| 53 Tollington Way London Limited | London | 2004 |
| 53 WER Ltd | London | 2016 |
| 533 Garratt Lane Limited | London | 2006 |
| 535-539 Harrow Road (Freehold) Limited | Angmering | 2017 |
| 5391741RH-AU Limited | Wellingborough | 2017 |
| 54 & 58 High Street Corsham Limited | Saltash | 2002 |
| 54 Albert Road Management Co Ltd | Plymouth | 1997 |
| 54 Barnsbury Road Limited | Birmingham | 2004 |
| 54 Blenheim Park Road Freehold Limited | South Croydon | 2011 |
| 54 Fulham Park Gardens Limited | | 1995 |
| 54 Goldsboro Road Freehold Limited | London | 2007 |
| 54 Mount Pleasant Road RTM Company Limited | London | 2014 |
| 54 Oval Road Freehold Management Company Limited | East Croydon | 2005 |
| 54 Southbourne Road (Freehold) Limited | Dorset | 2006 |
| 54-60 Shirley Drive "RTM" Company Limited | Worthing | 2010 |
| 540 SO Limited | London | 2014 |
| 542 Uxbridge Road Limited | Pinner | 2007 |
| 546 Caledonian Road (Management) Limited | | 1980 |
| 55 Cambridge Grove Limited | London | 2003 |
| 55 Cromford Road Limited | London | 2004 |
| 55 Degrees North RTM Company Limited | Newcastle Upon Tyne | 2013 |
| 55 Marylands Road RTM Company Limited | London | 2010 |
| 55 Moore Park Road Limited | London | 2009 |
| 55 Parliament Hill Limited | London | 2000 |
| 55 Percy Road Limited | | 2000 |
| 55 the Downs Residents Limited | Herne Bay | 2003 |
| 55 Truro Road Freehold Limited | | 2004 |
| 55 Venn Street Management Limited | London | 2006 |
| 55-57 Malone Road Management Limited | Belfast | 2000 |
| 55-59 Ipswich Street Management Company Ltd | Eye | 2008 |
| 550 Castle Lane West Limited | Bournemouth | 2014 |
| 555DIAMOND Ltd | Manchester | 2023 |
| 55A Chadwick Road Management Company 2015 Limited | London | 2015 |
| 55H Models Ltd | Naburn | 1988 |
| 56 Addison Gardens Limited | London | 2013 |
| 56 Aslett Street Limited | Abergavenny | 2001 |
| 56 Beach Avenue (Freehold) Limited | Leigh On Sea | 2013 |
| 56 Brecon Road Management Company Limited | Usk | 2005 |
| 56 Corwell Lane (Management) Limited | Middlesex | 2006 |
| 56 Dudley Road Management Company Limited | Kent | 1992 |
| 56 Heathfield Road Limited | London | 2013 |
| 56 Kenninghall Road Limited | | 2005 |
| 56 Leopold Road Ltd | London | 1991 |
| 56 Mount Pleasant Lane Management Limited | London | 2014 |
| 56 Rosslyn Hill Limited | London | 1996 |
| 565 London Road (Management) Limited | Solihull | 2014 |
| 567342 Limited | Wellingborough | 2017 |
| 57 Ashbourne Limited | London | 2017 |
| 57 Becmead Avenue Ltd | London | 2014 |
| 57 Bonnington Square Ltd | London | 2016 |
| 57 Chepstow Place (Management) Limited | | 1992 |
| 57 Coleridge Street (Hove) Limited | Hove | 2012 |
| 57 Holland Park Management Limited | Hawksworth | 1987 |
| 57 Stars UK Ltd | Altrincham | 2023 |
| 57, 59, & 61 Crookham Road Limited | London | 1985 |
| 57L Limited | Birmingham | 2009 |
| 58 Allestree Road Limited | | 2004 |
| 58 Birnam Road Ltd | London | 2013 |
| 58 Brooke Road Limited | London | 2017 |
| 58 Colebrooke ROW Management Company Limited | Bromley | 2017 |
| 58 Eaton Mews North Ltd | London | 2014 |
| 58 Elgin Crescent Management Company Limited | London | 1986 |
| 58 Elmwood Road (Freehold) Limited | London | 2014 |
| 58 Eton Avenue Limited | Angmering | 1980 |
| 58 Gifford Terrace Road Management Company Limited | Plymouth. | 1986 |
| 58 Gladstone Place Limited | Hove | 2014 |
| 58 Loveridge Road Limited | London | 1998 |
| 58 Marsham Street Management Company Limited | Lingfield | 2006 |
| 58 Patrick Street Management Company Limited | Solihull | 2008 |
| 58-60 POW Limited | London | 2004 |
| 586 Sports Ltd | Syresham | 2000 |
| 58:12 Enterprises Limited | Purley | 2021 |
| 59 Balcombe Street Limited | London | 2010 |
| 59 Cadogan Place Limited | London | 2004 |
| 59 Cantelupe Road Limited | Bexhill-On-Sea | 2004 |
| 59 Digby Crescent Management Company Limited | | 2006 |
| 59 Gordon Road (Shoreham) Limited | Shoreham-By-Sea | 2014 |
| 59 Mount Avenue Residents Limited | London | 1998 |
| 59 ST Ives Ltd | Plymouth | 2006 |
| 59 Thornhill Park Management Limited | Southampton | 2002 |
| 59 Warwick Road Management Limited | Croydon | 2014 |
| 597 Edin Ltd. | Edinburgh | 2005 |
| 599 Scottaxis Limited | Tranent | 2020 |
| 5ALE Ltd | Harrogate | 2015 |
| 5C Trading Limited | Manchester | 2014 |
| 5CX Limited | Manchester | 2024 |
| 5D NET Zero Ltd | Bristol | 2022 |
| 5D Sustainability Ltd | Bristol | 2026 |
| 5EXY Ltd | Harrogate | 2015 |
| 5FOUR Payroll Bureau Limited | Hull | 2009 |
| 5G Futures Limited | Ellesmere Port | 2008 |
| 5G Limited | High Wycombe | 2010 |
| 5M Academy Limited | Stoke-On-Trent | 2019 |
| 5MITHS Ltd | Harrogate | 2015 |
| 5OLAR Pannels Ltd | Harrogate | 2015 |
| 5PA Ltd | Harrogate | 2015 |
| 5PAY Solution Ltd | London | 2023 |
| 5PB Limited | London | 2010 |
| 5PORT Ltd | Harrogate | 2015 |
| 5POT Ltd | Harrogate | 2015 |