| Arukah Sanctuary | Other services | 2015 |
| Arum Care Agency Limited | Administrative & support | 2022 |
| Arun & Amar Ltd | Real estate | 2020 |
| Arun Kumar Verma Ltd | Extraterritorial | 2016 |
| Arunachala Limited | Information & communication | 2010 |
| Arundel Properties Limited | Construction | 2019 |
| Arundel Road 1961 Limited | Extraterritorial | 2014 |
| Arura Ltd | Real estate | 2023 |
| ARV Total Holdings Ltd | Financial services | 2026 |
| ARV Trading Ltd | Health & social care | 2026 |
| Arvato SCM UK Limited | Other services | 2004 |
| Arvello Business Ltd | Wholesale & retail | 2026 |
| Arvin Pizza Limited | Hospitality | 2021 |
| Arvion Holding Limited | Financial services | 2026 |
| Arvonix Services Ltd | Administrative & support | 2026 |
| Arvp Group Limited | Wholesale & retail | 2025 |
| Arwg Ltd | Wholesale & retail | 2018 |
| Arwyn Group Limited | Construction | 2023 |
| ARY Energy Limited | Other services | 2020 |
| ARY Foods Ltd | Hospitality | 2024 |
| ARY Motors Performance Limited | Wholesale & retail | 2024 |
| Arya AID Limited | Real estate | 2021 |
| Arya Associates Limited | Professional & scientific | 2016 |
| Arya Cottage Ltd | Wholesale & retail | 2020 |
| Arya Fresh Ltd | Wholesale & retail | 2021 |
| Arya House Ltd | Other services | 2016 |
| Aryaloom Limited | Wholesale & retail | 2025 |
| Aryan Khan Investments Ltd | Real estate | 2025 |
| Aryana Creations Ltd | Wholesale & retail | 2023 |
| Aryana Creations Properties Ltd | Real estate | 2026 |
| Aryana M&G Ltd | Administrative & support | 2017 |
| Aryana Post Ltd | Wholesale & retail | 2016 |
| Aryana Rice & Tea Ltd | Wholesale & retail | 2021 |
| Aryaveer Homes Ltd | Real estate | 2022 |
| Aryian’S International Ltd | Hospitality | 2026 |
| Arylop (UK) Ltd | Administrative & support | 2018 |
| Aryp C.I.C. | Education | 2012 |
| Arysa Ltd | Health & social care | 2021 |
| Aryva Properties Ltd | Real estate | 2025 |
| ARZ Bespoke Stays Ltd | Real estate | 2026 |
| ARZ N Co Limited | Wholesale & retail | 2025 |
| ARZ Property Ltd | Real estate | 2023 |
| Arzaaq Ltd | Other services | 2022 |
| Arzautomotive Ltd | Wholesale & retail | 2025 |
| Arzoyi Property Management Limited | Households | 2025 |
| Arzu Fabrics Limited | Wholesale & retail | 2022 |
| AS & Family Co Ltd | Real estate | 2023 |
| AS & NK Housing Ltd | Real estate | 2024 |
| AS & RJ Ltd | Wholesale & retail | 2025 |
| AS Associates (Midlands) Limited | Professional & scientific | 2012 |
| AS Aura Holdings Ltd | Financial services | 2025 |
| AS Bhaker Ltd | Wholesale & retail | 2025 |
| AS Brothers Online Ltd | Hospitality | 2024 |
| AS Business Ltd | Other services | 2026 |
| AS Couriers Limited | Transport & logistics | 2021 |
| AS Dream Fashion Limited | Manufacturing | 2025 |
| AS Duhra Ltd | Transport & logistics | 2017 |
| AS Engineering and Services Ltd | Construction | 2025 |
| AS Fincorp Limited | Administrative & support | 2010 |
| AS Foreign Education Consultants Limited | Education | 2011 |
| AS GAS & Heating Ltd | Construction | 2023 |
| AS Goods Limited | Wholesale & retail | 2025 |
| AS Hearing Ltd | Wholesale & retail | 2018 |
| AS Heartful Care Holdings Ltd | Financial services | 2025 |
| AS Heating and Electric Ltd | Wholesale & retail | 2022 |
| AS Housing Services Limited | Real estate | 2024 |
| AS Legal Solutions Limited | Professional & scientific | 2016 |
| AS Locums Ltd | Health & social care | 2019 |
| AS Loha Properties Ltd | Real estate | 2026 |
| AS Medics Services Ltd | Health & social care | 2016 |
| AS Mount Limited | Health & social care | 2022 |
| AS Outdoor Solutions Ltd | Administrative & support | 2025 |
| AS PHV Rentals Limited | Transport & logistics | 2024 |
| AS Projects Consulting Limited | Professional & scientific | 2016 |
| AS Properties (West Midlands) Ltd | Real estate | 2017 |
| AS Property Solution Limited | Real estate | 2017 |
| AS Property Ventures Ltd | Real estate | 2024 |
| AS Rugeley Ltd | Hospitality | 2024 |
| AS Samad Homes Ltd | Construction | 2024 |
| AS Security Systems Ltd | Construction | 2020 |
| AS Soon AS Possible Group Limited | Transport & logistics | 2015 |
| AS Surface Engineering Ltd | Professional & scientific | 2020 |
| AS Trading (Midlands) Ltd | Hospitality | 2023 |
| As-Saboor Ltd | Wholesale & retail | 2022 |
| As-Sakinah Housing Ltd | Real estate | 2025 |
| As-Salaam Travel Limited | Administrative & support | 2019 |
| As-Salaam Unity Centre Limited | Education | 2025 |
| As-Suffa Community CIC | Administrative & support | 2025 |
| As-Suffa Trust | Education | 2004 |
| AS1 Capital Ltd | Financial services | 2024 |
| AS1 Racing Ltd | Wholesale & retail | 2018 |
| ASA Construction & Development Limited | Construction | 2026 |
| ASA Diagnostics Ltd | Health & social care | 2026 |
| ASA Events Ltd | Hospitality | 2023 |
| ASA Global Services Ltd | Wholesale & retail | 2014 |
| ASA Group Holdings Ltd | Financial services | 2025 |
| ASA Property Group Ltd | Real estate | 2025 |
| ASA Technical Solutions Ltd | Administrative & support | 2017 |
| ASA Travel Limited | Transport & logistics | 2014 |
| Asaas Group Ltd | Wholesale & retail | 2016 |