| ADF Engineering Ltd | Grangemouth | 2013 |
| ADF Legal Consulting Limited | Bushey | 2023 |
| ADF Legal Services Limited | Chatham | 2025 |
| ADF NDT Services Limited | Manchester | 2022 |
| ADF Projects Ltd | Leicester | 2022 |
| ADF Scaffold Design Ltd | London | 2019 |
| ADF Services Limited | Warrington | 2019 |
| ADF Sports Ltd | Bolton | 2022 |
| ADF Technology Solutions Ltd | Reading | 2020 |
| ADF Ventures Limited | Renfrew | 2014 |
| Adfecto Group Ltd | London | 2025 |
| Adfer Environmental Limited | Cardiff | 2025 |
| Adferiad CYF | | 2005 |
| Adfest International Limited | Milton Keynes | 2021 |
| Adfield Marketing Services Limited | Shropshire | 2007 |
| Adfield-Harvey Limited | Shifnal | 1974 |
| Adfin Ltd | London | 2020 |
| Adfinitas Medical Limited | Dunmow | 2013 |
| Adfinity Media Ltd | Ellesmere Port | 2023 |
| Adfinstra Limited | Faversham | 2025 |
| Adfirmo Limited | Norfolk | 2004 |
| Adfirst Media Ltd | London | 2019 |
| Adfix Ltd | Ashby-De-La-Zouch | 2021 |
| Adfluence Creations Limited | London | 2025 |
| Adflux Media Solutions Ltd | Clevedon | 2025 |
| Adforceglobal Ltd | Slough | 2025 |
| Adforum Ltd | Burgess Hill | 2020 |
| Adframe Limited | Leeds | 2025 |
| Adfs Solutions Ltd | Epsom | 2025 |
| Adfuse Ltd | Birmingham | 2017 |
| Adfusion Limited | Llanelli | 2021 |
| Adfx Limited | Gravesend | 2025 |
| Adfym Ltd | London | 2022 |
| ADG ABK Ltd | London | 2021 |
| ADG Accountants (Tax) Limited | Bradford | 2015 |
| ADG Architects Limited | Darlington | 2013 |
| ADG Brickwork Contractors Limited | Dudley | 2016 |
| ADG Consulting Ltd | London | 2025 |
| ADG Creatives LAB Ltd | Nottingham | 2023 |
| ADG Engineering Limited | Huddersfield | 2001 |
| ADG Marsh Consulting Limited | Brighton | 2023 |
| ADG QS Services Limited | Leamington Spa | 2014 |
| ADG Sport Consultancy Ltd | Weybridge | 2018 |
| ADG Studio Limited | Cheetham | 2004 |
| ADG Surveying Ltd | Glasgow | 2018 |
| ADG Technical Services Limited | Liverpool | 2014 |
| ADG UK Consultancy Ltd | London | 2024 |
| Adgameture Limited | Bracknell | 2025 |
| Adgc Ltd | Old Windsor | 2012 |
| Adgen TV Solutions Limited | East Malling | 2009 |
| Adgenda Media International Services Ltd | Bournemouth | 2025 |
| Adgenda Media Services Limited | London | 2005 |
| Adgenious Ltd | London | 2025 |
| Adgm Limited | Holmfirth | 2011 |
| Adgnitio Consulting Ltd | Nottingham | 2025 |
| Adgo Limited | Crawley | 2025 |
| Adgold Consultancy Limited | Southend-On-Sea | 2014 |
| Adgoune Agency Ltd | London | 2025 |
| Adgramma Limited | London | 2012 |
| Adgro Consulting Ltd | London | 2017 |
| Adguru Ltd | London | 2022 |
| ADH Associates Limited | Chislehurst | 1999 |
| ADH Business Services Limited | Holmfirth | 2023 |
| ADH Business Solutions Limited | Cardiff | 2014 |
| ADH Communications Ltd | Bridgwater | 2026 |
| ADH Consultancy Ltd | Gloucester | 2020 |
| ADH Consultant Ltd | Wickham | 2023 |
| ADH Design Studio Ltd | Woodford Green | 2026 |
| ADH Engineering Ltd | Ilse Of Arran | 2019 |
| ADH Fulton Limited | London | 2022 |
| ADH Heating Services Limited | Sandy | 2003 |
| ADH IFA Ltd | Worthing | 2014 |
| ADH Inspections Limited | Great Yarmouth | 2013 |
| ADH Management Consulting Ltd | London | 2023 |
| ADH Management Ltd | Newark | 2020 |
| ADH Management Services Limited | Surrey | 2003 |
| ADH Marketing Ltd | London | 2021 |
| ADH Media Ltd | Dagenham | 2021 |
| ADH MOR Ltd | Belfast | 2025 |
| ADH Professional Services Ltd | Thames Ditton | 2026 |
| ADH Project Management Ltd | Tadworth | 2022 |
| ADH Retail Ltd | Blackpool | 2019 |
| ADH Risk Ltd | Chesterfield | 2016 |
| ADH Roofing and Cladding Consultancy and Management Ltd | Wolverhampton | 2018 |
| ADH Site Surveys Limited | Northallerton | 2007 |
| ADH Subsea Technical Services Limited | Chester Le Street | 2015 |
| ADH Swall Limited | London | 2018 |
| Adhalo Limited | Dagenham | 2025 |
| Adhan Properties Ltd | Blackburn | 2005 |
| Adhara Consulting Limited | Bromley | 2012 |
| Adhart Consulting Ltd | Leicester | 2026 |
| Adhartas Consulting Limited | Warrington | 2021 |
| Adhartas Healthcare Advisors Ltd | Croydon | 2015 |
| Adhartas HR Ltd | Dunfermline | 2024 |
| Adhartas Solutions Limited | Alton | 2018 |
| Adhaus Media Ltd | Belfast | 2002 |
| Adhay Holdings Ltd | Kingston Upon Thames | 2026 |
| Adhd Assist Ltd | Salisbury | 2025 |
| Adhd Confident Ltd | London | 2020 |
| Adhd Health Solutions Limited | Preston | 2025 |