| 3 Fella's Barbers Ltd | Woodford Green | 2021 |
| 3 Flow Drains Limited | Waltham Cross | 2017 |
| 3 Grange Gardens (Eastbourne) Limited | Eastbourne | 1993 |
| 3 Hesketh Crescent Limited | Torquay | 2022 |
| 3 Humbolt Road Limited | London | 1994 |
| 3 J'S Electrical Limited | Ilford | 2005 |
| 3 L Nails & Beauty Limited | Bushey | 2022 |
| 3 Little Beans Ltd | Cheadle | 2022 |
| 3 M & J Limited | Windsor | 2015 |
| 3 NBS Ltd | Manchester | 2024 |
| 3 Pillars Conditioning Ltd | Milton Keynes | 2019 |
| 3 Point Alliance Limited | Portsmouth | 2020 |
| 3 Rays of SON Limited | Slough | 2023 |
| 3 Reasons WHY Ltd | Ulverston | 2025 |
| 3 Sheets Limited | Kingsbridge | 2008 |
| 3 Sixty Facilities Management Ltd | Liverpool | 2018 |
| 3 T Companies Ltd | Barking | 2014 |
| 3 Tiers Barnquee Limited | Peterhead | 2022 |
| 3 Weirdos Ltd | Derby | 2025 |
| 3 Western Terrace (Property) Limited | Nottingham | 1989 |
| 3-D Matrix UK Limited | London | 2015 |
| 3-FX Inc Ltd | Birmingham | 2019 |
| 30 Degrees Cutz Ltd | Leeds | 2024 |
| 30 Sussex Place Management Limited | Bristol | 1991 |
| 30/32 Dunbar Drive Freehold Limited | Reading | 2011 |
| 300 Group Ltd | Perth | 2018 |
| 300 Recycling Ltd | London | 2025 |
| 3000RPM Fire Security Limited | Dundee | 2024 |
| 3011 Ltd | London | 2023 |
| 302 Croydon Road Limited | Wallington | 2004 |
| 303 Aesthetics Limited | Liverpool | 2026 |
| 305 Holdings Limited | Glasgow | 2026 |
| 30F Enterprises Limited | Preston | 2026 |
| 30F Limited | Preston | 2023 |
| 31 Blythe Hill Ltd | Orpington | 2007 |
| 31 Brock Street Property Management Company Limited | Bath | 2016 |
| 31 Bronsart Road London Limited | Warwick | 2015 |
| 31 Cutz Ltd | Derby | 2024 |
| 31 Elsworthy Road Limited | London | 2024 |
| 31 Hair and Beauty Limited | Bristol | 2019 |
| 31 HTB Limited | Stanmore | 2021 |
| 31 New Inn Yard Ltd | London | 2025 |
| 31 the Basement Ltd | Hoddesdon | 2019 |
| 31 York Street Twickenham Limited | New Malden | 2005 |
| 31-36 Liberty Street Freehold Limited | | 2003 |
| 31-40 Cleveland Mansions RTM Company Limited | London | 2014 |
| 31-FINSBURY Park Road Ltd | London | 2014 |
| 310 Whitehall Road Management Company Ltd | Bristol | 2017 |
| 311 Norwood Road Limited | | 2003 |
| 312 INK Ltd | Cheadle | 2019 |
| 313 Electronics Ltd | Maesteg | 2023 |
| 313 Laundrette Limited | Leicester | 2024 |
| 313 Property Management Services Ltd | London | 2026 |
| 313 Trust Corporation Ltd | Peterborough | 2019 |
| 315 Supplies Limited | High Wycombe | 2020 |
| 316 Fabrications Ltd | Carlisle | 2020 |
| 3182 Bingham Ltd | Bangor | 2021 |
| 3182 Franklin Ltd | Bangor | 2022 |
| 319 Investments Limited | Northwood Hills | 2025 |
| 32 Grosvenor Gardens Services Limited | Hoddesdon | 2018 |
| 32 Somers Road Residents Association Limited | Reigate | 1996 |
| 320 Media Services Ltd | Eastleigh | 2021 |
| 321 Consultancy Limited | Blackburn | 2016 |
| 321 Corporate Payroll Ltd | Sambourne | 2020 |
| 321-ACTION Limited | London | 2023 |
| 328 Norwich (Residents) Association Limited | Ipswich | 2002 |
| 32ANDBROS Property Limited | London | 2023 |
| 33 Electrical Ltd | Thornton Cleveleys | 2021 |
| 33 Enterprises Ltd | Northampton | 2022 |
| 33 Legal Limited | Manchester | 2017 |
| 33 Lenham Road Company Limited | Thornton Heath | 2015 |
| 33 Purley Downs Limited | London | 2015 |
| 33-BEAUTY Studio London Ltd | London | 2024 |
| 333 Management Limited | London | 2010 |
| 333ANGELUSCUSTOS Limited | Ilford | 2025 |
| 333HDVL Limited | Coventry | 2022 |
| 33DOWANHILL Ltd | Linwood | 2019 |
| 33KARMA Ltd | Bircotes, Doncaster | 2024 |
| 34 Aberdeen Road Residents Company Limited | Holt | 1992 |
| 34 Aesthetics UK Ltd | London | 2024 |
| 34 Beaufort Gardens Management Company Limited | London | 1992 |
| 34 Gloucester Walk Management Limited | | 1985 |
| 34 Milyon Ltd | London | 2025 |
| 34-46 Surman Street RTM Company Limited | Worcester | 2008 |
| 342 Enterprises Ltd | Newcastle Upon Tyne | 2019 |
| 344 Watford Tattoo Ltd | Watford | 2019 |
| 345 Queenstown Road Ltd | London | 2023 |
| 35 Beautician Ltd | Chatham | 2019 |
| 35 Stanfield Road Company Ltd | Bournemouth | 2015 |
| 35 TAN Ltd | Donaghadee | 2022 |
| 351 Fitness Limited | Lydney | 2021 |
| 351 Inc Limited | London | 2019 |
| 355 Limited | Rye | 2017 |
| 359. Exclusive Limited | Hythe | 2025 |
| 359. Sports Management Limited | Hythe | 2025 |
| 359.TENNIS Limited | Hythe | 2024 |
| 36 Aigburth Drive RTM Company Ltd | Liverpool | 2015 |
| 36 Cosmetics Limited | London | 2024 |
| 36 Graham Road (Freehold) Limited | Bournemouth | 2016 |
| 36 Member Limited | Canterbury | 2009 |