| AA Services MCR Limited | Rochdale | 2025 |
| AA Soft Limited | Bolton | 2019 |
| AA Stars Ltd | Mildenhall | 2018 |
| AA Team Entertainment Limited | Grays | 2022 |
| AA Tech Data Limited | Luton | 2017 |
| AA Tech LAB Limited | Manchester | 2025 |
| AA Tech Services Limited | Mitcham | 2026 |
| AA Technologies Ltd | Eastleigh | 2022 |
| AA Technology Solutions Ltd | Redhill | 2017 |
| AA Telecoms Ltd | Reading | 2023 |
| AA Tours & Logistic Limited | London | 2020 |
| AA VFX Ltd | Manchester | 2019 |
| AA Whittlesey Computers Ltd | Peterborough | 2015 |
| AA Work Solution Ltd | High Wycombe | 2021 |
| Aa&D Consulting Services Ltd | Slough | 2025 |
| Aa's Consulting Limited | London | 2012 |
| Aa-Ukconsulting Ltd | Dewsbury | 2019 |
| Aa.Vv. Ltd | London | 2016 |
| AA4B Limited | Kidderminster | 2023 |
| AAA & Co 7 Ltd. | Stanmore | 2015 |
| AAA Contracting Ltd | London | 2025 |
| AAA Digital Ltd | London | 2026 |
| AAA Games Ltd | Oxford | 2012 |
| AAA Grease Guru Limited | Leeds | 2016 |
| AAA I Services (UK) Limited | London | 2020 |
| AAA Intelligent Solutions Ltd | Chatham | 2014 |
| AAA Interactive Ltd | Bristol | 2023 |
| AAA IT Consulting Limited | Cardiff | 2017 |
| AAA IT Services Ltd | London | 2022 |
| AAA IT Solutions Limited | London | 2016 |
| AAA Josan Studio Limited | Bedford | 2026 |
| AAA Management Corporation Ltd | London | 2020 |
| AAA Minds Limited | Wimborne | 2018 |
| AAA MTD Ltd | London | 2012 |
| AAA Productions UK Limited | Surbiton | 2024 |
| AAA Royale Ltd | Gravesend | 2018 |
| AAA Satellites & Aerials Limited | Greenford | 2010 |
| AAA Seminars Ltd | Ilford | 2020 |
| AAA Studios Limited | London | 2016 |
| AAA Technologies Ltd | Reading | 2022 |
| AAA Technology Limited | Chorley | 2016 |
| AAA Telecoms Ltd | Liverpool | 2022 |
| AAA Threat Intelligence Solutions Ltd | London | 2020 |
| Aaa-Tel Limited | London | 2024 |
| Aaaa Communications Limited | London | 2015 |
| Aaaaa Limited | Lincoln | 2023 |
| Aaaahhhh-Eek! Limited | Altrincham | 2018 |
| Aaaargh! Press Limited | Ipswich | 2012 |
| Aaag Studios Ltd | Dunstable | 2025 |
| Aaai Solutions Limited | London | 2024 |
| Aaajs Limited | Bolton | 2021 |
| Aaalabs Technologies Ltd | London | 2026 |
| Aaanasir Ltd | Cardiff | 2019 |
| Aaanow.Ai Ltd | London | 2024 |
| Aaarch Tech Ltd | Milton Keynes | 2024 |
| Aaariv Infotech Solutions PVT Limited | London | 2025 |
| Aaawesome Contracting Ltd | Chipping Norton | 2026 |
| AAB Consultants Ltd | Southampton | 2021 |
| AAB Infosec Ltd | Glasgow | 2015 |
| AAB Infotech Ltd | Milton Keynes | 2015 |
| AAB IT Consultants Limited | Birmingham | 2017 |
| AAB IT Ltd | Rugby | 2018 |
| AAB Media Limited | Edgware | 2018 |
| AAB Software Limited | Wirral | 2004 |
| AAB Software Solutions Ltd | London | 2023 |
| AAB Solutions Ltd | Wokingham | 2004 |
| Aabaced Ltd | Liverpool | 2025 |
| Aaban & Co. Ltd | Wembley | 2011 |
| Aaban Services Limited | Rainham | 2019 |
| Aabc Limited | Caerdydd | 2001 |
| Aabeaumont Ltd | London | 2025 |
| Aablar Limited | Darlington | 2022 |
| Aabmi Ltd | London | 2019 |
| Aabyss Limited | Hunts Cross | 2003 |
| Aabytec Ltd | Purley | 2013 |
| AAC and ME Ltd | Thirsk | 2025 |
| AAC Data Analytics Ltd | London | 2022 |
| AAC Digital Ltd | Waterlooville | 2022 |
| AAC Enterprise Ltd | Newcastle Upon Tyne | 2022 |
| AAC Systems Ltd | Maidenhead | 2005 |
| Aacle Limited | Sunderland | 2016 |
| Aacloud Solutions Limited | Peterborough | 2023 |
| Aacons Ltd | London | 2015 |
| AAD Creative Ltd | Northampton | 2018 |
| AAD IT Consultancy Limited | Harrow | 2023 |
| Aada's Code Base Limited | Manchester | 2024 |
| Aadamrichardson Ltd | Glasgow | 2025 |
| Aadawa Construction UK Private Limited | Nottingham | 2023 |
| Aadc Solutions Limited | Ashford | 2022 |
| Aadd Ltd | Bexhill On Sea | 2020 |
| Aadder Ltd | London | 2025 |
| Aadept Solutions Ltd | Silsoe | 2013 |
| Aadhan Consultancy Ltd | Staines-Upon-Thames | 2023 |
| Aadhan Education Technology Limited | Croydon | 2025 |
| Aadhi Consulting Limited | Reading | 2019 |
| Aadhi Limited | Belfast | 2013 |
| Aadhidaivika Consulting Ltd | Barnet | 2018 |
| Aadhix Digital Limited | West Drayton | 2026 |
| Aadhvyan Data Services Ltd | Southall | 2022 |
| Aadhya Consultancy Limited | Westcliff-On-Sea | 2015 |