| Amar ALI Ltd | Other services | 2019 |
| Amarin Leeds Ltd | Hospitality | 2026 |
| Amarna Yorkshire Limited | Real estate | 2020 |
| Amaroc Limited | Wholesale & retail | 2013 |
| Amarzuri Limited | Manufacturing | 2023 |
| Amateur Boxing Union Limited | Arts & recreation | 2002 |
| Amats Endoteam Ltd | Real estate | 2024 |
| Amaura Financial Planning Ltd | Professional & scientific | 2025 |
| Amaura Properties Ltd | Other services | 2019 |
| Amaz Mohammed Consultancy Ltd | Administrative & support | 2015 |
| Amaze Cleaning Services Ltd | Administrative & support | 2023 |
| Amaze Nest Sales Limited | Wholesale & retail | 2025 |
| Amazing Engineering Limited | Construction | 2024 |
| Amazing Grace Consult UK Limited | Health & social care | 2015 |
| Amazing Grace Early Years Childcare Ltd | Education | 2016 |
| Amazing Life Church Limited | Other services | 2019 |
| Amazing Product Trading Limited | Wholesale & retail | 2021 |
| Amazinggraceoutlets Ltd | Wholesale & retail | 2026 |
| Amazon Flex Limited | Transport & logistics | 2025 |
| Amazulu Limited | Health & social care | 2024 |
| AMB Fashion Limited | Wholesale & retail | 2024 |
| AMB Hope Limited | Wholesale & retail | 2019 |
| Ambaah Ltd | Administrative & support | 2025 |
| Ambal Investments Limited | Real estate | 2023 |
| Ambassador Barbering Limited | Other services | 2019 |
| Amber Fern UN- Limited | Professional & scientific | 2025 |
| Amber Heating Services Ltd | Construction | 2017 |
| Amber Rose Holdings Ltd | Financial services | 2024 |
| Ambergate UK Limited | Financial services | 2008 |
| Amberhawk Limited | Extraterritorial | 2011 |
| Amberhawk Training Limited | Professional & scientific | 2008 |
| Amberstone Developments (North Yorkshire) Limited | Construction | 2018 |
| Amberstone Developments (Yorkshire) Ltd | Construction | 2013 |
| Amberwill Consulting Ltd | Information & communication | 2018 |
| Amberwood Chase Management Company Limited | Households | 2014 |
| Amberwrite Ltd | Professional & scientific | 2012 |
| Ambience Air Limited | Wholesale & retail | 2026 |
| Ambience Engineering Limited | Professional & scientific | 2010 |
| Ambience York Ltd | Other services | 2026 |
| Ambient Technology Ltd | Extraterritorial | 2013 |
| Ambient-Imports Limited | Information & communication | 2013 |
| Ambiently Enterprises Ltd | Agriculture & fishing | 2020 |
| Ambika Limited | Real estate | 2024 |
| Ambiris Ltd | Administrative & support | 2021 |
| Ambition Propertiez Ltd | Real estate | 2025 |
| Ambitious Group Services Ltd | Wholesale & retail | 2014 |
| Ambivo Ltd | Manufacturing | 2024 |
| Ambler Ventures Limited | Wholesale & retail | 2020 |
| Ambna Limited | Information & communication | 2017 |
| Ambrozzia Ltd | Wholesale & retail | 2025 |
| Amby Project Solutions Ltd | Construction | 2024 |
| AMC Software Ltd | Information & communication | 2019 |
| Amcb Consultancy Ltd | Administrative & support | 2025 |
| Amcl Systems Engineering Limited | Professional & scientific | 2002 |
| Amco Giffen Limited | Extraterritorial | 2008 |
| Amco Group Holdings Limited | Professional & scientific | 2008 |
| Amco Group Limited | Professional & scientific | 2008 |
| AMD Resources Ltd | Wholesale & retail | 2022 |
| Amdk Governance Solutions Limited | Professional & scientific | 2021 |
| AME Style Ltd | Wholesale & retail | 2022 |
| Amea Retail Ltd | Wholesale & retail | 2023 |
| Ameana Ltd. | Professional & scientific | 2000 |
| Ameazy Direct Ltd | Wholesale & retail | 2021 |
| Amech Engineering Ltd | Professional & scientific | 2014 |
| Amedea Construct Ltd | Construction | 2020 |
| Ameds Medical Ltd | Health & social care | 2023 |
| Ameenzo PVT Ltd | Wholesale & retail | 2025 |
| Ameigh Insights Limited | Information & communication | 2017 |
| Amek Holdings Limited | Administrative & support | 2024 |
| Amelia Holdings Limited | Professional & scientific | 2025 |
| Amelia Jane Smith Ltd | Arts & recreation | 2018 |
| Amen Care Services Ltd | Health & social care | 2023 |
| Amen Health Care Limited | Health & social care | 2016 |
| Ameni Barbers Ltd | Other services | 2024 |
| Amentestimony Ltd | Health & social care | 2022 |
| Ameresco Limited | Construction | 2008 |
| Ameresco Sunel Energy Limited | Construction | 2023 |
| American Fried Chicken Leeds Ltd | Hospitality | 2023 |
| Amethyst 247 Support Ltd | Health & social care | 2024 |
| Ametia Limited | Construction | 2021 |
| Amey Highways Lighting (Manchester) Limited | Construction | 2003 |
| Amey Highways Lighting (Wakefield) Limited | Administrative & support | 2002 |
| Amey Infrastructure Management (1) Limited | Financial services | 2017 |
| Amezal Capital Limited | Construction | 2026 |
| Amezeen Care and Compliance Solutions Limited | Professional & scientific | 2025 |
| AMF Bakery Systems (UK) Limited | Manufacturing | 2016 |
| Amfe Consultancy Ltd | Professional & scientific | 2023 |
| Amflo Ltd | Professional & scientific | 2022 |
| AMG Group Investments Ltd | Real estate | 2020 |
| AMG Hire Equities Ltd | Administrative & support | 2025 |
| AMG Truck Repairs Limited | Transport & logistics | 2016 |
| AMG World Ltd | Information & communication | 2017 |
| AMH Acquisitions Ltd | Administrative & support | 2016 |
| AMH Finance Limited | Financial services | 2013 |
| AMH GAS Services Ltd | Construction | 2025 |
| Amhh Ltd | Professional & scientific | 2018 |
| AMI & Maya Investments Ltd | Real estate | 2026 |
| AMI Park Ltd | Professional & scientific | 2025 |
| Amica Aesthetics Academy Ltd | Education | 2020 |
| Amica Aesthetics Limited | Other services | 2015 |