| Altered Matrix Limited | Information & communication | 2025 |
| Alternative Lighting Solutions Ltd | Wholesale & retail | 2012 |
| Altham Car Recyclers Limited | Wholesale & retail | 2003 |
| Althea Talking Therapy Ltd | Administrative & support | 2017 |
| Altinmarka UK Limited | Wholesale & retail | 2025 |
| Altius Group Holdings Limited | Financial services | 2025 |
| Altius Group Limited | Administrative & support | 2008 |
| Alto Automotive Limited | Transport & logistics | 2009 |
| Alto Fleet Services Limited | Transport & logistics | 2018 |
| Alto MAR Media Ltd | Information & communication | 2021 |
| Alto Roofing & Construction Ltd | Construction | 2011 |
| Alton Systems Limited | Information & communication | 2026 |
| Altruists Pro Ltd | Education | 2021 |
| Altura AB Ltd | Professional & scientific | 2025 |
| Altura Holdings Group Ltd | Financial services | 2025 |
| Alty Law Ltd | Professional & scientific | 2023 |
| Aluexpert Ltd | Education | 2025 |
| Alusid Limited | Manufacturing | 2012 |
| Alusto Ltd | Information & communication | 2025 |
| Alvey Group Ltd | Administrative & support | 2022 |
| Alvisean Ltd | Health & social care | 2021 |
| ALW Group (NW) Limited | Construction | 2025 |
| Alwari Driving School Ltd | Education | 2021 |
| Alwasila Mind Matters Limited | Health & social care | 2024 |
| Always Different Ltd | Wholesale & retail | 2019 |
| Alwitry Medicolegal Services Limited | Health & social care | 2020 |
| ALX Civils Ltd | Construction | 2024 |
| Alyn Foundry and Sons Ltd | Wholesale & retail | 2023 |
| AM & CG Limited | Financial services | 2024 |
| AM (Preston) Limited | Professional & scientific | 2010 |
| AM Assets & Investments Ltd | Wholesale & retail | 2019 |
| AM Audit Limited | Professional & scientific | 2013 |
| AM Brickwork and Pointing Specialists Ltd | Construction | 2021 |
| AM Civils & Groundworks Ltd | Construction | 2023 |
| AM Educational Services Ltd | Professional & scientific | 2023 |
| AM Foods (NW) Ltd | Hospitality | 2017 |
| AM Gerrard Ltd | Professional & scientific | 2003 |
| AM Group (North West) Limited | Transport & logistics | 2017 |
| AM Highgate Ltd | Real estate | 2024 |
| AM Properties (NW) Ltd | Real estate | 2017 |
| AM Properties North West Ltd | Real estate | 2026 |
| AM Trading NW Limited | Wholesale & retail | 2023 |
| AM1 Hairdressing Ltd | Other services | 2012 |
| AM135 Builders Ltd | Construction | 2026 |
| AMA Buy Ltd | Wholesale & retail | 2024 |
| AMA Dataset Limited | Information & communication | 1991 |
| AMA Great Finance UK Ltd | Administrative & support | 2026 |
| AMA Optical Ltd | Health & social care | 2018 |
| AMA Vape Distribution Ltd | Wholesale & retail | 2019 |
| AMA Vape LAB Limited | Wholesale & retail | 2017 |
| Amaan Duffer Ltd | Wholesale & retail | 2019 |
| Amaan Properties Limited | Construction | 2014 |
| Amaan Properties SPV Ltd | Real estate | 2022 |
| Amaanah Logistics Ltd | Hospitality | 2016 |
| Amabo Ltd | Health & social care | 2023 |
| Amach Ltd | Real estate | 2021 |
| Amaco Services Limited | Professional & scientific | 2024 |
| Amaculate Aesthetics Limited | Other services | 2021 |
| Amadea Shop Limited | Wholesale & retail | 2023 |
| Amagineering Limited | Wholesale & retail | 2018 |
| Amak IT Services Ltd | Information & communication | 2022 |
| Amal Property Ltd | Households | 2018 |
| Amanah Estates Ltd | Real estate | 2024 |
| Amanat Properties Ltd | Real estate | 2025 |
| Amanda's Kitchen Ltd | Hospitality | 2021 |
| Amara Group Ltd | Extraterritorial | 2024 |
| Amara Print Ltd | Other services | 2009 |
| Amari Classiche Ltd | Wholesale & retail | 2014 |
| Amari Lifestyle Limited | Wholesale & retail | 2009 |
| Amazing Dancing Bear Ltd | Hospitality | 2023 |
| Amazing Nails TVB Ltd | Other services | 2017 |
| Amazon Store Limited | Wholesale & retail | 2026 |
| Amazontinu Ltd | Wholesale & retail | 2025 |
| Amazy Ltd | Wholesale & retail | 2019 |
| AMB HR Consulting Limited | Administrative & support | 2016 |
| AMB Resort Ltd | Wholesale & retail | 2024 |
| Ambalath Ltd | Wholesale & retail | 2025 |
| Ambassador Motorcycles Limited | Wholesale & retail | 2020 |
| Ambedo Ltd | Information & communication | 2020 |
| Amber Food Services Ltd | Hospitality | 2020 |
| Amber IT (NW) Limited | Information & communication | 2015 |
| Amber Trade Limited | Wholesale & retail | 2023 |
| Amberville Ltd | Construction | 2000 |
| Ambient Concept Builders Ltd | Construction | 2021 |
| Ambient Engineering Services Ltd | Manufacturing | 2015 |
| Ambient Plumbing & Heating Services Ltd | Construction | 2022 |
| Ambient Spas Ltd | Construction | 2021 |
| Ambikay Limited | Financial services | 2022 |
| Ambledene Limited | Professional & scientific | 2013 |
| Ambrose Court Management Committee (Leyland) Limited | Households | 2002 |
| Ambrose Hire Limited | Administrative & support | 1979 |
| Ambulance Parts Limited | Manufacturing | 2010 |
| Ambulant Physiotherapy Ltd | Health & social care | 2010 |
| AMC Asset Management Limited | Administrative & support | 2019 |
| AMC Consult Limited | Professional & scientific | 2012 |
| AMC Design Engineering Ltd | Manufacturing | 2013 |
| AMC Scaffolding NW Ltd | Construction | 2021 |
| AMD Creations Ltd | Professional & scientific | 2020 |
| AMD North Limited | Real estate | 2023 |
| Amdavadi Tava and Chinese Limited | Hospitality | 2026 |