| AMI Paris UK Ltd | Wholesale & retail | 2015 |
| Amic Food Limited | Hospitality | 2026 |
| Amica Accessories Limited | Wholesale & retail | 2012 |
| Amical Holdings Limited | Financial services | 2021 |
| Amical Veterinary Centre Limited | Professional & scientific | 2007 |
| Amics Food Ltd | Hospitality | 2026 |
| Amicus (Bristol) Limited | Financial services | 2012 |
| Amie Leigh Counselling Ltd | Financial services | 2012 |
| Amigo Electrical Limited | Manufacturing | 2016 |
| Amigos Cantina Ltd | Hospitality | 2025 |
| Amigos Cocina Ltd | Hospitality | 2020 |
| Amilop UK Ltd | Wholesale & retail | 2017 |
| Aminah K Ltd | Professional & scientific | 2022 |
| Amino Consulting Limited | Administrative & support | 2011 |
| Amir Yasir Ltd | Wholesale & retail | 2025 |
| AMIRATRANSVAN22 Ltd | Transport & logistics | 2023 |
| Amirlameyratattoo Limited | Arts & recreation | 2025 |
| Amit Bangre Consulting Limited | Professional & scientific | 2010 |
| Amitek Solutions Limited | Information & communication | 2020 |
| Amitha Retails Ltd | Wholesale & retail | 2024 |
| Amitus Ltd | Information & communication | 2025 |
| Amivet Ltd | Professional & scientific | 2010 |
| AMJ Engineering and Repairs Ltd | Manufacturing | 2024 |
| AMJ Machinery Sales Ltd | Wholesale & retail | 2025 |
| AMJ Motorz Limited | Wholesale & retail | 2025 |
| AMJ Property Developments Ltd | Real estate | 2017 |
| Amja Holidays Limited | Administrative & support | 2014 |
| AMK Repairs Ltd | Construction | 2025 |
| Amlex Limited | Real estate | 2015 |
| Amlwg Consulting Ltd | Professional & scientific | 2009 |
| Amma Lifestyle Ltd | Wholesale & retail | 2014 |
| Ammac UK Limited | Real estate | 2021 |
| Ammacus Trading Limited | Manufacturing | 2016 |
| AMMAR786FOOD Ltd | Hospitality | 2025 |
| Ammatti Communications Ltd | Professional & scientific | 2009 |
| Ammett Ltd | Professional & scientific | 2023 |
| Ammil Garden Design Ltd | Professional & scientific | 2022 |
| Amml Ltd | Health & social care | 2019 |
| Ammonite Design and Build Limited | Manufacturing | 2024 |
| Ammonite Limited | Information & communication | 1994 |
| Ammonite Training Solutions Ltd | Health & social care | 2026 |
| Ammoratai Ltd | Education | 2025 |
| Amne Hydration Ltd | Other services | 2025 |
| Amol Life Ltd | Financial services | 2024 |
| Amooti Ltd | Health & social care | 2023 |
| Amor Barcoding Solutions Limited | Other services | 2012 |
| Amor Lashes UK Ltd | Wholesale & retail | 2022 |
| Amore Coffee & Desserts Ltd | Hospitality | 2018 |
| Amorin Consultancy Services PVT Ltd | Information & communication | 2023 |
| Amoura Skin Limited | Other services | 2023 |
| Amovada Ltd | Information & communication | 2016 |
| AMP Channel Music Limited | Arts & recreation | 2007 |
| AMP Electrical Limited | Construction | 1983 |
| AMP Event Studios Limited | Administrative & support | 2025 |
| AMP Group of Companies Limited | Administrative & support | 2019 |
| AMP Imports Limited | Wholesale & retail | 2019 |
| AMP Merchandise LLP | | 2013 |
| Ampersand Advisory Limited | Professional & scientific | 2019 |
| Amphastar UK Ltd | Manufacturing | 2016 |
| Amphern Ltd | Real estate | 2023 |
| Amphora Aromatics Asia Limited | Wholesale & retail | 2022 |
| Amphora Aromatics Holdings Limited | Financial services | 2015 |
| Amphora Aromatics Limited | Wholesale & retail | 2015 |
| Ampl Bristol Ltd | Real estate | 2026 |
| Amplan Developments Limited | Construction | 2013 |
| Ample Electrical Ltd | Construction | 2015 |
| Ample Marketplace Ltd | Hospitality | 2025 |
| Amplified Copy Ltd | Professional & scientific | 2024 |
| Amplified Development Solutions Ltd | Administrative & support | 2026 |
| Amplify Education | Education | 2012 |
| Amplify HR Ltd | Administrative & support | 2024 |
| Amplify Music Portfolio Holdings Limited | Information & communication | 2025 |
| Amplify Records 131 Limited | Manufacturing | 2013 |
| Amplify Records 1310 Limited | Manufacturing | 2013 |
| Amplify Records 132 Limited | Manufacturing | 2013 |
| Amplify Records 133 Limited | Manufacturing | 2013 |
| Amplify Records 134 Limited | Manufacturing | 2013 |
| Amplify Records 135 Limited | Manufacturing | 2013 |
| Amplify Records 136 Limited | Manufacturing | 2013 |
| Amplify Records 137 Limited | Manufacturing | 2013 |
| Amplify Records 138 Limited | Manufacturing | 2013 |
| Amplify Records 139 Limited | Manufacturing | 2013 |
| Amplify Records 141 Limited | Manufacturing | 2014 |
| Amplify Records 142 Limited | Manufacturing | 2014 |
| Amplify Records 143 Limited | Manufacturing | 2014 |
| Amplify Records 144 Limited | Manufacturing | 2014 |
| Amplify Records 145 Limited | Manufacturing | 2014 |
| Amplify Records 161 Limited | Manufacturing | 2016 |
| Amplify Records 162 Limited | Manufacturing | 2016 |
| Amplify Records 163 Limited | Manufacturing | 2016 |
| Amplify Records 164 Limited | Manufacturing | 2016 |
| Amplify Records 165 Limited | Manufacturing | 2016 |
| Amplify Songs 131 Limited | Arts & recreation | 2013 |
| Amplify Songs 1310 Limited | Arts & recreation | 2013 |
| Amplify Songs 132 Limited | Arts & recreation | 2013 |
| Amplify Songs 133 Limited | Arts & recreation | 2013 |
| Amplify Songs 134 Limited | Arts & recreation | 2013 |
| Amplify Songs 135 Limited | Arts & recreation | 2013 |
| Amplify Songs 136 Limited | Arts & recreation | 2013 |
| Amplify Songs 137 Limited | Arts & recreation | 2013 |