| AAM QA Consultancy Limited | Bedale | 2023 |
| AAM Software Limited | Wimborne | 2020 |
| AAM Solutions Ltd | Wallington | 2025 |
| Aamalnet Ltd | Doncaster | 2019 |
| Aamartrip Limited | London | 2025 |
| Aamay Resource Management Ltd | Slough | 2020 |
| Aambros Trading Ltd | London | 2012 |
| Aamci Consulting Limited | Glasgow | 2003 |
| Aamcom Limited | Epsom | 2009 |
| Aameen Limited | Manchester | 2016 |
| Aamico Limited | Milton Keynes | 2015 |
| Aamicus Computers Limited | St Asaph | 2007 |
| Aamin Consultancy Ltd | Crawley | 2022 |
| Aamir Group Enterprises Ltd | Wimborne | 2018 |
| Aaml Group Ltd | Dartford | 2021 |
| Aamoda IT Solutions Limited | Hounslow | 2011 |
| Aamoin Ltd | London | 2025 |
| Aampbis Limited | Polegate | 2009 |
| AAMR81 Ltd | London | 2024 |
| AAN Advisory Group Ltd | London | 2025 |
| AAN IT Services Ltd. | Greenford | 2018 |
| AAN Network Solutions Limited | Lytham St Annes | 2013 |
| AAN Technologies Limited | Northwich | 2022 |
| Aana Labs Ltd | London | 2026 |
| Aanagor Tech Ltd | Manchester | 2021 |
| Aancileco Limited | Reading | 2016 |
| Aanda Labs Limited | Grangemouth | 2025 |
| Aandhtechnogies Ltd | Docklands | 2025 |
| Aandp Media Ltd | Teddington | 2013 |
| Aanettosvideos Ltd | Huntingdon | 2023 |
| Aangeo Tech Ltd | Manchester | 2025 |
| Aanish PVT Ltd | Reading | 2021 |
| Aanitec Ltd | Sale | 2018 |
| Aannav Private Limited | Basingstoke | 2025 |
| Aanshu IT Solutions PVT Ltd | Edinburgh | 2011 |
| Aanya Technologies Limited | Sutton | 2022 |
| AAO Creative Ltd | Dartford | 2022 |
| AAO Records Limited | London | 2025 |
| Aaonline Ltd | Market Harborough | 2026 |
| AAP Films Limited | Sandy | 2022 |
| AAP Solutions Ltd | East Sussex | 2012 |
| AAP3 Limited | Southampton | 1997 |
| Aapd Limited | Kilmarnock | 2008 |
| Aapm Ltd | Halesowen | 2014 |
| Aapmor Ltd | Leeds | 2023 |
| Aaprod Ltd | London | 2023 |
| Aaptera Ltd | Doncaster | 2025 |
| Aaqspark Marketing Limited | Dagenham | 2026 |
| AAR Green Air Ltd | Newark | 2024 |
| AAR Limited | London | 2015 |
| AAR Multimedia Ltd | London | 2024 |
| AAR Software Services Limited | Leicester | 2016 |
| AAR Technologies Ltd | Milton Keynes | 2010 |
| Aara Solutions Limited | Barking | 2023 |
| Aaraa Technologies Ltd. | Southend-On-Sea | 2013 |
| Aarabdhi Limited | Greenford | 2023 |
| Aaragon Solutions Limited | Newport | 2008 |
| Aarai Solutions Ltd | Grays | 2026 |
| Aarambh Analytics Limited | London | 2026 |
| Aarambhmk Ltd | Hemel Hempstead | 2026 |
| Aaran Mckenzie Films Ltd | Sheffield | 2022 |
| Aaran Solutions Limited | West Bromwich | 2023 |
| Aarashi Consulting Services Limited | Slough | 2022 |
| Aarasoft Limited | Harrow | 2025 |
| Aarathy Arun Global Arts Ltd | Bromsgrove | 2025 |
| Aarav Consultancy Limited | Preston | 2025 |
| Aarav Global IT Solutions Ltd | Bournemouth | 2026 |
| Aarav Infotech Limited | Watford | 2013 |
| Aarav JAS Solutions Ltd | Ilford | 2023 |
| Aarav Limited | Twickenham | 2013 |
| Aarav Solutions Europe Ltd | Manchester | 2021 |
| Aarav Solutions Limited | Woking | 2014 |
| Aarav Technologies Limited | Reading | 2013 |
| Aarav Technology Limited | Coventry | 2017 |
| Aarc Contracting Ltd | Wimborne | 2023 |
| Aarc Solutions Limited | Huddersfield | 2026 |
| Aarch Consulting Ltd | Harrow | 2024 |
| Aarchar Consulting Ltd | Peterborough | 2019 |
| Aarchi Solutions Ltd | London | 2025 |
| Aarco Solutions Limited | London | 2010 |
| Aardbanq Ltd | London | 2019 |
| Aardcash Ltd | Croydon | 2019 |
| Aardent Ltd | Bedford | 2018 |
| Aardeo Limited | London | 2026 |
| Aardman Animations Limited | | 1986 |
| Aardman Arthur Christmas Limited | Bristol | 2009 |
| Aardman Beastly Bites Limited | Bristol | 2024 |
| Aardman Feature Development Limited | Bristol | 2008 |
| Aardman Features Limited | Avon | 1996 |
| Aardman Free Range Limited | Bristol | 2017 |
| Aardman Mossy Bottom Limited | Bristol | 2016 |
| Aardman Shaun the Sheep Limited | Bristol | 2012 |
| Aardman Sugarloaf Limited | Bristol | 2024 |
| Aardvark & Giraffe Ltd | Salisbury | 2018 |
| Aardvark Analytics Ltd | Leeds | 2022 |
| Aardvark Consultants Limited | Stockport | 1992 |
| Aardvark Consulting Limited | Manchester | 2013 |
| Aardvark Digital Ltd | Scunthorpe | 2020 |
| Aardvark Dormant Accounts Limited | Poole | 2025 |
| Aardvark Embedded Solutions Limited | Stockport | 2001 |