| Aiden International Trading Co., Ltd | Extraterritorial | 2022 |
| Aidiation Ltd | Information & communication | 2020 |
| Aieo Ltd | Wholesale & retail | 2025 |
| Aifp Consultancy Limited | Information & communication | 2018 |
| AIG & AS Ltd | Real estate | 2025 |
| AIG BJ 2 Ltd | Hospitality | 2024 |
| Aigburth Dental Laboratory Ltd | Manufacturing | 2015 |
| Aigents.Io Ltd | Information & communication | 2025 |
| Aiglemd Limited | Public administration | 2022 |
| AIGNéIS SOLUTIONS LTD | Professional & scientific | 2024 |
| Aigo Digital Ltd | Wholesale & retail | 2014 |
| AIH Global Ltd | Professional & scientific | 2019 |
| AIH Trading Limited | Wholesale & retail | 2016 |
| Aihome Interiors Ltd | Wholesale & retail | 2021 |
| AIJ Care Ltd | Health & social care | 2019 |
| AIK NW Ltd | Hospitality | 2023 |
| Aike Investment Co., Ltd | Extraterritorial | 2017 |
| AIL Property Limited | Real estate | 2015 |
| Ailearningverse Ltd | Information & communication | 2025 |
| Aileron Media Ltd | Information & communication | 2016 |
| Ailex Limited | Information & communication | 2025 |
| AIM Apex Limited | Wholesale & retail | 2023 |
| AIM Apparel (MCR) Ltd | Wholesale & retail | 2002 |
| AIM Aviation Holdings Limited | Professional & scientific | 2013 |
| AIM Beauty Company Limited | Wholesale & retail | 2025 |
| AIM Business Group Ltd | Wholesale & retail | 2026 |
| AIM Design Services Limited | Professional & scientific | 1997 |
| AIM Edge Ltd | Professional & scientific | 2011 |
| AIM Electrical Contractors Ltd | Construction | 2017 |
| AIM Global Ventures Ltd | Wholesale & retail | 2025 |
| AIM H Investments Limited | Real estate | 2026 |
| AIM Haulage Ltd | Wholesale & retail | 2021 |
| AIM Healthy Company Limited | Wholesale & retail | 2025 |
| AIM Legal Limited | Professional & scientific | 2007 |
| AIM Plastering Ltd | Construction | 2014 |
| AIM Properties (Manchester) Limited | Real estate | 2024 |
| AIM Seamless Childrenswear Company Limited | Wholesale & retail | 2025 |
| AIM Seamless Company Limited | Manufacturing | 2024 |
| AIM Supply Ltd | Water & waste | 2024 |
| AIM Toward the Sky Ltd | Information & communication | 2026 |
| Aim&Transport Ltd | Transport & logistics | 2025 |
| AIM2 Ltd | Information & communication | 2026 |
| Aimag Limited | Real estate | 2021 |
| Aiman Abdullah Abdo Al-Mushiki for General Trading Co Ltd | Wholesale & retail | 2026 |
| Aiman Fashion Ltd | Wholesale & retail | 2016 |
| Aimans Fashions Ltd | Wholesale & retail | 2022 |
| Aimco Consulting Limited | Information & communication | 2026 |
| Aimedia Manchester Limited | Information & communication | 2025 |
| Aimeelea 99 Ltd | Administrative & support | 2025 |
| Aimen Group Ltd | Wholesale & retail | 2021 |
| Aimer Blanche Ltd | Wholesale & retail | 2024 |
| Aimii Limited | Other services | 2010 |
| Aimii Properties Limited | Real estate | 2024 |
| Aimless Ltd | Information & communication | 2022 |
| Aimlessdev Ltd | Information & communication | 2025 |
| Aims Business Associates Limited | Transport & logistics | 2014 |
| Aims Global Intellectual Property Services UK Ltd | Professional & scientific | 2022 |
| Aims Medical Limited | Health & social care | 2025 |
| Aims Petroleum Limited | Wholesale & retail | 2017 |
| Aims Real Estate Limited | Real estate | 2021 |
| Aimwright Ltd | Information & communication | 2024 |
| Ainostics Limited | Information & communication | 2018 |
| Ainscott Online Ltd | Wholesale & retail | 2024 |
| Ainscough Environmental Services Limited | Construction | 2024 |
| Ainscough Hughes Limited | Construction | 2015 |
| Ainsdale Properties Limited | Real estate | 2000 |
| Ainsley Groundscare Ltd | Administrative & support | 2026 |
| Ainsley Holdings Limited | Financial services | 2022 |
| Ainsley James Recruitment Limited | Administrative & support | 2025 |
| Ainsley Signs (Corporate) Limited | Manufacturing | 2004 |
| Ainsojameso Image Disection, Inc. Ltd | Professional & scientific | 2018 |
| Ainsworth Freehold Limited | Professional & scientific | 2013 |
| Ainsworth Project Developments Limited | Real estate | 2015 |
| Ainsworth Property Management Ltd | Administrative & support | 2001 |
| Ainsworth Surgical Supplies Limited | Wholesale & retail | 2010 |
| Ainsworth Surveying Services Limited | Professional & scientific | 1997 |
| Ainsytec Limited | Information & communication | 2022 |
| Aintis Ltd | Information & communication | 2026 |
| Aintree Roofing Services Limited | Construction | 2021 |
| Ainz Global Ltd | Wholesale & retail | 2025 |
| Aioanei Ltd | Health & social care | 2014 |
| Aion Apollo Ltd | Education | 2019 |
| Aionios Group Logistics Ltd | Transport & logistics | 2024 |
| Aioniqa Limited | Information & communication | 2025 |
| AIP Global Ltd | Information & communication | 2026 |
| AIP Wealth Management Limited | Financial services | 2016 |
| Aiphysio Ltd | Health & social care | 2023 |
| Aiprofit Limited | Information & communication | 2024 |
| Aiqual LLP | | 2024 |
| Air (UK) (Actc) Ltd | Hospitality | 2019 |
| Air (UK) Airports Ltd | Hospitality | 2019 |
| Air (UK) Arndale Ltd | Hospitality | 2022 |
| Air (UK) Gateway House Ltd | Hospitality | 2023 |
| Air (UK) HQ Ltd | Financial services | 2019 |
| Air (UK) JJ Liverpool Ltd | Hospitality | 2025 |
| Air (UK) Liverpool Ltd | Hospitality | 2019 |
| Air (UK) Ltd | Administrative & support | 2014 |
| Air (UK) Nerf Trafford Ltd | Hospitality | 2020 |
| Air (UK) Oxford RD 2 Ltd | Hospitality | 2019 |
| Air (UK) Oxford RD Ltd | Hospitality | 2019 |