| Adlinx Media Ltd | Kington | 2023 |
| Adlisters Ltd | Wigston | 2025 |
| Adlive Saudi Arabia Limited | London | 2021 |
| Adlk Consulting Ltd | London | 2025 |
| Adln Solutions Ltd | Belfast | 2021 |
| Adlo Atelier Ltd | London | 2024 |
| Adlo Consulting Ltd | Mildenhall | 2024 |
| Adlo Energy Ltd | Bury St. Edmunds | 2023 |
| Adlocal Limited | London | 2017 |
| Adloom Limited | London | 2026 |
| Adloox Limited | Warwick | 2013 |
| Adlr Management Services Limited | Bracknell | 2024 |
| Adls Financial Services Limited | Reigate | 2017 |
| Adlt Drinks Ltd | London | 2026 |
| Adlu Consultancy Ltd | Wantage | 2018 |
| Adlu Costs Ltd | Blackburn | 2014 |
| Adlure Ltd | Pontefract | 2025 |
| ADM & Partners Ltd | Sheffield | 2025 |
| ADM (225) Limited | Wallasey | 2008 |
| ADM (Group) Limited | London | 2014 |
| ADM (Holdings) Limited | Shipley | 2012 |
| ADM 53 Ltd | Radlett | 2025 |
| ADM Accountancy and Business Services Limited | Hull | 2015 |
| ADM Accountancy Services Limited | Cheltenham | 2009 |
| ADM Accountants (Yorkshire) Ltd | Harrogate | 2012 |
| ADM Accountants Limited | Ipswich | 2012 |
| ADM Advisors Ltd | Eastbourne | 2025 |
| ADM Bookkeeping Ltd | Bidford-On-Avon | 2022 |
| ADM Coatings Ltd | Coventry | 2026 |
| ADM Commercial Services Limited | Dudley | 2026 |
| ADM Construction Services Limited | Maidstone | 2016 |
| ADM Consult Limited Limited | London | 2019 |
| ADM Consultancy Ltd | Glasgow | 2020 |
| ADM Creative Ltd | Grimsby | 2011 |
| ADM Digital Solutions Ltd | Edinburgh | 2026 |
| ADM Distribution and Trading Limited | Liverpool | 2019 |
| ADM Engineering Consultancy Limited | Edinburgh | 2015 |
| ADM Financial Consultant Limited | Cambridge, | 2022 |
| ADM IFS Ltd | Warrington | 2025 |
| ADM Infrastructure Ltd | London | 2023 |
| ADM Mabe Services Limited | Penryn | 2025 |
| ADM Marketing Limited | Cleckheaton | 2002 |
| ADM Mechanical Engineering Limited | Warrington | 2018 |
| ADM Project Consultants Ltd | Glastonbury | 2021 |
| ADM Project Management Ltd | Edgbaston | 2023 |
| ADM Project Management Training Ltd | Glastonbury | 2021 |
| ADM Risk, Regulation & Strategy Ltd | London | 2005 |
| ADM Shine Analytics Limited | Coalville | 2020 |
| ADM Shine Innovation Limited | Coalville | 2020 |
| ADM Shine Ranges Limited | Coalville | 2020 |
| ADM Shine Technologies Limited | Coalville | 2005 |
| ADM Sports Consultants Limited | Haywards Heath | 2014 |
| ADM Surveyors Limited | Leicester | 2009 |
| ADM Tax Limited | Sutton Coldfield | 2024 |
| ADM Training Ltd | Horsham | 2011 |
| Adm&F Limited | Basingstoke | 2024 |
| Adma Holdings Limited | Buckingham | 2016 |
| Admac Advertising & Marketing Limited | | 1985 |
| Admac CS Ltd | Newtownards | 2022 |
| Admac Grip Services Limited | Tadley | 2006 |
| Admac Innovations Ltd | Cambridge | 2023 |
| Admac Limited | Rochester | 1989 |
| Admad Media Ltd | London | 2021 |
| Admaia Ltd | London | 2023 |
| Admaker Ltd | London | 2026 |
| Adman & Co Ltd | Uxbridge | 2012 |
| Admani Management Limited | Chesterfield | 2012 |
| Admaria Limited | Maidstone | 2024 |
| Admark Group Limited | London | 2017 |
| Admark Holdings Limited | London | 1999 |
| Admark Limited | London | 1986 |
| Admarketing Limited | Northampton | 2024 |
| Admart Europe Limited | Hoddesdon | 2025 |
| Admat Ltd | Doncaster | 2019 |
| Admatrix Limited | Farnham | 2013 |
| Admatsim Design Limited | Sutton | 2014 |
| Admatt Consulting Ltd | London | 2016 |
| Admazing Limited | Dorchester | 2021 |
| Admc (Asset Design, Management and Compliance) Ltd | Melton Mowbray | 2016 |
| Admconsult Ltd | Manchester | 2021 |
| Admd Limited | Brentwood | 2010 |
| Admea Solutions Limited | St. Helens | 2025 |
| Admec Group (North East) Limited | Birtley | 2010 |
| Admedia Digital Labs Ltd | London | 2023 |
| Admedia Impact Ltd | Isleworth | 2025 |
| Admedia Management Ltd | Barwick In Elmet | 2020 |
| Admedia Solutions Limited | Fleetwood | 2017 |
| Admediawales Limited | Cardiff | 2021 |
| Admedo Ltd | Birmingham | 2012 |
| Admenow Ltd | Bristol | 2011 |
| Admenta Pension Trustees Limited | Warwick | 1980 |
| Admenta UK Limited | Warwick | 1995 |
| Admentoris Ltd | Stockport | 2021 |
| Admerlin Limited | London | 2017 |
| Admet by Design Limited | Liverpool | 2024 |
| Admeta Limited | Glasgow | 2022 |
| Admiah Digital Ltd | Aylesbury | 2020 |
| Admihale Consulting Ltd | Birmingham | 2021 |
| Admin & Consultancy Services Ltd | London | 2021 |
| Admin & Event Solutions Limited | Barnet | 2012 |