| .Dsaesthetics Ltd | Other services | 2025 |
| 15 & 16 Renness Road Management Company Limited | Real estate | 2013 |
| 1DISENO Ltd | Wholesale & retail | 2024 |
| 2013 POP UP Limited | Professional & scientific | 2014 |
| 258 Hornby Road RTM Company Ltd | Households | 2017 |
| 367 Properties Ltd | Real estate | 2025 |
| 4C Access (UK) Limited | Construction | 2017 |
| 4L Solutions Limited | Construction | 2024 |
| 69 Vape Shop Ltd | Other services | 2024 |
| 74-84 Pendinas RTM Company Limited | Real estate | 2013 |
| A & J Palmer Limited | Health & social care | 2012 |
| A & S Newton Cleaning Services Ltd | Administrative & support | 2019 |
| A & S Transport (Chester) Limited | Real estate | 1985 |
| A and N Service Centre Ltd | Manufacturing | 2026 |
| A B R Contracting Services Ltd | Administrative & support | 2025 |
| A C C Courier Ltd | Transport & logistics | 2023 |
| A E Harris & Co Limited | Wholesale & retail | 2012 |
| A Hibbert Limited | Transport & logistics | 2013 |
| A J Field Electrical Limited | Construction | 2008 |
| A J Field Holdings Limited | Construction | 2014 |
| A M Wyatt & Co Limited | Professional & scientific | 2020 |
| A R T Services (Cymru) Limited | Other services | 2009 |
| A Space to Make Ltd | Arts & recreation | 2026 |
| A Spencer Electrical Contracts Limited | Construction | 2019 |
| A&J Pritchard&Son CYF. | Agriculture & fishing | 2023 |
| A&M Signature Ltd | Transport & logistics | 2024 |
| A&P HR Solutions Ltd | Administrative & support | 2015 |
| A-Talks Ltd | Administrative & support | 2025 |
| A.C.C & Recovery NW Ltd | Transport & logistics | 2025 |
| A.D.A. Shopfittings Limited | Wholesale & retail | 2013 |
| AAA Cars and Mini Buses Limited | Transport & logistics | 2018 |
| AAA Cars and Mini Buses Ltd Ltd | Transport & logistics | 2026 |
| Abbi Access Scaffolding Limited | Construction | 2010 |
| Abbi Access Services Limited | Construction | 2006 |
| ABC Abersoch Property Limited | Hospitality | 2021 |
| Aber Roof Truss Limited | Wholesale & retail | 1998 |
| Abigail Louise Aesthetics Ltd | Health & social care | 2021 |
| Acai Outdoorwear Ltd | Manufacturing | 2016 |
| Ace Lifts Ltd | Manufacturing | 1985 |
| Achieve More Training Ltd | Education | 2019 |
| Adam Sterry Racing Limited | Arts & recreation | 2016 |
| ADK Site Services Ltd | Construction | 2021 |
| Admissia Associates Limited | Administrative & support | 2013 |
| Adrian Morjolic Ltd | Transport & logistics | 2023 |
| Adrian Stewart Davies Limited | Professional & scientific | 2017 |
| Adroit Group Dental Ltd | Financial services | 2020 |
| Advanced Renewable Energy Supplies Ltd | Construction | 2023 |
| Advocare Healthcare Ltd | Health & social care | 2025 |
| Advocare Recruitment Ltd | Administrative & support | 2023 |
| AE Logictics Ltd | Transport & logistics | 2026 |
| Aerial Bliss Studio Limited | Arts & recreation | 2025 |
| Aesin Limited | Manufacturing | 2020 |
| Aesthetics EI Ltd | Professional & scientific | 2026 |
| AG Golf Media Limited | Professional & scientific | 2021 |
| AHG Golf Limited | Wholesale & retail | 2023 |
| AHG Management Services Limited | Administrative & support | 2015 |
| Aircamo Aviation Ltd | Professional & scientific | 2015 |
| Aircamo Engines Ltd | Manufacturing | 2020 |
| Akers & Dickinson Limited | Professional & scientific | 1967 |
| Akgot Limited | Health & social care | 2025 |
| Alavia Limited | Manufacturing | 2017 |
| Alesof Trans Ltd | Wholesale & retail | 2026 |
| ALJ DC Limited | Administrative & support | 2025 |
| ALJ Properties (NW) Limited | Real estate | 2024 |
| Aljisir Technology Ltd | Manufacturing | 2008 |
| ALL in: Mental Wellbeing Services Ltd | Health & social care | 2024 |
| ALL Seasons Roofing Contractors Limited | Construction | 2016 |
| ALL Your Safety Needs Limited | Public administration | 2024 |
| Allequa Ltd | Manufacturing | 2025 |
| Allied Medical Services (UK) Limited | Professional & scientific | 1997 |
| Alltair Structures Limited | Professional & scientific | 2026 |
| Allwood Treecare Ltd | Administrative & support | 2025 |
| Alpha-Med (Medical & Surgical) Limited | Health & social care | 1991 |
| Alternative Logic (UK) Limited | Information & communication | 2003 |
| Alternative Logic Limited | Information & communication | 2001 |
| AM Recycling (Holdings) Limited | Professional & scientific | 2020 |
| AM Recycling Limited | Water & waste | 2007 |
| Ambia Takeaway Ltd | Hospitality | 2015 |
| Ambitious Creative Ltd | Professional & scientific | 2013 |
| Amcare Limited | Health & social care | 1996 |
| Ames Prime Property Limited | Real estate | 2014 |
| Amron Solutions Ltd | Administrative & support | 2024 |
| ANS Appliance Network Solutions Limited | Administrative & support | 2006 |
| Anthony Ayoade Associates Ltd | Real estate | 2024 |
| Anton Florek Associates Ltd | Professional & scientific | 2018 |
| Anwyl Construction Company Limited | Construction | 1947 |
| Anwyl Group Limited | Construction | 2002 |
| Anwyl Land Limited | Real estate | 2016 |
| Apex Kart Limited | Arts & recreation | 2015 |
| Aphex Solutions Limited | Financial services | 2024 |
| APM Customs Limited | Wholesale & retail | 2018 |
| APM Graphics Ltd | Wholesale & retail | 2011 |
| APS Accountancy Services Limited | Professional & scientific | 2012 |
| Apsu Ltd | Health & social care | 2016 |
| ARC Management Consultancy Limited | Professional & scientific | 2016 |
| Ardagh HP Holding Ltd | Financial services | 2021 |
| Ardagh Metal Packaging Holdings Limited | Financial services | 2021 |
| Ardagh Metal Packaging Holdings UK Limited | Professional & scientific | 2015 |
| Ardagh Metal Packaging Pension Trustee Limited | Financial services | 2022 |
| Ardagh Metal Packaging UK Limited | Manufacturing | 1990 |