| Aishwarya Limited | Hospitality | 2017 |
| Aisodiso Ltd | Other services | 2025 |
| Aisymmetrix Ltd | Professional & scientific | 2018 |
| AIT Provider Limited | Information & communication | 2018 |
| AIT TK Ltd | Wholesale & retail | 2024 |
| Aitan Estates Limited | Real estate | 2018 |
| Aitch Interiors Limited | Wholesale & retail | 2014 |
| Aius Traders Ltd | Wholesale & retail | 2026 |
| Aivantage Ltd | Information & communication | 2019 |
| Aivaraslag Ltd | Extraterritorial | 2025 |
| Aivish Group Ltd | Hospitality | 2026 |
| Aivow Limited | Wholesale & retail | 2025 |
| Aix-Trading Limited | Administrative & support | 2014 |
| Aiyla Investments Ltd | Construction | 2022 |
| Aiyoupu (Australia) Crop Protect Ltd | Extraterritorial | 2020 |
| AJ Business Consulting Ltd | Professional & scientific | 2023 |
| AJ Buytake Ltd | Wholesale & retail | 2024 |
| AJ Chez Amina Ltd | Other services | 2025 |
| AJ Commercial (Cardiff) Ltd | Real estate | 2025 |
| AJ Construction (Cardiff) Ltd | Construction | 2024 |
| AJ Development Plus Limited | Construction | 2021 |
| AJ Equity Partners Ltd | Financial services | 2025 |
| AJ Finance & Logistics Ltd | Financial services | 2019 |
| AJ Mills Carpentry Limited | Construction | 2017 |
| AJ Multi Services Ltd | Wholesale & retail | 2017 |
| AJ Powell Limited | Real estate | 2023 |
| AJ Property (Cardiff) Ltd | Real estate | 2024 |
| AJ Quinton (Holdings) Limited | Financial services | 2024 |
| AJ Reformer Limited | Arts & recreation | 2025 |
| AJ Services PVT Ltd | Real estate | 2025 |
| AJ Shikder International Trading Limited | Manufacturing | 2025 |
| AJ Smith Holdings Limited | Construction | 2021 |
| AJ Studio Build Ltd | Information & communication | 2023 |
| AJ Tech Solutions Ltd | Information & communication | 2022 |
| AJ Traders Ltd | Extraterritorial | 2017 |
| Aj's Mobile Catering Limited | Hospitality | 2017 |
| AJ3 Consult Ltd | Construction | 2017 |
| Ajahuk Ltd | Wholesale & retail | 2017 |
| Ajak Scaffolding Limited | Construction | 2014 |
| Ajalal Limited | Hospitality | 2022 |
| Ajaws Smiles Limited | Extraterritorial | 2024 |
| AJB Broadcast Limited | Information & communication | 2021 |
| AJB Medics Limited | Health & social care | 2018 |
| AJB Partners Ltd | Real estate | 2020 |
| AJB Restructuring and Insolvency Limited | Professional & scientific | 2018 |
| AJC Contractors Ltd | Construction | 2018 |
| AJC Hereford Limited | Health & social care | 2006 |
| AJCARSLONDON1 Limited | Wholesale & retail | 2025 |
| Ajcarslondonltd Ltd | Wholesale & retail | 2024 |
| Ajch Limited | Professional & scientific | 2010 |
| AJD Land Limited | Real estate | 2023 |
| AJD Materiaux Ltd | Wholesale & retail | 2025 |
| AJD Property Consultants Limited | Real estate | 2013 |
| AJD Resourcing Ltd | Administrative & support | 2014 |
| AJE Hair Ltd | Other services | 2017 |
| AJE Hospitality Ltd | Hospitality | 2025 |
| Ajeless Homes Ltd | Real estate | 2023 |
| Ajensen Ltd | Administrative & support | 2014 |
| AJF BMS Ltd | Professional & scientific | 2014 |
| AJG Financial Solutions Limited | Financial services | 2021 |
| AJH Property Services Ltd | Construction | 2018 |
| AJJ Ward (Northwest) Limited | Other services | 2018 |
| AJK Consult Limited | Professional & scientific | 2013 |
| AJL Construction Ltd | Construction | 2019 |
| AJL Rentals Limited | Real estate | 2016 |
| AJL Security & Cleaning Services Ltd | Administrative & support | 2024 |
| AJM Financial Services Limited | Professional & scientific | 2010 |
| AJN Investments Limited | Construction | 2002 |
| AJO Cuisine Limited | Hospitality | 2014 |
| AJP Family Limited | Professional & scientific | 2018 |
| AJP Property Management Ltd | Administrative & support | 2014 |
| Ajprotection Ltd | Administrative & support | 2025 |
| AJR Construction Management Limited | Professional & scientific | 2015 |
| AJS Barbers Ltd | Other services | 2022 |
| AJS Construction South Wales Limited | Construction | 2026 |
| AJS Property Holdings Ltd | Real estate | 2023 |
| Ajshm Ltd | Wholesale & retail | 2018 |
| Ajuda Limited | Health & social care | 2009 |
| Ajuda Property Management Ltd | Households | 2019 |
| Ajudiya Chirag Ltd | Wholesale & retail | 2025 |
| Ajumobi Trading Co. Ltd | Wholesale & retail | 2024 |
| Ajvs Export Ltd | Wholesale & retail | 2011 |
| AJW Construction (Wales) Limited | Construction | 2013 |
| AJW Property Consulting Ltd | Real estate | 2019 |
| AJW Racing Services Limited | Arts & recreation | 2019 |
| AJW Radiology Ltd | Health & social care | 2022 |
| Ajwa Supermarket Ltd | Wholesale & retail | 2023 |
| Ajwelsh Electrical Limited | Construction | 2016 |
| AK and EJ LEE Limited | Health & social care | 2021 |
| AK Charcoal Ltd | Wholesale & retail | 2018 |
| AK Commercial Group Limited | Financial services | 2024 |
| AK Deals World Ltd | Wholesale & retail | 2025 |
| AK Eco Energy Ltd | Construction | 2020 |
| AK Enterprise (GB) Limited | Professional & scientific | 2013 |
| AK Global Store Ltd | Wholesale & retail | 2026 |
| AK Goodman Ltd | Wholesale & retail | 2026 |
| AK Ideas Limited | Administrative & support | 2012 |
| AK Millat Limited | Real estate | 2026 |
| AK Serviced Apartments Ltd | Construction | 2023 |
| AK Supermart Ltd | Wholesale & retail | 2025 |