| 0161-MANC Limited | Manufacturing | 1999 |
| 1881 Property Services Limited | Other services | 2026 |
| 1CABBI Limited | Extraterritorial | 2024 |
| 360 Group Ltd | Real estate | 2005 |
| 4 Your Convenience Limited | Hospitality | 2006 |
| 4D Maintenance Services Limited | Construction | 2003 |
| 61 Albert Road Management Company Limited | Administrative & support | 2003 |
| A & B Plastering and Screeding Limited | Construction | 2014 |
| A & J Carpentry Contractors Limited | Construction | 2003 |
| A & K Jones & Company Limited | Professional & scientific | 2006 |
| A & P Fencing (UK) Limited | Manufacturing | 2003 |
| A a Silencers Limited | Wholesale & retail | 2007 |
| A B Graphic International Limited | Manufacturing | 1954 |
| A D Luxury Coach Sales Ltd | Wholesale & retail | 2025 |
| A G S (Zinc Alloys) Limited | Manufacturing | 1987 |
| A Plus Training (Midlands) Limited | Professional & scientific | 2008 |
| A Quality Solution Limited | Administrative & support | 2011 |
| A to G Energy Assessments Limited | Professional & scientific | 2007 |
| A&J Allen Dairy Hygiene Limited | Other services | 2017 |
| A. C. Bamford Limited | Professional & scientific | 2004 |
| A. L. Williams Limited | Professional & scientific | 2006 |
| A. P. Bamford Limited | Professional & scientific | 2004 |
| A.D.C. Systems Limited | Information & communication | 1992 |
| A.I.A. Installations Limited | Professional & scientific | 1997 |
| A.I.A. Services Limited | Construction | 1991 |
| A.J. Sellman Limited | Other services | 1967 |
| A.L.M Architectural Moulds Ltd | Manufacturing | 2007 |
| A.S.L. Building Services Ltd | Construction | 2006 |
| A1 Mini Skips Limited | Water & waste | 2004 |
| A1 Roofspec Limited | Construction | 2007 |
| A50 Office Furniture Limited | Wholesale & retail | 2000 |
| Aalberts Surface Technologies OCT Limited | Manufacturing | 1998 |
| AAV Systems Ltd | Construction | 2004 |
| ABI Global Limited | Other services | 2003 |
| ABK Plastering and Partitions Limited | Construction | 2002 |
| ABL Development (UK) Ltd | Construction | 2007 |
| Accountancy 4 Growth Limited | Extraterritorial | 1999 |
| Ace Copying Equipment Limited | Wholesale & retail | 1999 |
| Aclipse Consultants Limited | Professional & scientific | 2003 |
| Acme Grounds Services Ltd | Agriculture & fishing | 2005 |
| Acme Tree Services Ltd | Agriculture & fishing | 1999 |
| Acorn Homes (Stoke-On-Trent) Limited | Construction | 2003 |
| ACR Systems (UK) Limited | Real estate | 2004 |
| Acre Pictures Limited | Wholesale & retail | 2016 |
| Acropolis House of Style Limited | Other services | 2003 |
| Action Clad 2001 Limited | Construction | 2000 |
| Actuate Analytics Ltd | Information & communication | 2006 |
| AD Meliora Developments Limited | Real estate | 2026 |
| Adamtech Limited | Manufacturing | 1998 |
| Adcocks Solicitors Limited | Professional & scientific | 2001 |
| Adderley Green Garage Limited | Wholesale & retail | 2005 |
| Addstone Limited | Extraterritorial | 2006 |
| Adrian Wilson Garage Limited | Wholesale & retail | 2002 |
| Afqs Limited | Professional & scientific | 2002 |
| AG Farming Limited | Agriculture & fishing | 2006 |
| Agricultural Requisites and Mechanizations Limited | Water & waste | 1947 |
| Airspeed Translations Limited | Administrative & support | 2006 |
| Alders (Tamworth) Limited | | 1936 |
| Alega Limited | Real estate | 1998 |
| Alfauld Holdings Ltd | Financial services | 2006 |
| Alison O'Mara Floral Design Limited | Wholesale & retail | 2007 |
| Alive Publishing Trading UK Ltd | Other services | 2007 |
| ALL Car Exhausts and Tyres Limited | Wholesale & retail | 1984 |
| ALL Foods Storage Limited | Other services | 2016 |
| Allports Garages Limited | Wholesale & retail | 1959 |
| Alton Equipment Limited | Wholesale & retail | 2003 |
| Altplan Holdings Limited | Professional & scientific | 2002 |
| Ammnet Limited | Information & communication | 2000 |
| Amorartis Limited | Professional & scientific | 2007 |
| Amycel (UK) Limited | Wholesale & retail | 1992 |
| Anaco Developments Limited | | 1989 |
| Anderson & Shepherd Limited | Extraterritorial | 2002 |
| Angus Mackinnon Limited | Wholesale & retail | 2000 |
| Anita MO Ltd | Real estate | 2006 |
| ANN Clark Hair Design Limited | Other services | 1999 |
| ANN Skidmore Associates Limited | Professional & scientific | 2003 |
| Antelope I.T. Ltd | Information & communication | 1996 |
| Antiques Within Limited | Wholesale & retail | 1994 |
| AP Electrical Contracts Limited | | 2006 |
| AP WIP Investments Borrower UK Ltd | Other services | 2023 |
| Apeton Associates Limited | Professional & scientific | 2006 |
| Apex Systems Global Limited | Information & communication | 2016 |
| Aqwise UK Limited | Water & waste | 2019 |
| Aramell Limited | Information & communication | 2013 |
| Arborcare Tree Surgery Ltd | Agriculture & fishing | 2003 |
| Arelis Psychological Solutions Ltd | Health & social care | 2026 |
| Armstrongs Health & Herbal Store Ltd | Wholesale & retail | 2006 |
| Arrowhead Systems Limited | Information & communication | 1992 |
| Ashcroft Exclusive Homes Limited | Real estate | 2007 |
| Ashwood Law Wealth Management Limited | Financial services | 1998 |
| Astrapac(Midlands)Limited | Manufacturing | 1974 |
| Atkins Construction Limited | Construction | 2005 |
| Atpsl Ltd | Information & communication | 2024 |
| Attobyte Limited | Information & communication | 1996 |
| Aucuba Landscapes Limited | Administrative & support | 2005 |
| Aura Nexus Limited | Wholesale & retail | 2024 |
| Auto Motorvan Limited | Wholesale & retail | 2007 |
| Automation and Technical Services Ltd | Professional & scientific | 2005 |
| Autopoint Contracts Limited | Transport & logistics | 2000 |
| Axis Commercial Management Limited | Construction | 2007 |