| ASD Services Ltd | Transport & logistics | 2018 |
| ASE Consultancy Limited | Wholesale & retail | 2024 |
| ASE G Properties Limited | Real estate | 2025 |
| ASE Haulage Ltd | Transport & logistics | 2022 |
| Asees Assets Ltd | Real estate | 2026 |
| ASF & Partners Ltd | Information & communication | 2023 |
| ASF Autos Limited | Wholesale & retail | 2023 |
| ASF Property Solutions Ltd | Real estate | 2024 |
| Asfk UK Limited | Information & communication | 2023 |
| ASG Capital Investments Limited | Real estate | 2026 |
| ASG Fast Ltd | Transport & logistics | 2016 |
| ASG Marketing Limited | Administrative & support | 2022 |
| ASG Property & Investments Ltd | Real estate | 2019 |
| Asghar Holdings Limited | Real estate | 2020 |
| ASH & Q Limited | Information & communication | 2015 |
| ASH and ASH Technologies Ltd | Information & communication | 2016 |
| ASH Construction and Property Management Limited | Construction | 2012 |
| ASH Cottage Ltd | Hospitality | 2024 |
| ASH Ferns Services Ltd | Professional & scientific | 2024 |
| ASH Sega Ltd | Wholesale & retail | 2025 |
| ASH Soft Solutions Ltd | Information & communication | 2013 |
| Ashanti Care Limited | Administrative & support | 2023 |
| Ashazsoft Limited | Information & communication | 2025 |
| Ashbal Ltd | Wholesale & retail | 2022 |
| Ashbeck Homes Ltd | Health & social care | 2020 |
| Ashbourne Care Limited | Health & social care | 2020 |
| Ashburns Transport Ltd | Transport & logistics | 2019 |
| Ashco Investments Limited | Wholesale & retail | 2021 |
| Ashcroft Tower Limited | Construction | 1991 |
| Ashfi Property Ltd | Real estate | 2024 |
| Ashford Kitchens and Interiors Limited | Wholesale & retail | 2007 |
| Ashkam Ltd | Construction | 2026 |
| Ashlea Court Care Home Limited | Health & social care | 2023 |
| Ashleena Ltd | Wholesale & retail | 2025 |
| Ashley Park Capital Ltd | Administrative & support | 2013 |
| Ashlon Services Ltd | Professional & scientific | 2021 |
| Ashmont Solicitors Ltd | Professional & scientific | 2026 |
| Ashoorpaastor Ltd | Wholesale & retail | 2024 |
| Ashpharma Limited | Professional & scientific | 2015 |
| Ashrecruiters Ltd | Administrative & support | 2025 |
| Ashridge Court (Bexhill) Limited | Administrative & support | 2010 |
| Ashridge Court Ltd | Health & social care | 2000 |
| Ashton Tate Properties Ltd | Households | 2019 |
| Ashutecuk Ltd | Information & communication | 2024 |
| ASI Property Services Ltd | Households | 2025 |
| Asian Cuisine Caterings Limited | Hospitality | 2025 |
| Asian Foodco Ltd | Wholesale & retail | 2025 |
| Asian Star Community Radio Limited | Information & communication | 2004 |
| Asian Star Digital Radio Limited | Information & communication | 2015 |
| Asianhandbook Ltd | Information & communication | 2024 |
| Asibey Services Ltd | Wholesale & retail | 2022 |
| Asim Travel & Tours Limited | Wholesale & retail | 2025 |
| Asingh Concrete and Construction Ltd | Construction | 2024 |
| Asipro Ltd | Professional & scientific | 2019 |
| ASJ Households Ltd | Real estate | 2022 |
| ASJ Realty Ltd | Real estate | 2025 |
| ASK Building Services Limited | Construction | 2011 |
| ASK Devi Properties Ltd | Real estate | 2021 |
| ASK Performance Ltd | Wholesale & retail | 2019 |
| ASK Services (UK) Ltd | Construction | 2003 |
| Ask-N Build Ltd | Construction | 2026 |
| Askl Ltd | Wholesale & retail | 2023 |
| Aslam Motors Limited | Wholesale & retail | 2021 |
| Asle Imperative Solutions Limited | Construction | 2025 |
| Asley Holdings Limited | Financial services | 2024 |
| ASM Fast Food Management Limited | Hospitality | 2024 |
| ASM Security Solutions Limited | Administrative & support | 2020 |
| Asm-Nova Ltd | Information & communication | 2025 |
| Asmat & Co Limited | Professional & scientific | 2013 |
| Asmat Accountancy Services Limited | Professional & scientific | 2012 |
| Asmats Assets Ltd | Real estate | 2025 |
| Asme Properties Ltd | Real estate | 2021 |
| Asmit Cloud Solutions Limited | Information & communication | 2020 |
| ASN Haulage Ltd | Transport & logistics | 2025 |
| Aspar Ltd | Professional & scientific | 2000 |
| Aspect Care Ltd | Health & social care | 2012 |
| Aspen Commerce Ltd | Wholesale & retail | 2024 |
| Aspen Court Care Limited | Health & social care | 2020 |
| Aspirant Limited | Professional & scientific | 2011 |
| Aspire Autos Ltd | Wholesale & retail | 2024 |
| Aspire Consultancy and Venture Ltd | Professional & scientific | 2014 |
| Aspire Food and Drinks Ltd | Wholesale & retail | 2021 |
| Aspire PD Limited | Real estate | 2022 |
| Aspire Properties Management Ltd | Real estate | 2020 |
| Aspire Study Abroad Limited | Education | 2025 |
| Aspirehire Solutions Ltd | Administrative & support | 2018 |
| Asprion Limited | Wholesale & retail | 1998 |
| Asquare IT Solutions Limited | Information & communication | 2011 |
| Asquare Tech Ltd | Wholesale & retail | 2025 |
| ASR Motors Ltd | Wholesale & retail | 2026 |
| ASS Freight Limited | Transport & logistics | 2025 |
| Assad Solutions Limited | Information & communication | 2014 |
| Assembly of GOD | Health & social care | 2025 |
| Asset Bricks Block Management Ltd | Real estate | 2020 |
| Asset Hobmoor LLP | | 2017 |
| Asset India Limited | Construction | 2010 |
| Asset Infotech Limited | Information & communication | 2012 |
| Asset Ripley Block a Ltd | Real estate | 2025 |
| Asset Ripley Block B Ltd | Real estate | 2025 |
| Asset Sense Limited | Real estate | 2023 |