| A J Autolecs Limited | Kilwinning | 2003 |
| A J B Energy Ltd | Beverley | 2026 |
| A J B Engineering Services Limited | Maidenhead | 2002 |
| A J B Reprographics Limited | Stoke-On-Trent | 2009 |
| A J Barnes Silver Restorer Limited | Herts | 2004 |
| A J Bell Construction Ltd | London | 2025 |
| A J Bell Electrics Ltd | Birmingham | 2014 |
| A J Boat Canopies Ltd | Near Daventry | 2012 |
| A J Brewing Ltd | Ashbourne | 2024 |
| A J Brickcutters Chimneys Limited | Hassocks | 2017 |
| A J C (Yorkshire) Ltd | Sheffield | 2011 |
| A J Composites Ltd | Cambridge | 2022 |
| A J Contract Carpentry Ltd | Colchester | 2021 |
| A J Control Products Limited | Birmingham | 2005 |
| A J Dunbar (Engineering) Limited | Oldmeldrum | 1976 |
| A J ENG Limited | Cardiff | 2016 |
| A J Engravers Ltd | Norwich | 2003 |
| A J Fabrications (Northampton) Limited | Northampton | 2005 |
| A J Fibre Connections Ltd | Spalding | 2019 |
| A J Gandham Ltd | Kettering | 2020 |
| A J Henson Carpentry Limited | Wisbech | 2023 |
| A J Horseboxes Ltd | Thirsk | 2018 |
| A J Hoskins & Sons Limited | Leominster | 2008 |
| A J J EXO Skeletons Ltd | St. Asaph | 2025 |
| A J L Electrical Sales Limited | Billericay | 2002 |
| A J Lill Welding Services Ltd | Market Rasen | 2026 |
| A J Ludlow Ltd | Pembroke Dock | 2018 |
| A J Mobile Tyres 24/7 Limited | Bexleyheath | 2024 |
| A J Oliver Ltd | Beverley | 2002 |
| A J P Air Conditioning Services Limited | Stafford | 2012 |
| A J P Composites Ltd | Ventnor | 2018 |
| A J Palmer (Welding and Fabrications) Limited | Finchley | 2004 |
| A J Plant & Commercial Ltd | Hereford | 2025 |
| A J Poole Silverware Limited | Birmingham | 2009 |
| A J Print & Promotional Services Ltd | Chinnor | 2020 |
| A J R Precision Plastics Limited | Birmingham | 1986 |
| A J Rail Limited | Horley | 2002 |
| A J Richards Services Limited | Port Talbot | 2023 |
| A J Roberts Installation Ltd | Norwich | 2024 |
| A J Roller Shutter Doors Limited | Merthyr Tydfil | 2018 |
| A J Ross Limited | Hassocks | 2003 |
| A J S Metals Limited | Willenhall | 1994 |
| A J Sofas Ltd | Birmingham | 2023 |
| A J Steel Works Ltd | Barking | 2017 |
| A J T Carpenters Ltd | Yatton Bristol | 2014 |
| A J T Crane Services Ltd | Tamworth | 2017 |
| A J Thompson Ltd | Moreton-In-Marsh | 2026 |
| A J Trailer Maintenance Limited | Bury St Edmunds | 2008 |
| A J Transmissions & Conveyors Limited | Glasgow | 1997 |
| A J Tyres Ltd | Doncaster | 2013 |
| A J Ventilation Services Ltd | Coatbridge | 2022 |
| A J W Construction Limited | Lymington | 1995 |
| A J W Fabrications Limited | Wisbech | 2017 |
| A Jackson Interiors Limited | Doncaster | 2018 |
| A Jayne Engineering Ltd | Ross-On-Wye | 2024 |
| A Jennings Carpentry Limited | Leigh-On-Sea | 2023 |
| A Jhutti Ltd | Coventry | 2019 |
| A Jones Aircraft Maintenance Services Ltd | South Shields | 2022 |
| A Joyce Services Ltd | London | 2021 |
| A Jupp & SON Limited | Lewes | 2004 |
| A K Carpentry Ltd | Plymouth | 2022 |
| A K Engineering CNC Maintenance Limited | Skelmorlie | 2016 |
| A K Industries Holdings Limited | Hereford | 2013 |
| A K Industries Limited | Hereford | 1995 |
| A K L Plant Services Limited | Addlestone | 2005 |
| A K Precision Engineering Limited | Southampton | 2007 |
| A K Sheet Metal Fabrications Limited | Hessle | 1997 |
| A K Steel Services Limited | Gravesend | 2021 |
| A K Tera Tech Limited | Aylesbury | 2014 |
| A K W Engineering Limited | Leeds | 2016 |
| A Kahn Design Limited | Bradford | 1998 |
| A Khalid Ltd | Manchester | 2014 |
| A Kiss From a Goddess Limited | Pontefract | 2018 |
| A Kunjasic Pipework Ltd | Eastcote | 2018 |
| A L Alison Ltd | London | 2018 |
| A L Challis Limited | Salisbury | 2002 |
| A L D Lighting Limited | East Sussex | 2007 |
| A L D Print Limited | Sheffield | 2009 |
| A L H Systems Limited | Westbury | 1976 |
| A L K S Limited | Margate | 2002 |
| A L Machine Tools Ltd | Birmingham | 2006 |
| A L Metal Fabrications Limited | Chesterfield | 2021 |
| A L Site Services Ltd | Bromsgrove | 2020 |
| A L T Mobile Mechanic Limited | Norwich | 2026 |
| A L'Aise Limited | Bath | 2015 |
| A LA Carp Ltd | Eye | 2019 |
| A LA Carte Limited | Dudley | 1998 |
| A Laverack & SON Ltd | York | 2014 |
| A Leap of Leopards Limited | London | 2016 |
| A LEE Setting Limited | Harlow | 2012 |
| A Little Bird Collective Ltd | Bushey | 2021 |
| A Little BIT Food Company Limited | Staple | 2014 |
| A Little BIT Interesting Ltd | Watchet | 2021 |
| A Little Joiners Shop Limited | Stalybridge | 2021 |
| A Littlejohn Limited | Bath | 1995 |
| A Living Thing Ltd. | York | 2024 |
| A Lizt Ltd | Newcastle Upon Tyne | 2025 |
| A Local Printer Limited | Storrington | 1981 |
| A Loving Tribute Ltd | Horsham | 2018 |
| A LUX Detailing Ltd | London | 2024 |