| Aepex Engineering Limited | Rotherham | 2022 |
| Aepex Insights Ltd | Doncaster | 2026 |
| Aepstudios Limited | London | 2023 |
| Aeqos Consulting Ltd | London | 2005 |
| Aeqos Quality Management Ltd | London | 2006 |
| Aequa Limited | Glasgow | 2021 |
| Aequa Nanotherapeutics Ltd | London | 2026 |
| Aequalis Accountancy Limited | Cardiff | 2021 |
| Aequalis Accounting Ltd | Basildon | 2019 |
| Aequalis Limited | Cardiff | 2018 |
| Aequalis Management Limited | Preston | 2022 |
| Aequalis Partners Limited | Berwick-Upon-Tweed | 2016 |
| Aequalis Verde Limited | High Wycombe | 2015 |
| Aequator Capital Limited | London | 2009 |
| Aequiam Limited | Leighton Buzzard | 2012 |
| Aequim Alternative Investments UK Limited | London | 2026 |
| Aequissim Ltd | London | 2010 |
| Aequitas Accountants Ltd | Pinner | 2012 |
| Aequitas Advisory Ltd. | Nottingham | 2021 |
| Aequitas Associates Limited | Bedford | 2017 |
| Aequitas Black Limited | Stirling | 2025 |
| Aequitas Capital Limited | Harpenden | 2026 |
| Aequitas Consultancy Ltd | Lancing | 2025 |
| Aequitas Corporate Finance Limited | Edinburgh | 2002 |
| Aequitas Expert Witness Services Ltd | Manchester | 2015 |
| Aequitas Group Ltd | London | 2019 |
| Aequitas HR & Learning Services Ltd | London | 2012 |
| Aequitas Immigration Law Firm Ltd | Coventry | 2014 |
| Aequitas Legal (Recovery) Limited | Manchester | 2023 |
| Aequitas Legal Solicitors Limited | Manchester | 2014 |
| Aequitas Limited | Hailsham | 2006 |
| Aequitas Management Solution (UK) Limited | Harrow | 2026 |
| Aequitas Mediation UK Ltd | Malvern | 2024 |
| Aequitas Seed Analytics (Aseeda) Limited | London | 2015 |
| Aequitas Solicitors Limited | Leeds | 2024 |
| Aequitas Talent Services Ltd | East Molesey | 2022 |
| Aequitas Wealth Management Limited | Walsall | 2021 |
| Aequl Ltd | Reading | 2025 |
| Aequo Advisors Ltd | Buckie | 2022 |
| Aequo Consulting Ltd | London | 2016 |
| Aequor Project Services Limited | Lytham St.Annes | 2019 |
| Aequorea Ltd | Camborne | 2016 |
| Aequum Surveying and Engineering Limited | Cullompton | 2020 |
| Aequus Currency Consultants Limited | London | 2021 |
| Aequus Financial Limited | Tonbridge | 2016 |
| Aequus Solicitors Ltd | Wolverhampton | 2020 |
| Aeqvitas Ltd | London | 2026 |
| AER Accountants Limited | Blackburn | 2018 |
| AER Alpha Ltd | Redruth | 2021 |
| AER Beatha Limited | London | 2015 |
| AER Data and Technical Services Ltd | Woodbridge | 2026 |
| AER Digital Ltd | Twickenham | 2024 |
| AER Project Resource Limited | Middlesbrough | 2023 |
| AER Project Services Limited | Middlesbrough | 2018 |
| AER Quality Limited | Newcastle | 2011 |
| AER Testing Solutions Limited | Altrincham | 2022 |
| AER Training Limited | Hoddesdon | 2011 |
| AER Ventures Ltd | Godalming | 2014 |
| AER8 Marketing Limited | York | 2011 |
| Aera Advisory Limited | Wishaw | 2026 |
| Aera Elevation Ltd | London | 2026 |
| Aera Group Limited | London | 2020 |
| Aera House Ltd | London | 2026 |
| Aeralis Ltd | London | 2015 |
| Aeralung Technologies Ltd | Bootle | 2026 |
| Aerarium Global Ltd | Twickenham | 2025 |
| Aeration Innovations Ltd | Haywards Heath | 2026 |
| Aerbio UK Ltd | Birmingham | 2024 |
| Aerblue Limited | London | 2015 |
| Aerbuddies Limited | Brierley Hill | 2007 |
| Aercap Materials UK | London | 1995 |
| Aercap UK Aviation Limited | London | 2004 |
| Aercomp Precision Engineering Limited | Poole | 1997 |
| Aercon Consultants Ltd | Dartford | 1977 |
| Aercon Limited | Premier Business Park Walsall | 2001 |
| Aerd Ltd | Huddersfield | 2022 |
| Aere Energy Limited | Edinburgh | 2019 |
| Aereus Group Ltd | Leigh On Sea | 2025 |
| Aereus Limited | Bedford | 2013 |
| Aeria Interior Designs Limited | London | 2025 |
| Aerial Advantage Ltd | Ashford | 2019 |
| Aerial ARK Films Ltd | London | 2022 |
| Aerial Conservation Monitoring Limited | Salisbury | 2025 |
| Aerial Construction Services Ltd | Doncaster | 2020 |
| Aerial Defence Ltd | Driffield | 2021 |
| Aerial Drone & Helicopter Surveying Ltd | Uxbridge | 2025 |
| Aerial Drone Services Ltd | Towcester | 2019 |
| Aerial Drone Surveys Ltd | Swansea | 2016 |
| Aerial Ecology Ltd | Lewes | 2025 |
| Aerial Edge (Devon) Ltd | Torquay | 2015 |
| Aerial Edge Drone Services Ltd | Runcorn | 2025 |
| Aerial Geomatics Limited | Bristol | 2023 |
| Aerial Icon Limited | Chelmsford | 2017 |
| Aerial Image Ltd | Leigh-On-Sea | 2024 |
| Aerial Insight Solutions Limited | Canterbury | 2024 |
| Aerial Inspection Robotics Ltd | London | 2014 |
| Aerial Land Surveys Limited | New Milton | 2018 |
| Aerial Marks Ltd | Newark | 2025 |
| Aerial Media Services Ltd | Eastbourne | 2024 |
| Aerial Motion Pictures Limited | Emsworth | 2014 |