| Asphalt Burner Services Limited | Mining & quarrying | 2005 |
| Asphaltbau Premius Ltd | Administrative & support | 2014 |
| Aspinal Limited | Manufacturing | 2024 |
| Aspinall Property Management Consultancy Limited | Real estate | 2018 |
| Aspirants Outreach C.I.C. | Public administration | 2023 |
| Aspire & Succeed | Other services | 2008 |
| Aspire Accountants Limited | Professional & scientific | 2008 |
| Aspire Active Camps Ltd | Education | 2008 |
| Aspire Active Education Group Limited | Education | 2016 |
| Aspire Active Education Ltd | Education | 2021 |
| Aspire Aesthetics (Bucks) Ltd | Health & social care | 2019 |
| Aspire and Excel Community Interest Company | Health & social care | 2009 |
| Aspire Asset & Property Management Ltd | Real estate | 2026 |
| Aspire Career Solutions Ltd | Other services | 2025 |
| Aspire Coaching Services Ltd | Education | 2025 |
| Aspire Community Partnership Ltd | Real estate | 2026 |
| Aspire Consulting Solutions Limited | Professional & scientific | 2015 |
| Aspire Creativity | Education | 2009 |
| Aspire Cubed (UK) Limited | Construction | 2008 |
| Aspire Dance CIC | Education | 2023 |
| Aspire Designs & Prototypes Ltd | Administrative & support | 2019 |
| Aspire Drives Ltd | Administrative & support | 2023 |
| Aspire Foster Care Limited | Health & social care | 2006 |
| Aspire Hair & Beauty (Midlands) Ltd | Other services | 2020 |
| Aspire Homeware Ltd | Wholesale & retail | 2015 |
| Aspire Housing and Investments Ltd | Real estate | 2025 |
| Aspire IT Consultancy Services Ltd | Information & communication | 2023 |
| Aspire Kids Hub Ltd | Education | 2026 |
| Aspire Living Limited | Health & social care | 1992 |
| Aspire Medical Limited | Health & social care | 2009 |
| Aspire Niaga UK Ltd | Wholesale & retail | 2016 |
| Aspire Partners Limited | Professional & scientific | 2016 |
| Aspire PG Limited | Professional & scientific | 2024 |
| Aspire Play Ltd | Construction | 2025 |
| Aspire Pro-Serv Ltd | Real estate | 2019 |
| Aspire Property Services Ltd | Real estate | 2025 |
| Aspire Residence Ltd | Health & social care | 2025 |
| Aspire Sales and Lettings Birmingham Limited | Real estate | 2024 |
| Aspire Skills Limited | Education | 2017 |
| Aspire Solution 786 Ltd | Financial services | 2025 |
| Aspire Sports Trust | Arts & recreation | 2013 |
| Aspire Supported Accommodation Ltd | Health & social care | 2020 |
| Aspire Supported Living C.I.C. | Hospitality | 2014 |
| Aspire Supportive Housing C.I.C. | Hospitality | 2020 |
| Aspire TAN & Beauty Ltd | Other services | 2018 |
| Aspire Training Solutions (UK) Limited | Education | 2013 |
| Aspire UK Tax Accountants Limited | Professional & scientific | 2010 |
| Aspire Wholesale Ltd | Wholesale & retail | 2026 |
| Aspirecart Ltd | Wholesale & retail | 2024 |
| Aspires Finance Limited | Financial services | 2017 |
| Aspiring Young Minds CIC | Education | 2022 |
| Aspley Lane Booze Limited | Wholesale & retail | 2026 |
| Asporea Ltd | Wholesale & retail | 2020 |
| Aspr Limited | Transport & logistics | 2026 |
| Aspral Limited | Real estate | 2023 |
| Aspstores Ltd | Wholesale & retail | 2021 |
| Asptech IT Solutions Ltd | Information & communication | 2000 |
| Asptech Ltd | Extraterritorial | 2003 |
| ASQ Consulting Ltd | Information & communication | 2017 |
| ASQ Legal Solutions CIC | Professional & scientific | 2025 |
| Asquaredai Ltd | Information & communication | 2024 |
| Asquith 2 Limited | Real estate | 2025 |
| Asquith Homes Limited | Real estate | 2014 |
| Asquith House Limited | Real estate | 2013 |
| Asquith House Properties Limited | Real estate | 2006 |
| Asquith Properties Limited | Construction | 2016 |
| ASR Advantage Law Limited | Professional & scientific | 2010 |
| ASR Capital Holdings Ltd | Other services | 2019 |
| ASR Catering Ltd | Hospitality | 2024 |
| ASR Global Logistics Limited | Transport & logistics | 2026 |
| ASR Hirise Ltd | Hospitality | 2024 |
| ASR Homes Ltd | Construction | 2019 |
| ASR Pharma Ltd | Wholesale & retail | 2021 |
| ASR Real Estates Limited | Real estate | 2014 |
| Asraar Hair & Beauty Ltd | Other services | 2020 |
| Asraar Spa Ltd | Other services | 2025 |
| Asri Ltd | Hospitality | 2013 |
| Asroy Ltd | Construction | 2026 |
| Asroy Premium Cleaning Ltd | Administrative & support | 2025 |
| Assad Sultani Ltd | Administrative & support | 2026 |
| Assali Somali Cafe and Sweets Ltd | Hospitality | 2023 |
| Assay Corporate Finance Limited | Administrative & support | 2000 |
| Assemble YOU Limited | Education | 2021 |
| Assern Properties Limited | Financial services | 2014 |
| Assess the Risk Security FM Ltd | Financial services | 2025 |
| Assessly Ltd | Other services | 2025 |
| ASSESSMENT360 Limited | Education | 2021 |
| Assessors Direct Ltd | Other services | 2021 |
| Asset Barber Club Ltd | Other services | 2023 |
| Asset Investment Club Ltd | Real estate | 2019 |
| Asset Management Property Maintenance Limited | Professional & scientific | 1997 |
| Asset Operations Ltd | Real estate | 2025 |
| Asset Residential (Estates) Limited | Real estate | 2015 |
| Asset Residential Limited | Real estate | 2003 |
| Asset Search & Find Ltd | Administrative & support | 2009 |
| Asset Supervision Ltd | Real estate | 2024 |
| Asset Training & Consultancy Limited | Professional & scientific | 1998 |
| Asset Verification Solutions Limited | Extraterritorial | 2024 |
| Asset Watch Security Ltd | Administrative & support | 2025 |
| Assetexpert. Ltd | Professional & scientific | 2016 |