| Aiy-Stat Sciences Ltd. | 1St Floor North Westgate House | 2015 |
| Aiya Bureau Ltd | London | 2026 |
| Aiya Studio Ltd | London | 2017 |
| Aiyah Ltd | London | 2021 |
| Aiyla Consultancy Services Limited | Stoke-On-Trent | 2024 |
| Aiym Group Ltd | Ilford | 2019 |
| Aiyne Limited | London | 2014 |
| Aizal GBR Ltd | Bury | 2023 |
| Aizanoi Consulting Ltd | London | 2022 |
| Aizelax Limited | Swansea | 2024 |
| Aizer Design Studio Ltd | London | 2019 |
| Aizeso Consultant Engineering Ltd | London | 2026 |
| Aizio Associates Ltd | Nottingham | 2017 |
| Aizome Limited | Preston | 2018 |
| AJ & AJ Consulting Limited | Stratford-Upon-Avon | 2014 |
| AJ & Co Interior Design Ltd | Southport | 2019 |
| AJ & Co Property Limited | London | 2025 |
| AJ & H Ltd | Altrincham | 2022 |
| AJ & LE Wilson Consulting Limited | Southwell | 2016 |
| AJ & LVJ Consulting Services Ltd | Brough | 2026 |
| AJ & P Services Limited | Wandsworth | 2015 |
| AJ & T Holdings Ltd | Redditch | 2026 |
| AJ & WS Millis Technical Services Ltd | Lichfield | 2022 |
| AJ + 2 Limited | Ely | 2008 |
| AJ 19 Design Limited | Leeds | 2025 |
| AJ Abella Consulting Ltd | London | 2025 |
| AJ ACC Limited | Manchester | 2026 |
| AJ Accountancy Limited | Llandrindod Wells | 1996 |
| AJ Accountancy Services Ltd | Blackburn | 2022 |
| AJ Accountants & Tax Consultants Ltd | Milton Keynes | 2017 |
| AJ Accountants Limited | Ilford | 2009 |
| AJ Accounting & Tax Services Ltd | London | 2021 |
| AJ Accounting and Tax Limited | Feltham | 2020 |
| AJ Accounting Limited | Gravesend | 2025 |
| AJ Accounts and Taxation Limited | Chatham | 2012 |
| AJ Accounts Ltd | Shipley | 2023 |
| AJ Acoustics Limited | Eastbourne | 2020 |
| AJ Advisory Limited | Chislehurst | 2013 |
| AJ Affiliates Ltd | Northampton | 2024 |
| AJ Agency Limited | Manchester | 2023 |
| AJ and C General Services Ltd | Croydon | 2024 |
| AJ Angelo George Law Ltd | Waltham Cross | 2018 |
| AJ Archistudio Ltd | London | 2018 |
| AJ Architects Limited | Cheltenham | 2011 |
| AJ Architectural Ltd | Southport | 2019 |
| AJ Audit & Accounting Ltd | London | 2022 |
| AJ Barnes Financial Planning Ltd | Altrincham | 2018 |
| AJ Beattie Limited | Woking | 2014 |
| AJ Bell PLC | Salford Quays | 2002 |
| AJ Berkshire Ltd | Slough | 2023 |
| AJ Bicknell Solutions Ltd | Pinner | 2023 |
| AJ Birney Services Limited | Beckenham | 2013 |
| AJ Blueprints Ltd | Chelmsford | 2024 |
| AJ Bookkeeping Services Ltd | Reigate | 2023 |
| AJ Bowker Investments Ltd | Wilmslow | 2023 |
| AJ Boyd Performance Ltd | South Queensferry | 2025 |
| AJ Bradley & Co. Ltd | Glasgow | 2019 |
| AJ Brewer Associates Limited | Bromsgrove | 2016 |
| AJ Brown Financial Planning Ltd | Chester | 2010 |
| AJ Business Accounting Ltd | Milverton | 2015 |
| AJ Business Advisory Services Ltd | Bristol | 2018 |
| AJ Business Consultancy Ltd | Bexley | 2019 |
| AJ Business Consulting Ltd | Cardiff | 2023 |
| AJ Business Services Ltd | Melrose | 2019 |
| AJ Calvert Limited | Adderbury | 2014 |
| AJ Campbell Legal Limited | Loughton | 2020 |
| AJ Capital Partners Limited | London | 2018 |
| AJ Casey Ltd | Enfield | 2018 |
| AJ Chapman Consultancy Limited | Banstead | 2023 |
| AJ Chef Consultant Ltd | Aylesbury | 2026 |
| AJ Chorley Services Limited | Chorley | 2014 |
| AJ Clark Commercial Services Limited | Westerham | 2026 |
| AJ Clarke Accounting Ltd | Keighley | 2012 |
| AJ Clint Consulting Ltd | Reading | 2023 |
| AJ Collins Associates Limited | Huddersfield | 2013 |
| AJ Commercial Services Limited | Grays | 2026 |
| AJ Commissioning Services Limited | Chorley | 2017 |
| AJ Consult Ltd | North Ferriby | 2024 |
| AJ Consultancy (Cheltenham) Limited | Cheltenham | 2025 |
| AJ Consultancy Birmingham Ltd | Birmingham | 2024 |
| AJ Consultancy Services (UK) Limited | Harrow | 2014 |
| AJ Consultant Design Engineer Limited | Mytchett | 2001 |
| AJ Consultants and Bookkeepers Limited | Basildon | 2020 |
| AJ Consultants Connect Ltd | Merthyr Tydfil | 2025 |
| AJ Consulting & Training Ltd. | Melton Mowbray | 2016 |
| AJ Consulting (Chester) Ltd | Chester | 2017 |
| AJ Consulting (Oxon) Ltd | Aylesbury | 2022 |
| AJ Consulting IMS Ltd | Rugby | 2023 |
| AJ Consulting Solutions Limited | Swindon | 2024 |
| AJ Consurvices Limited | Eastleigh | 2022 |
| AJ Controls & Valuation Services Ltd | Southend On Sea | 2013 |
| AJ Cotswolds Consulting Ltd | Moreton-In-Marsh | 2026 |
| AJ Davies Advisory Limited | Cannock | 2026 |
| AJ Design Consultancy Ltd | Larne | 2024 |
| AJ Design Dynamics Limited | Warrington | 2023 |
| AJ Design Firm Ltd | Greenford | 2024 |
| AJ Design Group Ltd | Carluke | 2021 |
| AJ Design Interiors Limited | Telford | 2024 |
| AJ Design Services Ltd | Haverhill | 2022 |
| AJ Dickinson Consulting Ltd | Harrogate | 2026 |