| A1 Logistics & Freight Limited | Stoke On Trent | 2003 |
| A1 Logistics Holdings Ltd | Enniskillen | 2021 |
| A1 Media Capital Ltd | London | 2019 |
| A1 Mortgage Solutions Ltd | Bradford | 2022 |
| A1 Mortgages Limited | Bicester | 2000 |
| A1 Paraplanning Services Limited | Stone | 2016 |
| A1 Petra Minerals Ltd | London | 2012 |
| A1 Property Finance Ltd | Watford | 2024 |
| A1 Property Holdings Ltd | Taunton | 2015 |
| A1 Quantum Energy Ltd | Wrexham | 2015 |
| A1 Security Solutions Ltd | London | 2023 |
| A1 Total Properties Limited | London | 2016 |
| A1 Wokingham Car Spares Limited | Wokingham | 2026 |
| A10 Brokers Limited | Luton | 2017 |
| A10 Invest Ltd | London | 2024 |
| A10A Holding Limited | Witney | 2023 |
| A14 Energy Limited | Lincoln | 2023 |
| A16Z EU Nominees Limited | St Albans | 2022 |
| A1CWM Holdings Limited | Liverpool | 2023 |
| A1K Holding Ltd | London | 2022 |
| A1PHA Security Services Ltd | Southampton | 2021 |
| A1X Trading Limited | London | 2025 |
| A1X3 Assets (Holding) Limited | Birmingham | 2024 |
| A2 Advice Ltd | Sheffield | 2020 |
| A2 Consulting Ltd | London | 2015 |
| A2 CSD Limited | Eastbourne | 2018 |
| A2 Holding Ltd | London | 2024 |
| A2 Realty Limited | Ilford | 2019 |
| A24 Holdings Limited | London | 2018 |
| A25M Limited | Bury St. Edmunds | 2025 |
| A2626 Limited | London | 2026 |
| A28 Group Ltd | Norwich | 2025 |
| A2B Analytics Holdings Limited | Sale | 2021 |
| A2B Commercial Insurance Services Limited | Cheam | 1994 |
| A2B Consulting Limited | London | 2013 |
| A2B Financial Ltd | Oldham | 2020 |
| A2B Financial Solutions Limited | Grimsby | 2018 |
| A2B FX Strategy Ltd | Redhill | 2024 |
| A2B Taxis Northallerton Holdings Limited | Richmond | 2018 |
| A2BROKER FX Ltd | Liverpool | 2025 |
| A2GE Limited | London | 2022 |
| A2H Holdings Limited | Stockton-On-Tees | 2024 |
| A2H Live Holding Limited | Newport | 2023 |
| A2K Holdings Limited | Watford | 2022 |
| A2K Investments Limited | Reading | 2013 |
| A2K Midco Limited | Watford | 2019 |
| A2K Topco Limited | Watford | 2019 |
| A2LV Ltd | London | 2025 |
| A2M Financial & Estate Planning Ltd | Aberdeen | 2015 |
| A2M Investments Limited | Manchester | 2025 |
| A2O Holding International Limited | Rochester | 2023 |
| A2R Europe Ltd | Edinburgh | 2013 |
| A2R Fincon Trading & Investments Limited | Orpington | 2016 |
| A2R Holdings Limited | Portsmouth | 2025 |
| A2URE Holdings Limited | Loughton | 2021 |
| A2V Finance Limited | London | 2025 |
| A2W Holdings Ltd | Fraserburgh | 2025 |
| A2X Corp. Ltd | London | 2025 |
| A2Z Bridging Limited | Hounslow | 2018 |
| A2Z Civils Ltd | Derby | 2025 |
| A2Z Commercial Finance Ltd | London | 2021 |
| A2Z Finance and Protection Ltd | London | 2016 |
| A2Z Financial Services Limited | Shipley | 1999 |
| A2Z Fire Protection Holdings Limited | Newcastle Upon Tyne | 2022 |
| A2Z Lending Ltd | Hounslow | 2024 |
| A2Z Private Limited | Horsham | 2019 |
| A2Z Urban Holdings Ltd | Nuneaton | 2024 |
| A3 Capital Investments Limited | London | 2025 |
| A3 CSD Limited | Eastbourne | 2018 |
| A3 Holding Group Ltd | Bromley | 2026 |
| A3 Mortgage Services Limited | Epsom | 2019 |
| A3 Thurlery Limited | Chigwell | 2014 |
| A365 Group Limited | Warrington | 2021 |
| A3C Capital Limited | London | 2016 |
| A3J Group Limited | Kettering | 2020 |
| A3J Limited | Kettering | 2019 |
| A3K Holding Ltd | London | 2026 |
| A3S Vine Assets Ltd | London | 2026 |
| A4 Capital Ltd | Aylesbury | 2023 |
| A4 Contracts Limited | Glasgow | 2023 |
| A4 CSD Limited | Eastbourne | 2018 |
| A4 Holdings Ltd | Sunderland | 2024 |
| A4A Marketing Ltd | St. Austell | 2020 |
| A4S Services Limited | London | 2020 |
| A4T Group Ltd | London | 2026 |
| A5 CSD Limited | Eastbourne | 2018 |
| A55 Health & Protection Ltd | Chester | 2026 |
| A6 Audio Limited | Kidlington | 2017 |
| A67 Holding Ltd | Doncaster | 2026 |
| A7 Capital Limited | London | 2026 |
| A7 Holdings Ltd | Shirley, Solihull | 2024 |
| A7 Padel Holding Ltd | Virginia Water | 2025 |
| A82 Group Ltd | Chelmsford | 2016 |
| A87 Holdings Ltd | United Kingdom | 2025 |
| A: Living Limited | London | 2022 |
| AA & CA Holdings Ltd | Blackburn | 2026 |
| AA & Co Group Ltd | Walsall | 2020 |
| AA & KS Holdings Limited | Stoke-On-Trent | 2016 |
| AA & MA White Limited | Taunton | 2023 |
| AA & RA Ltd. | Bradford | 2026 |