| 101 A&B Bampton Street Ltd | Households | 2016 |
| 180 IT Contracting Ltd | Other services | 2019 |
| 22 Salons Ltd | Other services | 2025 |
| 24 Eleven Limited | Information & communication | 2015 |
| 360AIR Limited | Construction | 2025 |
| 3PLUK Ltd | Transport & logistics | 2007 |
| 4 Sports Coaching Ltd | Education | 2022 |
| 4PLUK Limited | Transport & logistics | 2013 |
| 7UN Ltd | Wholesale & retail | 2020 |
| 85 Warrington Crescent Management Company Limited | Professional & scientific | 1999 |
| 8BITS1BYTE Limited | Wholesale & retail | 2020 |
| A & P Building Services Limited | Construction | 2002 |
| A & T Caravans Limited | Wholesale & retail | 1998 |
| A D Lake Limited | Real estate | 2024 |
| A J Croydon Limited | Agriculture & fishing | 2011 |
| A J Motors Llansilin Limited | Wholesale & retail | 2021 |
| A J'S Powder Coating Ltd | Construction | 2021 |
| A Kendall Limited | Construction | 2014 |
| A Owen & Sons Construction Services Ltd | Construction | 2015 |
| A Penrose and Sons Limited | Construction | 2021 |
| A R Allen (Shropshire) Limited | Wholesale & retail | 2014 |
| A&S Kitchens Limited | Construction | 2023 |
| A. Evans and Sons (Haulage) Limited | Professional & scientific | 1994 |
| AAJ3 Limited | Hospitality | 2023 |
| Ab&I Advisory Limited | Financial services | 2019 |
| Abagar 2020 Ltd | Education | 2020 |
| ABC Consulting Group (Shropshire) Limited | Professional & scientific | 2014 |
| Abiel Park Ltd | Professional & scientific | 2024 |
| Able 8 Limited | Construction | 2021 |
| Able 9 Limited | Real estate | 2022 |
| Able Governance Ltd | Other services | 2014 |
| Able Gutter Systems Limited | Extraterritorial | 1985 |
| Absolute Music Services Ltd. | Arts & recreation | 2012 |
| Access Building Solutions Ltd | Construction | 2022 |
| Access Design & Build Solutions Limited | Construction | 2024 |
| Access Window and Door Solutions Limited | Construction | 2023 |
| Action Information Technologies Limited | Information & communication | 1986 |
| Active 8 Gym Limited | Arts & recreation | 2016 |
| Active Vtol Crash Prevention Limited | Professional & scientific | 2017 |
| ACTIVE8 Studio Limited | Real estate | 2020 |
| Adaptlive Limited | Construction | 2023 |
| ADC Training Limited | Professional & scientific | 2022 |
| ADG Procurement Limited | Administrative & support | 2014 |
| Admu Consulting Ltd | Extraterritorial | 2025 |
| Advanced Blast & Ballistic Systems Limited | Professional & scientific | 2009 |
| Advanced Reaction Motor Systems Limited | Professional & scientific | 2014 |
| AE Union Limited | Hospitality | 2026 |
| Aerolearn Flight Training Ltd | Education | 2025 |
| Affine Resourcing Ltd | Arts & recreation | 2019 |
| AFT Composites Limited | Administrative & support | 2012 |
| AGD & RS Holdings Limited | Financial services | 2026 |
| Agri Electronics Ltd | Manufacturing | 2025 |
| Agritech International Solutions Ltd | Other services | 2010 |
| AHL Estates LLP | | 2012 |
| AHL Real Estates Ltd | Real estate | 2024 |
| Aico | Wholesale & retail | 1990 |
| AIM Medical Aesthetics Ltd | Other services | 2024 |
| AIR2HEAT Ltd | Construction | 2020 |
| Airco Associates Limited | Professional & scientific | 2018 |
| Aitcheson Timepieces Ltd | Manufacturing | 2025 |
| Aj's Garage Ltd | Wholesale & retail | 2015 |
| Ajac Office Solutions Ltd | Wholesale & retail | 2011 |
| AJD Horizons Limited | Professional & scientific | 2025 |
| AJT Machine Hire Limited | Administrative & support | 2009 |
| AK Arms Limited | Hospitality | 2026 |
| Alan's Skip Hire Limited | Water & waste | 2003 |
| Alan's Skip Hire Wales Limited | Water & waste | 2005 |
| Alderoak Accountancy Services Limited | Agriculture & fishing | 2019 |
| Aled R Davies Fcca Ltd | Professional & scientific | 2015 |
| Alex Merlin Consultancy Limited | Administrative & support | 2012 |
| ALI Barber Oswestry Ltd | Other services | 2024 |
| Allcarz Ltd. | Wholesale & retail | 2016 |
| Allenby Douglas Limited | Health & social care | 2000 |
| Allsorts to Buy NOW Limited | Construction | 2017 |
| Allumroll Ltd | Construction | 2022 |
| Altterra Ltd | Education | 2026 |
| Aluminate Clinic Ltd | Other services | 2021 |
| Aluroll Limited | Manufacturing | 2004 |
| Aluroll Security Limited | Extraterritorial | 2022 |
| Amanda Freeman Consultancy Ltd | Administrative & support | 2026 |
| Amber (Oswestry) Limited | Construction | 2022 |
| Amber's Wood Fired Kitchen Ltd | Hospitality | 2019 |
| Ambersky Limited | Information & communication | 2004 |
| AMF Vaughan Building Services Limited | Construction | 2025 |
| AMK Global Services Ltd | Wholesale & retail | 2025 |
| Anabolic Apparel Ltd | Wholesale & retail | 2022 |
| Anastasico Limited | Construction | 2024 |
| Anculo Ltd | Financial services | 2018 |
| Andrew Grindley Financial Services Limited | Financial services | 2013 |
| Andy Thomas Electrical Services Ltd | Construction | 2015 |
| ANN Parry Associates Limited | Health & social care | 2016 |
| Anna Dempsey Designs Limited | Professional & scientific | 2012 |
| ANR22 Limited | Hospitality | 2024 |
| Anstalt Limited | Professional & scientific | 1988 |
| Anymove Removals & Storage Ltd | Transport & logistics | 2023 |
| Apcc Developments Ltd | Construction | 2023 |
| APM A1 Limited | Extraterritorial | 2023 |
| APM Assets Commercial Ltd | Real estate | 2023 |
| APM Assets Ltd | Financial services | 2020 |
| APM Developments Ltd | Construction | 2018 |