| Aeroscope Ltd | Edinburgh | 2025 |
| Aeroshi Ltd | Loughborough | 2025 |
| Aerosimo Ltd | Nuneaton | 2018 |
| Aerosoft Technologies Ltd | Milton Keynes | 2024 |
| Aerospace & Marine Transformative Technology Ltd | London | 2021 |
| Aerospace Aviation ME Ltd | Glasgow Central | 2026 |
| Aerospace Composites Limited | Stevenage | 2004 |
| Aerospace Sources Limited | London | 2022 |
| Aerospace Tech Media Ltd | Birkdale | 2020 |
| Aerospaceparking Ltd | Manchester | 2026 |
| Aerospect Ltd | London | 2021 |
| Aerosyn AI Ltd | Oxford | 2025 |
| Aerotec Systems and Software Ltd. | Craigavon | 2016 |
| Aerotech Aviation Ltd | London | 2024 |
| Aerotech Consulting Services Limited | Ashford | 2020 |
| Aerotechnology Ltd | London | 2023 |
| Aerotek Engineering and IT Solutions Ltd | Enfield | 2022 |
| Aerotics Technologies Limited | Feltham | 2025 |
| Aerotrac Limited | Southampton | 2011 |
| Aerotrix Labs Ltd | Milton Keynes | 2023 |
| Aerotwin Ltd | Harlow | 2025 |
| Aerotyne Industries Limited | London | 2015 |
| Aerovault Consulting Limited | London | 2024 |
| Aerovect UK Limited | Altrincham | 2026 |
| Aerovector Consulting Ltd | Worcester | 2026 |
| Aeroviewtv Limited | Portsmouth | 2023 |
| Aerovision Drone Services UK Ltd | Rotherham | 2024 |
| Aerovision Studios Limited | London | 2025 |
| Aerowill Ltd | London | 2025 |
| Aeroy Ltd | Shefford | 2020 |
| Aertel Limited | London | 2013 |
| Aerth Inc Limited | Baldock | 2024 |
| Aerus Media Limited | Kington | 2024 |
| Aervue Ltd | Newbury | 2025 |
| AES Defence Limited | Derby | 2009 |
| AES Development UK Ltd | London | 2023 |
| AES Digital Solutions Limited | Stockton-On-Tees | 1992 |
| AES Group (UK) Ltd | Derby | 2004 |
| AES Group Limited | Derby | 2008 |
| AES Health Tech Ltd | London | 2026 |
| AES IT Services Limited | London | 2014 |
| AES Management Consulting Ltd | London | 2026 |
| AES Matters Ltd | Walton-On-Thames | 2018 |
| AES Medical Limited | Derby | 2009 |
| AES Tech Limited | London | 2024 |
| AES Telecomms Ltd | Nottingham | 2019 |
| AES Visual Effects Limited | Colchester | 2023 |
| AES Web Services Ltd. | Cookstown | 2015 |
| Aesary Ltd | Wembley | 2025 |
| Aesca Limited | East Grinstead | 2013 |
| Aesculap Publishers Limited | London | 2024 |
| Aesculapius Professional Services Ltd | Eastwood | 2020 |
| Aesi Technology Ltd | London | 2026 |
| Aesir Change Consultancy Ltd | Redhill | 2012 |
| Aesir Labs Ltd | London | 2016 |
| Aesir Motion Pictures Ltd | Ruislip, | 2026 |
| Aesir Systems Limited | Reading | 2026 |
| Aesir Technology Ltd | London | 2025 |
| Aeskape Ltd | London | 2026 |
| Aesn Limited | Uxbridge | 2019 |
| Aesop Label Ltd | London | 2012 |
| Aesop Research Ltd | Southampton | 2021 |
| Aespheric Ltd | Barking | 2024 |
| Aessis Consulting Ltd | Hitchin | 2021 |
| Aessis Ltd | Hitchin | 2007 |
| Aessis Technology Ltd | Surbiton | 2021 |
| Aesthecenter Ltd | Waltham Abbey | 2022 |
| Aesthesia CIC | London | 2020 |
| Aesthethically Ltd | Uxbridge | 2014 |
| Aesthetic Nurse Software Limited | Birmingham | 2016 |
| Aesthetic Resolution IP Limited | Maidenhead | 2025 |
| Aesthetic Resolution Services Limited | Maidenhead | 2025 |
| Aesthetic Security Ltd | Chesterfield | 2025 |
| Aesthetic Studios London Ltd | London | 2025 |
| Aesthetica Magazine Limited | York | 2006 |
| Aestheticc Ltd | Banstead | 2025 |
| Aestheticiq Ltd | London | 2025 |
| Aestheticly Ltd | London | 2025 |
| Aesthetics (Leicester) Limited | Leicester | 2006 |
| Aesthetics Marketing Experts Ltd. | London | 2013 |
| Aesthetics Talent Limited | London | 2020 |
| Aesthetics Telephone AI Ltd | Chester | 2026 |
| Aestheticstwlf Ltd | Liverpool | 2026 |
| Aesthetidocs Ltd | Belfast | 2022 |
| Aesthetik Ltd | Sandy | 2008 |
| Aesthetiq Insight Ltd | Bristol | 2025 |
| Aesthetix Systems Ltd | Slough | 2026 |
| Aesthina Partners Ltd | London | 2019 |
| Aestia Limited | Leeds | 2019 |
| Aestivra Limited | London | 2025 |
| Aestora Limited | London | 2021 |
| Aestrata Ltd | Birmingham | 2020 |
| Aestrawave Ltd | Stevenage | 2025 |
| Aestus Limited | Sheffield | 2023 |
| Aesy Enterprise Ltd | Doncaster | 2024 |
| Aesyros Ltd | Accrington | 2025 |
| AET Consulting Ltd | Doune | 2023 |
| Aeterna Consulting Limited | Coventry | 2023 |
| Aeterna Ltd | London | 2025 |
| Aeterna Systems Group Ltd | Kington | 2025 |