| AML Cctv Limited | Administrative & support | 2007 |
| Amsgro Limited | Manufacturing | 2003 |
| Anderstore Limited | Construction | 1994 |
| Andrew Addison Limited | Construction | 2004 |
| Andrew Lomas Optometrist Ltd | Health & social care | 2005 |
| Andrew Tales Limited | Construction | 2003 |
| Andy Flood (Rigging) Limited | Arts & recreation | 2002 |
| Annapurna Indian Dance Company | Arts & recreation | 2002 |
| Ansari Welfare Trust (UK) | Other services | 2006 |
| Anthony J Blaza & Partner Limited | Professional & scientific | 2007 |
| Anthony J.Blaza & Associates Limited | Professional & scientific | 2001 |
| Antony Pepper Limited | Wholesale & retail | 2025 |
| Apex Court (Leeds) Management Company Limited | Households | 1997 |
| Apharmloc Limited | Other services | 2008 |
| APN Business Consultants Limited | Professional & scientific | 2005 |
| Appersett Limited | Professional & scientific | 2005 |
| Appleyard Joinery Limited | Construction | 2006 |
| APS Signs Limited | Manufacturing | 2003 |
| Aquaspersions Limited | Manufacturing | 1974 |
| AR Travel & Tours Ltd | Administrative & support | 2003 |
| Ararat Properties Limited | Real estate | 2000 |
| ARC Consulting Ltd | Professional & scientific | 2006 |
| ARC Design Partners Limited | Real estate | 2003 |
| ARC Electrical Solutions Limited | Construction | 2006 |
| Arcade Sewing Machines (Huddersfield) Limited | Wholesale & retail | 2005 |
| Archer Engineering (Leeds) Limited | Manufacturing | 1973 |
| Archway Engineering (U.K.) Limited | Manufacturing | 1991 |
| Ardagh Glass (UK) Limited | Professional & scientific | 1919 |
| Ardagh Glass Limited | Manufacturing | 1956 |
| Area Rugs and Carpets Limited | Manufacturing | 2002 |
| Argo Build International Limited | Professional & scientific | 2006 |
| ARL Enterprises (Europe) Limited | | 2007 |
| Armitage Cleaning Limited | Other services | 2003 |
| Armitage Specialised Frames Ltd | Wholesale & retail | 2006 |
| Armstrong-Priestley Limited | Construction | 1976 |
| Arooj Limited | Health & social care | 2003 |
| Around the Clock Stores Limited | Wholesale & retail | 2000 |
| Arrow Squash Limited | Other services | 1976 |
| Art Display Limited | Manufacturing | 2004 |
| Arthur Brotherton Ltd | Water & waste | 2005 |
| Arthur Pipkins Ltd | Manufacturing | 2009 |
| Ascot Family Investment Company Limited | Financial services | 2026 |
| Asha Neighbourhood Project Limited | Health & social care | 1986 |
| Ashbourne Upholstery Limited | Wholesale & retail | 1994 |
| Ashdale Concrete Limited | Wholesale & retail | 1981 |
| Ashday (1986) Limited | Arts & recreation | 1986 |
| Ashil Limited | Hospitality | 2004 |
| Ashley Wallace Limited | | 1991 |
| Ashrope Limited | Manufacturing | 1982 |
| Aspire Learning and Development Solutions Ltd | Professional & scientific | 2005 |
| Aspli Safety Limited | Wholesale & retail | 1978 |
| Assent Building Compliance Limited | Professional & scientific | 2004 |
| Astin Trading Solutions Ltd | Wholesale & retail | 2005 |
| Astoria Construction (Yorkshire) Limited | | 2008 |
| ATA Trades Ltd | Wholesale & retail | 2026 |
| Athene Services Limited | Health & social care | 2007 |
| Atique Textiles Limited | Wholesale & retail | 2002 |
| Atkinson Firth Solicitors Limited | Professional & scientific | 2017 |
| Atkinsons Butchers Limited | Wholesale & retail | 2003 |
| Audeon Limited | Professional & scientific | 2004 |
| Augean Treatment Limited | Water & waste | 2000 |
| Automobile Association Personal Finance Limited | Financial services | 1983 |
| Automotive Supplies Ltd | Wholesale & retail | 2005 |
| Autosound Limited | Wholesale & retail | 1965 |
| AV2000 Limited | Administrative & support | 1999 |
| Aylesbury Street Services Limited | Professional & scientific | 1990 |
| B & D Products (Halifax) Limited | Manufacturing | 1945 |
| B & H Travel Ltd | Transport & logistics | 2007 |
| B & K Forklift Trucks Limited | Wholesale & retail | 2006 |
| B J Design & Build Limited | Wholesale & retail | 1991 |
| B J Gilboy Limited | Construction | 2003 |
| B R G Plant Hire Limited | Construction | 2003 |
| B&T Roofing Services Limited | Construction | 2003 |
| B. Jenkinson & Sons Limited | Wholesale & retail | 2005 |
| B. Morland & Co. Limited | Wholesale & retail | 1946 |
| B.T. Refrigeration Limited | Manufacturing | 2003 |
| Bacup Industries Limited | | 2007 |
| Bahadur Properties Limited | Real estate | 2004 |
| Bailand Masonry Limited | Construction | 2004 |
| Baildon Stores Limited | Wholesale & retail | 2005 |
| Bailey Construction (Yorkshire) Limited | Construction | 1982 |
| Balancebest Limited | Wholesale & retail | 1977 |
| Bangladeshi Youth Organisation | Education | 2003 |
| Bankhead Construction Limited | Construction | 2022 |
| Baratin Limited | Professional & scientific | 2005 |
| Barden Bunk Barn Ltd | Hospitality | 2006 |
| Barfield Distribution Limited | Wholesale & retail | 1998 |
| Barge Transport Limited | Transport & logistics | 1988 |
| Baric Properties Limited | Real estate | 2001 |
| Barnes Business Services Limited | Professional & scientific | 2000 |
| Barnett Sanderson Design Limited | Construction | 1993 |
| Barplan Limited | Financial services | 2001 |
| Barry Moore Builders & Joiners Limited | Construction | 2002 |
| Baslocke Limited | Real estate | 1999 |
| Batheaston Cabinet Makers Limited | Manufacturing | 2003 |
| Battery MAN (Yorkshire) Limited | Manufacturing | 2005 |
| Bavester Electrical Limited | Construction | 2005 |
| Bayswater Contractors Limited | Administrative & support | 1997 |
| BBN Fastnet Limited | Wholesale & retail | 1994 |
| BBR Graphic Sales Limited | Wholesale & retail | 1998 |