| AJ Safe Guard Limited | Chelmsford | 2025 |
| AJ Scho Ltd | London | 2025 |
| AJ Scientific Ltd | Bucks | 2006 |
| AJ SCM Consultant Ltd | Chester Le Street | 2024 |
| AJ Scott Enterprises Ltd | Camberley | 2017 |
| AJ Sears Advisory & Consultancy Limited | Chelmsford | 2025 |
| AJ Services ENG Limited | Leicester | 2014 |
| AJ Services Engineering Limited | Newark | 2020 |
| AJ SHE Consultancy Ltd | Sutton Coldfield | 2024 |
| AJ Sheen Consulting Limited | Woking | 2019 |
| AJ Simpson Engineering Limited | Ayrshire | 2015 |
| AJ Singer Consultancy Ltd | Stamford | 2017 |
| AJ Site Engineering Limited | Liverpool | 2009 |
| AJ Site Services Limited | Durham | 2025 |
| AJ Siting Ltd | Exmouth | 2025 |
| AJ Slater Holdings Limited | London | 2023 |
| AJ Social Media Ltd | London | 2024 |
| AJ Spinks Ltd | Fleet | 2016 |
| AJ Squared Ltd | Epsom | 2021 |
| AJ Star Consultancy Limited | Sittingbourne | 2025 |
| AJ Statistics Ltd | Winchester | 2018 |
| AJ Stephenson Ltd | Bath | 2022 |
| AJ Sterling Solicitors Ltd | London | 2026 |
| AJ Stress Consultancy Limited | Bristol | 2007 |
| AJ Supernova Limited | Caterham | 2022 |
| AJ Support Services Limited | Cirencester | 2014 |
| AJ Technical Ltd | Glenrothes | 2026 |
| AJ Technical Training Limited | Carlisle | 2017 |
| AJ Tensile Group Limited | Portskewett | 2015 |
| AJ Thirteen Limited | Norwich | 2018 |
| AJ Total Sourcing Ltd | Newport | 2025 |
| AJ Trading Group Ltd | Norwich | 2020 |
| AJ Training and Development Ltd | Maidenhead | 2022 |
| AJ UK Services Ltd | Wigan | 2024 |
| AJ Varey Consulting Limited | Derby | 2022 |
| AJ Vince Limited | Redhill | 2022 |
| AJ Vision Ltd | Leicester | 2024 |
| AJ Ward Ltd | Wokingham | 2026 |
| AJ Warner Holdings Ltd | Malvern | 2025 |
| AJ Watson (Bidford) Limited | Alcester | 2026 |
| AJ West Consulting Limited | Lutterworth | 2024 |
| AJ White PPM Professional Ltd | Basildon | 2022 |
| AJ Wilks Environmental Health Consultancy Limited | Lutterworth | 2019 |
| AJ Williams Property Ltd | Liverpool | 2021 |
| AJ Wind Consultancy Ltd | London | 2025 |
| AJ Winter Consulting Limited | Wallington | 2025 |
| AJ Wood Tech Ltd | Southend-On-Sea | 2025 |
| AJ Wootton Design Ltd | Shoreham-By-Sea | 2014 |
| AJ World Consultancy Limited | Leeds | 2016 |
| AJ Wright Associates Limited | Birmingham | 2020 |
| AJ Wylde Consulting Ltd | North Shields | 2025 |
| Aj&C Limited | Colchester | 2026 |
| Aj&Co Limited | Aberdeen | 2012 |
| Aj's Studios Limited | Epsom | 2009 |
| Aj-B Accountancy Limited | Brackley | 2015 |
| Aj-Surveyors Limited | Barnoldswick | 2024 |
| AJ100 Limited | Northampton | 2015 |
| AJ23 Advisory Ltd | London | 2026 |
| AJ23 Solutions Limited | Cheadle Hulme | 2024 |
| AJ2M Limited | South Petherton | 2003 |
| AJ3Z Legal Services Ltd | Luton | 2026 |
| AJ4SN Ltd | Woodford Green | 2016 |
| AJA & Associates Ltd | Waterlooville | 2020 |
| AJA Advisory Limited | Inverness | 2023 |
| AJA Architects Consulting Limited | Coventry | 2017 |
| AJA Business Consulting Limited | Solihull | 2012 |
| AJA Business Services Limited | Macclesfield | 1995 |
| AJA Capital Ltd | Ilford | 2023 |
| AJA Construction Consultants Ltd | Hull | 2016 |
| AJA Consulting Services Ltd | Bolton | 2025 |
| AJA Corp Ltd | London | 2023 |
| AJA Engineering Consultants Ltd. | Brabourne Lees | 2013 |
| AJA Engineering Limited | North Shields | 2017 |
| AJA Engineering Services Ltd | Crieff | 2019 |
| AJA Engineering, Biotech, Research & Development Ltd | London | 2021 |
| AJA Legal Services Ltd | Orpington | 2006 |
| AJA Marketing Limited | London | 2025 |
| AJA Media Solutions Limited | | 2006 |
| AJA Services Limited | Runcorn | 2026 |
| AJA Skills Assessment Ltd | Rickmansworth | 2026 |
| AJA Subsea Ltd | London | 2015 |
| AJA Total Consulting Limited | Barnsley | 2024 |
| AJA Turner Ltd | Dunbar | 2022 |
| AJA Whittaker Ltd | Liphook | 2017 |
| Ajabu Consultancy Ltd | London | 2023 |
| Ajac Ltd | London | 2019 |
| Ajacent Ltd | Leicester | 2019 |
| Ajacia Limited | London | 2023 |
| Ajaco Engineering Limited | Ayr | 2020 |
| Ajad Ltd | Stanmore | 2026 |
| Ajags International Limited | Mildenhall | 2008 |
| Ajah Consulting Limited | London | 2023 |
| Ajahn Solutions Limited | London | 2007 |
| Ajai App Ltd | South Queensferry | 2022 |
| Ajaj Ltd | Sutton | 2017 |
| Ajak Solutions Ltd | Romford | 2020 |
| Ajaknox Limited | Enfield | 2024 |
| Ajal Supply Chain Consultants Ltd | Glasgow | 2024 |
| Ajala & VON Ancken Legal Services Ltd | London | 2019 |
| Ajam Consultancy Ltd | St. Helens | 2026 |