| AAB Group Accountants Limited | Newry | 1989 |
| AAB Home Consultancy Ltd | London | 2024 |
| AAB Housing Limited | London | 2019 |
| AAB Innovation Taxes Limited | Leeds | 2013 |
| AAB JV Audit Limited | Aberdeen | 2024 |
| AAB Logistics Solutions Ltd | Glasgow | 2023 |
| AAB Nominee Company Limited | Aberdeen | 2010 |
| AAB Payroll Limited | Aberdeen | 2021 |
| AAB People Limited | Aberdeen | 2025 |
| AAB Planning Consultancy Ltd | Crieff | 2024 |
| AAB Research Ltd | Cambridge | 2022 |
| AAB Tax Limited | Aberdeen | 2021 |
| AAB Trustee Company Limited | Aberdeen | 2013 |
| Aabacus Accountants & Consultants Limited | London | 2019 |
| Aabacus Accountants & Tax Consultants Ltd. | Bradford | 2011 |
| Aabacus Accountants Ltd | Bradford | 2019 |
| Aabacus Training Limited | Milton Keynes | 2006 |
| Aabala & Associates Consulting Ltd | Horley | 2017 |
| Aabbas Ltd | London | 2024 |
| Aabc Group Ltd | Stevenage | 2014 |
| Aabc Register Limited | Manchester | 1999 |
| Aabel Limited | Stafford | 2001 |
| Aabickerton Limited | Ashbourne | 2017 |
| Aable Roller Shutters (UK) Limited | Glasgow | 2013 |
| Aable Self Storage Limited | | 2002 |
| Aabm Limited | Swansea | 2014 |
| Aabsolute Self Storage Limited | Glasgow | 2010 |
| Aabw Ltd | Currie | 2024 |
| AAC & Partners Ltd | Newcastle Upon Tyne | 2023 |
| AAC (Services) Southern Limited | Cranbrook | 2013 |
| AAC Accountants Ltd | Huntingdon | 1997 |
| AAC and Co Consulting Ltd | Cambridge | 2020 |
| AAC Business Consulting Ltd | London | 2023 |
| AAC Commercial Solutions Limited | Wigan | 2023 |
| AAC Consultants Ltd | Birmingham | 2016 |
| AAC Consulting Ltd | Lichfield | 2020 |
| AAC Consulting Northwood Limited | Northwood | 2013 |
| AAC Development Consulting Limited | London | 2022 |
| AAC Engineering Ltd | London | 2026 |
| AAC Engineering Services Limited | Walsall | 2014 |
| AAC IT Ltd | Hounslow | 2020 |
| AAC Law Group UK Limited | London | 2018 |
| AAC Spectrum Limited | Tamworth | 1999 |
| AAC Surveyors Limited | Lincoln | 2008 |
| Aace Consulting Limited | Swanscombe | 2018 |
| Aace Pro Ltd | Witney | 2019 |
| Aacem Ltd | Blandford Forum | 2022 |
| Aacni (England) Limited | London | 2022 |
| Aaco Ventures Ltd | Chesham | 2021 |
| Aacorn Project Management Ltd | Southend-On-Sea | 2016 |
| Aacsl Accountants Ltd | Harlow | 2011 |
| Aacta Limited | Sutton Coldfield | 2020 |
| AAD (UK) Limited | London | 2013 |
| AAD Architects Limited | Sheffield | 1981 |
| AAD Capital Limited | London | 2014 |
| AAD Consultancy Limited | London | 2012 |
| AAD Insights Limited | London | 2026 |
| AAD Precision Engineering Ltd | Elgin | 2026 |
| Aadam Zayd Limited | Birmingham | 2025 |
| Aadavis Photography Limited | Canvey Island | 2019 |
| Aadc Limited | Sudbury | 2015 |
| Aadel Limited | Birmingham | 2009 |
| Aadeva Limited | Surrey | 2002 |
| Aadex Ltd | London | 2020 |
| Aadhav Green UK Limited | Aberdeen | 2025 |
| Aadhi Pixels Ltd | Morden | 2025 |
| Aadhikhola Consulting Ltd | London | 2025 |
| Aadhiran Limited | Ashton-Under-Lyne | 2021 |
| Aadhya Accountants Limited | Watford | 2020 |
| Aadhya PJ Ltd | Romford | 2018 |
| Aadi's HR & Accountancy Solutions Ltd | Weston-Super-Mare | 2018 |
| Aaditya Consultancy Limited | Stratford-Upon-Avon | 2026 |
| Aados Safety Management Limited | Middlesbrough | 2024 |
| Aadouglas Limited | Cheltenham | 2014 |
| Aadpharm Ltd | London | 2024 |
| Aadya Advisory Ltd | Bury St. Edmunds | 2026 |
| Aadyum Ltd | Stanmore | 2025 |
| AAE Consultants Limited | Bradford | 2017 |
| AAE Engineering Ltd | Wakefield | 2024 |
| AAE Freight Solutions Ltd | London | 2017 |
| AAE Vision Limited | Birmingham | 2023 |
| Aae-Pharma Limited | London | 2021 |
| Aaeaa Group Limited | Hillingdon | 2024 |
| Aaeducationuk Ltd | Sheffield | 2024 |
| Aaej Limited | Telford | 2008 |
| Aaela Ltd. | London | 2025 |
| Aaeon Systtem Ltd | Ruislip | 2021 |
| Aaet Limited | London | 2022 |
| Aaez Limited | Leeds | 2026 |
| AAF Consulting Ltd | London | 2017 |
| AAF Financial Ltd | Torquay | 2022 |
| AAF Financial Planning Europe Ltd | Torquay | 2019 |
| AAF Financial Services Ltd | Cheadle | 2025 |
| AAF Interim Solutions Limited | Watton At Stone | 2015 |
| AAF One Ltd | Liverpool | 2015 |
| AAF Optical Services Ltd | Manchester | 2023 |
| AAF Services Ltd | Beckenham | 2019 |
| Aaf-Mcquay UK Limited | Northumberland | 1988 |
| Aafa Limited | London | 2022 |
| Aafd Services Ltd | Coalville | 2018 |