| Argonon 1 Ltd | London | 2026 |
| Argonon 2 Ltd | London | 2026 |
| Argonon Ltd | London | 2011 |
| Argonon USA Ltd | London | 2017 |
| Argonux Technology Solutions Ltd | London | 2025 |
| Argos Capital Ltd | London | 2024 |
| Argos Labs Ltd | London | 2021 |
| Argos Print 2015 Ltd | London | 2015 |
| Argosec Ltd | London | 2025 |
| Argot Bertha Productions Ltd | Eastleigh | 2016 |
| Argot Ltd | London | 2020 |
| Argraff Ltd | Ceredigion | 2004 |
| Args Solutions Ltd | London | 2022 |
| Argseo Ltd | London | 2026 |
| Argsment Limited | London | 2021 |
| Argsoft Consultants Limited | London | 2005 |
| Argsoft Sales and Engineering Limited | Hammersmith | 2005 |
| Argtech Ltd | Weston-Super-Mare | 2018 |
| Argti Software & IT Solutions UK Ltd | Blackburn | 2024 |
| Argumentful Ltd | London | 2022 |
| Argus AI Group UK Ltd | London | 2025 |
| Argus Autonomy Ltd | London | 2026 |
| Argus Communications Limited | East Ham | 2012 |
| Argus Consultancy Ltd | Dundee | 2016 |
| Argus Holdings - KLL1 Ltd | London | 2026 |
| Argus Information Security Limited | Lancaster | 2017 |
| Argus Intelligence Limited | Chadwell Heath | 2008 |
| Argus IT Ltd | Milton Keynes | 2002 |
| Argus Labs Limited | London | 2018 |
| Argus Media Limited | London | 1982 |
| Argus Media South Africa Limited | London | 2017 |
| Argus Network Solutions Limited | Southampton | 2010 |
| Argus RUS Limited | London | 2001 |
| Argus Software (UK) Ltd. | London | 1990 |
| Argus True ID Limited | London | 2017 |
| Argus Ventures Limited | Lincoln | 2019 |
| Argus Vickers Limited | London | 1993 |
| Argusync Ltd | Norwich | 2023 |
| Argute Insights Ltd | London | 2024 |
| Argutia Intelligence Limited | London | 2019 |
| Argyle Craft Ltd | London | 2024 |
| Argyle IT & Education Limited | Aberdeen | 2020 |
| Argyle IT Consulting Limited | North Finchley | 2013 |
| Argyle One Ltd. | Biggleswade | 2017 |
| Argyle Productions Ltd | Glasgow | 2019 |
| Argyle Services Limited | Bedfordshire | 1998 |
| Argyle Stark Consultancy Limited | Glasgow | 2023 |
| Argyll & Buchanan Limited | Glasgow | 2017 |
| Argyll Broadcast Connections Limited | Bute | 2006 |
| Argyll Data Development Ltd | Dunoon | 2023 |
| Argyll Development Management Limited | Dunoon | 2025 |
| Argyll Ferries Ltd. | Arbroath | 2010 |
| Argyll FM Limited | Campbeltown | 1995 |
| Argyll IT Limited | Dumbarton | 2012 |
| Argyll Limited | Renfrew | 2024 |
| Argyll Management Consultants Ltd | Cheadle | 2021 |
| Argyll Media Limited | Edinburgh | 2015 |
| Argyll Print & Design Ltd | Dunoon | 2015 |
| Argyll Publishing Ltd | London | 2022 |
| Argyll Stuart Limited | Poole | 2013 |
| Argyll Systems Limited | Glasgow | 2012 |
| ARH Business Services Ltd | West Sussex | 2005 |
| ARH Productions Limited | Barnet | 2018 |
| ARH Software Testing Consultancy Ltd | Looe | 2026 |
| ARH Tech Ltd | Leicester | 2022 |
| Arha Labs Limited | Derby | 2017 |
| Arhab Limited | Manchester | 2025 |
| Arham Digital Ltd | London | 2025 |
| Arham Enterprises Ltd | Hayes | 2019 |
| Arhamsoft Ltd | London | 2025 |
| Arhant Rohan IT Ltd | Harrow Middlesex | 2012 |
| Arhato Limited | Chesham | 2019 |
| Arhistory Ltd | Wirral | 2023 |
| Arhizom Consulting Ltd | London | 2023 |
| Arhont Services Limited | London | 2019 |
| Arhtim Ltd | Reading | 2014 |
| Arhvel (UK) I.T. and Research Ltd | Leeds | 2025 |
| Arhw Ltd | Princes Risborough | 2024 |
| Arhz IT Services Limited | Brentford | 2016 |
| ARI (Emea) Limited | Uxbridge | 2025 |
| ARI AG Invest Ltd | Newmarket | 2025 |
| ARI Cole Consultancy Ltd | Darwen | 2021 |
| ARI Connects Limited | Bromley | 2010 |
| ARI Consulting Group Limited | London | 2024 |
| ARI Data Services Ltd | Poole | 2022 |
| ARI Digital Solutions Ltd | London | 2025 |
| ARI Events Ltd | Luton | 2021 |
| ARI Media Limited | Southampton | 2013 |
| ARI Pensmith Music Ltd | London | 2017 |
| ARI Rutland Ltd | Watford | 2024 |
| ARI Techno Ltd | Enfield | 2025 |
| ARI Technology Limited | Bristol | 2019 |
| Ari&Zak Ltd | Luton | 2025 |
| Aria AI Ltd | London | 2025 |
| Aria Broadband Limited | Basildon | 2014 |
| Aria Brothers Ltd | London | 2023 |
| Aria Business Consulting Ltd | London | 2024 |
| Aria Castle Ltd | London | 2026 |
| Aria Connect Ltd | London | 2023 |
| Aria Consulting Engineers Limited | Milton Keynes | 2015 |