| Aegis Legal Services Limited | Harlow | 2025 |
| Aegis Management Services Limited | Witney | 2003 |
| Aegis Management Systems Ltd | Biggleswade | 2021 |
| Aegis PAY Ltd | Cardiff | 2025 |
| Aegis People Limited | Nottingham | 2019 |
| Aegis Privacy Consulting Limited | Cardiff | 2016 |
| Aegis Private Health Consultant Limited | Wigan | 2025 |
| Aegis Project Partners Limited | Lower Boddington | 2017 |
| Aegis Property Consultancy Limited | Wakefield | 2009 |
| Aegis Public Services Limited | Birmingham | 2026 |
| Aegis RDA Ltd | Belfast | 2025 |
| Aegis Regulatory Advisors Ltd | Bolton | 2026 |
| Aegis Renewable Services Ltd | Llandudno Junction | 2019 |
| Aegis Safety Consulting Ltd | Waterlooville | 2025 |
| Aegis Services Holdings Limited | Batley | 2026 |
| Aegis Services Limited | Batley | 1989 |
| Aegis Solutions Group UK Ltd | Clitheroe | 2021 |
| Aegis Specialist Services Ltd | Liverpool | 2026 |
| Aegis Transport Compliance Limited | Bromborough | 2026 |
| Aegis Tributum Ltd | Edinburgh | 2018 |
| Aegis Trinity Ltd | London | 2026 |
| Aegis Vigil Ltd | London | 2026 |
| Aegis Wills Limited | East Grinstead | 2004 |
| AEGIS1 Holdings Ltd | Marlborough | 2025 |
| Aegisone Ltd | London | 2024 |
| Aegispro Solutions Limited | Belfast | 2025 |
| Aegisworks Limited | Durham | 2020 |
| Aegle Consultancy Ltd | Aylesbury | 2023 |
| Aegle Consulting Limited | High Wycombe | 2019 |
| Aegle Ltd | London | 2024 |
| Aegle Systems Limited | Coventry | 2025 |
| Aegleio Limited | Leicester | 2015 |
| Aegleteq Limited | | 2004 |
| Aeglobal Ltd | London | 2019 |
| Aeglos Ltd | Golders Green | 2001 |
| Aeglos Strategy Limited | London | 2025 |
| Aegm Ltd | Cardiff | 2024 |
| Aegon Asset Management UK Holdings Limited | Edinburgh | 2009 |
| Aegon UK PLC | London | 1998 |
| Aegys Ltd | Aberdeen | 2024 |
| AEH Accountancy Ltd | Rugby | 2005 |
| AEH Advisory Limited | Wakefield | 2022 |
| AEH Auditing Limited | Loughborough | 2025 |
| AEH Consulting Ltd | London | 2026 |
| AEH Holdings Limited | Liverpool | 2015 |
| AEH Innovative Hydrogel Ltd | Bolton | 2018 |
| AEH London Ltd | London | 2019 |
| AEI Air (Holdings) Limited | Uxbridge | 2010 |
| AEI Architecture Ltd | Warrington | 2022 |
| AEI Connect Limited | London | 2025 |
| AEI Distribution Plus Limited | London | 2025 |
| AEI Financial Limited | Wadhurst | 2022 |
| AEI Management Limited | London | 2025 |
| AEI Services Ltd | Stockport | 2024 |
| AEI Ventures Limited | London | 2008 |
| Aeig (UK) Ltd | Belfast | 2021 |
| Aeig Compressed Air Specialists Limited | Newry | 2025 |
| Aeig Scotland Limited | East Kilbride | 2024 |
| Aeirtec Ltd | North Shields | 2003 |
| Aeism Agency Limited | Milton Keynes | 2020 |
| AEJ Construction Services Ltd | Bangor | 2019 |
| AEJ Consulting Engineers Ltd | Witney | 2025 |
| AEJ Education Consultancy Ltd | Preston | 2019 |
| AEJ Holdings Limited | Leicester | 2019 |
| AEJ Legal Consultancy Ltd | London | 2022 |
| AEJ Pro Ltd | Altrincham | 2023 |
| AEJ Solutions Ltd | London | 2013 |
| Aejj Engineering Ltd. | London | 2024 |
| AEK Accountancy Ltd | Bognor Regis | 2025 |
| AEK Building Services Ltd | North Harrow | 2015 |
| AEK Controls Limited | Belfast | 2022 |
| AEK Health Ltd | Enfield | 2025 |
| Aekay 8 Limited | Coventry | 2020 |
| AEL (Scarborough) Ltd | Scarborough | 2007 |
| AEL Consult Ltd | Maghera | 2022 |
| AEL Consulting Limited | Chelmsford | 1999 |
| AEL Holdings Limited | Inverurie | 2008 |
| AEL Management Limited | London | 2026 |
| AEL Markhams Ltd | London | 2010 |
| AEL Music Ltd | Newcastle Upon Tyne | 2026 |
| AEL Realisations Limited | Cheltenham Gloucestershire | 1975 |
| Aela Photography Ltd | Motherwell | 2026 |
| Aela Therapeutics Ltd | London | 2025 |
| Aelan Consulting Ltd | London | 2024 |
| Aeldah Ltd | Middlesex, Hatch End | 2026 |
| Aelecto Limited | St. Neots | 2005 |
| Aeleus Limited | Farnborough | 2004 |
| Aelf Engineering Ltd. | Bristol | 2012 |
| Aelfgar Surgery GPF Limited | Rugeley | 2013 |
| Aelfreda Ltd | Alton | 2021 |
| Aelio Limited | London | 2018 |
| Aelius Biotech Limited | Newcastle Upon Tyne | 2018 |
| Aelkemi Limited | London | 2013 |
| Aella Cora Limited | Leatherhead | 2021 |
| Aelmas Ltd | London | 2026 |
| Aelmid Engineering Limited | Oundle | 2020 |
| Aelmon. Construction Solutions Ltd. | Glasgow | 2015 |
| Aelon Life Sciences Ltd | East Dulwich | 2022 |
| Aelora Limited | Cambridge | 2025 |
| Aelred Consulting Limited | Peterborough | 2011 |