| ADK Marketing Limited | Glasgow | 2005 |
| ADK Recruitment Services Ltd | Sunderland | 2016 |
| ADK Social Investment Ltd | New Malden | 2014 |
| ADK Support Services Limited | Ballymoney | 2018 |
| Adkast Developments Limited | Market Harborough | 2015 |
| Adkick Ltd | Cobham | 2017 |
| Adkins & Cheurfi North Ltd | Sunderland | 2024 |
| Adkins & Cheurfi Recruitment Ltd | Sunderland | 2016 |
| Adkins & Matchett (UK) Limited | London | 1997 |
| Adkins Design Ltd | York | 2003 |
| Adkins Medical Writing Services Limited | Tarporley | 2009 |
| Adkirk Law Employment Services Limited | Preston | 2015 |
| Adksupreme EE Ltd | London | 2017 |
| ADL & Partners Limited | Wakefield | 2025 |
| ADL Asset Testing Limited | Manchester | 2024 |
| ADL Bespoke Fire and Security Limited | Wolverhampton | 2024 |
| ADL Bespoke Security Systems Limited | Wolverhampton | 2019 |
| ADL Brickwork Limited | Broadstairs | 2010 |
| ADL Design Ltd | London | 2011 |
| ADL Fire and Security (UK) Limited | London | 2021 |
| ADL Fire Limited | London | 2014 |
| ADL Group of Companies Limited | London | 2021 |
| ADL Healthcare Limited | Derby | 2006 |
| ADL Inventory Services Limited | Hove | 2013 |
| ADL Landscapes Ltd | Rainworth | 2020 |
| ADL Partners (UK) Ltd | Stamford | 2014 |
| ADL Plant Hire Limited | Widnes | 2022 |
| ADL Projects (London) Ltd | Orpington | 2014 |
| ADL Rehab Ltd | Manchester | 2015 |
| ADL Security (UK) Limited | London | 2014 |
| ADL Shopfitters Ltd | Thaxted | 2017 |
| ADL South East Limited | Berkhamsted | 2016 |
| ADL Talent Solutions Ltd | Manchester | 2025 |
| ADL Tree Services Limited | London | 2020 |
| Adlam Consulting Limited | Harrow | 1999 |
| Adlcd Limited | Wallasey | 2025 |
| Adlee Exterior Cleaning Ltd | Potters Bar | 2025 |
| Adleo Ltd | Guildford | 2024 |
| Adler Manufacturing Limited | Reading | 1989 |
| Adler Mediation Ltd | Crowborough | 2023 |
| Adler Practice Consultancy Limited | North Finchley | 2022 |
| Adler Security Ltd | Coventry | 2024 |
| Adler Tours Limited | | 2007 |
| Adlestrop Consulting Limited | Bridgnorth | 2009 |
| Adlevo Ltd | Edinburgh | 2015 |
| Adley Jones & Co. Ltd. | London | 2025 |
| Adlib Limited | London | 2015 |
| Adlib Trustees Limited | Bristol | 2020 |
| Adlin Professional Limited | London | 2011 |
| Adlines Limited | Ashford | 1991 |
| Adlington Convenience Store Ltd | Adlington | 2008 |
| Adlington HR Solutions Limited | Towcester | 2014 |
| Adlington Valeting Chorley Road Ltd | Bolton | 2024 |
| Adlins Limited | Nottingham | 2022 |
| Adlip Ltd | Hailsham | 2015 |
| Adlit Investments Limited | Chelmsford | 2008 |
| Adlite Property Staging Ltd | London | 2025 |
| Adll Ltd | Leicester | 2024 |
| Adlocks Locksmiths Ltd | Chelmsford | 2021 |
| Adlogo Limited | Northamptonshire | 2002 |
| Adlon Iiix. Invest Limited | Cardiff | 2010 |
| Adlongstaffs Limited | Kidderminster | 2013 |
| Adlux Care Limited | Sheffield | 2022 |
| ADM - Cleaning & Management Services Ltd | London | 2026 |
| ADM Accounting Ltd | Pulborough | 2017 |
| ADM Auto Detailing Ltd | Wakefield | 2020 |
| ADM Auto Ltd | London | 2024 |
| ADM Cleaning Ltd | Aldershot | 2025 |
| ADM Commissioning Services Limited | Sidcup | 2019 |
| ADM Contracting Limited | Walsham-Le-Willows | 2022 |
| ADM Energy Services Limited | London | 2020 |
| ADM Exos Limited | Stoke-On-Trent | 2019 |
| ADM Fire & Security Ltd | Dunfermline | 2023 |
| ADM Lindenau Acquisition Limited | Kingston Upon Thames | 2012 |
| ADM Lindenau Limited | Kingston Upon Thames | 2012 |
| ADM Packaging Supplies UK Ltd | Isleworth | 2012 |
| ADM Plumbing, Heating & Electrical Limited | Dereham | 2013 |
| ADM Procurement Consultancy Limited | Bolton | 2012 |
| ADM Recruitment Ltd | Rugeley | 2024 |
| ADM Security Services Ltd | Slough | 2024 |
| ADM Support Services Limited | Ashby-De-La-Zouch | 2013 |
| ADM Technical Solutions Limited | Warrington | 2011 |
| ADM Venture Services Limited | London | 2021 |
| ADM4DYN Holding Limited | Bracknell | 2010 |
| Admac Franchise Limited | London | 2021 |
| Admaiden Ltd | Birmingham | 2010 |
| Admaius UK Advisors Limited | London | 2025 |
| Adman Plant Services Limited | Omagh | 2013 |
| Admantra Limited | Warrington | 2023 |
| Admar Engineering Ltd | Barton On Sea | 2005 |
| Admatica Limited | Newbury | 2008 |
| Admax Corporate Homes Ltd | Dudley | 2019 |
| Admed Business Solutions Limited | London | 2022 |
| Admein Ltd | St Albans | 2017 |
| Admeliora Art & Design Limited | Warrington | 2014 |
| Admf Productions Ltd | Manchester | 2017 |
| Admidas Limited | London | 2020 |
| Admin & Financial Controls Ltd | Huddersfield | 2011 |
| Admin 4 U (UK) Limited | Liverpool | 2008 |
| Admin 4U Limited | Sunderland | 2008 |