| Assif Ltd | Information & communication | 2019 |
| Assima R&D UK Limited | Information & communication | 2010 |
| Assist 365 Ltd | Professional & scientific | 2025 |
| Assistant Plus Ltd | Administrative & support | 2020 |
| Assisted Dynamics Limited | Administrative & support | 2008 |
| Assistory Ltd | Wholesale & retail | 2024 |
| Assistquik Ltd | Information & communication | 2025 |
| Associated Bodyshop Factors Limited | Financial services | 2004 |
| Associated Group Holdings Limited | Financial services | 2023 |
| Associated Plastics Limited | Professional & scientific | 1993 |
| Associated Retail Services Limited | Wholesale & retail | 2005 |
| Associated Safe Systems Limited | Extraterritorial | 2011 |
| Associated Security Services Holdings Limited | Professional & scientific | 2009 |
| Associated Security Services Limited | Extraterritorial | 1989 |
| Associated Security Solutions Limited | Manufacturing | 2011 |
| Associated West Pennine Couriers Limited | Transport & logistics | 2002 |
| Association for Business Psychology Limited | Other services | 2002 |
| Association of Slovak Healthcare Professionals in the UK C.I.C. | Administrative & support | 2023 |
| Association of South Asian Midwives C.I.C. | Health & social care | 2020 |
| Associazione Amici Teatro Italiano Manchester | Arts & recreation | 2022 |
| Assogba Limited | Wholesale & retail | 2025 |
| Assuracc Limited | Professional & scientific | 2019 |
| Assurance Consulting Limited | Professional & scientific | 2007 |
| Assure Health Group Ltd | Health & social care | 2023 |
| Assure Language & Craft Ltd | Education | 2026 |
| Assure Support Services Ltd | Administrative & support | 2025 |
| Assurecert Consulting Limited | Professional & scientific | 2024 |
| Assured Choice Ltd | Professional & scientific | 2020 |
| Assured Claims Limited | Financial services | 2022 |
| Assured Consultancy Limited | Professional & scientific | 2018 |
| Assured Contracting Group Ltd | Professional & scientific | 2025 |
| Assured Contracting Ltd | Professional & scientific | 2015 |
| Assured CPD Ltd | Education | 2026 |
| Assured Docs Limited | Financial services | 2017 |
| Assured Energy Solutions Limited | Administrative & support | 2008 |
| Assured Finance Limited | Financial services | 2020 |
| Assured Fine Furniture Limited | Manufacturing | 2003 |
| Assured FIX Interiors Ltd | Construction | 2021 |
| Assured Flooring Ltd | Construction | 2021 |
| Assured Independent Services Ltd | Transport & logistics | 2021 |
| Assured Lettings (NW) Limited | Construction | 2023 |
| Assured Lettings Ltd | Real estate | 2018 |
| Assured Northwest Limited | Construction | 2014 |
| Assured Review Ltd | Financial services | 2013 |
| Assured Thermal & Plumbing Ltd | Construction | 2025 |
| Assurepath Ltd | Information & communication | 2025 |
| Assurrance Security Limited | Administrative & support | 2021 |
| AST 123 Limited | Hospitality | 2013 |
| AST Global Limited | Public administration | 2009 |
| AST Horizon Limited | Wholesale & retail | 2024 |
| AST Redux Ltd | Professional & scientific | 2024 |
| Asta Enterprise Ltd | Real estate | 2023 |
| Astancare Limited | Public administration | 2025 |
| Astar Studios Music Limited | Information & communication | 2012 |
| Astbridge Limited | Wholesale & retail | 2023 |
| Astbury Air Conditioning Ltd | Construction | 2026 |
| Astbury Building Services Ltd | Construction | 2024 |
| Astct 2021 Ltd | Administrative & support | 2021 |
| Astec Computing (UK) Limited | Information & communication | 1994 |
| Astec Engineering Limited | Professional & scientific | 1999 |
| Asteria Studios Ltd | Arts & recreation | 2022 |
| Asterisk Connect Ltd | Transport & logistics | 2025 |
| Asterisk Creative Consultants Limited | Real estate | 1994 |
| Astermill Limited | Extraterritorial | 1976 |
| Asteroid Mining Corporation Limited | Manufacturing | 2016 |
| Astetica Aesthetics Limited | Wholesale & retail | 2023 |
| Astetica Group Ltd | Wholesale & retail | 2024 |
| Astg Property Group Limited | Real estate | 2024 |
| Asthetics Health Ltd | Health & social care | 2020 |
| Asti Art Boots Limited | Manufacturing | 2022 |
| Asti Art Limited | Arts & recreation | 2021 |
| Asti Art Portfolio Limited | Wholesale & retail | 2024 |
| Astl Property ASS. Ltd | Real estate | 2024 |
| Astl Property Ltd | Hospitality | 2024 |
| Astles Auto Repairs Ltd | Wholesale & retail | 2021 |
| Astley & Tyldesley Miners' Welfare Institute and Recreation Grounds Ltd | Other services | 1991 |
| Astley Bathroom Designs Limited | Construction | 2022 |
| Astley Bridge Blinds LLP | | 2014 |
| Astley Business Park Management Company Limited | Extraterritorial | 2009 |
| Astley Car Wash Limited | Administrative & support | 2022 |
| Astley Electrical Ltd | Construction | 2019 |
| Astley Fire Protection Limited | Construction | 2003 |
| Astley Glass Co. Limited | Construction | 1974 |
| Astley Hall Trading Ltd | Wholesale & retail | 2023 |
| Astley Healthcare Limited | Wholesale & retail | 2023 |
| Astley Hiabs Ltd | Transport & logistics | 2008 |
| Astley House Limited | Water & waste | 2022 |
| Astley Housing Partners Ltd | Real estate | 2024 |
| Astley Mews Limited | Construction | 2022 |
| Astley Projects Holdings Limited | Financial services | 2026 |
| Astley Property Limited | Real estate | 2026 |
| Astley Sand & Aggregates Limited | Mining & quarrying | 1973 |
| Astley Self Store Limited | Real estate | 2024 |
| Astley Solar & Renewable Energy LLP | | 2013 |
| Astley Spice Ltd | Hospitality | 2014 |
| Astley Tiling Ltd | Construction | 2026 |
| Astley Van Hire Limited | Professional & scientific | 2010 |
| Astley Youth Band | Arts & recreation | 2016 |
| Astleycomputers Limited | Manufacturing | 2018 |
| Astok IT Solutions Limited | Professional & scientific | 2013 |