| 31 Edin Ltd. | Edinburgh | 2006 |
| 31 ELM Grove Management Limited | London | 2002 |
| 31 Explore Ltd | London | 2023 |
| 31 FOX Road Management Limited | Nottingham | 1990 |
| 31 Munster RD Limited | London | 2000 |
| 31 Percent Wool Ltd | South Croydon | 2017 |
| 31 Plymouth Road (Penarth) Management Company Limited | South Glamorgan | 2000 |
| 31 Queens Road (Flat Management Company) Limited | London | 2000 |
| 31 ST Lukes Avenue Limited | Nuneaton | 1996 |
| 31 Windermere Ltd | Cambridge | 2021 |
| 31 Woodbridge Road Management Company Limited | East Grinstead | 2000 |
| 31-35B New Road Management Company Limited | Amersham | 2007 |
| 31/44 Limited | London | 2016 |
| 31020 Ltd | Liverpool | 2019 |
| 3109 Consulting Ltd | Bishop'S Stortford | 2022 |
| 3118 Creative Ltd | Thetford | 2026 |
| 312 Accountancy Ltd | Edinburgh | 2020 |
| 312 Consulting Limited | Birmingham | 2016 |
| 313 Engineering Services Limited | Northwood | 2025 |
| 313 Financial Ltd | Durham | 2016 |
| 313 Media Ltd | Birmingham | 2009 |
| 313 Media Services Limited | Bedford | 2019 |
| 313 Wealth Management Limited | Cardiff | 2019 |
| 313M Technology Limited | Huddersfield | 2014 |
| 313Y Limited | Richmond | 1999 |
| 314 Advisory Ltd | Marlow | 2024 |
| 314 Intl Ltd | London | 2023 |
| 314 Solutions Ltd | Fareham | 2019 |
| 315856 Limited | Preston | 1936 |
| 316 Capital Limited | London | 2025 |
| 317 Creatives Ltd | London | 2023 |
| 3173 Bidco Limited | London | 2022 |
| 3173 Limited | Belfast | 2005 |
| 3173 Midco Limited | London | 2022 |
| 3173 Topco Limited | London | 2022 |
| 3175 Studios Ltd | Horsham | 2019 |
| 31C Consulting Limited | Bewdley | 2011 |
| 31E Limited | London | 2000 |
| 31LDN Ltd | London | 2017 |
| 31TEN Consulting Limited | London | 2015 |
| 31TEN Investments Limited | London | 2023 |
| 32 Alfred Place Management Company Limited | Shepton Mallet | 1994 |
| 32 ASH Grove Ltd | Oxford | 2007 |
| 32 Bramfield Road Limited | London | 2013 |
| 32 Creative Limited | Hertfordshire | 2002 |
| 32 Digital Ltd | Bury St. Edmunds | 2019 |
| 32 GCM Limited | London | 2006 |
| 32 Hampton Park (Management Company) Limited | Bristol | 1982 |
| 32 Hill Avenue Bedminster Management Company Limited | Keynsham | 1994 |
| 32 Ltd | Glasgow | 2025 |
| 32 Portland Rise Ltd | | 2002 |
| 32 Prospect Road Property Limited | Tunbridge Wells | 1993 |
| 32 Recruitment Ltd | Ipswich | 2020 |
| 32 Royal York Crescent (Management) Limited | Bristol | 2001 |
| 32 Talbot Road Management Limited | London | 1997 |
| 32 Veronica Road Management Limited | London | 1995 |
| 32 Wellsway (Management) Bath Limited | Bath | 2003 |
| 32-42 BPR Limited | London | 2016 |
| 321 Move Limited | Leeds | 2019 |
| 321 Resources Ltd | Shortstown | 2019 |
| 321 Taxis Ltd | Glasgow | 2018 |
| 321ACCOUNTING Ltd | Edgware | 2025 |
| 321ACCOUNTS Ltd | London | 2014 |
| 321AI Ltd | Chester Le Street | 2023 |
| 322 Risk Ltd | London | 2026 |
| 323 Digital Media Ltd | London | 2026 |
| 323 Fore Street Ltd | London | 2024 |
| 329 Landscaping Ltd | Maidenhead | 2016 |
| 32B Ltd | Melksham | 2020 |
| 32CREATE Ltd | Salford | 2026 |
| 32FIVE Management Ltd | London | 2025 |
| 32ND Ltd | Inverurie | 2015 |
| 32ONGO Limited | Durham | 2025 |
| 32STRIPES Ltd | Newmarket | 2022 |
| 32WEST Ltd | Ulverston | 2018 |
| 33 Architecture Limited | Hexham | 2019 |
| 33 Ardleigh Road Limited | London | 1988 |
| 33 Argyle Road Limited | Whitstable | 2008 |
| 33 Aubert Park Management Company Limited | London | 2003 |
| 33 Auckland Road Limited | Crediton | 2001 |
| 33 Bedford ROW Escrow Limited | Holborn | 2012 |
| 33 Bedford ROW Limited | | 1992 |
| 33 CL Law Limited | London | 2008 |
| 33 Collington Avenue Limited | Bexhill-On-Sea | 2011 |
| 33 Consultancy Ltd | Oakham | 2021 |
| 33 Consulting Limited | London | 2023 |
| 33 Degrees Latitude Limited | Lewes | 2001 |
| 33 Designs Limited | Sheffield | 2025 |
| 33 Detail Limited | Hexham | 2023 |
| 33 Games Ltd | London | 2025 |
| 33 Gilbey Road Limited | Bournemouth | 2012 |
| 33 Holdings Limited | Downham Market | 2016 |
| 33 Interiors Limited | Sheffield | 2014 |
| 33 Kingsley Road Management Company Limited | Maidstone | 2006 |
| 33 Marketing Ltd | West Drayton | 2025 |
| 33 Montpelier Crescent Limited | Brighton | 2000 |
| 33 Percent Ltd | Altrincham | 2020 |
| 33 Pheasants Consulting Ltd | Rickmansworth | 2016 |
| 33 RPM Agency Ltd | London | 2022 |
| 33 Solutions Ltd | London | 2024 |