| Ayme Holdings Limited | London | 2020 |
| Aymen Properties Ltd | Peterborough | 2022 |
| Aymi Socials Holdings Ltd | Manchester | 2026 |
| Aymora Ltd | London | 2025 |
| Aymy Holdings Ltd | Nottingham | 2022 |
| Ayngaran Jewellery Ltd | Wembley | 2021 |
| Ayni Holdings Limited | Arundel | 2025 |
| Aynsley Services Limited | Chester | 2004 |
| Aynvos Limited | Farnborough | 2025 |
| AYO Holdings Ltd | Edgware | 2025 |
| Ayodhya Investments Ltd | Northwood | 2026 |
| Ayokunle Toba Ltd | Manchester | 2014 |
| Ayone Financial Ltd | Croydon | 2025 |
| Ayoob Enterprises Ltd | Newcastle | 2025 |
| Ayot Place Limited | St Albans | 2020 |
| Ayoub Holdings Limited | Arnold | 2017 |
| Ayoub Residential Solutions Ltd | Gateshead | 2026 |
| AYR Investments Limited | London | 2020 |
| AYR Waste Management Group Limited | Bourne | 2025 |
| Ayra Investment Holdings Ltd | London | 2024 |
| Ayra Properties Ltd | Romford | 2018 |
| Ayrah Holdings Ltd | Glasgow | 2026 |
| Ayramara Limited | Leicester | 2025 |
| Ayre Family Investments Limited | Chichester | 2025 |
| Ayre Holdings Limited | Orpington | 2025 |
| Ayredale Limited | | 2003 |
| Ayres Holdings Limited | Bognor Regis | 2023 |
| Ayres Investment Management (UK) Limited | London | 2020 |
| Ayres Punchard Investment Management Limited | Ventnor | 2008 |
| Ayresbrook Limited | | 2002 |
| Ayresome Holdings Ltd | Bradford | 2020 |
| Ayreswood Ltd | Bracknell | 2025 |
| Ayrmid Holdings Ltd. | London | 2024 |
| Ayrmid Ltd. | London | 2024 |
| Ayrs Investments Ltd | Bolton | 2019 |
| Ayrshire Financial Services Ltd. | Ayrshire | 2000 |
| Ayrton Christie Limited | Biggleswade | 2021 |
| Ayrtone Holdings Limited | Poulton-Le-Fylde | 2019 |
| AYS Holdings Ltd | Stanmore | 2024 |
| Aysa Capital Limited | London | 2022 |
| Aysan Capital Holdings Limited | London | 2025 |
| Ayshella Ltd | Maidstone | 2013 |
| Ayston Capital Ltd | London | 2012 |
| AYT Finance Ltd | London | 2022 |
| Aythorpe Investments Ltd | Northampton | 2024 |
| Ayton Investments (Holding Co) Limited | Middlesbrough | 2026 |
| Ayton Law Limited | Great Ayton | 2003 |
| Aytug Holdings Ltd | London | 2024 |
| Ayub Holding Limited | London | 2017 |
| Ayub Holdings and Investments Ltd | High Wycombe | 2025 |
| Ayub Investments (Holdings) Ltd | Bolton | 2021 |
| Ayushi Holdings Limited | Edgware | 2017 |
| Ayuspa Group Limited | Harrow | 2019 |
| Ayuti Holdings Ltd | Walsall | 2021 |
| Ayvaan Group Holdings Ltd | London | 2026 |
| Ayvid Corporation Limited | London | 2024 |
| AYW Capital Ltd | Manchester | 2023 |
| Ayyadan Capital Ltd | Manchester | 2025 |
| AYZ Global Ltd | Musselburgh | 2025 |
| Ayzak Holdings Limited | Salisbury | 2022 |
| AZ Asset Finance Limited | Northampton | 2018 |
| AZ Capital Ltd | Glossop | 2025 |
| AZ Crown Europe Limited | London | 2022 |
| AZ Global Consulting Ltd | London | 2025 |
| AZ Global Property Solutions Limited | London | 2025 |
| AZ Group Holdings Limited | Coalisland | 2023 |
| AZ Haven Holdings Limited | Watford | 2026 |
| AZ Investment Group Ltd | Watford | 2024 |
| AZ Money Transfer Limited | London | 2026 |
| AZ Ventures Limited | Bristol | 2018 |
| AZ Younis Holding Ltd | Harlow | 2022 |
| AZA Healthcare Holdings Limited | London | 2026 |
| Azaa Ltd | Heckmondwike | 2025 |
| Azad Global Services Ltd | Preston | 2022 |
| Azad Group Holdings Ltd | London | 2026 |
| Azadia Holdings Ltd | Dalkeith | 2026 |
| Azaen Ltd | Ellesmere Port | 2025 |
| Azahmed Holdings Ltd | Oldham | 2026 |
| Azalea MAE Holdings Limited | Leeds | 2022 |
| Azalea Wealth Group Limited | Solihull | 2019 |
| Azalea Wealth Management Ltd | Hartlepool | 2025 |
| Azall Associates Ltd | Barnsley | 2025 |
| Azam Holdings Ltd | Rochdale | 2022 |
| Azam World Investments Limited | High Wycombe | 2025 |
| Azan Investments Limited | Hayes | 2024 |
| Azania Global Holdings Ltd | Cardiff | 2025 |
| Azara Holdings Limited | Tunbridge Wells | 2025 |
| Azari Brands Group Ltd | Mildenhall | 2026 |
| Azariel Holdings Ltd | Derby | 2026 |
| Azarine Limited | London | 2023 |
| Azasons Group Ltd | Haverhill | 2026 |
| Azazah UK Ltd | Southall | 2021 |
| AZB Adviser Services Limited | Sheffield | 2013 |
| Azdeg Trading Ltd | Nottingham | 2025 |
| Azdio Holdings Limited | London | 2019 |
| Azealon Capital Limited | Banstead | 2010 |
| Azealon Limited | Banstead | 2022 |
| Azee Platinum Services Limited | Wokingham | 2024 |
| Azeem Tariq Contracting Ltd | Middlesbrough | 2019 |
| Azego Group Holdings Limited | Reading | 2022 |