| 4WARD Training and Development Limited | Nottingham | 2003 |
| 4WAVE Media Ltd | Leeds | 2022 |
| 4WAVES Limited | London | 2015 |
| 4WAY Recruitment Ltd | St Ives | 2015 |
| 4WD Ltd | London | 2017 |
| 4WHEELSUK Ltd | Cardiff | 2020 |
| 4WILDLIFE Limited | Torquay | 2021 |
| 4X4 & EV Ltd | Glasgow | 2022 |
| 4X4 Adventures Scotland Ltd | Alexandria | 2020 |
| 4X4 Vehicle Hire Edinburgh Ltd | Hemel Hempstead | 2023 |
| 4X4 Vehicle Hire Heathrow Ltd | Pinner | 2022 |
| 4X4 Vehicle Hire Limited | Aylesbury | 2011 |
| 4X4 Vehicle Hire Surrey & West Sussex Limited | Worcester Park | 2025 |
| 4X4 Vehicle Hire UK Limited | Lutterworth | 2013 |
| 4XTRAHANDS Limited | Marlborough | 2001 |
| 4YOU Serv Ltd | Banbury | 2022 |
| 4YOU Solutions Ltd | Leeds | 2023 |
| 4YOUWECLEAN Ltd | Birmingham | 2024 |
| 4Z Alpha Ltd | Ware | 2024 |
| 5 A.M. Contract Cleaners Limited | Fleetwood | 2010 |
| 5 Apsley Terrace Management Ltd | Barnstaple | 2021 |
| 5 Aristotle Management Limited | Guildford | 2014 |
| 5 Atlantic Limited | Mitcham | 2016 |
| 5 Axis Recruitment Limited | Colne | 2024 |
| 5 Castlebar Property Management Ltd | Ealing | 2017 |
| 5 Deep Limited | Otley | 2001 |
| 5 Drive Marketing Ltd | Motherwell | 2025 |
| 5 Element Marketing Limited | Reading | 2016 |
| 5 Fishpond Drive Property Management Limited | Nottingham | 2005 |
| 5 Hertford Street (Trading) Limited | London | 2010 |
| 5 Hertford Street Limited | London | 2009 |
| 5 Hertford Street Nominees Limited | London | 2010 |
| 5 Incorporated Ltd | Banstead | 2016 |
| 5 Knights Security Ltd | Southampton | 2024 |
| 5 Legal Limited | Chorley | 2015 |
| 5 Lion Ltd | Reading | 2026 |
| 5 Mill Management Limited | Ludlow | 2008 |
| 5 Oceans Limited | Coventry | 2004 |
| 5 Pearl Recruitment Limited | Wellingborough | 2019 |
| 5 Percent Plus Limited | Wrexham | 2015 |
| 5 Pillar Agency Ltd | London | 2026 |
| 5 Power Ltd | Morden | 2018 |
| 5 Pump Court Limited | 3 Dorset Rise | 2011 |
| 5 Rivers Services Limited | Romford | 2020 |
| 5 Safety Limited | Gloucester | 2014 |
| 5 SAH Services Limited | London | 2022 |
| 5 Sedlescombe Road Limited | London | 2020 |
| 5 Sense Energetic Concepts Limited | Glasgow | 2014 |
| 5 Sigma Rigging Limited | Wirral | 2026 |
| 5 Squires Limited | Wednesbury | 2012 |
| 5 ST James's Gardens Limited | Maidenhead | 2023 |
| 5 Star Apartments Limited | Harrow | 2008 |
| 5 Star Business Support Ltd | London | 2022 |
| 5 Star Car Rentals Ltd | London | 2026 |
| 5 Star Car Wash Falkirk Ltd | Falkirk | 2025 |
| 5 Star Changeovers Limited | London | 2025 |
| 5 Star Clean and Shine Ltd | Exeter | 2026 |
| 5 Star Cleaning - South Lakes Ltd | Barrow-In-Furness | 2020 |
| 5 Star Cleaning Worcester Ltd | Worcester | 2025 |
| 5 Star Diamond Car Wash Limited | Birmingham | 2021 |
| 5 Star Eco Clean Commercial Cleaning Ltd | Salford | 2018 |
| 5 Star Eco Clean Ltd | Salford | 2022 |
| 5 Star Eco Cleaning Ltd | Salford | 2024 |
| 5 Star Facility Management Limited | Norwich | 2006 |
| 5 Star Fitness (Wetherby) Limited | Harrogate | 2011 |
| 5 Star Gardens Ltd | Basingstoke | 2015 |
| 5 Star Guarding Limited | Birmingham | 2023 |
| 5 Star Gutter Cleaning Services Ltd | Coalville | 2017 |
| 5 Star Hand Car Wash and Valeting Limited | Thornton Heath | 2024 |
| 5 Star JET Washing Ltd | Worcester | 2023 |
| 5 Star Landscape Solutions Limited | London | 2026 |
| 5 Star Loos Ltd | Northampton | 2015 |
| 5 Star North East Ltd | Newcastle Upon Tyne | 2017 |
| 5 Star Office Ltd | Winchester | 2020 |
| 5 Star Parking Limited | London | 2017 |
| 5 Star Pest Control (IW) Ltd | Ringwood | 2018 |
| 5 Star Residential Children Care Ltd | London | 2026 |
| 5 Star Security Services Ltd | Chesham | 2012 |
| 5 Star Super Hand Car Wash Ltd | Ammanford | 2025 |
| 5 Star Taxi Rentals Limited | Preston | 2024 |
| 5 Star Team Cleaning Company Ltd | Chelmsford | 2017 |
| 5 Star Tennis Holidays Limited | London | 2011 |
| 5 Star Travel HFD Ltd | Huddersfield | 2024 |
| 5 Star Valeting Ltd | Shipley | 2025 |
| 5 Stars Cleaning Co (Services) Limited | London | 2023 |
| 5 Stars Cleaning Services Ltd | Coventry | 2019 |
| 5 Stars Valeting Ltd | Birmingham | 2024 |
| 5 Stone Buildings Seminars Ltd | East Grinstead | 2015 |
| 5 Stories Ltd | Wokingham | 2020 |
| 5 TEN West Limited | Horsham | 2014 |
| 5 the Glen Management Company Limited | Bristol | 1979 |
| 5 Towns Plumbing & Heating Contractors Limited | Castleford | 2006 |
| 5 Upper Belmont Road Management Company Limited | Bristol | 2010 |
| 5 Upper East Hayes Bath Limited | Teignmouth | 2005 |
| 5 Upper Maze Hill Limited | E Sussex | 2006 |
| 5 Waterloo Street Limited | Brighton | 2005 |
| 5 Ways Cleaning Ltd | High Peak | 2020 |
| 5 Western Road Littlehampton Freehold Ltd | Littlehampton | 2019 |
| 5 Wise Monkeys Ltd | London | 2014 |
| 5-IR Ltd | Ilkeston | 2015 |