| Adept Groundwork Services Ltd | Portsmouth | 2025 |
| Adept Groundworks Limited | Pewsey | 2017 |
| Adept Heating & Plumbing Limited | Reading | 2010 |
| Adept Heating Services Ltd | Cheltenham | 2014 |
| Adept Home Improvements Limited | Motherwell | 2016 |
| Adept Homes Ltd | Carluke | 2019 |
| Adept Interior Installation Limited | Milford Haven | 2019 |
| Adept Interiors Limited | Aylesbury | 2016 |
| Adept Mechanical Services Ltd | Leigh-On-Sea | 2025 |
| Adept MEZZA9 Ltd | Nottingham | 2015 |
| Adept Modern Enterprises Ltd | Newcastle Upon Tyne | 2024 |
| Adept Multi Trade Limited | Glasgow | 2022 |
| Adept New Builds Ltd | Wirral | 2021 |
| Adept Plumbing & Heating Solutions Ltd | Luton | 2019 |
| Adept Property Development Limited | Marston Green | 2021 |
| Adept Property Repairs & Maintenance Ltd | Manchester | 2025 |
| Adept Property Solutions Limited | March | 2007 |
| Adept Refrigeration Limited | Ashford | 2021 |
| Adept Roofing & Maintenance Limited | London | 2015 |
| Adept Roofing & Property Solutions Ltd | Norwich | 2026 |
| Adept Roofing & Scaffolding Contractors Limited | Buckingham | 2019 |
| Adept Roofing Limited | Manchester | 2004 |
| Adept Scaffolding (NW) Ltd | Blackpool | 2025 |
| Adept Scaffolding Ltd | Enfield | 2022 |
| Adept Security Systems Limited | Road Wolverhampton | 1996 |
| Adept Structural Solutions (UK) Ltd | Chepstow | 2017 |
| Adept Sussex Limited | Seaford | 2020 |
| Adept Technical Solutions Limited | Winchester | 2018 |
| Adept Warehouse Solutions Ltd | London | 2026 |
| Adeptly Limited | London | 2003 |
| Adeptus Electrical Services Ltd | Glasgow | 2024 |
| Adeptus Group Ltd | Southampton | 2020 |
| Adeq Ltd | Milton Keynes | 2014 |
| Aderail Limited | London | 2023 |
| Aderans Building Ltd | Sheffield | 2025 |
| Aderans Invest Limited | Sheffield | 2018 |
| Ades Contractor Limited | London Barnet | 2016 |
| Ades-Cov Ltd | Coventry | 2021 |
| Adesan Construction & Decoration Ltd | London | 2020 |
| Adesanya&Co Limited | Edinburgh | 2008 |
| Adesen Engineering Services Limited | Grays | 2022 |
| Adesmo UK Limited | Barking | 2018 |
| Adess Limited | Newcastle Upon Tyne | 2024 |
| Adesso Properties Ltd | London | 2023 |
| Adesther Ltd | Purfleet | 2014 |
| Adestyvn Builds Limited | Rochdale | 2019 |
| Adet Advisory Ltd | Morpeth | 2025 |
| Adeva Rail Ltd | Tilbury | 2025 |
| Adewara Enterprise Ltd | London | 2018 |
| Adex Construction and Plants Limited | Gravesend | 2014 |
| Adex Demolition Services Limited | Aldershot | 2012 |
| Adex Drilling Services (UK) Limited | Aldershot | 2012 |
| Adex Interiors for Industry Ltd | Leighton Buzzard | 1979 |
| Adex Plumbing and Facilities Services Limited | London | 2024 |
| Adex Solutions International Ltd | Manchester | 2024 |
| Adexsi UK Ltd | Barry | 2009 |
| Adexx Limited | Harlow | 2017 |
| Adeya Property Engineering Limited | London | 2025 |
| ADF Brickwork Ltd | Falkirk | 2022 |
| ADF Building Services Ltd | Herstmonceux | 2019 |
| ADF Construction and Developments Ltd | Newcastle Under Lyme | 2013 |
| ADF Construction Limited | Dudley | 2020 |
| ADF Construction Services Limited | Manchester | 2025 |
| ADF Electrical Ltd | Surbiton | 2021 |
| ADF Electrical Services Ltd | Newcastle Under Lyme | 2021 |
| ADF Installation Limited | Coventry | 2021 |
| ADF London Ltd | London | 2015 |
| ADF Maintenance and Management Ltd | Paisley | 2026 |
| ADF Marine Limited | London | 2025 |
| ADF Mechanical Ltd | Newcastle | 2025 |
| ADF Mechanical Services Ltd | Croydon | 2009 |
| ADF Plastics Limited | Plymouth | 2008 |
| ADF Property Services Ltd | Surbiton | 2021 |
| ADF Roofing Services Ltd | Newcastle Under Lyme | 2026 |
| ADF Scaffolding Ltd | Croydon | 2014 |
| ADF Signature Homes Ltd | Newcastle Under Lyme | 2016 |
| Adfercymru Ltd | Merthyr Tydfil | 2021 |
| Adferm Builders Limited | Glasgow | 2023 |
| Adff Rail Ltd | London | 2015 |
| Adfield Electrical Limited | Rustington | 2020 |
| Adfinishers Limited | Gosport | 2016 |
| Adfloor Industrial Limited | Brierley Hill | 1998 |
| ADG (Electrical) Limited | Fair Oak | 2022 |
| ADG Build Ltd | London | 2020 |
| ADG Building & Property Maintenance Ltd | Bournemouth | 2023 |
| ADG Building and Joinery Ltd | Warrington | 2025 |
| ADG Buillding Ltd | Dagenham | 2018 |
| ADG Church Limited | Glasgow | 2025 |
| ADG Commercial & Domestic Ltd | Reading | 2023 |
| ADG Construction Ltd | Northampton | 2023 |
| ADG Living Limited | Chester | 2022 |
| ADG Networks Ltd | London | 2019 |
| ADG Plumbing & GAS Ltd | Clydebank | 2019 |
| ADG Plumbing & Heating Limited | London | 2010 |
| ADG Property Investments Ltd | Bilston | 2019 |
| ADG Railway Ltd | Gainsborough | 2024 |
| ADG Scaffolding Ltd | Newton-Le-Willows | 2023 |
| ADG Specialists Ltd | Macduff | 2022 |
| ADG Systems PLC | Camberley | 1990 |
| ADG Teesside Limited | Saltburn-By-The-Sea | 2018 |