| 4EVER Constructions Ltd | Middlesex | 2006 |
| 4EVER Flash Ltd | Morden | 2019 |
| 4EVER24 Limited | London | 2022 |
| 4EVERBUILD Ltd | Leeds | 2022 |
| 4EVERE Construction Ltd | Slough | 2023 |
| 4EVERGROWING Ltd | Slough | 2025 |
| 4EVERWOOD Limited | Norwich | 2007 |
| 4F Building and Construction Ltd | London | 2023 |
| 4FACILITIES Limited | Eastbourne | 2015 |
| 4FIFTY4 Limited | Stratford-Upon-Avon | 2025 |
| 4FORTY3THREE Electrical Limited | Grantham | 2020 |
| 4FRONTWINDOWS Limited | Avon | 2019 |
| 4FS Building Solutions Limited | Shipley | 2014 |
| 4FUTURUM Ltd | Leamington Spa | 2021 |
| 4G Build Limited | London | 2017 |
| 4G Building Projects Ltd | Wetherby | 2024 |
| 4G Building Solutions Limited | Hayling Island | 2015 |
| 4G Carpentry Limited | Norwich | 2026 |
| 4G Construction Ltd | Braintree | 2012 |
| 4G Construction SW Ltd | Bideford | 2025 |
| 4G Developments 26 Ltd | Cardiff | 2026 |
| 4G Developments Ltd | Trowbridge | 2014 |
| 4G Electrical Services Limited | Ormskirk | 2012 |
| 4G Roofing & Building Ltd | Reigate | 2025 |
| 4G Utilities Ltd | Rayleigh | 2014 |
| 4G-EV Ltd | Stockport | 2022 |
| 4G1B Electrical Services Limited | Weston-Super-Mare | 2022 |
| 4GATE Limited | Hatfield | 2025 |
| 4GH UK Limited | Iver | 2019 |
| 4GRANTED Services Ltd | London | 2022 |
| 4H Alpha Properties Ltd | Swindon | 2026 |
| 4H Construction & Consultancy Ltd | Nottingham | 2021 |
| 4H Developments Ltd | Stockport | 2024 |
| 4H Houses & Homes Ltd | Swindon | 2022 |
| 4H Scaffolding Services Ltd | Grays | 2019 |
| 4HANDS Gardening Ltd | Teddington | 2024 |
| 4HANDS Services Limited | Cardiff | 2021 |
| 4HD Limited | Glasgow | 2019 |
| 4HEATONS Builders Limited | Stockport | 2011 |
| 4HK Builders Ltd | Oxford | 2021 |
| 4HUGI Ltd | Kirkby Stephen | 2020 |
| 4HZG Energy Systems Limited | London | 2026 |
| 4I Civils & Groundworks Ltd | Bury St. Edmunds | 2026 |
| 4IR Ltd | Crymych | 2023 |
| 4J Ltd | London | 2018 |
| 4JAMZ Ltd | Bangor | 2013 |
| 4JH Ltd | Eastleigh | 2022 |
| 4JX Ltd | Bedford | 2026 |
| 4K Alton Limited | London | 2026 |
| 4K Builders Ltd | Sutton | 2018 |
| 4K Construction Limited | Bodmin | 2017 |
| 4K Contracts Ltd | Henlow | 2022 |
| 4K Developments Limited | Norwich | 2026 |
| 4K Estate Limited | London | 2018 |
| 4K Group Limited | London | 2025 |
| 4K Liss Limited | London | 2026 |
| 4K London Limited | Henlow | 2025 |
| 4K Maintenance & Facility Solutions Ltd | Dundee | 2023 |
| 4K Services Limited | East Grinstead | 2025 |
| 4K Wendover Limited | London | 2026 |
| 4KAST Ltd | Liverpool | 2008 |
| 4KC Developments Limited | London | 2022 |
| 4L Solutions Limited | Deeside | 2024 |
| 4LEAF South Ltd | Bournemouth | 2025 |
| 4LIFE Building and Landscaping Limited | Chatham | 2017 |
| 4LIFE Operatives Ltd | Prescot | 2015 |
| 4M Building and Maintenance Limited | Maidenhead | 2023 |
| 4M Business Limited | Northampton | 2016 |
| 4M Commercial Ltd | Leeds | 2026 |
| 4M Energy Saving Limited | Leicester | 2014 |
| 4M Floors UK Limited | Newcastle Under Lyme | 2010 |
| 4M Project Management Limited | St Austell | 2019 |
| 4M Works Limited | London | 2010 |
| 4MA Limited | London | 2008 |
| 4MAFI Limited | Edgware | 2010 |
| 4MAT Interior Contractors Ltd | Leigh-On-Sea | 2019 |
| 4MATION (SW) Limited | Exeter | 2014 |
| 4MB Builders Ltd | Birmingham | 2026 |
| 4MC Services Ltd | Southampton | 2019 |
| 4MD Devco 1 Limited | Watford | 2026 |
| 4MORE Space Limited | Rotherham | 2013 |
| 4MOST Construction Ltd | Waterlooville | 2025 |
| 4MV Ltd | London | 2021 |
| 4NBX Limited | Slough | 2026 |
| 4NE Limited | Cardiff | 2016 |
| 4NEST Concepts & Solutions Ltd | Windsor | 2025 |
| 4NEW Limited | London | 2017 |
| 4OCR Ltd | London | 2019 |
| 4ORTY4 Ltd | Aylesbury | 2011 |
| 4OURTH Generation Layzell Builders Ltd | Taunton | 2017 |
| 4P Construction Ltd | Glasgow | 2016 |
| 4P Maintenance and Construction (Sussex) Limited | East Sussex | 2005 |
| 4PK Limited | London | 2021 |
| 4PM Ltd | London | 2022 |
| 4POP.EU Ltd | Woking | 2013 |
| 4POS Limited | Liverpool | 2025 |
| 4PR Construction Services Ltd | Barking | 2023 |
| 4PRINCIPLES Construction Ltd | Ipswich | 2015 |
| 4PROCONSTRUCTION Ltd | Maesteg | 2017 |
| 4PROPERTYUK Limited | Cardiff | 2013 |