| 1-20 Thistleworth Close Isleworth Limited | Whyteleafe | 2000 |
| 1-3 Oban Road (Southend) Limited | Hockley | 2001 |
| 1-34 Collingwood Place Freehold Company (2018) Ltd. | Leatherhead | 2018 |
| 1-4 Model Farm Close Limited | London | 2000 |
| 1-4 Saffron Court Management Company Limited | Essex | 2004 |
| 1-6 Highbanks Residential Management Company Limited | Bristol | 2013 |
| 1-APART Ltd | Leigh-On-Sea | 2025 |
| 1-BILL Solutions Ltd | Ilkley | 2019 |
| 1-UP Finance Limited | Ruislip | 2025 |
| 1-Z Limited | Stockport | 2020 |
| 1.21 Media Communications Ltd. | Cirencester | 2020 |
| 1.618 Digital Ltd | London | 2015 |
| 1.RISK Solutions Consulting Limited | Shepperton | 2026 |
| 1/2ACRE Ltd | London | 2024 |
| 10 Eighty Limited | Esher | 2011 |
| 10 10 Consultancy Limited | Peterborough | 2024 |
| 10 8 Productions Limited | London | 2010 |
| 10 Adamson Road Limited | Bridgend | 1972 |
| 10 and 23 Ltd | London | 2024 |
| 10 Associates Limited | Huddersfield | 2004 |
| 10 Bausteine Ltd | Edinburgh | 2025 |
| 10 Berkeley Street Limited | London | 2002 |
| 10 Berkeley Street Management Limited | London | 1999 |
| 10 Brackenbury Gardens Limited | | 2001 |
| 10 CA Limited | Northampton | 2016 |
| 10 Cabot Square Limited | London | 1991 |
| 10 Cann Limited | Northampton | 2016 |
| 10 Church Road (Penarth) Management Company Limited | Cardiff | 2008 |
| 10 Consult Ltd | Mildenhall | 2020 |
| 10 Consulting Limited | Surbiton | 2005 |
| 10 Design Ltd. | Clydebank | 2010 |
| 10 Design Studio Ltd | Cambridge | 2024 |
| 10 Ebberley Lawn Management Co. Limited | Fremington | 2001 |
| 10 Europe Limited | Edinburgh | 2011 |
| 10 Fairholme Road Limited | Bagshot | 2008 |
| 10 Feet Tall Limited | East Grinstead | 2012 |
| 10 Fieldhouse Ltd | Nuneaton | 2019 |
| 10 Gates Ltd | Birmingham | 2011 |
| 10 Great Pulteney Street Management Company Limited | Bath | 1997 |
| 10 Guru Ltd | Cardiff | 2025 |
| 10 Kings Road Management Company Limited | Colwyn Bay | 2000 |
| 10 Leisure Limited | Aylesbury | 2014 |
| 10 Mazenod Avenue Freehold Limited | London | 2006 |
| 10 Nightingale Road Southsea RTM Company Limited | Southsea | 2009 |
| 10 on Mortiscape Ltd | London | 2025 |
| 10 Park Crescent Management (Worthing) Limited | Worthing | 2013 |
| 10 Point Design Limited | London | 2006 |
| 10 Projects Limited | Tunbridge Wells | 2019 |
| 10 Square Property Group Limited | London | 2026 |
| 10 Tenths OD Ltd | London | 2026 |
| 10 TON Gorilla Ltd | Knutsford | 2024 |
| 10 Tonbridge Limited | London | 2017 |
| 10 UHS Ltd | Epsom | 2023 |
| 10 Ventures Ltd | Grantham | 2020 |
| 10 Veronica Road Residents Association Limited | | 1993 |
| 10 West Ltd. | Wootton Bridge | 2013 |
| 10 Westbury Park (Management) Limited | Bristol | 1978 |
| 10-16 Essex Road London N1 Limited | London | 1997 |
| 10.08 Projects Limited | Aberdeen | 2001 |
| 10/10 Medical Limited | Southport | 2020 |
| 10/11 Montpelier Place Brighton Limited | Brighton | 1999 |
| 100 & First Limited | Elland | 2020 |
| 100 Above Consulting Limited | Guildford | 2022 |
| 100 Above Ltd | Salisbury | 2021 |
| 100 Acre London Ltd | London | 2024 |
| 100 Brand MAN Ltd | Hove | 2022 |
| 100 Business Loans Ltd | London | 2026 |
| 100 Days Leadership Group Limited | Bolton | 2023 |
| 100 Days Leadership Ltd | Salford | 2020 |
| 100 FS Limited | London | 2013 |
| 100 FT Limited | Belfast | 2012 |
| 100 Fundraising Ltd | London | 2020 |
| 100 Group Ltd | London | 2024 |
| 100 London Law Firm Ltd | London | 2021 |
| 100 MPH Ltd | London | 2024 |
| 100 Nine Design Limited | Burton-On-Trent | 2007 |
| 100 Percent Direct Marketing Limited | London | 2010 |
| 100 Percent Engineering Limited | Haverhill | 2019 |
| 100 Percent Languages Limited | Hoddesdon | 2013 |
| 100 PNM Ltd | Watford | 2018 |
| 100 Rockets Ltd | York | 2021 |
| 100 Solution Ltd | London | 2024 |
| 100 Squared Ltd | Richmond | 2006 |
| 100% Architecture Limited | Tonbridge | 2024 |
| 100% Bikes (Europe) Limited | Edgware | 2008 |
| 100% Cotton Limited | Bath | 2010 |
| 100% Design Limited | Loughton | 2002 |
| 100% Effective Limited | Shipley | 2002 |
| 100% Financial Limited | | 2000 |
| 100% Open Limited | London | 2009 |
| 100% Recovered Ltd | Worcester | 2013 |
| 1000 Feet Limited | Sevenoaks | 2022 |
| 1000 Limited | Bedford | 2010 |
| 1000 Months Limited | Wantage | 2019 |
| 1000 Trade Studios Ltd | Birmingham | 2025 |
| 1000 Variables Limited | Bexhill-On-Sea | 2022 |
| 1000HEADS Limited | London | 2010 |
| 1000WORDS Limited | Porthmadog | 2025 |
| 1001 Foundation Limited | London | 2018 |
| 1001 Winds Limited | London | 2007 |