| Ashworth Commercial Cleaning Ltd | Administrative & support | 2026 |
| Ashworth House (Burnley) RTM Company Limited | Households | 2022 |
| ASI Health Ltd | Health & social care | 2019 |
| Asia Global Linens Limited | Wholesale & retail | 2025 |
| Asia Grop Limited | Administrative & support | 2011 |
| Asia Traders Limited | Wholesale & retail | 2020 |
| Asian Elite Uk.Com Limited | Administrative & support | 2017 |
| Asiatiger Limited | Administrative & support | 2017 |
| Asief Limited | Information & communication | 2026 |
| Asili Harvest Ltd | Wholesale & retail | 2026 |
| Asim Bhatti Ltd | Wholesale & retail | 2013 |
| Asim Khalil Holdings Ltd | Health & social care | 2019 |
| Asim Khalil Ltd | Health & social care | 2019 |
| Asimetrik Limited | Information & communication | 2023 |
| Asimworks Ltd | Professional & scientific | 2018 |
| Asiya Property Group Ltd | Real estate | 2026 |
| Asjk Empire 2 Limited | Real estate | 2018 |
| Asjk Empire Ltd | Real estate | 2013 |
| ASK Gloria AI Enterprises Ltd | Information & communication | 2025 |
| ASK Gloria AI Ltd | Information & communication | 2024 |
| ASK Harriette Limited | Education | 2018 |
| ASK Management Services Ltd | Public administration | 2017 |
| ASK the Accountant Ltd | Information & communication | 2023 |
| ASK4 Property Ltd | Real estate | 2017 |
| Askey Contract Services Limited | Professional & scientific | 2015 |
| Askham Ltd | Real estate | 2009 |
| Askit Geeks Ltd | Wholesale & retail | 2021 |
| Asktarah Limited | Professional & scientific | 2021 |
| Askverity Ltd | Health & social care | 2026 |
| Askwith Services Limited | Professional & scientific | 1988 |
| ASL Commercial Roofing Ltd | Construction | 2023 |
| ASL Food Ltd | Hospitality | 2025 |
| Aslam 76 Investments Ltd | Real estate | 2020 |
| Aslat Property Developments Limited | Construction | 2002 |
| Aslih Ltd | Wholesale & retail | 2024 |
| Aslihan Traders Ltd | Administrative & support | 2025 |
| ASM Recruitment Services Ltd | Administrative & support | 2018 |
| ASM1 Enterprises Limited | Other services | 2017 |
| Asmara Cleaning Services Ltd | Administrative & support | 2024 |
| Asmara Property Limited | Real estate | 2025 |
| Asmat Properties Ltd | Real estate | 2025 |
| Asme Services Limited | Administrative & support | 2015 |
| Asmi Testing Solutions Limited | Administrative & support | 2011 |
| ASN Healthcare Staffing Ltd | Health & social care | 2023 |
| ASN Holdco Ltd | Financial services | 2026 |
| Asnanak Limited | Professional & scientific | 2024 |
| Asomaning & Co - Immigration Lawyers Ltd | Professional & scientific | 2025 |
| Asond UK Limited | Professional & scientific | 2019 |
| Aspcold Limited | Water & waste | 2023 |
| Aspcold Manufacturing Limited | Manufacturing | 2024 |
| Aspect 14 Management Limited | Households | 2003 |
| Aspect 360 Services Ltd | Administrative & support | 2023 |
| Aspect Building Solutions Limited | Construction | 2007 |
| Aspect CSV Limited | Wholesale & retail | 2012 |
| Aspectus Investments Ltd | Real estate | 2022 |
| Aspen Hill Healthcare Limited | Health & social care | 2018 |
| Aspen Hill Healthcare Property Limited | Real estate | 2018 |
| Aspen NAZ UK Ltd | Wholesale & retail | 2023 |
| Aspera Aurora Ltd | Wholesale & retail | 2024 |
| Aspin - Hall Developments Limited | Real estate | 2018 |
| Aspin Park Limited | Professional & scientific | 2023 |
| Aspin-Hall Investments Ltd | Real estate | 2019 |
| Aspinall Associates Ltd | Administrative & support | 2017 |
| Aspinall Commercial Limited | Real estate | 2022 |
| Aspinall Group Limited | Financial services | 2019 |
| Aspinall Holdings Ltd | Real estate | 2014 |
| Aspinall Land & Projects Limited | Real estate | 2020 |
| Aspinall Verdi Limited | Construction | 2009 |
| Aspire & Achieve Limited | Education | 2010 |
| Aspire (LIA) Ltd | Education | 2018 |
| Aspire AP Education CIC | Education | 2023 |
| Aspire Birmingham Limited | Extraterritorial | 2008 |
| Aspire Capital Ventures Ltd | Financial services | 2025 |
| Aspire Education Ventures Ltd | Education | 2024 |
| Aspire Equity Release Limited | Financial services | 2022 |
| Aspire Estates Trading Ltd | Real estate | 2015 |
| Aspire Homebuyers Ltd | Real estate | 2024 |
| Aspire Leeds Limited | Hospitality | 2008 |
| Aspire London Limited | Extraterritorial | 2008 |
| Aspire Manchester Limited | Extraterritorial | 2008 |
| Aspire Marketing Group Ltd | Professional & scientific | 2024 |
| Aspire Mattresses Limited | Manufacturing | 2018 |
| Aspire Nexus Ltd | Extraterritorial | 2024 |
| Aspire Office Furniture Limited | Wholesale & retail | 2024 |
| Aspire Portfolio Ltd | Real estate | 2024 |
| Aspire Properties Estate Agent Ltd | Real estate | 2020 |
| Aspire Property Group (SPV) Block 14 Ellenborough Ltd | Real estate | 2025 |
| Aspire Property Group (SPV) Block 45 Cross Lane Ltd | Real estate | 2025 |
| Aspire Property Group (SPV) Block 49 Upper Basinghall Ltd | Real estate | 2025 |
| Aspire Property Law LLP | | 2021 |
| Aspire Recruiters Ltd | Administrative & support | 2019 |
| Aspire Renovate Ltd | Construction | 2024 |
| Aspire Resolutions Limited | Information & communication | 2012 |
| Aspire Services (Leeds) Ltd | Health & social care | 2015 |
| Aspire Sourcing Ltd | Real estate | 2026 |
| Aspire Trading House Limited | Real estate | 2010 |
| Aspiring Communities | Health & social care | 2010 |
| Aspiring Digital Solutions Limited | Information & communication | 2018 |
| Asplenandco Ltd | Professional & scientific | 2018 |
| Aspora Youth Football Initiative CIC | Education | 2025 |