| AMB Web Solutions Ltd | Information & communication | 2022 |
| Amber Festive Ltd | Hospitality | 2025 |
| Amber Food Group Ltd | Manufacturing | 2016 |
| Amber Lodge Holdings Ltd | Other services | 2024 |
| Amber Logistic Solutions Ltd | Transport & logistics | 2020 |
| Amberdo Ltd | Wholesale & retail | 2021 |
| Amberix Ltd | Manufacturing | 2025 |
| Amberly Solutions Limited | Administrative & support | 2022 |
| Amberoglesfit Ltd | Arts & recreation | 2025 |
| Amberray Limited | Administrative & support | 2025 |
| Ambiental Environmental Assessment Limited | Professional & scientific | 2016 |
| Ambiental Technical Solutions Limited | Professional & scientific | 2002 |
| Amblecroft Limited | Professional & scientific | 1988 |
| Ambleside Holdings Limited | Financial services | 2016 |
| Amblewood Cattery Ltd | Other services | 2022 |
| Amblewood Doggy Daycare Ltd | Other services | 2025 |
| Amblewood Kennels Ltd | Other services | 2022 |
| Ambrosden (NO2) Residents Company Limited | Households | 2002 |
| Ambrosden Residents Company Limited | Households | 1997 |
| Ambroxtershire Ltd | Professional & scientific | 2025 |
| Ambu-Kare (UK) Limited | Health & social care | 2007 |
| Ambulance Medical & Training Solutions Limited | Education | 2025 |
| AMC Assets Management Ltd | Administrative & support | 2021 |
| AMC Direct Limited | Wholesale & retail | 2005 |
| AMC Fresh (UK) Limited | Administrative & support | 2011 |
| AMC Fresh Juices Investments (UK) Ltd | Financial services | 2018 |
| AMC Plastering and Artexing Ltd | Construction | 2026 |
| AMC Real Estate Limited | Households | 2016 |
| AMD Autos Limited | Wholesale & retail | 2019 |
| Ameer Investments Ltd | Real estate | 2025 |
| Ameera Travel Ltd | Administrative & support | 2025 |
| Amelio Homes Ltd | Real estate | 2016 |
| American Artiste Limited | Information & communication | 2013 |
| American Orthodontics (UK) Limited | Health & social care | 2002 |
| American Rugby Scholarships Ltd | Arts & recreation | 2025 |
| Americano Vape Store Ltd | Wholesale & retail | 2025 |
| Amet Holdings Ltd | Financial services | 2025 |
| Amethyst Medicare Ltd | Health & social care | 2025 |
| Amewor Consultancy Ltd | Information & communication | 2023 |
| Amfajf Group Limited | Professional & scientific | 2024 |
| Amfajf Holdings Limited | Professional & scientific | 2024 |
| Amfajf Investments Limited | Professional & scientific | 2024 |
| AMG Automotive Ltd | Wholesale & retail | 2024 |
| AMG Autos 2 Ltd | Wholesale & retail | 2026 |
| AMG Claims Ltd | Administrative & support | 2004 |
| AMG Drive Ltd | Transport & logistics | 2025 |
| AMG Motor Vehicles Ltd | Wholesale & retail | 2024 |
| AMG Motor Vehicles Services Ltd | Wholesale & retail | 2026 |
| AMG Optical Ltd | Wholesale & retail | 2021 |
| AMI Excellency Transport Ltd | Transport & logistics | 2023 |
| Amiable Living Ltd | Real estate | 2022 |
| Amicis Maintenance Limited | Construction | 2022 |
| Amigo Chem Limited | Manufacturing | 2009 |
| Amilly International Limited | Wholesale & retail | 2002 |
| Amina Begum Ltd | Real estate | 2024 |
| Amina Spices Ltd | Hospitality | 2024 |
| Amir Grill Point Ltd | Hospitality | 2025 |
| Amir Store Ltd | Wholesale & retail | 2024 |
| Amite Ltd | Information & communication | 2017 |
| AMK Paint Ltd | Wholesale & retail | 2026 |
| AMK Peterborough Fruit Services Ltd | Manufacturing | 2018 |
| Amman and Co Properties Ltd | Real estate | 2024 |
| Ammar Cabs Ltd | Transport & logistics | 2023 |
| Ammar Food Store Ltd. | Wholesale & retail | 2017 |
| AMN Foods Ltd | Wholesale & retail | 2017 |
| Amneh’S Boutique Ltd | Wholesale & retail | 2024 |
| Amon Sales Ltd | Wholesale & retail | 2026 |
| Amor Beauty Ltd | Other services | 2025 |
| Amor Boutique Limited | Wholesale & retail | 2025 |
| Amore Care Services Ltd | Health & social care | 2023 |
| Amore Dolci Ltd | Hospitality | 2023 |
| Amos Barber (Properties) Limited | Households | 2014 |
| Amos Barber Estate Management Limited | Real estate | 2003 |
| Amos Morgan Consulting Limited | Manufacturing | 2002 |
| AMP Catering Ltd | Hospitality | 2024 |
| AMP Overseas Limited | Wholesale & retail | 2019 |
| Amped UP AV Ltd | Arts & recreation | 2026 |
| Ampris Limited | Financial services | 2011 |
| Amri Fashion Ltd | Wholesale & retail | 2017 |
| Amrshaker Ltd | Health & social care | 2026 |
| AMS Accountants Cambs Ltd | Professional & scientific | 2018 |
| AMS Consultancy Limited | Professional & scientific | 2006 |
| AMT Entertainment Ltd | Arts & recreation | 2019 |
| AMT Fresh Limited | Wholesale & retail | 2009 |
| AMT Welding Limited | Manufacturing | 2014 |
| Amtv Productions Limited | Information & communication | 2013 |
| Amtv Property Ltd | Real estate | 2021 |
| AMY Emporium Ltd | Wholesale & retail | 2025 |
| AMY Kenyon MED Ltd | Professional & scientific | 2024 |
| AMY Rentals and Property Ltd | Households | 2025 |
| AMZ Mudu Ltd | Wholesale & retail | 2026 |
| Amzbooks Ltd | Professional & scientific | 2023 |
| AN Other Takeaway Ltd | Hospitality | 2019 |
| AN Recruitment Ltd | Administrative & support | 2025 |
| ANA Merida Ltd | Wholesale & retail | 2014 |
| ANA S Touch Ltd | Other services | 2020 |
| ANA Zambrin Ltd | Wholesale & retail | 2025 |
| Anaa Holdings Ltd | Financial services | 2025 |
| Anaisy Cosmetics Ltd | Manufacturing | 2026 |
| Anajojo Limited | Health & social care | 2019 |