| Air Screens Inflatables Ltd | Arts & recreation | 2015 |
| Airbrzee Consulting Ltd | Information & communication | 2024 |
| Airguard Envirocare Limited | Manufacturing | 2021 |
| Airopad Ltd | Information & communication | 2026 |
| Airrose Ltd | Construction | 2024 |
| Airtech Images Limited | Professional & scientific | 2017 |
| AIT Care Ltd | Health & social care | 2026 |
| Aithan Stores Ltd | Wholesale & retail | 2026 |
| Aivendro Limited | Information & communication | 2026 |
| AJ Athwal Holdings Limited | Real estate | 2026 |
| AJ Carriers Limited | Transport & logistics | 2024 |
| AJ Fitness Coaching Ltd | Arts & recreation | 2023 |
| AJ Grewal Investments Ltd | Real estate | 2022 |
| AJ Locum Ltd | Health & social care | 2024 |
| AJ Millard Holdings Limited | Financial services | 2024 |
| AJ Moves Properties Ltd | Real estate | 2026 |
| AJ Plumbing & Building Ltd | Construction | 2022 |
| AJ Property Midlands Ltd | Real estate | 2019 |
| AJ Recovery Services Ltd | Transport & logistics | 2026 |
| AJ Southall Services Limited | Construction | 2025 |
| Ajam Holdings Limited | Financial services | 2023 |
| Ajan Property Ltd | Real estate | 2025 |
| Ajay Building Services Ltd | Construction | 2025 |
| Ajay Holdings Ltd | Real estate | 2025 |
| Ajay Transport Ltd | Transport & logistics | 2024 |
| Ajayi Properties Limited | Real estate | 2025 |
| Ajaz ALI Investments Ltd | Financial services | 2023 |
| Ajaz ALI Trading Ltd | Financial services | 2023 |
| AJB Media Limited | Professional & scientific | 2011 |
| AJB Painters Ltd | Construction | 2026 |
| AJB Rail Product Services Limited | Manufacturing | 2016 |
| Ajbr Ltd | Manufacturing | 2017 |
| AJC Corp Ltd | Information & communication | 2020 |
| AJD Access Limited | Manufacturing | 2014 |
| AJD Motor Services Limited | Wholesale & retail | 2004 |
| AJG QS Services Limited | Administrative & support | 2018 |
| AJH Automation Ltd | Professional & scientific | 2013 |
| AJI Financial Planning Limited | Professional & scientific | 2018 |
| Ajit Builders Services Ltd | Construction | 2020 |
| Ajja Group Limited | Financial services | 2021 |
| AJL Carpentry Services Limited | Construction | 2019 |
| AJM & Co UK Limited | Manufacturing | 2019 |
| AJM Engineering Contract Services Limited | Professional & scientific | 2017 |
| AJM Fire Safety Limited | Public administration | 2019 |
| AJM Living Limited | Construction | 2018 |
| AJM Planning Associates Limited | Professional & scientific | 2005 |
| Ajooni Ltd | Administrative & support | 2015 |
| AJS Commercial Ltd | Professional & scientific | 2020 |
| AJS Community Support Care Services Ltd | Health & social care | 2023 |
| Ajsp Lets Limited | Real estate | 2026 |
| AJT Plastering Ltd | Construction | 2022 |
| AJT Property Group Limited | Real estate | 2022 |
| AJT Universal Ltd | Wholesale & retail | 2025 |
| Ajtattoouk Ltd | Other services | 2023 |
| AJW Property & Landscaping Ltd | Real estate | 2025 |
| AJW Steel Services Limited | Construction | 2006 |
| AK Cars Sales Ltd | Wholesale & retail | 2024 |
| AK Civil Services Ltd | Construction | 2020 |
| AK Edge Ltd | Wholesale & retail | 2025 |
| AK Exclusive Motors Ltd | Wholesale & retail | 2025 |
| AK Fashion Wear Limited | Wholesale & retail | 2021 |
| AK Food and Grill Ltd | Hospitality | 2026 |
| AK Group Holdings Limited | Financial services | 2022 |
| AK Halal Foods Ltd | Wholesale & retail | 2025 |
| AK Holdings & Investments Ltd | Real estate | 2021 |
| AK Photography Ltd | Information & communication | 2025 |
| AK Probuild Solutions Ltd | Construction | 2024 |
| AK Sales Management Ltd | Wholesale & retail | 2026 |
| AK Trade Frames Limited | Extraterritorial | 2026 |
| AK Valeting Limited | Wholesale & retail | 2007 |
| AK Windows & Doors Limited | Manufacturing | 2015 |
| AK24CARE Limited | Health & social care | 2022 |
| AK4 Investments Limited | Real estate | 2025 |
| AKA Legal Limited | Professional & scientific | 2017 |
| Akaal Limited | Health & social care | 2007 |
| Akaal Sahai Multi-Trade Ltd | Construction | 2024 |
| Akaal Store Limited | Wholesale & retail | 2024 |
| Akanji Ltd | Health & social care | 2019 |
| Akash Constructions Limited | Construction | 2026 |
| Akashvashisht Ltd | Construction | 2025 |
| Akaurn Development Ltd | Construction | 2024 |
| Akaurn Homes Ltd | Financial services | 2024 |
| AKC Plumbing and Heating Limited | Construction | 2024 |
| Akem LEO Kiara Properties Ltd | Real estate | 2025 |
| Akeneagle Ltd | Manufacturing | 2025 |
| AKH Global Ltd | Wholesale & retail | 2026 |
| Akhira Executive Services Ltd | Transport & logistics | 2024 |
| Akhoury Research Partners Limited | Real estate | 2026 |
| Akhtar Xpress Ltd | Hospitality | 2020 |
| Akili Labs Ltd | Information & communication | 2018 |
| Akinlade Limited | Health & social care | 2013 |
| Akio Property Solutions Ltd | Professional & scientific | 2023 |
| Aklass Officials Ltd | Manufacturing | 2024 |
| AKM Driveways Ltd | Construction | 2017 |
| AKM Plumbing and Heating Limited | Construction | 2022 |
| AKR Supply Ltd | Wholesale & retail | 2025 |
| AKR Transport Limited | Transport & logistics | 2016 |
| AKS & Sons Logistics Ltd | Administrative & support | 2017 |
| AKU Logistics Ltd | Transport & logistics | 2016 |
| AKW TM Ltd | Construction | 2022 |