| A Class Cleaners Ltd | Administrative & support | 2020 |
| A Cross TM Ltd | Transport & logistics | 2024 |
| A D Maclean Services Limited | Information & communication | 2020 |
| A E I (North West) Limited | Construction | 2003 |
| A F Chadwick Property Investments Ltd | Real estate | 2024 |
| A Fruit & VEG Ltd | Wholesale & retail | 2023 |
| A G Carter Limited | Health & social care | 2008 |
| A Harrison Properties Limited | Real estate | 2025 |
| A Home From Holmes Ltd | Hospitality | 2019 |
| A Hope Lettings Ltd | Real estate | 2016 |
| A M News Ltd | Wholesale & retail | 2015 |
| A Moment's Inspiration Ltd | Professional & scientific | 2016 |
| A Plus a Civils and Groundworks Limited | Construction | 2023 |
| A Reynolds Electrical Ltd | Construction | 2010 |
| A Star Tyres Recycling Ltd | Water & waste | 2023 |
| A T Structural Carpentry Limited | Construction | 2013 |
| A Theodore Company Ltd | Professional & scientific | 2023 |
| A to Z Garden Buildings Limited | Manufacturing | 2024 |
| A V Spark Access Ltd | Other services | 2017 |
| A Voice for the Animals Limited | Administrative & support | 2023 |
| A Wright Properties Ltd | Real estate | 2024 |
| A&A Consulting Limited | Wholesale & retail | 2014 |
| A&A Kabab House Ltd | Hospitality | 2017 |
| A&G Lancs Ltd | Hospitality | 2023 |
| A&G Roofing Contractors Ltd | Construction | 2025 |
| A&O Consultants Ltd | Professional & scientific | 2022 |
| A&S Fabrication Services Limited | Manufacturing | 2017 |
| A&T Transport Solutions Limited | Transport & logistics | 2025 |
| A-Murad Group Ltd | Hospitality | 2025 |
| A. Nelson (Blackpool) Limited | Construction | 2004 |
| A. S. E. T. S. (U. K.) Ltd | Other services | 1996 |
| A. Tattersall Interiors Limited | | 2005 |
| A.C.C.Demonstrations Ltd | Wholesale & retail | 2025 |
| A.C.W. Investment Properties Limited | Real estate | 2025 |
| A.D. Jarman Limited | Professional & scientific | 2020 |
| A.D. Systems (UK) Ltd | Manufacturing | 2008 |
| A.D.H Rope Works Ltd. | Construction | 2014 |
| A.E Engineering (Fylde) Limited | Wholesale & retail | 2010 |
| A.E.P (NW) Developments Ltd | Construction | 2018 |
| A.F. Drabble Engineers Limited | Manufacturing | 2005 |
| A.H.M.I Realestate Limited | Real estate | 2025 |
| A.J. Cornall (Contractors) Limited | Construction | 2001 |
| A.J. Cornall (Holdings) Limited | Construction | 2015 |
| A.J.B Property Maintenance Services Ltd | Construction | 2025 |
| A.M Building Solutions Ltd. | Other services | 2018 |
| A.M.H Rigging Limited | Construction | 2010 |
| A.P. Subcontracting Limited | Information & communication | 2011 |
| A.P.A. (Blackpool) Limited | Wholesale & retail | 2003 |
| A.S.K.Convinces Store Limited | Wholesale & retail | 2025 |
| A.V.A CAD Solutions Limited | Professional & scientific | 2016 |
| A1 Accounting Solution Ltd | Professional & scientific | 2019 |
| A1 Caravan Sales Ltd | Wholesale & retail | 2016 |
| A1 Leisure and Investments Ltd | Wholesale & retail | 2016 |
| A1 Streamline Road Markings Ltd | Construction | 2016 |
| A2A Training and Development Ltd | Education | 2022 |
| A2B Payment Solutions Ltd | Professional & scientific | 2022 |
| A2B Power Solutions Ltd | Wholesale & retail | 2023 |
| A2Z Digital Vision Ltd | Wholesale & retail | 2022 |
| A6 Electrician LLP | | 2018 |
| AA Civil Engineering Ltd | Construction | 2017 |
| AA Glass & Glazing Ltd | Construction | 2010 |
| AA Motorhome Rentals Ltd | Administrative & support | 2023 |
| AA Retail Ltd | Wholesale & retail | 2020 |
| AAA Facilities Ltd | Real estate | 2026 |
| AAA Poperty Development Limited | Construction | 2026 |
| AAA Security Limited | Administrative & support | 2017 |
| AAA Storage Solutions Ltd | Administrative & support | 2021 |
| AAG Electrical Building Services Ltd | Construction | 2019 |
| Aarrav Limited | Information & communication | 2011 |
| Aashun Marketing Ltd | Information & communication | 2018 |
| Aayoosh Ltd | Manufacturing | 2020 |
| AB Contract Solutions Ltd | Construction | 2019 |
| AB Conveyancing Solutions Ltd | Professional & scientific | 2017 |
| AB Fylde Marketing Ltd | Other services | 2023 |
| AB Nautica Limited | Extraterritorial | 2022 |
| AB Offshore Ltd | Professional & scientific | 2018 |
| AB R&D Advisors Ltd | Professional & scientific | 2026 |
| AB Signature Stays Ltd | Real estate | 2025 |
| AB Westminster Ltd | Education | 2023 |
| Abacus Insulation Ltd | Professional & scientific | 2013 |
| Abbey Meadows Management(Dalton in Furness) Limited | Households | 2019 |
| Abbey Plumbing Limited | Construction | 1993 |
| Abbey Property (North West) Limited | Construction | 2004 |
| Abbotsford House (Penrith) Management Limited | Households | 1995 |
| Abbott Estates Limited | Professional & scientific | 2016 |
| ABC Academy Limited | Wholesale & retail | 2024 |
| Abco Elite Ltd | Construction | 2025 |
| Abdul Wali Ltd | Wholesale & retail | 2026 |
| Abdul's News Ltd | Wholesale & retail | 2019 |
| Abdur and Sons Ltd | Hospitality | 2025 |
| Aber Promotions Ltd | Other services | 2024 |
| Aberco Limited | Wholesale & retail | 2025 |
| ABI Tools Limited | Information & communication | 2018 |
| Abigail Dowling Limited | Information & communication | 2017 |
| Ability 2 Achieve Care & Support Limited | Health & social care | 2016 |
| Abinash Ltd | Wholesale & retail | 2016 |
| Abingdon Studios | Arts & recreation | 2016 |
| ABL Property Limited | Real estate | 2023 |
| Able Sports Management Ltd | Arts & recreation | 2013 |
| ABM Academy Limited | Education | 2013 |