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| 115 Portobello Road Limited | London | 2003 |
| 115 South Street Ltd | Woodford Green | 2025 |
| 115 Wilsham Street Ltd | Diss | 2025 |
| 115 Wilsham Street Properties Ltd | Diss | 2025 |
| 11552949 Ltd | Peterborough | 2018 |
| 115G Ltd. | London | 2010 |
| 1163 Ltd | Leicester | 2021 |
| 1169 Limited | Hemel Hempstead | 2014 |
| 116B Watford High Street 2018 Limited | London | 2018 |
| 116LRR Limited | Nottingham | 2024 |
| 117 Builders Ltd | Borehamwood | 2019 |
| 118 Construction Limited | Harlow | 2023 |
| 118 Demolition Ltd | Hitchin | 2020 |
| 118 Foundations Limited | Whitworth | 2007 |
| 118 GAS Ltd | Hayling Island | 2021 |
| 118 Kensington Park Road Limited | London | 2009 |
| 119 Dorking Limited | Romford | 2023 |
| 11:11 Design and Build Ltd | Slough | 2018 |
| 11:11 Limited | Brighton | 2022 |
| 11:88 Management Ltd | Manchester | 2020 |
| 11ARCHES Construction Limited | Bishop Auckland | 2025 |
| 11MST Ltd | Lisburn | 2020 |
| 11TH Hour Building Solutions Ltd | Hounslow | 2017 |
| 11TH Hour Innovation Properties Ltd | Camberwell | 2022 |
| 12 14 Healthcare Ltd | Peterborough | 2025 |
| 12 Chipstead ST Ltd | Crawley | 2020 |
| 12 Electrical & Emergency Electrician Ltd | Cardiff | 2025 |
| 12 Harrowdene Limited | Hounslow | 2016 |
| 12 Market Place Kettering Limited | Farnborough | 2021 |
| 12 Northwick Terrace Limited | London | 2003 |
| 12 Park Avenue Dover Management Limited | Maidstone | 2012 |
| 12 Property FE Limited | Uxbridge | 2014 |
| 12 Stars Properties Ltd | Doncaster | 2024 |
| 12 TLB Limited | London | 2025 |
| 12-22 Finchley Road Developments Limited | London | 2015 |
| 12/10 Constructions Ltd | Suffolk | 2026 |
| 120 Archway Road Limited | London | 2023 |
| 120 Fire Ltd | London | 2023 |
| 12037781 Ltd | Bury St. Edmunds | 2019 |
| 120B Acton Lane Limited | London | 2014 |
| 121 Asset Management Ltd | Cannock | 2021 |
| 121 Construction Ltd | London | 2025 |
| 121 Fonthill Properties Ltd | London | 2021 |
| 121 Glass Merchants Ltd | Clevedon | 2016 |
| 121 Mountco 074 Limited | Harrogate | 2006 |
| 1214 Developments Ltd | Manchester | 2020 |
| 12213407 Ltd | Cardiff | 2019 |
| 12269470 Ltd | Hounslow | 2019 |
| 123 AP Developments Limited | London | 2019 |
| 123 Bathrooms Ltd | Selby | 2022 |
| 123 Construction Group Ltd | Quarry Wood | 2020 |
| 123 Constructions Limited | Manchester | 2014 |
| 123 Electricians Limited | Royal Victoria Docks | 2017 |
| 123 Fencing Ltd. | Alloa | 2024 |
| 123 Fire Limited | Goole | 2011 |
| 123 Floors Southern Limited | Portsmouth | 2020 |
| 123 Heat Limited | Keston | 2020 |
| 123 Hvac Ltd | London | 2026 |
| 123 Ideas Limited | London | 2024 |
| 123 Property Development Ltd | Wellingborough | 2024 |
| 123 Property Maintenance Limited | Birmingham | 2017 |
| 123 Renovations Ltd | Sutton | 2021 |
| 123 Site Solutions Ltd | London | 2024 |
| 123 Surveyors Ltd | London | 2021 |
| 123 Water Gardens Limited | London | 2021 |
| 123-125 Merton Road Development Limited | London | 2019 |
| 123BLACKPOOL Ltd | Blackpool | 2024 |
| 123EVPV Ltd | Sanquhar | 2022 |
| 123KITCHENS Limited | Doncaster | 2023 |
| 123LOFTS Ltd | Keston | 2023 |
| 123PS Ltd | Market Bosworth | 2021 |
| 123STONE Builders Ltd | Birkenhead | 2019 |
| 123UPVC Limited | Aylesbury | 2007 |
| 123WOODWORKS Ltd | Sevenoaks | 2025 |
| 126 Baker Street Limited | London | 2023 |
| 126 BPM Ltd | High Wycombe | 2024 |
| 126 High Street Limited | Southampton | 2010 |
| 126 the Boulevard Limited | Hull | 2007 |
| 126BUILDING Ltd | Birmingham | 2024 |
| 127 Canterbury ST Ltd | Dartford | 2024 |
| 127 Consultancies Limited | Bedford | 2017 |
| 127 Cwmgarw Road Ltd | London | 2026 |
| 127 Joint Venture Limited | Bedford | 2018 |
| 127 Portobello Road Limited | London | 2020 |
| 127 ST Albans Road Limited | Luton | 2012 |
| 128 Builds Limited | Droitwich | 2025 |
| 128 SHR Ltd | London | 2021 |
| 128 the Grove (Ealing) Management Company Limited | London | 1989 |
| 12808223 Limited | Cardiff | 2020 |
| 12850583 Limited | Manchester | 2020 |
| 12859826 Ltd | Cardiff | 2020 |
| 129 Holdings Sutton Coldfield Ltd | Birmingham | 2018 |
| 12A Southey Street Management Co. Limited | London | 2008 |
| 12C Developments Ltd | Solihull | 2024 |
| 12G Electrical Solutions Ltd | Gillingham | 2025 |
| 12HP Limited | London | 2021 |
| 13 Bar Limited | Leeds | 2019 |
| 13 Holland Park Limited | London | 2015 |
| 13 Maple Avenue Limited | Hyde | 2021 |