| A W Jasra Private Limited | Health & social care | 2023 |
| A Walters Construction Management Services Limited | Administrative & support | 2016 |
| A Wilbourn Limited | Administrative & support | 2015 |
| A Winnard Properties Limited | Real estate | 2021 |
| A Wright Mechanical Ltd | Extraterritorial | 2025 |
| A Z B Hybrid Japaness Cars Ltd | Wholesale & retail | 2025 |
| A&A Aruna Limited | Information & communication | 2024 |
| A&A Drivers and Consultancy Ltd | Professional & scientific | 2025 |
| A&A Technology Consultancy Services Ltd | Information & communication | 2013 |
| A&B Autos Ltd | Wholesale & retail | 2018 |
| A&B Designs Limited | Administrative & support | 2024 |
| A&C Engineering Ltd | Administrative & support | 2026 |
| A&E Building & Joinery Limited | Professional & scientific | 2016 |
| A&G Quality Plumbing Ltd | Construction | 2019 |
| A&H Bargain Limited | Wholesale & retail | 2025 |
| A&J Handyman Services Limited | Other services | 2020 |
| A&L Collectables Ltd | Wholesale & retail | 2026 |
| A&L Haulage Ltd | Transport & logistics | 2021 |
| A&M Build and Design Ltd | Construction | 2025 |
| A&M Cliffe Limited | Construction | 2017 |
| A&S Consultancy Ltd | Professional & scientific | 2024 |
| A-Axis Architects Ltd | Administrative & support | 2023 |
| A-Tek (North West) Ltd | Hospitality | 2017 |
| A. D. B. Locksmith Services Limited | Professional & scientific | 2002 |
| A. L. French Ltd | Information & communication | 2021 |
| A. LEE Electrical Limited | Administrative & support | 2016 |
| A. Picton & Sons (Haydock) Limited | Agriculture & fishing | 1965 |
| A. Schulman Thermoplastic Compounds Limited | Manufacturing | 1971 |
| A. Swift - Civil Design Limited | Administrative & support | 2014 |
| A.A.R & K Properties Ltd | Real estate | 2024 |
| A.B.C. - Top Mixer Hire Limited | Manufacturing | 2006 |
| A.B.C.>Concrete Direct Limited | Manufacturing | 2013 |
| A.B.E.T. Recruitment Limited | Administrative & support | 2002 |
| A.D Moran Ltd | Administrative & support | 2025 |
| A.D.S. Estates Limited | Real estate | 2005 |
| A.D.S. Hire Services Limited | Administrative & support | 1999 |
| A.D.S. Holdings Limited | Professional & scientific | 1999 |
| A.D.S. Recycling Limited | Water & waste | 1998 |
| A.E. Marshall & Sons Limited | Agriculture & fishing | 1960 |
| A.E.N Property Ltd | Real estate | 2018 |
| A.I Lighting & Controls Limited | Wholesale & retail | 2016 |
| A.I. Lite Ltd | Professional & scientific | 2023 |
| A.K.M. Heating Limited | Wholesale & retail | 1996 |
| A.M.G. Fishbar Limited | Hospitality | 2018 |
| A.P. Heptonstall Limited | Professional & scientific | 1980 |
| A.P. Procurement Services Limited | Administrative & support | 2009 |
| A.R. Staite Limited | | 1949 |
| A.R.J. Butchers (Shaws) Limited | Hospitality | 1977 |
| A.S Consulting Services Limited | Professional & scientific | 2024 |
| A.S Emporia Ltd | Wholesale & retail | 2025 |
| A.S.L. Instruments Limited | Construction | 2024 |
| A.Store Limited | Real estate | 2000 |
| A.T.A Buildsafe Ltd | Administrative & support | 2025 |
| A.V. Cleaning Services Limited | Administrative & support | 2007 |
| A1 Barber Orfords Ltd | Other services | 2025 |
| A1 Hydraulics (North West) Limited | Other services | 2009 |
| A1 Lawyers Ltd | Professional & scientific | 2013 |
| A1 Safety Testing UK Ltd | Professional & scientific | 2015 |
| A1 Wood Pelletts Ltd | Extraterritorial | 2014 |
| A1-ENVIROSCIENCES Limited | Manufacturing | 2007 |
| A2 Vantage Consulting Ltd | Information & communication | 2025 |
| A2BINVESTMENTPROPERTIES Ltd | Real estate | 2022 |
| A2VR Properties Ltd | Real estate | 2022 |
| A2Z 4 Kids Limited | Wholesale & retail | 2018 |
| A365 Group Limited | Financial services | 2021 |
| A365 Limited | Professional & scientific | 2013 |
| A3S Medicare Ltd | Health & social care | 2017 |
| A4S Solutions Limited | Health & social care | 2015 |
| A5 Homes Ltd | Real estate | 2025 |
| AA - Analysis by Aquil Limited | Administrative & support | 2021 |
| AA Clearances Ltd | Administrative & support | 2022 |
| AA Demolition Ltd | Construction | 2025 |
| AA Dental Services Ltd | Health & social care | 2023 |
| AA Private Wealth Services Ltd | Professional & scientific | 2019 |
| AAA Scholes Limited | Other services | 2021 |
| Aacb Electrical Limited | Construction | 2025 |
| Aadi IT Limited | Administrative & support | 2014 |
| AAI Trading Ltd | Wholesale & retail | 2026 |
| Aaisha Aaliyah Limited | Administrative & support | 2025 |
| AAJ Electrical Solutions Limited | Construction | 2016 |
| AAM IT Solutions Ltd | Professional & scientific | 2026 |
| AAP Prime Ltd | Professional & scientific | 2019 |
| Aardonyx Ltd | Administrative & support | 2023 |
| Aardvark Janitorial Supplies Ltd | Wholesale & retail | 2001 |
| Aaren James Ltd | Information & communication | 2022 |
| Aarishi Investments Ltd | Real estate | 2019 |
| Aarkay Diamonds Ltd | Wholesale & retail | 2025 |
| Aarnav Retail Limited | Wholesale & retail | 2022 |
| Aaron's Beard Limited | Manufacturing | 2024 |
| Aaronson Ltd | Information & communication | 2018 |
| Aaryan & Aira SV Ltd | Real estate | 2025 |
| Aasa Express 1 Ltd | Wholesale & retail | 2024 |
| Aayla's Emporium Ltd | Wholesale & retail | 2020 |
| AB & Co Accountants Ltd | Professional & scientific | 2020 |
| AB Advanced Practice Limited | Health & social care | 2018 |
| AB Advisory Ltd | Other services | 2019 |
| AB Aesthetic Business Academy Ltd | Administrative & support | 2024 |
| AB Aircon Solutions Ltd | Professional & scientific | 2022 |
| AB Autocare Warrington Limited | Wholesale & retail | 2020 |
| AB Autoglaze Ltd | Wholesale & retail | 2024 |