| Ascend Recruitment Services Limited | Other services | 2025 |
| Ascend Residency Ltd | Real estate | 2026 |
| Ascend Surveyors Ltd | Professional & scientific | 2025 |
| Ascenda Consulting Ltd | Professional & scientific | 2025 |
| Ascendancy Fitness Ltd | Arts & recreation | 2016 |
| Ascendancy Property Investments Limited | Real estate | 2019 |
| Ascender Fund Partners (UK) Limited | Financial services | 2009 |
| Ascendia Group Limited | Information & communication | 2024 |
| Ascendr Solutions Ltd | Information & communication | 2025 |
| Ascension Logistics Ltd | Transport & logistics | 2022 |
| Ascension Peptides Ltd | Professional & scientific | 2026 |
| Ascenso Accounting Ltd | Professional & scientific | 2026 |
| Ascent (Blackpool) Limited | Wholesale & retail | 2022 |
| Ascent (Chandlers Ford) Limited | Health & social care | 2017 |
| Ascent (Clowne) Limited | Wholesale & retail | 2022 |
| Ascent (Coalville) Ltd | Wholesale & retail | 2023 |
| Ascent (Congleton) Limited | Wholesale & retail | 2023 |
| Ascent (Coulby Newham) Limited | Wholesale & retail | 2022 |
| Ascent (Elburton) Limited | Wholesale & retail | 2017 |
| Ascent (Holme Hall) Limited | Wholesale & retail | 2023 |
| Ascent (Leek) Limited | Wholesale & retail | 2022 |
| Ascent (Mansfield) Limited | Wholesale & retail | 2022 |
| Ascent (Newcastle) Limited | Wholesale & retail | 2022 |
| Ascent (Sherwood) Limited | Wholesale & retail | 2022 |
| Ascent (South East) Limited | Wholesale & retail | 2018 |
| Ascent (Swindon) Limited | Wholesale & retail | 2022 |
| Ascent (Wollaton) Limited | Wholesale & retail | 2022 |
| Ascent Biggleswade Ltd | Wholesale & retail | 2024 |
| Ascent Corporate Ventures Limited | Professional & scientific | 2020 |
| Ascent Crich Ltd | Wholesale & retail | 2024 |
| Ascent Financial Advisory Ltd | Professional & scientific | 2026 |
| Ascent Funding Limited | Financial services | 2011 |
| Ascent Healthcare Limited | Wholesale & retail | 2016 |
| Ascent Holding Group Limited | Financial services | 2017 |
| Ascent People Ltd | Administrative & support | 2010 |
| Ascent Performance Group Limited | Administrative & support | 2008 |
| Ascent Spondon Ltd | Professional & scientific | 2018 |
| Ascent Ventures Limited | Financial services | 2014 |
| Ascent Wellfield Group 2 Ltd | Health & social care | 2023 |
| Ascent Wellfield Group Ltd | Financial services | 2023 |
| Ascent Wellfield Management Limited | Professional & scientific | 2024 |
| Ascentia Partners Ltd | Administrative & support | 2023 |
| Ascentric Consulting Ltd | Information & communication | 2025 |
| Asclepius Optimisation Ltd | Health & social care | 2026 |
| Asco Nominees Limited | Administrative & support | 1978 |
| Ascom Consulting Limited | Information & communication | 2009 |
| Ascot Enterprizes Limited | Wholesale & retail | 2017 |
| Ascot Medical Limited | Health & social care | 2014 |
| Ascot Property Estates LLP | | 2010 |
| Ascot Services UK Limited | Administrative & support | 2003 |
| Ascot Utilities Limited | Construction | 2015 |
| Ascot Wren Ltd | Real estate | 2024 |
| Ascott Broking Group Limited | Financial services | 2025 |
| Ascott Life and Health Limited | Financial services | 2025 |
| Ascroft Asset Management LLP | | 2020 |
| ASD Contracting Limited | Construction | 2023 |
| ASD Manchester Ltd | Manufacturing | 2012 |
| ASD Property Group Ltd | Real estate | 2020 |
| ASD Valet UK Limited | Administrative & support | 2021 |
| Asda Pension Plan Trustees Limited | Financial services | 2018 |
| Asdealz Limited | Wholesale & retail | 2022 |
| ASE Global Holdings Ltd | Wholesale & retail | 2026 |
| ASE2RESQ Limited | Transport & logistics | 2026 |
| Asec Security Systems Ltd | Construction | 2011 |
| Ased Logistics Ltd | Wholesale & retail | 2025 |
| Aseel Ltd | Hospitality | 2019 |
| Asembl Homes Limited | Construction | 2025 |
| Asenami Bakery Limited | Hospitality | 2022 |
| Asertis Ltd | Administrative & support | 2018 |
| Asertis SPV 1 Ltd | Administrative & support | 2021 |
| Asertis SPV 2 Ltd | Administrative & support | 2021 |
| Asertis SPV 3 Ltd | Administrative & support | 2021 |
| Asertis SPV 4 Ltd | Administrative & support | 2021 |
| Asfa & Aima Ltd | Wholesale & retail | 2022 |
| Asff Holdco Ltd | Hospitality | 2025 |
| Asff Trading Ltd | Hospitality | 2025 |
| Asfour Brothers Trading Company Ltd | Construction | 2025 |
| Asfour for Services Ltd | Other services | 2024 |
| ASG Aerospace Limited | Manufacturing | 2019 |
| ASG Electrical North West Limited | Construction | 2022 |
| ASG Global Solutions Limited | Administrative & support | 2025 |
| ASG Haven Ltd | Wholesale & retail | 2024 |
| ASG Industrial Holdings Limited | Professional & scientific | 2019 |
| ASG Investment 10 Limited | Financial services | 2020 |
| ASG Investment 11 Limited | Financial services | 2023 |
| ASG Investment 12 Limited | Financial services | 2023 |
| ASG Investment 4 Limited | Financial services | 2016 |
| ASG Investment 7 Limited | Financial services | 2018 |
| ASG Investment 9 Limited | Financial services | 2018 |
| ASG Investments 1 Limited | Professional & scientific | 2015 |
| ASG Investments 2 Limited | Professional & scientific | 2016 |
| ASG Investments 3 Limited | Professional & scientific | 2016 |
| ASG Investments 5 Limited | Financial services | 2016 |
| ASG Properties (Manchester) Ltd | Households | 2013 |
| ASG Tooling Limited | Manufacturing | 2019 |
| Asg(Mcr) Limited | Wholesale & retail | 2024 |
| Asgard Controlled Environments Ltd | Professional & scientific | 2009 |
| Asgw Real Estate Limited | Financial services | 2017 |
| ASH & a Ltd | Hospitality | 2024 |
| ASH (Timber) Limited | Wholesale & retail | 1991 |