| AJC Johnson Controls Limited | Chelmsford | 1936 |
| AJC Joinery Limited | Heckmondwike | 2022 |
| AJC Joinery Workshops Limited | Aberdeen | 2021 |
| AJC Pipework Services Limited | Tipton | 2018 |
| AJC Racing Limited | London | 2000 |
| AJC RAW Ltd | Houghton Le Spring | 2024 |
| AJC Renewables Ltd | Sunderland | 2025 |
| Ajcm Marine Design Services Limited | Helensburgh | 2012 |
| Ajctec Ltd | Larbert | 2023 |
| AJD Access Limited | Wolverhampton | 2014 |
| AJD Developments Limited | Liverpool | 2025 |
| AJD Electrical and PAT Testing Services Ltd | Nottingham | 2015 |
| AJD Electrics Ltd | Coventry | 2017 |
| AJD Foundries Limited | Cradley Heath | 2024 |
| AJD Furniture Ltd | London | 2019 |
| AJD Security Limited | Wakefield | 2008 |
| AJE Mechanical Repairs and Solutions Limited | Colchester | 2024 |
| Ajea Products Limited | Cookstown | 2012 |
| Ajeet Media Limited | Southall | 2011 |
| Ajemiri Neurotech Ltd | Leicester | 2025 |
| Ajene Productions Ltd | Birmingham | 2022 |
| AJF Engineering Limited | Billingham | 2018 |
| AJF Engineering Services Ltd | Horncastle | 2023 |
| AJF Site Services Ltd | Attleborough | 2010 |
| AJF Technical Services Limited | West Midlands | 2014 |
| AJG Aviation Ltd | Westerham | 2023 |
| AJG Services Ltd | Newport | 2022 |
| AJG Trading (Lockerbie) Limited | Dumfries | 2024 |
| AJG Welding Ltd | Brighton | 2023 |
| AJH Aerotech Limited | Bristol | 2017 |
| AJH Electrical Services Leicester Ltd | Leicester | 2020 |
| AJH Fabrications Limited | Church Road Wombourne | 1999 |
| AJH Joinery (MCR) Limited | Altrincham | 2022 |
| AJH LED Lighting Ltd | Castleford | 2021 |
| AJH Pump Supply & Repair Limited | Wakefield | 2009 |
| AJH Synth Limited | Stockton-On-Tees | 2021 |
| Ajit Bedroom & Kitchen Ltd | Hayes | 2021 |
| Ajiwa Limited | Salford | 2025 |
| AJJ Fire Limited | Wrexham Technology Park | 2024 |
| AJJ Welding and Fabrication Ltd | Southampton | 2022 |
| Ajjis Ghee Ltd | London | 2026 |
| AJK Contracts Ltd | Iver | 2021 |
| AJK Fine Jewels Limited | London | 2025 |
| AJK Glazing Ltd | Birmingham | 2015 |
| AJK Partners Ltd | West Molesey | 2025 |
| AJK Rail Limited | Darlington | 2024 |
| AJK Trucks & BUS Ltd | Grays | 2020 |
| AJK Welding Ltd | Alloa | 2022 |
| AJL (UK) Limited | Bootle | 2014 |
| AJL Group Holdings Ltd | King'S Lynn | 2018 |
| AJL Print Management Ltd | Sutton Coldfield | 2007 |
| AJL Projects Ltd | Chichester | 2020 |
| AJM & Co UK Limited | Wolverhampton | 2019 |
| AJM 3D Printing Ltd | London | 2025 |
| AJM Bespoke Metal Work Ltd | Warwick | 2021 |
| AJM Brands Ltd | Oldham | 2025 |
| AJM Composites Ltd | Southampton | 2019 |
| AJM Controls & Automation Limited | Kempston | 2009 |
| AJM Drives & Controls Ltd | Huddersfield | 2005 |
| AJM Electrical Services Ltd | Ashford | 2016 |
| AJM Electrical Testing Services Limited | Hartlepool | 2005 |
| AJM Embroidery and Print Limited | Newport | 2019 |
| AJM Engineering (N.I.) Ltd | Banbridge | 2024 |
| AJM Global Trading Ltd | Cambridge | 2024 |
| AJM Group Solutions Limited | Aylesford | 2016 |
| AJM Jewellery Ltd | Maidstone | 2023 |
| AJM Mech Ltd | Wigan | 2026 |
| AJM Technologies Ltd | Wellingborough | 2024 |
| AJM Timber Products Ltd | Belleek | 2021 |
| Ajmal Perfume (UK) Limited | Oxted | 1997 |
| Ajme Limited | Cleethorpes | 2014 |
| AJN Farriery Limited | New Barnetby | 2015 |
| AJN International Group Limited | London | 2022 |
| AJN Student Properties Ltd. | Milton Keynes | 2015 |
| AJO Creations Ltd | Norwich | 2026 |
| AJO Designs Limited | Spalding | 2017 |
| AJO Engineering Ltd | Manchester | 2021 |
| Ajorya Cosmetic Co., Ltd | London | 2025 |
| Ajosepo Limited | London | 2024 |
| Ajoto Limited | Manchester | 2011 |
| AJP 2021 Ltd | Ross-Shire | 2021 |
| AJP Air Conditioning Limited | Hemel Hempstead | 2023 |
| AJP Carpentry Limited | Northampton | 2023 |
| AJP Engineering Limited | Lancashire | 2002 |
| AJP Fabrications Ltd | Bradford | 2023 |
| AJP Stainless Ltd | Hereford | 2017 |
| Ajpatterson Limited | Harrow | 2000 |
| AJR Fabrications Ltd | Stalybridge | 2017 |
| AJR Engineering Ltd | Huddersfield | 2007 |
| AJR Holdings Limited | Stoke On Trent | 2000 |
| AJR Multi Trade Ltd | Telford | 2022 |
| AJR Rustics Limited | Ellesmere | 2019 |
| AJS & Daughter Limited | Darlington | 2014 |
| AJS Aircraft Services Ltd | St. Helens | 2025 |
| AJS Aromas Ltd | Harrow | 2020 |
| AJS Aviation Limited | Milton Keynes | 2008 |
| AJS Coffee Limited | Hastings | 2023 |
| AJS Composites Ltd | Bridlington | 2021 |
| AJS Contracts Ltd | Belfast | 2024 |
| AJS Creations Ltd | Stoke-On-Trent | 2026 |