| ASK Realty Limited | Extraterritorial | 2021 |
| ASK Recoveries Ltd | Transport & logistics | 2025 |
| ASK Retrofit-Uk Limited | Professional & scientific | 2021 |
| ASK Shiraz Limited | Real estate | 2022 |
| ASK Tax Limited | Professional & scientific | 2023 |
| ASK the Specialist Limited | Professional & scientific | 2022 |
| ASK Training Solutions Limited | Education | 2022 |
| Aska Business Services Ltd | Professional & scientific | 2013 |
| Askar Interiors Ltd | Manufacturing | 2025 |
| Askari Group Ltd | Administrative & support | 2021 |
| Askari Management Ltd | Administrative & support | 2021 |
| Askari Pharma Limited | Wholesale & retail | 2019 |
| Askari Reworks Limited | Manufacturing | 2025 |
| Askc Developments Ltd | Real estate | 2019 |
| Askecology Ltd | Real estate | 2024 |
| Askh Limited | Information & communication | 2023 |
| Aski Automation Limited | Professional & scientific | 2014 |
| Askl Sons Ltd | Real estate | 2018 |
| Asklepian Consulting Limited | Health & social care | 2013 |
| Askm Medical Limited | Health & social care | 2014 |
| Askn Ltd | Education | 2013 |
| Asko Services Ltd | Construction | 2025 |
| Askpyramid Ltd | Information & communication | 2024 |
| Askvn Holdings Ltd | Real estate | 2018 |
| ASL Electrical Limited | Construction | 2004 |
| Aslam & Sons Investments Limited | Real estate | 2025 |
| Aslam & Sons Limited | Manufacturing | 2024 |
| Aslam Dynamic Solutions Limited | Administrative & support | 2025 |
| Aslam Ecomm Ltd | Wholesale & retail | 2025 |
| Aslam Holdings Ltd | Other services | 2020 |
| Aslam Locum Limited | Wholesale & retail | 2024 |
| Aslam Services Ltd | Health & social care | 2017 |
| Aslam’S Driving School Limited | Education | 2025 |
| Aslan G Limited | Wholesale & retail | 2014 |
| Asli Cars Limited | Transport & logistics | 2024 |
| Asli International | Administrative & support | 2010 |
| Asli Roti Junction Ltd | Hospitality | 2025 |
| ASM Extensions and Plastering Limited | Manufacturing | 2025 |
| ASM Group Ltd | Real estate | 2020 |
| ASM Immigration Services Ltd | Professional & scientific | 2020 |
| ASM R&D Ltd | Professional & scientific | 2025 |
| ASM Tuning UK Ltd | Manufacturing | 2023 |
| Asma Mpharm Ltd | Health & social care | 2023 |
| Asma TAJ Ltd | Wholesale & retail | 2025 |
| Asmaak Prop Ltd | Real estate | 2019 |
| Asmar Capital Limited | Real estate | 2019 |
| Asmar Properties Limited | Real estate | 2019 |
| Asmara’S Hair & Beauty Ltd | Other services | 2023 |
| Asmarino Cafe Ltd | Hospitality | 2025 |
| Asmarino Poundwise Limited | Wholesale & retail | 2025 |
| Asmas Technology Ltd | Wholesale & retail | 2023 |
| Asmat & Co. Midlands Ltd | Professional & scientific | 2025 |
| Asma’S Eyecare Ltd | Health & social care | 2024 |
| Asmd Holding Limited | Real estate | 2024 |
| Asmerom Coffee Shop Limited | Hospitality | 2023 |
| Asmh Ltd | Administrative & support | 2022 |
| Asmie Ltd | Health & social care | 2020 |
| Asmrme Group Ltd | Other services | 2024 |
| Asmvsm Associates Ltd | Professional & scientific | 2025 |
| ASN Health Limited | Health & social care | 2017 |
| ASN Imports Ltd | Wholesale & retail | 2008 |
| ASN Rental Car Ltd | Administrative & support | 2026 |
| Asnan Limited | Health & social care | 2026 |
| Asneths Diner Caribbean Palmz Ltd | Hospitality | 2013 |
| Asnezz Ltd | Manufacturing | 2024 |
| Asnh Investments Limited | Real estate | 2025 |
| Asnow Limited | Transport & logistics | 2018 |
| ASO Facilities Management Ltd | Administrative & support | 2023 |
| ASO Holdings Limited | Financial services | 2018 |
| Asociation of Honorable Sudanese Abroad Ltd | Professional & scientific | 2025 |
| Asoke Limited | Wholesale & retail | 2026 |
| Asos Auto Parts Ltd | Manufacturing | 2022 |
| ASP Builds Ltd | Construction | 2024 |
| ASP Healthcare Ltd | Health & social care | 2025 |
| ASP Wholesale Limited | Other services | 2025 |
| Aspa Housing Ltd | Administrative & support | 2021 |
| Aspa Property Limited | Real estate | 2025 |
| Aspct Studio Ltd | Professional & scientific | 2026 |
| Aspect Community Support C.I.C. | Hospitality | 2020 |
| Aspect Holding Ltd | Financial services | 2019 |
| Aspect Housing and Support Limited | Health & social care | 2021 |
| Aspect Housing Investments Ltd | Real estate | 2021 |
| Aspect Housing Ltd | Health & social care | 2011 |
| Aspect Housing Norwich Ltd | Real estate | 2020 |
| Aspect Law Limited | Professional & scientific | 2006 |
| Aspect Supported Living Limited | Health & social care | 2020 |
| Aspects Care Homes Ltd | Real estate | 2012 |
| Aspects Care Limited | Health & social care | 2004 |
| Aspects Care Properties (UK) Limited | Real estate | 2005 |
| Aspects Real Estate Ltd | Real estate | 2000 |
| Aspen Court Solicitors Limited | Professional & scientific | 2006 |
| Aspen Flora Limited | Wholesale & retail | 2022 |
| Aspen House Management Company Limited | Real estate | 2022 |
| Aspen Motor Trade Limited | Wholesale & retail | 2023 |
| Aspen Rise Limited | Health & social care | 2025 |
| Aspen Tower Nicol Propco (Chocolate Works) Limited | Health & social care | 2014 |
| Aspen Tower Nicol Propco (the Grange) Limited | Health & social care | 2012 |
| Aspenden Holdings Limited | Financial services | 2023 |
| Aspenhurst Limited | Financial services | 2023 |
| Asperger's Heroes CIC | Health & social care | 2018 |