| AD Recycling Holdings Limited | Widnes | 2022 |
| AD Renewable Lending Limited | Leeds | 2018 |
| AD Sustainable Foods Ltd | London | 2023 |
| AD Valorem (AB) Limited | Milton Keynes | 2024 |
| AD Valorem (DK) Limited | Milton Keynes | 2024 |
| AD Valorem (NW) Limited | Milton Keynes | 2024 |
| AD Valorem (SW) Limited | Milton Keynes | 2024 |
| AD Valorem (TF) Limited | Milton Keynes | 2024 |
| AD Valorem (ZA) Limited | Milton Keynes | 2024 |
| AD Valorem Advisers Limited | East Sussex | 2005 |
| AD Valorem Securitatis Limited | London | 2021 |
| AD Valorem Wealth Management Services Limited | Milton Keynes | 2025 |
| AD Wealth Management Ltd | Manchester | 2024 |
| AD Wind Farmers Limited | London | 2011 |
| AD Xray Ltd | Ilford | 2023 |
| Ad-Asta UK Ltd | London | 2024 |
| AD1 Holdings Limited | Maidstone | 2025 |
| AD1023 Ltd | London | 2020 |
| AD3 (Nottingham) Limited | Nottingham | 2011 |
| AD3 Holdings (Leeds) Limited | Preston | 2023 |
| AD77 Ltd | Cleveland | 2021 |
| AD8284 Holdings Limited | Sutton-In-Ashfield | 2023 |
| ADA & Co Group Ltd | Sheffield | 2021 |
| ADA Corporate Capital Limited | London | 2024 |
| ADA Finance Limited | London | 2009 |
| ADA Financial Holding Limited | London | 2025 |
| ADA Group Ltd | Sheffield | 2023 |
| ADA Holding Group Ltd | London | 2023 |
| ADA Holdings (Yorkshire) Ltd | Mirfield | 2021 |
| ADA Infrastructure UK Operations Limited | London | 2024 |
| ADA Kasko Ltd | London | 2026 |
| ADA Management Ltd | Huddersfield | 2019 |
| ADA NW Holdings Ltd | Burnley | 2026 |
| ADA RCT Holdings Limited | Treorchy | 2024 |
| ADA Real Estate Ltd | Delph | 2024 |
| ADA Risk Holding Co Limited | London | 2023 |
| ADA Syndicate Limited | London | 2023 |
| ADA Underwriters Limited | London | 2023 |
| ADA17 | Norwich | 2020 |
| Adabim Investment Company Ltd | Sheffield | 2023 |
| Adabrock Investments Limited | Glasgow | 1996 |
| Adactus Solutions Limited | Thame | 2016 |
| Adagi Advisors Ltd | London | 2022 |
| Adah Properties Ltd | London | 2023 |
| Adair Group Ltd | Brentwood | 2018 |
| Adair Homes Ltd | Saintfield | 2018 |
| Adalan Ventures PLC | London | 2018 |
| Adalchemy Holdings Ltd | Maidenhead | 2025 |
| Adale Dawit Dagnachew (ADD) Ltd | London | 2019 |
| Adalo Asset Backed Securitisation Limited | London | 2023 |
| Adalta Group Limited | Cheadle Hulme | 2009 |
| Adam & Sons Limited | Rochford | 2006 |
| Adam and Co. Investments Limited | Huddersfield | 2021 |
| Adam and EVE Organisation Limited | Enfield | 2025 |
| Adam Atelier Group Ltd | London | 2025 |
| Adam Ayres Ltd | Coventry | 2021 |
| Adam Bagley Financial Planning Ltd | Lowestoft | 2018 |
| Adam Barker Limited | Haywards Heath | 2017 |
| Adam Carr Builders Holdings Limited | Carnforth | 2019 |
| Adam Chase Commercial Ltd | London | 2025 |
| Adam Chase Financial Ltd | London | 2025 |
| Adam Chase Holdings Ltd | London | 2025 |
| Adam Clark Holdings Ltd | Chester | 2021 |
| Adam Clarke Ltd | Doncaster | 2014 |
| Adam Cotterill Limited | Nottingham | 2024 |
| Adam Dean Investments (Worldwide) Ltd | Heckmondwike | 2002 |
| Adam Dumbrill Limited | Worthing | 2021 |
| Adam Essap Holdings Ltd | Bolton | 2022 |
| Adam Estate Holding Ltd | London | 2023 |
| Adam Finance Limited | Hillingdon | 2020 |
| Adam Financial Services Limited | Longniddry | 2019 |
| Adam George Financial Services Limited | London | 2014 |
| Adam Gleeson Ltd | Cinderford | 2024 |
| Adam Global Limited | Billericay | 2012 |
| Adam Goldstone Holdings Limited | Newcastle Upon Tyne | 2024 |
| Adam Griffiths Holdings Ltd | Stockport | 2022 |
| Adam J Tovey Ltd | Covent Garden | 2023 |
| Adam J Tuck Limited | Derby | 2021 |
| Adam James Bristow Holdings Ltd | Eastleigh | 2021 |
| Adam James Financial Solutions Limited | Wrexham County Borough | 2005 |
| Adam JR Ltd | Stockton-On-Tees | 2025 |
| Adam Katten Limited | London | 2025 |
| Adam Kelwick Holdings Ltd | Tyldesley | 2021 |
| Adam Klein Consultants Limited | Finchley | 2017 |
| Adam Lane Limited | Hove | 2019 |
| Adam Lewis First in Mortgages Ltd | Cwmbran | 2025 |
| Adam Lloyd Holdings Limited | London | 2023 |
| Adam Love Holdings Ltd | Middlesbrough | 2024 |
| Adam Lythgoe Holdings Limited | Widnes | 1948 |
| Adam Lythgoe Limited | Widnes | 1963 |
| Adam Mcdermott Holdings Ltd | Ballygawley | 2021 |
| Adam Mcmahon Limited | Manchester | 2022 |
| Adam Murphy Consultancy Ltd | Leigh-On-Sea | 2023 |
| Adam Newman Holdings Limited | Barnsley | 2024 |
| Adam Owens Financial Solutions Limited | Chester | 2008 |
| Adam Ross Ltd | Birmingham | 2016 |
| Adam Security UK Limited | Ilford | 2023 |
| Adam Sinclair & Associates Wealth Management Ltd | Aberdeen | 2021 |
| Adam Slee Property Ltd | London | 2023 |
| Adam Smith Financial Services Limited | Droitwich Spa | 2017 |