| Active Roof Repairs Ltd | Eastleigh | 2025 |
| Active Roofcare Ltd | Accrington | 2026 |
| Active Roofing & Building Services Ltd | Kingston Upon Hull | 2023 |
| Active Roofing and Cladding Ltd | Eastleigh | 2025 |
| Active Roofing and General Builders Limited | Ruislip | 2012 |
| Active Roofing and Guttering Ltd | Kingston Upon Thames | 2020 |
| Active Roofing and Property Maintenance Ltd | Berkhamsted | 2023 |
| Active Roofing Ltd | Rochdale | 2022 |
| Active Scaffolding Cheltenham Ltd | Cheltenham | 2025 |
| Active Scaffolding Limited | Chislehurst | 2006 |
| Active Security Systems Limited | Stockport | 2003 |
| Active Security UK Limited | Bromyard | 2003 |
| Active Sports Construction Ltd | Stanmore | 2018 |
| Active Structure Ltd | Palmers Green | 2020 |
| Active Surfaces Ltd | Warrington | 2017 |
| Active Systems Limited | Edenbridge | 2025 |
| Active Trade Point Limited | Worthing | 2018 |
| Active Traffic Management Solutions Ltd | Lesmahagow | 2015 |
| Active Tunnelling Construction Limited | Exhall | 2007 |
| Active Tunnelling Limited | Coventry | 1994 |
| Active Urban Property Group Limited | London | 2009 |
| Active Visual Supplies Limited | Telford | 1994 |
| Active Windows Ltd | West Wellow | 2020 |
| Active Works Limited | Kingston Upon Hull | 2003 |
| ACTIVE8 Builders & Joiners Ltd | Pontefract | 2011 |
| ACTIVE8 Building Limited | Nottingham | 2008 |
| ACTIVE8COMMUNICATIONS Limited | Redhill | 2024 |
| ACTIVE8SECURITY Ltd | Ashton-Under-Lyne | 2026 |
| Activefixers Ltd | Milton Keynes | 2016 |
| Activeforce Limited | Glos | 1983 |
| Activegas GB 24/7 Ltd | Romford | 2025 |
| Activeman Construction Limited | Thornton Heath | 2024 |
| Activepine Limited | Birmingham | 1986 |
| Activeuk Ltd | Wolverhampton | 2025 |
| Activeworkers Ltd | London | 2025 |
| Activheat (UK) Limited | Kettering | 2007 |
| Activia Solar Ltd | Watford | 2012 |
| Activo Care Maintenance Limted Limited | Wolverhampton | 2025 |
| Actm U.K. Limited | London | 2022 |
| Acton & FOX Limited | Whitehaven | 2021 |
| Acton Access Scaffolding Ltd | Long Eaton | 2023 |
| Acton Brickwork Ltd | Warrington | 2021 |
| Acton Building Company Limited | Derby | 2016 |
| Acton Building Contractors Ltd | London | 2026 |
| Acton Building Services Ltd | Worcester | 2020 |
| Acton Capital Limited | London | 2026 |
| Acton Developments Limited | Leicester | 2022 |
| Acton Electrical Ltd | Dunstable | 2025 |
| Acton GAS Plumbing and Heating Limited | Sudbury | 2023 |
| Acton Grange Properties Limited | Warwickshire | 1987 |
| Acton Green Sash Windows Ltd | Staines | 2014 |
| Acton Group NW Limited | Manchester | 2015 |
| Acton Group Services Limited | Preston | 2018 |
| Acton Handyman Services Ltd | Edgware | 2023 |
| Acton Homes Limited | Bristol | 2001 |
| Acton Lane (London) Limited | London | 2014 |
| Acton Lane Development Ltd | Park Royal | 2025 |
| Acton Lane II (London) Limited | London | 2018 |
| Acton LEA Developments Limited | Sutton Coldfield | 2021 |
| Acton Living Limited | Leamington Spa | 2026 |
| Acton Round Builders Limited | Bridgnorth | 2003 |
| Acton Stone Ltd | Stafford | 2025 |
| Acton Valley Developments Ltd | Sleaford | 2017 |
| Acton Warner Limited | Maidstone | 2017 |
| Actondain Limited | Bedford | 1988 |
| Actondev Limited | Peterborough | 2023 |
| Actoris Chippenham Limited | Cardiff | 2025 |
| Actoris Property Limited | Cardiff | 2017 |
| Actotap Ltd | Cranbrook | 2020 |
| Actp Ltd | London | 2018 |
| Acts 9 Developments Ltd | Northamptonshire | 2021 |
| Acts Maintenance Solutions Ltd | St Helens | 2010 |
| Acts Partnership (Services) Limited | Glasgow | 1998 |
| Actsure Systems Limited | Luton | 1991 |
| Actt Developments Limited | Peterborough | 2018 |
| Actual AI Ltd | Grimsby | 2025 |
| Actual Construction Ltd | London | 2025 |
| Actual Electrical Limited | Surrey | 2007 |
| Actual Landscapes Ltd | Mold | 2017 |
| Actual Projects Ltd | London | 2006 |
| Actual Roofing Ltd | Cheltenham | 2025 |
| Actual Roofing Solutions Ltd | Chislehurst | 2011 |
| Actually Lodges Limited | Preston | 2019 |
| Actuary Insure Limited | Birmingham | 2014 |
| Actuate Electrical Limited | Petersfield | 2015 |
| Actum (Interior Fitout) Ltd | Edinburgh | 2020 |
| Actus Construction Limited | Woodford Green | 2020 |
| Actus Developments Limited | Banbury | 2020 |
| ACU Handyman Ltd | Poole | 2019 |
| ACUB3 UK Ltd | Edinburgh | 2025 |
| Acubuild Solution Ltd | Aylesbury | 2015 |
| Acucert Limited | Cambridge | 2020 |
| Acucy Homes Limited | Cardiff | 2019 |
| Acudrill Limited | Morden | 1997 |
| Acuk HLD Ltd | Shoreham By Sea | 2025 |
| Aculga Ltd | Woking | 2024 |
| Acumen Building Solutions Ltd | Wigan | 2022 |
| Acumen Claims Limited | Annesley | 2009 |
| Acumen Construction Group Ltd | Ilford | 2018 |
| Acumen Construction Services Limited | Marlow | 2004 |