| AMG Legacy Limited | Arts & recreation | 2026 |
| AMH Accounting Solutions Limited | Professional & scientific | 2010 |
| AMH Group Nottingham Ltd | Professional & scientific | 2019 |
| AMH North Notts Ltd | Other services | 2019 |
| AMI Medical Limited | Manufacturing | 2009 |
| Amiable Ltd | Health & social care | 2015 |
| Amica Capital Cell 1 Ltd | Administrative & support | 2025 |
| Amica Capital Cell 2 Ltd | Administrative & support | 2025 |
| Amico Electrical Contracting Limited | Manufacturing | 2025 |
| Amicos Pizzaria Clifton Ltd | Hospitality | 2024 |
| Amicus Information Solutions Limited | Information & communication | 2008 |
| Amigo Vehicle Logistics Service Ltd | Transport & logistics | 2024 |
| Amigos (Nottingham) Limited | Hospitality | 2023 |
| Amigos Grill Ltd | Hospitality | 2026 |
| Amigos Pizza and Kebabs Limited | Hospitality | 2025 |
| Amilln Ltd | Construction | 2020 |
| Aminy Ltd | Wholesale & retail | 2026 |
| Amira East Midlands Limited | Wholesale & retail | 2015 |
| Amirab Limited | Wholesale & retail | 2015 |
| Amirchetty Limited | Health & social care | 2019 |
| Amirz Ltd | Wholesale & retail | 2026 |
| Amitchell Ltd | Other services | 2022 |
| Amity Wilson Limited | Real estate | 2023 |
| AMJ Creative Limited | Professional & scientific | 2021 |
| Amjs Consultancy Ltd | Public administration | 2025 |
| Amkk Couriers Ltd | Transport & logistics | 2025 |
| Amma Logistics Ltd | Transport & logistics | 2026 |
| Amma Transport Ltd | Transport & logistics | 2015 |
| Ammar & Brothers Ltd | Transport & logistics | 2023 |
| Ammar's Fragrances Ltd | Wholesale & retail | 2020 |
| Ammars Fragrances (Nottingham ) Ltd | Wholesale & retail | 2024 |
| Ammars Fragrances Store Ltd | Wholesale & retail | 2026 |
| Ammn UK Limited | Health & social care | 2015 |
| Ammo Corporation Ltd | Construction | 2024 |
| Ammukutty Limited | Real estate | 2024 |
| Amnaa Ltd | Wholesale & retail | 2026 |
| Amor Enterprises Ltd | Information & communication | 2025 |
| Amore Motors Ltd | Professional & scientific | 2026 |
| Amore's Ristorante Limited | Hospitality | 2003 |
| AMP Group Ltd | Information & communication | 2018 |
| AMP Secretarial Services Limited | Professional & scientific | 2016 |
| AMP Transport Ltd | Transport & logistics | 2022 |
| Ampco 115 Limited | Financial services | 2015 |
| Ampco 122 Limited | Other services | 2016 |
| Ampco 171 Limited | Financial services | 2025 |
| Amper-Uk Limited | Energy | 2017 |
| Amperneo Limited | Professional & scientific | 2019 |
| Ampersand Commercial Marketing Ltd | Professional & scientific | 2025 |
| Ampfield Meadows Management Limited | Households | 2023 |
| Ampharma Solutions Limited | Professional & scientific | 2017 |
| Amplified Motors Ltd | Wholesale & retail | 2025 |
| Amplitude Creative Limited | Arts & recreation | 2002 |
| Ampower Electrical Ltd | Construction | 2018 |
| Amptron Electrical Services Limited | Manufacturing | 2006 |
| Amptron Group Limited | Financial services | 2024 |
| AMQ Property Limited | Real estate | 2022 |
| AMR Acquisition Limited | Construction | 2025 |
| AMR Tuning Ltd | Professional & scientific | 2026 |
| AMR Watches Ltd | Wholesale & retail | 2020 |
| Amra Holdings Ltd | Real estate | 2024 |
| Amric Group Ltd | Transport & logistics | 2021 |
| Amrose Evergreen Limited | Health & social care | 2014 |
| AMS Bakes Ltd | Hospitality | 2024 |
| AMS Civils Limited | Construction | 2018 |
| AMS Direct Ltd | Wholesale & retail | 2013 |
| AMS Investment Group Ltd | Financial services | 2023 |
| AMS Lining Limited | Real estate | 2022 |
| AMS Poonch UK Ltd | Wholesale & retail | 2024 |
| AMS Property Lettings Limited | Real estate | 2008 |
| AMS Psychology Ltd | Health & social care | 2025 |
| Amsa Mineral Limited | Wholesale & retail | 2023 |
| Amsd Properties Ltd | Real estate | 2018 |
| Amtech INT UK Ltd | Wholesale & retail | 2021 |
| Amura Trading Ltd | Wholesale & retail | 2025 |
| Amusement Procurement Limited | Wholesale & retail | 1994 |
| AMW Energy Solutions Ltd | Wholesale & retail | 2026 |
| AMW Strategic Consulting Limited | Professional & scientific | 2026 |
| AMY Briffa Ltd | Other services | 2023 |
| AMY Johnson MAN Co 2 Limited | Households | 2014 |
| Amzosam Ltd | Wholesale & retail | 2025 |
| AN Amplified Life Ltd | Extraterritorial | 2024 |
| AN Incorporations Limited | Hospitality | 2025 |
| AN Shop Limited | Wholesale & retail | 2023 |
| AN Structures Ltd | Professional & scientific | 2026 |
| AN2 Ltd | Real estate | 2026 |
| ANA Catarina Goncalves Limited | Health & social care | 2022 |
| ANA Dias Marques Gomes Limited | Health & social care | 2015 |
| ANA Magarao Ltd | Information & communication | 2021 |
| ANA Maria Magalhaes Limited | Health & social care | 2015 |
| ANA Premier Properties Limited | Real estate | 2011 |
| Anaam Trading UK Limited | Wholesale & retail | 2015 |
| Anaesthesia Medicolegal Limited | Health & social care | 2021 |
| Anafa Ltd | Wholesale & retail | 2016 |
| Anah CP Limited | Real estate | 2025 |
| Anahita Ltd | Wholesale & retail | 2021 |
| Anais Bijou Ltd | Wholesale & retail | 2025 |
| Anaitat Ltd | Wholesale & retail | 2025 |
| Anand Estates Group Ltd | Real estate | 2024 |
| Ananse Global Ltd | Professional & scientific | 2025 |
| Ananya & Nayana Limited | Households | 2021 |