| A & N Valuedent Limited | Wimborne | 2000 |
| A & O Carpentry & Construction Limited | Hailsham | 2024 |
| A & P Catering Services Ltd | Bristol | 2008 |
| A & P Chambers Limited | Inverness | 1986 |
| A & P Engineering Services Limited | Cinderford | 1999 |
| A & P Falmouth Limited | Hebburn | 1909 |
| A & P Fencing (UK) Limited | Staffordshire | 2003 |
| A & P Godfrey Transport Ltd | Scunthorpe | 2022 |
| A & P Home Maintenance Limited | Walsall | 2003 |
| A & P Kabins Limited | Lydney | 2024 |
| A & P Manufacturing Limited | Nottingham | 2002 |
| A & P Tees Limited | Hebburn | 2003 |
| A & P Tools and Products Limited | London | 1946 |
| A & P Turbine Services Limited | St. Andrews | 2009 |
| A & Q Foods Ltd | Birmingham | 2024 |
| A & R Boards Ltd | Dewsbury | 2023 |
| A & R Chemicals Ltd | Oldham | 2012 |
| A & R Engineering Services Limited | Sheffield | 1990 |
| A & R Fabrications Limited | Dereham | 2011 |
| A & R Glazing and Joinery Limited | Abertillery | 2024 |
| A & R House (BCL) Limited | Bleadon | 2014 |
| A & R Maintenance Services Ltd | Newcastle | 2007 |
| A & R Mechanical Engineering & Recovery Services Ltd | Thurso | 2019 |
| A & R Print Solutions Ltd | Wellingborough | 2005 |
| A & R Shopfront Limited | Bexleyheath | 2024 |
| A & R Taylor Holdings Company Limited | Kidderminster | 2023 |
| A & R Timber Products Limited | East Linton | 2005 |
| A & R Tradeprint Ltd | Sheffield | 2004 |
| A & R Tyres CYF | Gaerwen | 2024 |
| A & R Way Limited | Tarbert | 2014 |
| A & R Woodworking Company Oxfordshire Limited | Buckingham | 2014 |
| A & S (Lincs) GAS Services Ltd | Mablethorpe | 2011 |
| A & S Blinds Limited | Birmingham | 2018 |
| A & S Butchers (Birmingham) Ltd | Solihull | 2025 |
| A & S Carpentry Builders Ltd | Fulbourne | 2013 |
| A & S Carpentry Limited | Margate | 2021 |
| A & S Clothing Manufacturers Limited | Birmingham | 1998 |
| A & S Coffee Limited | London | 2018 |
| A & S Commercials Limited | Barnsley | 2011 |
| A & S Controls Limited | Bedford | 2000 |
| A & S Fabrications (Nottingham) Limited | Nottingham | 1984 |
| A & S Finishers Limited | Dewsbury | 2003 |
| A & S Grigg Limited | Sutton Coldfield | 2003 |
| A & S Interiors Limited | Cardiff | 2010 |
| A & S Joinery (MFG) Limited | Huddersfield | 2002 |
| A & S Office Company Limited | St Helens | 2014 |
| A & S Plant Services Limited | Barnsley | 2006 |
| A & S Signs Limited | Birmingham | 2008 |
| A & S Tooling (UK) Limited | Leicester | 2006 |
| A & S Tooling Limited | West Sussex | 2002 |
| A & SZ Ltd | Margate | 2025 |
| A & T Enclosures Limited | Dudley | 1992 |
| A & T Natural Casings Ltd | Ashton-Under-Lyne | 2011 |
| A & T Services Limited | St. Austell | 1990 |
| A & T Supplies (UK) Limited | Rochester | 2011 |
| A & U Fashion Ltd | Enfield | 2022 |
| A & V Cycles Limited | Wolverhampton | 2020 |
| A & W Gowers Limited | Chelmsford | 2000 |
| A & W Precision Tools Limited | Stourbridge | 1987 |
| A & Yannis Ltd | London | 2019 |
| A & Z Engineering (Reading) Limited | Reading | 1999 |
| A + Engineering Ltd | 93-97 Main Street | 2005 |
| A + H Kitchens Limited | Birmingham | 1997 |
| A + S Mckay Sheet Metal Fabrication Ltd | Merseyside | 1994 |
| A - Line Components Ltd | Sheffield | 2001 |
| A - Z Engineering Limited | Ellesmere | 1999 |
| A .M Appliances Limited | Brighton | 2011 |
| A 1 Bacon Company Limited | Harlow | 1979 |
| A 1 Concrete Limited | Lisburn | 2002 |
| A 1 Diamond Halal Meat Limited | Bradford | 2025 |
| A 2 Z Computer Shop Ltd | Leicester | 2018 |
| A 2 Z Windows Limited | Harrow | 2005 |
| A a Electrical Services Limited | Northwood | 2017 |
| A a Flags Limited | Blackhill Consett | 2000 |
| A a Hydraulics Limited | Dungannon | 2006 |
| A a K Joinery Ltd | Liskeard | 2024 |
| A a Mason Limited | Dursley | 2008 |
| A a Rewinds Limited | Kingswinford | 2010 |
| A a Smith Limited | Pontefract | 1976 |
| A a U Limited | Attleborough | 2002 |
| A a Welding Limited | Bolton | 2021 |
| A and a Paisley Ltd | Paisley | 2020 |
| A and C Carpentry Ltd | Kettering | 2013 |
| A and C Products Limited | Coleford | 2021 |
| A and H Butchery Ltd | Stoke-On-Trent | 2021 |
| A and J 12 Limited | Folkestone | 2025 |
| A and J Lilley Limited | Cannock | 2003 |
| A and L Furnishings Limited | Leyland | 2013 |
| A and L Machinery Ltd | Ulceby | 2023 |
| A and L Moorings Limited | Hindhead | 2025 |
| A and M Planters Limited | Kettering | 2022 |
| A and N Service Centre Ltd | Deeside | 2026 |
| A and P Builders (Nantwich) Limited | Crewe | 2014 |
| A and P Properties South West Ltd | St Austell | 2016 |
| A and R Meats Limited | Birmingham | 2001 |
| A and S Engineering Solutions Limited | London | 2011 |
| A and S Stitching Room Ltd | London | 2016 |
| A B Trimming Ltd | Winchester | 2014 |
| A B & Sons Limited | Buxton | 2001 |
| A B Blinds Ltd | Bradford | 2012 |