| Ambrosia Properties Limited | Real estate | 2017 |
| Ambush Group Ltd | Wholesale & retail | 2025 |
| AMC Accountancy & Business Support Solutions Ltd. | Professional & scientific | 2017 |
| AMC Commercials Limited | Construction | 2012 |
| AMC Developments (NE) Limited | Construction | 2022 |
| AMC Marketing Consultants Limited | Professional & scientific | 2018 |
| AMC Telecommunications Ltd | Information & communication | 2023 |
| Amcc Properties Ltd | Real estate | 2018 |
| Amcc Property Ltd | Real estate | 2024 |
| Amcd Consultancy Limited | Professional & scientific | 2015 |
| Amco Services U.K Ltd | Other services | 2025 |
| Amcprint Ltd | Manufacturing | 2021 |
| AMD Facades Limited | Construction | 2026 |
| AMD GAS Limited | Construction | 2024 |
| Amdale Homes Ltd | Construction | 2019 |
| Amdel Medical Limited | Health & social care | 2004 |
| Amdl Properties Ltd | Real estate | 2025 |
| AME (North West) Ltd | Manufacturing | 2012 |
| Amea Services UK Ltd | Manufacturing | 2019 |
| Ameh Health Impact Ltd | Professional & scientific | 2026 |
| Amelia MJE Limited | Professional & scientific | 2014 |
| Amelliora Limited | Administrative & support | 2020 |
| Amend Ltd | Wholesale & retail | 2026 |
| Amenor Ltd | Wholesale & retail | 2026 |
| Ameon Consulting Limited | Professional & scientific | 2026 |
| Amer Business ORG Ltd | Administrative & support | 2025 |
| Amer Services Ltd | Administrative & support | 2026 |
| American Candy & Grocery Ltd | Wholesale & retail | 2025 |
| American Candy Liverpool Ltd | Hospitality | 2023 |
| American Candy Renshaw Street Ltd | Wholesale & retail | 2024 |
| American Christmas Ltd | Other services | 2022 |
| American LED Group Distribution Ltd | Wholesale & retail | 2025 |
| American Nails (L22) Limited | Other services | 2015 |
| American Nails (Liverpool) Limited | Other services | 2015 |
| American Pizza L9 Ltd | Hospitality | 2026 |
| American Pizza Slice Franchising Ltd | Hospitality | 2019 |
| American Shuffleboard Manufacturing (UK) Limited | | 1984 |
| Ames Goldsmith U.K. Limited | Manufacturing | 2006 |
| Amesbury 41 Limited | Households | 2014 |
| Ameslodge Ltd | Hospitality | 2012 |
| Ameta Essentials African & Carribean Superstore Ltd | Wholesale & retail | 2025 |
| Amethyst Residential Childcare Ltd | Health & social care | 2025 |
| Ametica Limited | Administrative & support | 2018 |
| Ametrine Consultancy Ltd | Professional & scientific | 2025 |
| Amex Freight International Limited | Wholesale & retail | 2025 |
| AMEYA6 Ltd | Information & communication | 2025 |
| AMF (Liverpool) Limited | Real estate | 2024 |
| AMF Investment Holdings Limited | Financial services | 2025 |
| Amforth Ltd | Professional & scientific | 2006 |
| AMG External Cleaning Services Limited | Administrative & support | 2023 |
| AMG SVR Limited | Real estate | 2024 |
| Amgb Ltd | Information & communication | 2002 |
| Amgs FM Limited | Administrative & support | 2023 |
| AMH Homes Ltd | Real estate | 2015 |
| AMH Surveyors Limited | Professional & scientific | 2022 |
| AMI Developments Limited | Construction | 2016 |
| AMI Security Ltd | Administrative & support | 2024 |
| Amiante Abatement Solutions Ltd | Water & waste | 2024 |
| Amiche Properties Ltd | Real estate | 2021 |
| Amici Painting Contractors Ltd | Construction | 2026 |
| Amiecare Ltd | Health & social care | 2023 |
| Amigos Pizza Formby Ltd | Hospitality | 2026 |
| Amila Maths Limited | Education | 2025 |
| Amin Consultancy NW Limited | Information & communication | 2017 |
| Amin Fresh Halal Ltd | Wholesale & retail | 2025 |
| Amin Telecom Ltd | Wholesale & retail | 2025 |
| Amina Health Care Limited | Health & social care | 2020 |
| Amiokaa Ltd | Professional & scientific | 2022 |
| Amion Consulting Limited | Professional & scientific | 2000 |
| Amion Group Limited | Financial services | 2022 |
| Amion Holdings Limited | Professional & scientific | 2018 |
| Amir Tattoo and Piercing Studio Limited | Arts & recreation | 2024 |
| Amirah Mariah Limited | Real estate | 2019 |
| AMJ Consultants Limited | Professional & scientific | 2008 |
| AMJ Corporate Holdings Limited | Financial services | 2017 |
| AMJ Support Services Ltd | Health & social care | 2013 |
| Amjdriverhire Ltd | Transport & logistics | 2019 |
| Amjs Investments Limited | Real estate | 2020 |
| AMK Consultancy Limited | Professional & scientific | 2021 |
| Amkha Trading Limited | Professional & scientific | 2018 |
| AML Elite Properties Ltd | Real estate | 2025 |
| AML Homes Limited | Real estate | 2020 |
| AML North West Limited | Hospitality | 2024 |
| AML Robinson Properties Limited | Real estate | 2024 |
| AMM Financial Ltd | Financial services | 2021 |
| AMM Property Management Ltd | Households | 2023 |
| Amman Properties Limited | Real estate | 2013 |
| Amman UK Jewellers Ltd | Wholesale & retail | 2021 |
| Amman UK Ltd | Real estate | 2022 |
| Ammar Mohammed Trading Company Ltd | Wholesale & retail | 2025 |
| Ammari Properties Ltd | Real estate | 2026 |
| Amme Properties Ltd | Real estate | 2026 |
| Ammegen Limited | Professional & scientific | 2017 |
| Ammi Floristry & Home Interiors Ltd | Wholesale & retail | 2023 |
| Ammy Medical Limited | Health & social care | 2020 |
| Amni (KS) Ltd | Hospitality | 2023 |
| Amni Consultants Limited | Construction | 2022 |
| AMO Care Services Ltd | Health & social care | 2024 |
| Amoco (Fiddich) Limited | Mining & quarrying | 1971 |
| Amoco Group Limited | Professional & scientific | 2019 |