| Ademen Limited | Stratford-Upon-Avon | 2020 |
| Ademi Associates Ltd | London | 2026 |
| Ademo Consulting Ltd | Lancaster | 2015 |
| Ademola Adebiyi Consulting Ltd. | London | 2018 |
| Aden & Co Solicitors Ltd | Southhall | 2016 |
| Aden Aviation Ltd | London | 2025 |
| Aden Consultancy Limited | Daventry | 2011 |
| Aden Consultants Ltd | Harrow | 1997 |
| Aden Cuciniello Limited | Wellington | 2018 |
| Aden Finance Limited | London | 2018 |
| Aden Media Ltd | Dorking | 2021 |
| Aden Solutions Limited | Middlesex | 2014 |
| Aden Yachting Limited | London | 2024 |
| Adena Accountancy Ltd | Oldham | 2025 |
| Adena Street Limited | London | 2025 |
| Adenaya Solutions Ltd | Southampton | 2020 |
| Adend Ltd | London | 2024 |
| Adendale Limited | Chippenham | 2006 |
| Adendra Therapeutics Limited | Potters Bar | 2021 |
| Adenea Consulting Limited | Bury St. Edmunds | 2009 |
| Adeney Cullen Ltd | London | 2024 |
| Adengreen Limited | Glasgow | 2013 |
| Adeni Limited | Ammanford | 2002 |
| Adenik Limited | Manchester | 2024 |
| Adenike Consulting Limited | London | 2026 |
| Adenine Group Ltd | London | 2025 |
| Adenium Ltd | London | 2026 |
| Adenle Networking Limited | London | 2012 |
| Adensi Limited | Edinburgh | 2006 |
| Adentic Ltd | Wallington | 2025 |
| Adenusi & Company Limited | Chatham | 2024 |
| Adenwood Limited | Northampton | 1972 |
| Adenza Solutions Limited | Harpenden | 2010 |
| Adeo Global Consulting Ltd | Horsham | 2005 |
| Adeola Patronne Ltd | Telford | 2021 |
| Adeon Creative Limited | Southampton | 2016 |
| Adep Consulting Limited | Bristol | 2025 |
| Adep Limited | Nr Buxton | 2006 |
| Adepa Consulting Ltd | Leicester | 2025 |
| Adepin Consulting Ltd | London | 2021 |
| Adept (Business Psychology) Limited | Kingsbridge | 2001 |
| Adept - Construction Consultants Ltd | Whetstone | 2018 |
| Adept Accountancy and Consultancy Services Limited | Southampton | 2022 |
| Adept Accountax Ltd | Mitcham | 2020 |
| Adept Accounts Services Limited | Wolverhampton | 2020 |
| Adept Advisors Ltd | Mitcham | 2021 |
| Adept Advisory Limited | West Byfleet | 2013 |
| Adept Air Ltd | Swindon | 2026 |
| Adept Aviation Solutions Ltd | Shaftesbury | 2021 |
| Adept Biologica Consulting Limited | London | 2020 |
| Adept BS Limited | Bournemouth | 2015 |
| Adept Building Consultancy Ltd | Newcastle Upon Tyne | 2023 |
| Adept Business Management Consultants Limited | Liverpool | 2016 |
| Adept Care Homes Limited | Hinckley | 2004 |
| Adept Certification Ltd | Lydney | 2026 |
| Adept Change Ltd | Pencaitland | 2015 |
| Adept Circuits Ltd. | Salisbury | 2011 |
| Adept Construction East Anglia Ltd | Colchester | 2018 |
| Adept Consultancy Group Ltd | London | 2026 |
| Adept Consultancy UK Limited | Exeter | 2009 |
| Adept Consulting (UK) Ltd | Chepstow | 2008 |
| Adept Consulting Engineers (Birmingham) Limited | Pudsey | 2025 |
| Adept Consulting Engineers (Manchester) Limited | Manchester | 2019 |
| Adept Consulting Engineers Ltd | Farsley | 2006 |
| Adept Denovo Limited | West Byfleet | 2014 |
| Adept Dental Ltd | Cirencester | 2013 |
| Adept Design Ltd | Huddersfield | 2022 |
| Adept Developments Limited | Newquay | 1987 |
| Adept Digital Ltd | London | 2019 |
| Adept Dispute Resolution Ltd. | London | 2024 |
| Adept Editorial Ltd | Essex | 2007 |
| Adept Engineering Ltd | London | 2025 |
| Adept Engineering Management Limited | Nottingham | 2023 |
| Adept Enterprises Limited | Abingdon | 2012 |
| Adept Ergonomics Limited | Leicester | 2010 |
| Adept Field Solutions Limited | Kingston Upon Thames | 2010 |
| Adept Group (UK) Limited | Sutton Coldfield | 2011 |
| Adept Integrated Solutions Limited | East Boldon | 2009 |
| Adept Internal Audit Specialist Limited | Walsall | 2026 |
| Adept Law Limited | Barton Upon Humber | 2022 |
| Adept Lift Technical Services Limited | Dartford | 1988 |
| Adept Live Limited | Huddersfield | 2018 |
| Adept Logistics Limited | Falmouth | 2004 |
| Adept Management Group Ltd | Ashford | 2004 |
| Adept Management Limited | Woodstock | 2000 |
| Adept Marketing Services Ltd | Wolverhampton | 2020 |
| Adept Medical Reports Limited | Manchester | 2013 |
| Adept Medicare Limited | Fareham | 2006 |
| Adept NDT & Weld Inspection Ltd | Gillingham | 2017 |
| Adept Optical Ltd | Edinburgh | 2011 |
| Adept Originals Ltd | London | 2023 |
| Adept Photography Limited | Liverpool | 2013 |
| Adept Piping Ltd | Beverley | 2012 |
| Adept Product Design & Supply Solutions Limited | Ashbourne | 2025 |
| Adept Project Management Limited | Bolton | 2018 |
| Adept Projects Limited | Chichester | 2023 |
| Adept Property Consultants Limited | Bishop'S Stortford | 2017 |
| Adept Residential Limited | Ballynahinch | 2026 |
| Adept Safety Management Ltd | Bury St. Edmunds | 2010 |
| Adept Site Services Ltd | Wakefield | 2020 |