| Aligned Mind Training Ltd | Administrative & support | 2026 |
| Alison Whalley Limited | Professional & scientific | 2010 |
| Alium Software Ltd | Information & communication | 2022 |
| Alive to Thrive Ltd | Professional & scientific | 2018 |
| Aliya Habib Ltd | Health & social care | 2026 |
| Aliz Preston Limited | Hospitality | 2024 |
| Aljs Medical Ltd | Health & social care | 2023 |
| Alkafeel Marketing Ltd | Information & communication | 2025 |
| ALL Clear (Drainage Solutions) Limited | Administrative & support | 2008 |
| ALL Complete Limited | Construction | 2023 |
| ALL Floors Covered Ltd | Construction | 2024 |
| ALL for One Couriers Ltd | Transport & logistics | 2025 |
| ALL for One Investment Management Ltd | Real estate | 2023 |
| ALL Four Media Ltd | Information & communication | 2018 |
| ALL Green Solutions Group Ltd | Construction | 2023 |
| ALL Honey Ltd | Wholesale & retail | 2007 |
| ALL Hours Preston Ltd | Wholesale & retail | 2025 |
| ALL Law Limited | Professional & scientific | 2022 |
| ALL Moves (North West) Ltd | Transport & logistics | 2022 |
| ALL Moves - Preston Ltd | Transport & logistics | 2019 |
| ALL Moves Preston Self Drive Van Hire Ltd | Administrative & support | 2024 |
| ALL Numbers Matter Limited | Professional & scientific | 2011 |
| ALL on the Web Limited | Professional & scientific | 2007 |
| ALL Pave Landscaping Ltd | Construction | 2026 |
| ALL Power Trading Ltd | Wholesale & retail | 2022 |
| ALL Seasons Gardening Limited | Other services | 2003 |
| ALL Seasons Lawncare Limited | Administrative & support | 2010 |
| ALL Smokes Ltd | Wholesale & retail | 2020 |
| ALL Star Roofing Limited | Construction | 2013 |
| ALL Stars Londis Limited | Wholesale & retail | 2020 |
| ALL the Platforms Limited | Information & communication | 2020 |
| ALL Things Eczema Ltd | Health & social care | 2024 |
| ALL Words Limited | Administrative & support | 2008 |
| Allan's Bobcat Ltd | Construction | 2025 |
| Allans Barbering Academy Limited | Other services | 2024 |
| Allans Barbers 355 Limited | Other services | 2019 |
| Allans Barbers 506 Limited | Other services | 2022 |
| Allanyas Acrylics Ltd | Other services | 2024 |
| Allapharma Ltd | Wholesale & retail | 2021 |
| Allen Property Ltd | Real estate | 2017 |
| Allen Reid Limited | Information & communication | 1998 |
| Alliance Distribution Group Limited | Wholesale & retail | 2021 |
| Alliance Distribution Limited | Wholesale & retail | 2021 |
| Alliance Imports Ltd | Wholesale & retail | 2017 |
| Alliance Leisure Enterprises Limited | Hospitality | 2014 |
| Allied Couriers Ltd | Other services | 2009 |
| Allied Developments (M/Cr) Limited | Construction | 1997 |
| Allied Distribution Trading FZE Ltd | Wholesale & retail | 2026 |
| Allied EYE Care Limited | Health & social care | 2021 |
| Allied Garage Services Ltd | Wholesale & retail | 2025 |
| Allied Healthcare Providers Ltd | Administrative & support | 2025 |
| Allied Lighting Limited | Wholesale & retail | 2006 |
| Allied Mastclimbers & Hoists Ltd | Other services | 2016 |
| Allied Scaffolding Limited | Construction | 1983 |
| Allison Protection Specialists Ltd | Financial services | 2018 |
| Allrange Group Ltd | Wholesale & retail | 2026 |
| Allu Enterprises Ltd | Wholesale & retail | 2015 |
| Allure Hair and Beauty (Preston) Limited | Other services | 2016 |
| Allusion Attire Limited | Wholesale & retail | 2025 |
| Allveron Limited | Administrative & support | 2007 |
| Ally Fire & Security Ltd | Administrative & support | 2025 |
| Alma Media (Training & Consultancy Services) Limited | Information & communication | 2023 |
| Almai Property Management Ltd | Health & social care | 2006 |
| Almar Rentals Ltd | Administrative & support | 2009 |
| Almarice Ltd | Administrative & support | 2003 |
| Almas Aesthetics Limited | Other services | 2018 |
| Almond Brook Management Company NO 2 Ltd | Households | 2007 |
| Almond Civils Limited | Construction | 2013 |
| Almonte Holdings Limited | Financial services | 2026 |
| ALN Plumbing Limited | Construction | 2011 |
| Aloms Properties Ltd | Real estate | 2024 |
| Alora and Co Jewellery Ltd | Manufacturing | 2026 |
| Alpha Advertising Agency Limited | Professional & scientific | 2020 |
| Alpha One Oriental Limited | Health & social care | 2012 |
| Alpha Suppliers UK Limited | Wholesale & retail | 2019 |
| Alpha Tile & Stone UK Ltd | Construction | 2021 |
| Alpha Travel & Wholesale Limited | Wholesale & retail | 2026 |
| Alphaa Properties Ltd | Construction | 2020 |
| Alphaled Lighting Limited | Manufacturing | 2020 |
| Alphamotion Limited | Professional & scientific | 2012 |
| Alphap Planning and Engineering Projects UK Limited | Professional & scientific | 2025 |
| Alphaplas International Limited | Professional & scientific | 2001 |
| Alpine Trading Group Ltd | Wholesale & retail | 2022 |
| Alpitronic UK Ltd | Manufacturing | 2023 |
| Alquds Mediterranean Ltd | Hospitality | 2025 |
| Alreefi Medical Ltd | Health & social care | 2025 |
| Alshifa Solutions Limited | Health & social care | 2023 |
| Alsico Aurora Limited | Information & communication | 2024 |
| Alsico Laucuba Ltd | Manufacturing | 2007 |
| Alston Dairy Limited | Wholesale & retail | 1997 |
| Alston Pre-Applied Limited | Manufacturing | 1980 |
| Alstonbridge Recruitment Ltd | Administrative & support | 2025 |
| ALT Golf Supply Ltd | Wholesale & retail | 2024 |
| ALT Highways Ltd | Construction | 2025 |
| Altair FIN Ltd | Financial services | 2024 |
| Altave Group Limited | Professional & scientific | 2021 |
| Altcar Property Holdings Limited | Financial services | 2020 |
| Altcar Property Limited | Agriculture & fishing | 2020 |
| Altd Productions Ltd | Arts & recreation | 2025 |
| Altera Property Ltd | Real estate | 2024 |