| 12 Seymour Road Limited | London | 2007 |
| 12 Smithfield Nominee NO.1 Limited | London | 2007 |
| 12 Smithfield Nominee NO.2 Limited | London | 2007 |
| 12 ST Helens Park Road Management Company Limited | Hastings | 2005 |
| 12 ST Lukes Road Leasehold Management Limited | Bath | 2015 |
| 12 Stoneyfields Ltd | London | 2021 |
| 12 Trading Limited | Billericay | 2009 |
| 12 Ventures Ltd | London | 2012 |
| 12-18 Cloatley Crescent (Wootton Bassett) RTM Company Limited | Swindon | 2014 |
| 12/12A Lydden Grove Management Limited | | 2007 |
| 120 Cheltenham Road Freehold Limited | London | 2018 |
| 120 Dalston Lane Limited | | 2007 |
| 120 Limited | Bristol | 1997 |
| 12083451 Limited | Reading | 2019 |
| 121 Cheyne Walk (Freehold) Limited | | 1997 |
| 121 Computers Limited | Norfolk | 2006 |
| 121 Elborough Street Limited | London | 2005 |
| 121 GAS Limited | Northampton | 2013 |
| 121 Life Coaching Ltd | Peterborough | 2006 |
| 121 Performance Academy Limited | Reading | 2018 |
| 121 Resourcing Limited | Erith | 2025 |
| 121/123 Edgeley Road Management Limited | | 2005 |
| 12184574 Limited | London | 2019 |
| 122 Copse Hill Construction Ltd | Esher | 2016 |
| 122 Drakefell Road Limited | London | 2009 |
| 122 Manor Lane Limited | London | 2005 |
| 123 Improvements Ltd | Cambridge | 2022 |
| 123 Limited | London | 2019 |
| 123 Owners Ltd | Ramsgate | 2009 |
| 123 Simples Ltd | Waterlooville | 2022 |
| 123 Sloane Street Limited | Southend-On-Sea | 2005 |
| 123 ST Johns Way Management Company Limited | London | 2005 |
| 123 Training Limited | Birmingham | 2004 |
| 1234567 Limited | London | 2008 |
| 12346693 Limited | Towcester | 2019 |
| 1235 Edin Ltd. | Bonnyrigg | 2008 |
| 123LIFT Ltd | Bristol | 2020 |
| 124 Fleet Road Limited | London | 1984 |
| 1241 Taxis Limited | Edinburgh | 2017 |
| 12416295 Ltd | Manchester | 2020 |
| 125 Hammersmith Grove Residents Management Limited | London | 2015 |
| 125 OBS (Nominees 1) Limited | London | 2006 |
| 128 Belsize Road Limited | London | 2004 |
| 129 M2 Ltd | Cranleigh | 2017 |
| 129 Newbridge Road (Bath) Limited | London | 1987 |
| 1291 Ltd | London | 2021 |
| 1297 Taxis Limited | Bonnyrigg | 2015 |
| 12BE Limited | London | 2017 |
| 12HUS Invest Limited | London | 2023 |
| 12HUS Limited | London | 2023 |
| 12TH MAN Agency Ltd | Malton | 2020 |
| 12THSTREAM Ltd | Radstock | 2024 |
| 13 (ABC) Pendle Road Management Limited | | 1998 |
| 13 Amies Street Freehold Limited | London | 2015 |
| 13 Artists Trustee Limited | Brighton | 2025 |
| 13 Bower Street Ltd | Maidstone | 2006 |
| 13 Calthorpe Road (Banbury) Limited | Banbury | 1992 |
| 13 Childebert Road Limited | Worcester | 2015 |
| 13 Cornwall Crescent London Limited | London | 2015 |
| 13 Ennismore Avenue Limited | London | 1986 |
| 13 Gowan Avenue Management Limited | Chelmsford | 2005 |
| 13 Ingles Road Folkestone (Management) Company Limited | Folkestone | 1999 |
| 13 Kingsbridge Road (Lower Parkstone) Ltd | Broadstone | 2016 |
| 13 Lambourn Road SW4 Limited | London | 2013 |
| 13 Mortimer Road (Oxford) Limited | Oxford | 2008 |
| 13 Queensdown Road Limited | Harrogate | 2007 |
| 13 Surrendale Place (London W9) Limited | London | 2011 |
| 13 Sutton Court Road Limited | London | 2001 |
| 13 Trafalgar Avenue Limited | London | 2015 |
| 130 Colindale Avenue Limited | London | 2009 |
| 130 Fenchurch Street Nominee 1 Limited | London | 2015 |
| 130 Fenchurch Street Nominee 2 Limited | London | 2015 |
| 130 Longhurst Road Management Company Limited | London | 2007 |
| 130 Rossmoor Road Limited | Poole | 2007 |
| 1304 Investments Ltd | Kirkcaldy | 2023 |
| 130R Limited | Romford | 2019 |
| 131 Holgate Road Management Co Ltd | York | 2016 |
| 131 Lansdowne Way Management Limited | London | 2003 |
| 1313 Property Limited | London | 2019 |
| 1315 Wheatley Associates Limited | Isleworth | 2022 |
| 1319 Taxis Ltd | Edinburgh | 2017 |
| 132 Wilberforce Road N4 Management Limited | Greater London | 1996 |
| 1320 Autos Ltd | Staughton Moor | 2004 |
| 1320 Ltd | Staughton Moor | 2009 |
| 1320 Mini Ltd | Staughton Moor | 2009 |
| 1320 Racing Ltd | Staughton Moor | 2009 |
| 13258877 Ltd | Manchester | 2021 |
| 13265000 Ltd. | London | 2021 |
| 133 Beaufort Street Management Limited | London | 1986 |
| 133 Brownhill RTM Company Limited | London | 2009 |
| 134 High Street Ongar Limited | Chelmsford | 2009 |
| 135 Waldegrave Road Limited | Teddington | 2009 |
| 136A Walton Road Management Limited | Chippenham | 2012 |
| 137 Southwood Lane (Freehold) Limited | Hitchin | 2014 |
| 137A Upper Hill Street RTM Company Ltd | Liverpool | 2018 |
| 138 New North Road Limited | London | 1993 |
| 138 Victoria Park Road E9 Limited | | 2006 |
| 13804263 Ltd | Cardiff | 2021 |
| 138A Fleet Limited | London | 2007 |
| 139 Iverson Limited | London | 2015 |