| Adkwik Holdings Limited | Cambridge | 2024 |
| ADL Commercial Finance Ltd | City Of London | 2024 |
| ADL Holdco Limited | Altrincham | 2024 |
| ADL Trustee Services Ltd | City Of London | 2021 |
| Adlam Financial Limited | Darlington | 2015 |
| Adlb Holdings Limited | Manchester | 2025 |
| Adld Ltd. | Doncaster | 2009 |
| Adler Bornstein Invest Group Ltd | London | 2024 |
| Adler Brokerage Limited | London | 2024 |
| Adler Fairways Insurance Brokers Limited | Tunbridge Wells | 2002 |
| Adler Fairways Insurance Group Limited | Tunbridge Wells | 2016 |
| Adler Family Investments Limited | London | 2026 |
| Adler Financial Planning Limited | Birmingham | 2009 |
| Adler Green Ltd | London | 2025 |
| Adler Group Holdings Limited | London | 2019 |
| Adler Limited | Wembley | 2006 |
| Adler Private Office Limited | London | 2026 |
| Adlerco Limited | London | 2026 |
| Adlestrop Associates Ltd | Moreton In Marsh | 2024 |
| Adlevo Aeternum Limited | Harrow | 2024 |
| Adlib Finance Limited | Beverley | 2011 |
| Adlib Loans Limited | Romsley | 2018 |
| Adlib Mortgages Limited | Romsley | 2013 |
| Adlijib Limited | London | 2025 |
| Adlington Finance Limited | Macclesfield | 2010 |
| Adlington Holdings Ltd | Bollington | 2026 |
| Adlington Welding Supplies (Holdings) Limited | Altrincham | 2013 |
| Adliv Solutions Ltd | Gloucester | 2006 |
| Adlkish Holdings Limited | Cheltenham | 2021 |
| Adlr Dales Manor Ltd | Great Abington | 2023 |
| Adluco Limited | Brighouse | 2021 |
| ADM Accounting & HR Ltd | London | 2025 |
| ADM Capital Limited | Leicester | 2020 |
| ADM Endeavour Property Limited | London | 2024 |
| ADM Financial Services Ltd | Leeds | 2022 |
| ADM Group Holdings Ltd | Bellaghy | 2017 |
| ADM Healthcare Holdings Limited | Wednesbury | 2024 |
| ADM Holding London Ltd | London | 2021 |
| ADM Holdings Sussex Ltd | Chichester | 2025 |
| ADM Investment Group Ltd | Derby | 2020 |
| ADM Investor Services International Limited | London | 1990 |
| ADM Pressings (Holdings) Limited | Newcastle Upon Tyne | 2025 |
| ADM Share 1 Ltd | Birmingham | 2023 |
| Adma Holding Investment Ltd | North Harrow | 2022 |
| Adma International Holding Limited | London | 2026 |
| Admac Holdings Limited | Rochester | 2023 |
| Admaco Limited | Waterlooville | 2022 |
| Admacro Ltd | Barnet | 2016 |
| Adman Group Limited | Omagh | 2017 |
| Adman International Ltd. | Greenock | 2009 |
| Admar Investments Limited | Ashby-De-La-Zouch | 2019 |
| Admarsh Mortgage’S Ltd | Great Eccleston | 2021 |
| Admc Holdings Ltd | Knutsford | 2022 |
| Admet Management Holdings Limited | Leigh On Sea | 2022 |
| Admet Management Limited | Leigh On Sea | 2006 |
| Admg Consulting Limited | London | 2024 |
| Admi Holdings Limited | Newcastle Under Lyme | 2018 |
| Admic Limited | Isleworth | 2023 |
| Admill Holdings Limited | Doncaster | 2025 |
| Administrative Services International Limited | Sale | 2015 |
| Administrators of HRH Healthcare Pension Plans Ltd | Grays | 2020 |
| Administratum Ltd | Bolton | 2024 |
| Admiral Ackbar Holdings Limited | London | 2017 |
| Admiral Financial Services Limited | Cardiff | 2016 |
| Admiral Group PLC | Cardiff | 1999 |
| Admiral Holdings Ltd | Reigate | 2024 |
| Admiral Insurance Company Limited | Cardiff | 2000 |
| Admiral Marine Limited | Bristol | 1991 |
| Admiral Markets UK Ltd | London | 2012 |
| Admiral Trading Investment Ltd | East Grinstead | 2023 |
| Admired Solutions Limited | Manchester | 2021 |
| Admixer Advertising Limited | London | 2023 |
| Admoveo Holdings Ltd | Thetford | 2022 |
| Adms Asset Management Limited | Norwich | 2011 |
| ADN Advisory Limited | Aylesbury | 2016 |
| ADN Bridging & Commercial Finance Limited | Portsmouth | 2024 |
| ADN Capital Markets Limited | Bristol | 2020 |
| ADN Investment Ltd | London | 2017 |
| ADN Investment Products Limited | Bristol | 2020 |
| ADN Partnership Group Ltd | Leicester | 2026 |
| ADN Pro Limited | Enfield | 2016 |
| ADN Pship Holdings Ltd | Leicester | 2026 |
| ADN1 Ltd | Leicester | 2026 |
| Adna Holdings Ltd | London | 2020 |
| Adnan Dent Ltd | Portsmouth | 2022 |
| Adnan Group Limited | Bristol | 2020 |
| Adnan Masood Limited | Oldham | 2014 |
| Adnfc Financial Consultants Ltd | York | 2019 |
| Adnic Holdings Limited | Walsall | 2025 |
| Adnic International Ltd | Watford | 2017 |
| Adno Group Limited | London | 2018 |
| Adnoc International UK Limited | Birmingham | 2024 |
| Adnoc XRG Turkmenistan Limited | Birmingham | 2025 |
| ADO Construction Limited | Stirling | 2004 |
| Adobe Group Limited | London | 2023 |
| Adok Investments Ltd | Edgware | 2025 |
| Adomis Group Limited | Sheffield | 2024 |
| Adon Hakol Estates Limited | London | 2025 |
| Adonai Capital Limited | Edgware | 2017 |
| Adonai Holdings Limited | Hoddesdon | 2005 |