| Alpha One Rail Solutions Ltd | Construction | 2015 |
| Alphasonics (Ultrasonic Cleaning Systems) Ltd. | Manufacturing | 1993 |
| Alpho Technical Limited | Information & communication | 2011 |
| ALS Group Assayers Limited | Professional & scientific | 2009 |
| ALS Holdings Group Limited | Mining & quarrying | 2006 |
| ALS Inspection UK Limited | Professional & scientific | 1975 |
| ALS Testing Services (UK) Limited | Mining & quarrying | 2011 |
| ALS UK (Holdings) Limited | Mining & quarrying | 2013 |
| AM Paving (NW) Ltd | Construction | 2026 |
| Amano Club Ltd | Hospitality | 2026 |
| Amax Aesthetics Ltd | Other services | 2016 |
| Ambassador Security Solutions Group Ltd | Administrative & support | 2021 |
| Ambassador Training Academy Ltd | Education | 2023 |
| AMC Propco Ltd | Construction | 2021 |
| Ameer Medical Services Ltd | Health & social care | 2019 |
| Amelia Social Care Limited | Health & social care | 2021 |
| Amyann Homes Limited | Real estate | 2003 |
| Anarlo Limited | Professional & scientific | 2021 |
| Anchor Builders Limited | Construction | 2001 |
| Anchor Homes (North West) Limited | Construction | 2001 |
| Ancient Herbal Health Ltd | Wholesale & retail | 2025 |
| Andbridge Property Limited | Real estate | 2014 |
| Anderton Property Limited | Real estate | 2021 |
| Andrea E Lindsay Ltd. | Other services | 2016 |
| Andrew's Court Management Co Ltd. | Households | 2004 |
| Androsin Ltd | Health & social care | 2022 |
| Andy Burrows GAS Ltd | Wholesale & retail | 2022 |
| Angel Management Consulting Limited | Professional & scientific | 2016 |
| Angela Clarke Ltd | Health & social care | 2014 |
| Angela Taylor School of Motoring Ltd | Education | 2018 |
| Angson Limited | Professional & scientific | 2023 |
| Ansirag UK Ltd | Health & social care | 2025 |
| Antonym Studio Ltd | Wholesale & retail | 2024 |
| Anvil PAI Solutions Ltd | Real estate | 2025 |
| AP Plumbing (Northwest) Limited | Construction | 2025 |
| AP Property Investments North West Ltd | Real estate | 2016 |
| Apex Exterior Cleaning Ltd | Administrative & support | 2025 |
| Apex Retail Consulting Ltd | Professional & scientific | 2011 |
| APM Contracting Limited | Financial services | 2014 |
| Apollo Active Community Interest Company | Education | 2020 |
| Apollo Active Education Ltd | Education | 2024 |
| Apollo Inclusive Ltd | Health & social care | 2025 |
| Aqualink Consultancy Limited | Professional & scientific | 2015 |
| Aquaventure Scuba Academy UK Ltd | Education | 2021 |
| ARC Build & Design Ltd | Construction | 2026 |
| Archbrook (Tuebrook) Management Company Limited | Households | 2003 |
| Ardath Limited | Information & communication | 2023 |
| Arden Hughes Limited | Administrative & support | 2025 |
| Aresti Developments Ltd | Real estate | 2015 |
| Argo Street Ltd | Professional & scientific | 2024 |
| Ariel Kayla Ltd | Real estate | 2020 |
| ARM Properties (NW) Ltd | Real estate | 2018 |
| Arrow OH Limited | Health & social care | 2023 |
| Art of Grappling Limited | Arts & recreation | 2025 |
| Artec Group Ltd | Construction | 2019 |
| Artelier Hair (Formby) Limited | Other services | 2016 |
| Artistic Arrangements Ltd | Wholesale & retail | 2003 |
| Arvin Enterprise Limited | Wholesale & retail | 2026 |
| AS Lean Solutions Ltd | Professional & scientific | 2018 |
| Asbestos Services UK Ltd | Construction | 2009 |
| Ascend Living Limited | Real estate | 2025 |
| Asemota Consulting Ltd | Information & communication | 2024 |
| Aset Hospital Limited | Health & social care | 2012 |
| ASG Hire Solutions Ltd | Administrative & support | 2026 |
| Asghar Properties Limited | Extraterritorial | 2015 |
| Ashall Surveyors Ltd | Professional & scientific | 2019 |
| Ashley House Aesthetics Ltd | Other services | 2024 |
| Askew Housing Ltd | Real estate | 2023 |
| Aspect Drainage Solutions Ltd | Water & waste | 2024 |
| Aspire Blinds Limited | Construction | 2021 |
| Assetto Fiorano Limited | Administrative & support | 2025 |
| Assisstar Ltd | Manufacturing | 2019 |
| Asureq Agricultural Limited | Agriculture & fishing | 2023 |
| ASW Integrated Systems Ltd | Construction | 2022 |
| Atmospheric Technologies Limited | Manufacturing | 2016 |
| ATS Events Ltd | Information & communication | 2022 |
| Atzaro Investments Limited | Real estate | 2019 |
| Auditive Limited | Professional & scientific | 2015 |
| Aura Medical Group Limited | Health & social care | 2025 |
| Aura Properties Cheshire Ltd | Real estate | 2026 |
| Aurelia Capital Holdings Ltd | Financial services | 2025 |
| Autotelic Limited | Information & communication | 2011 |
| Avoir Ltd | Professional & scientific | 2018 |
| Aztec Building & Construction Limited | Construction | 2015 |
| Azul Monkey Limited | Hospitality | 2020 |
| Azzura Travel Ltd | Administrative & support | 2019 |
| B & P Insulation Ltd | Extraterritorial | 2018 |
| B K B Technical Services Limited | Administrative & support | 2006 |
| B.Black Scaffolding Ltd | Construction | 2026 |
| Baba Burgerz Prescot Ltd | Hospitality | 2024 |
| Backztitch Ltd | Wholesale & retail | 2024 |
| BAD Hunter Limited | Hospitality | 2021 |
| Badgers Close (Rainhill) Management Limited | Professional & scientific | 2016 |
| Balfour Beatty Pension Trust Limited | Financial services | 1948 |
| Balleycliff Ltd | Professional & scientific | 2019 |
| Baltic Lettings Ltd | Real estate | 2025 |
| Bar Java Limited | Hospitality | 2024 |
| Barber 1 Blades Ltd | Other services | 2025 |
| Barkley Kappa Limited | Professional & scientific | 2025 |
| Barlow Telecomms Limited | Professional & scientific | 2023 |