| Agee Ltd | Wholesale & retail | 2026 |
| Agent Angel Travel Ltd | Administrative & support | 2026 |
| Agha Property Limited | Real estate | 2025 |
| Agharas Group PVT Ltd | Hospitality | 2025 |
| Agiazi Bros Ltd | Construction | 2023 |
| Agile Compliance Consulting Ltd | Professional & scientific | 2026 |
| Agile Staffing Ltd | Administrative & support | 2024 |
| Agileist Ltd | Professional & scientific | 2017 |
| Agiletec Ltd | Information & communication | 2017 |
| Agilinks Limited | Information & communication | 2021 |
| Agility Experts Limited | Other services | 2017 |
| Agimo Ltd | Health & social care | 2022 |
| AGM Accountancy Ltd | Professional & scientific | 2019 |
| Agni Collective Ltd | Professional & scientific | 2026 |
| Agniv Fire&Security Ltd | Administrative & support | 2025 |
| AGR Trans Ltd | Transport & logistics | 2025 |
| Agriculture Wheel Impex International Limited | Wholesale & retail | 2025 |
| Agromac Ltd | Wholesale & retail | 2007 |
| AGS Drylining Ltd | Construction | 2020 |
| AGS Holdings Group Limited | Financial services | 2025 |
| Agsess Limited | Extraterritorial | 2017 |
| Agya KOO Shipping Ltd | Transport & logistics | 2017 |
| Agyemang Group Limited | Health & social care | 2020 |
| AH 4LESS Ltd | Wholesale & retail | 2025 |
| AH Airport Transfers Limited | Transport & logistics | 2024 |
| AH Brothers Ltd | Other services | 2019 |
| AH Construction Services Ltd | Construction | 2025 |
| AH Executive Travels Ltd | Transport & logistics | 2024 |
| AH Hearing Limited | Health & social care | 2025 |
| AH Medical Services Limited | Health & social care | 2021 |
| AH Peri Peri Grill House Ltd | Hospitality | 2024 |
| AH Spare Parts Ltd | Wholesale & retail | 2024 |
| AH Vibecart Ltd | Wholesale & retail | 2026 |
| AHA & Co Ltd | Professional & scientific | 2013 |
| Ahaa Travel Services Ltd | Other services | 2025 |
| Aham Trading Limited | Other services | 2013 |
| Ahamed and Elahi Ltd | Professional & scientific | 2018 |
| Ahana Food and Wine Ltd | Wholesale & retail | 2023 |
| Ahar Limited | Hospitality | 2023 |
| Ahavah Holdings Limited | Financial services | 2025 |
| AHB Logistics Ltd | Transport & logistics | 2026 |
| Ahbos Ltd | Real estate | 2025 |
| Ahea Holdings Limited | Financial services | 2019 |
| AHF Limited | Real estate | 2023 |
| Ahfmwm Ltd | Professional & scientific | 2025 |
| AHG Rentals Limited | Real estate | 2025 |
| Ahgasengineers Ltd | Construction | 2022 |
| AHK Square Ltd | Wholesale & retail | 2025 |
| AHK Trade Ltd | Wholesale & retail | 2025 |
| Ahmed & GUL Ltd | Health & social care | 2009 |
| Ahmed Cost Consultants Ltd | Professional & scientific | 2024 |
| Ahmed Halal Meat & Grocery Ltd | Wholesale & retail | 2022 |
| Ahmed Oxford Foundation | Health & social care | 2022 |
| Ahmed Urban Developments Ltd | Real estate | 2025 |
| Ahmed Ventures & Holdings Ltd | Financial services | 2025 |
| Ahmed Zaib Limited | Transport & logistics | 2024 |
| Ahmeds Fast Food Ltd | Hospitality | 2024 |
| Ahmer Ltd | Wholesale & retail | 2025 |
| AHN Traders Ltd | Hospitality | 2025 |
| AHO Residential Ltd | Real estate | 2025 |
| AHS Accountants Ltd | Professional & scientific | 2020 |
| AHS Building Contractors Ltd | Construction | 2020 |
| Ahsamix Ltd | Wholesale & retail | 2025 |
| Ahsan Digital Solutions Ltd | Information & communication | 2024 |
| Ahtsham Guardian Force Ltd | Wholesale & retail | 2026 |
| AI Aviator Ltd | Information & communication | 2025 |
| AI Complete Ltd | Information & communication | 2025 |
| AI Consultancy (1) Ltd | Professional & scientific | 2024 |
| AI Empire Ltd | Administrative & support | 2024 |
| AI First Ltd | Information & communication | 2024 |
| AI Global Solutions Limited | Professional & scientific | 2010 |
| AI Innovation Box Limited | Professional & scientific | 2020 |
| AI Legal Consultancy Limited | Professional & scientific | 2025 |
| Ai-Sha Technologies Limited | Information & communication | 2025 |
| Ai-Transport & Logistics Ltd | Transport & logistics | 2025 |
| AI2 Consultancy Ltd | Information & communication | 2025 |
| AI2 Ltd | Construction | 2022 |
| AI4WORLD Limited | Manufacturing | 2020 |
| AIA London Limited | Real estate | 2025 |
| Aias Cosntruction Limited | Construction | 2025 |
| AIC UK Construction Ltd | Construction | 2026 |
| Aicah Investments Ltd | Real estate | 2024 |
| Aidhen Car Service Ltd | Wholesale & retail | 2021 |
| AIH Group Limited | Wholesale & retail | 2022 |
| AII Prime Investments LLP | | 2019 |
| AIK Global Retail Ltd | Wholesale & retail | 2017 |
| Aiko Homes Ltd | Construction | 2019 |
| Ailsworth Capital Ltd | Financial services | 2026 |
| Aily Ltd | Wholesale & retail | 2026 |
| AIM Allied Ltd | Real estate | 2018 |
| AIM Consulting Services Ltd | Professional & scientific | 2024 |
| AIM Investments Ltd | Real estate | 2017 |
| AIM Property & Investments Ltd | Real estate | 2026 |
| AIM Solder (UK) Limited | Manufacturing | 2014 |
| Aima Transport Ltd | Transport & logistics | 2019 |
| Aimaz Consultancy Ltd | Professional & scientific | 2019 |
| Aime Properties Ltd | Real estate | 2025 |
| AIN Services Ltd | Construction | 2024 |
| Aing Limited | Information & communication | 2026 |
| AIO Lawpartners (AIO Legal Services) Limited | Financial services | 2020 |