manufacturing | 2021 |
| AM & MC Properties Limited | Real estate | 2020 |
| AM & P (Leeds) Ltd | Real estate | 2016 |
| AM 18 Limited | Administrative & support | 2017 |
| AM Accounting Services Ltd | Professional & scientific | 2015 |
| AM Aesthetic Surgery Limited | Health & social care | 2015 |
| AM and HZN Ltd | Wholesale & retail | 2022 |
| AM Beauty Glow Ltd | Other services | 2025 |
| AM Building Surveyors Limited | Professional & scientific | 2024 |
| AM Consultancy BFD Ltd | Professional & scientific | 2026 |
| AM Developments (Leeds) Ltd | Real estate | 2024 |
| AM Drama Academy Ltd | Education | 2025 |
| AM Driveways Media Ltd | Information & communication | 2026 |
| AM Engineering Global Ltd | Real estate | 2025 |
| AM Exclusive Ltd | Wholesale & retail | 2022 |
| AM Holdings and Investments Ltd | Financial services | 2024 |
| AM Hustle Ltd | Health & social care | 2021 |
| AM Lavasan Limited | Real estate | 2018 |
| AM Nominees Limited | Professional & scientific | 1984 |
| AM Properties (Leeds) Limited | Real estate | 2020 |
| AM Scaffolding (South West) Limited | Construction | 2014 |
| AM TEX Training Ltd | Arts & recreation | 2024 |
| AM to PM Rentals Limited | Hospitality | 2025 |
| AM Wallshielding Limited | Construction | 2025 |
| AM Wholesale Ltd | Wholesale & retail | 2024 |
| Am-Dev Ltd | Information & communication | 2025 |
| Am-Group Investments Ltd | Real estate | 2025 |
| Am-Lec Electrical Services Ltd | Construction | 2014 |
| AM4 Capital Ltd | Real estate | 2021 |
| AM4 Contracts Ltd | Construction | 2017 |
| AMA Associates Ltd | Professional & scientific | 2021 |
| AMA Lifts Limited | Construction | 2008 |
| AMA Marketing Limited | Professional & scientific | 2025 |
| AMA Realisations Ltd | Manufacturing | 2017 |
| Amaak Ltd | Real estate | 2014 |
| Amaali Limited | Wholesale & retail | 2012 |
| Amaan Developments Ltd | Real estate | 2024 |
| Amaan Furniture Ltd | Wholesale & retail | 2024 |
| Amaari London Ltd | Wholesale & retail | 2025 |
| Amacon Building Solutions Limited | Real estate | 2010 |
| Amad Construction Ltd | Construction | 2025 |
| Amad Limited | Real estate | 2023 |
| Amado Investments Ltd | Professional & scientific | 2018 |
| Amain Consulting Ltd | Professional & scientific | 2023 |
| Amako Asian Shop Ltd | Wholesale & retail | 2025 |
| Amalfi Restaurant Limited | Hospitality | 2001 |
| Amalfi Yeadon Limited | Professional & scientific | 2016 |
| Amalgamated Construction Ltd | Construction | 1970 |
| Amalida Estates Ltd | Real estate | 2017 |
| Amalida Properties Ltd | Real estate | 2015 |
| Amalida Services Ltd | Professional & scientific | 2015 |
| Amalion Ltd | Professional & scientific | 2020 |
| Aman Shield Solutions Limited | Wholesale & retail | 2025 |
| Amanaah Developers Ltd | Construction | 2025 |
| Amanda Newdall Psychotherapist Ltd | Health & social care | 2022 |
| Amantia North Ltd | Construction | 2023 |