| AJ Automation Services Ltd | Kidderminster | 2025 |
| AJ Avionics Ltd | Milton Keynes | 2026 |
| AJ Building Contractors Ltd | Great Yarmouth | 2026 |
| AJ Carpentry & Joinery Ltd | Gloucester | 2025 |
| AJ Carter Organ Builder Ltd | Wakefield | 2011 |
| AJ Catering Engineers Ltd | Rainham | 2019 |
| AJ Commercial Manufacture Ltd | Birmingham | 2025 |
| AJ Contract Maintenance Limited | Ashby-De-La-Zouch | 2023 |
| AJ Cushions Ltd | Daventry | 2025 |
| AJ Domestic Appliances Limited | Wellington | 2002 |
| AJ Dynamics Limited | Blackpool | 2015 |
| AJ Elec Limited | Bridgend | 2026 |
| AJ Electric Gates and Automation Ltd | Weston-Super-Mare | 2016 |
| AJ Engineering & Construction Services Limited | Glasgow | 1998 |
| AJ Engineering (NW) Ltd | Lancaster | 2004 |
| AJ Engineering Services Limited | Openshaw | 2004 |
| AJ Engineering Solutions Ltd | Bristol | 2018 |
| AJ Engineerservice Ltd | March | 2025 |
| AJ Facades Ltd | West Bromwich | 2018 |
| AJ Firewood Limited | Pontypool | 2014 |
| AJ Fleet Services Ltd | Leicester | 2026 |
| AJ Foam Ltd | Batley | 2006 |
| AJ Food Brands Ltd | London | 2026 |
| AJ Food Packers Ltd | Birmingham | 2022 |
| AJ Foster Editorial Services Limited | Southsea | 2021 |
| AJ Fresh Foods Limited | Newry | 2020 |
| AJ Gold Factory Ltd | Redhill | 2023 |
| AJ Golden Crust Bakery Ltd | Bradford | 2025 |
| AJ Haulage & Plant Hire Limited | Londonderry | 2023 |
| AJ Hitch & Co Limited | Northwich | 2018 |
| AJ Homemade Foods Ltd | Hamilton | 2025 |
| AJ Implant and Prosthetics Dental LAB Ltd | Hamilton | 2024 |
| AJ Industrial Doors Ltd. | Wishaw | 2015 |
| AJ Installation Team Ltd | Leighton Buzzard | 2017 |
| AJ International Events Limited | Leeds | 2024 |
| AJ Kirkham Services Ltd | Tipton | 2025 |
| AJ Manufacturing Ltd | Wilberfoss | 2021 |
| AJ Marine Services Ltd | Southampton | 2023 |
| AJ Mcewan Horsham Ltd | Horsham | 2016 |
| AJ Mcewan Ltd | Horsham | 2025 |
| AJ Media Associates Ltd | Hoddesdon | 2010 |
| AJ Media Services Ltd | Bradford | 2023 |
| AJ Mitchell Limited | North Berwick | 2015 |
| AJ On-Site Solutions Ltd | Oldham | 2026 |
| AJ PAT Testing & Handyman Services Limited | London | 2021 |
| AJ Plates Ltd | Darlington | 2024 |
| AJ Print & Embroidery Limited | Lisburn | 2023 |
| AJ Recycling Midlands Ltd | Birmingham | 2020 |
| AJ Reid Ltd. | Muir Of Ord | 2001 |
| AJ Services & Trading Limited | Stanmore | 2019 |
| AJ Services Brickcutters Ltd | Pulborough | 2011 |
| AJ Shaw Global Ltd | Newcastle Upon Tyne | 2024 |
| AJ Shikder International Trading Limited | Cardiff | 2025 |
| AJ Shoreprint Limited | Brighton | 2002 |
| AJ Sofa & Beds Ltd | Batley | 2025 |
| AJ Steels and Fabrication Ltd | Feltham | 2020 |
| AJ Tank Company Ltd | South Ockendon | 2020 |
| AJ Tensile Manufacturing Limited | Portskewett | 2016 |
| AJ Thin Films Consultancy Limited | Newton Abbot | 2009 |
| AJ Timbercraft Ltd | Gloucester | 2024 |
| AJ Weld Ltd | Laindon | 2024 |
| AJ Wellness Club Naturals Limited | Elmstead Market | 2025 |
| AJ Windows (Bristol) Limited | Bristol | 2022 |
| AJ Yacht Detailing Ltd | Inverkip | 2022 |
| AJ6 Sports Ltd | Keighley | 2022 |
| AJA Fabrications Ltd | Brighton | 2009 |
| AJA Healthcare Ltd | Solihull | 2021 |
| AJA Welding Services Ltd | Inverurie | 2022 |
| Ajac Engineering Limited | Andover | 2021 |
| Ajaero Limited | Swindon | 2012 |
| Ajas Services Limited | Sheffield | 2018 |
| Ajatar Ltd | Maidstone | 2024 |
| Ajautomate Ltd | Leigh | 2011 |
| Ajaw Solutions Ltd | Bonar Bridge | 2013 |
| Ajax Equipment Holdings Limited | Bolton | 2003 |
| Ajax Equipment Limited | Bolton | 1970 |
| Ajax Machine Tools International Ltd | Lymington | 2009 |
| Ajax Minerva Limited | West Yorkshire | 1975 |
| Ajax Tocco International Limited | Saltley | 1992 |
| Ajay Consultancy Limited | Birmingham | 2003 |
| Ajay Electronics Limited | Sutton | 1976 |
| Ajay Jewellers Ltd | | 1999 |
| AJB Aviation Services Limited | Glasgow | 2020 |
| AJB Carpentry Limited | Portsmouth | 2017 |
| AJB Creative Solutions Limited | Telford | 2021 |
| AJB Electrical Contracting Ltd | Thatcham | 2011 |
| AJB Foams Limited | Dudley | 2012 |
| AJB Group (Carpentry) Ltd | Spalding | 2021 |
| AJB Joinery & Building Ltd | Leeds | 2025 |
| AJB Joinery Limited | Halesowen | 2015 |
| AJB Joinery Services Ltd | Malvern | 2004 |
| AJB Rail Product Services Limited | Wolverhampton | 2016 |
| AJB Rectifiers & Controls Ltd | Pontefract | 2001 |
| Ajbr Ltd | Wolverhampton | 2017 |
| AJC Conversions Ltd | Glossop | 2014 |
| AJC Dance Designs Ltd | Belfast | 2018 |
| AJC Electrical Installation and Maintenance Ltd | Widnes | 2025 |
| AJC Electrical Services (Oakhill) Ltd | Stoke On Trent | 2023 |
| AJC Homes Scotland Limited | London | 1998 |
| AJC Interiors (London) Limited | Milton Keynes | 2019 |