| 4 Day Week Foundation Ltd | London | 2022 |
| 4 Dewi Mind Health Matters C.I.C. | Pontypridd | 2025 |
| 4 Duckett Road (Freehold) Limited | London | 2012 |
| 4 Ever Shine Ltd | Welwyn Garden City | 2022 |
| 4 Ewelme Road RTM Company Limited | London | 2010 |
| 4 Fibre Limited | Hedge End | 2001 |
| 4 Filled Ltd | London | 2020 |
| 4 Fresh Wheels Ltd | Bedford | 2020 |
| 4 Futures Limited | London | 2009 |
| 4 Futures Phase 1 Holdings Limited | London | 2009 |
| 4 Futures Phase 1 Limited | London | 2009 |
| 4 GM Sales Limited | London | 2019 |
| 4 Green Finance Ltd | London | 2025 |
| 4 Guy's Barber's Limited | Solihull | 2024 |
| 4 Hammonds Ltd | Manchester | 2025 |
| 4 House Properties Ltd | London | 2023 |
| 4 International Ltd | Poynton | 2026 |
| 4 K Fadez Ltd | Eastbourne | 2024 |
| 4 Legs and a Tail Ltd | Retford | 2022 |
| 4 Life Photo Limited | Sandhurst | 2021 |
| 4 Lifestyle Management Ltd | Chester | 2020 |
| 4 Mental Health Ltd | Conwy | 2017 |
| 4 Middle Lane Ltd | Teddington | 2021 |
| 4 Montpellier Avenue Limited | Epsom | 2024 |
| 4 Oaks DRY Cleaning Ltd | Halesowen | 2025 |
| 4 Paws and Pals Ltd | Bracknell | 2018 |
| 4 Paws Dog Stylist Ltd | London | 2023 |
| 4 Paws Dog Walking Ltd | Evesham | 2024 |
| 4 Paws in the Park Limited | Harrow | 2025 |
| 4 Paws Pet Services Yorkshire Ltd | York | 2025 |
| 4 Points Branding Solutions Limited | Ruislip | 2018 |
| 4 Probyn Road Management Ltd | London | 2020 |
| 4 Recruitment Services Ltd | Enfield | 2007 |
| 4 Rings Exclusive Ltd | Dartford | 2025 |
| 4 Season Nails & Spa Ltd | Liverpool | 2016 |
| 4 Seasons Car Wash (NE) Limited | Preston Farm Business Park | 2019 |
| 4 Seasons Design and Build Limited | Rochdale | 2015 |
| 4 Seasons Gardens (Norden) Limited | Rochdale | 2011 |
| 4 Seasons Group Midlands Limited | Coventry | 2026 |
| 4 Seasons Marketing Ltd | London | 2025 |
| 4 Seasons Nails & Spa Ltd | Liverpool | 2023 |
| 4 Seasons Tailor Ltd | Edinburgh | 2024 |
| 4 Social Work Ltd | Ilford | 2016 |
| 4 ST. James's Square Limited | | 1971 |
| 4 Stanwick Road Flat Owners Limited | London | 2005 |
| 4 Star DRY Cleaners Ltd | Harrow | 2018 |
| 4 the Avenue Management Company Limited | Kingston Upon Thames | 1985 |
| 4 the Community CIC | Blackburn | 2013 |
| 4 the LUV of Dogs Ltd | Hamilton | 2021 |
| 4 Thebest Ltd | Barnsley | 2019 |
| 4 Upper Belgrave Road Management Company Limited | Bristol | 1986 |
| 4 UR Mind C.I.C. | Sheerness | 2026 |
| 4 VIP Detailing Ltd | Cranleigh | 2026 |
| 4 VS Valeting Centre Ltd | Rochester | 2019 |
| 4 Walls Live Limited | Frome | 2023 |
| 4 Warden Road Management Company Limited | Bristol | 2015 |
| 4 Way in Ltd | London | 2022 |
| 4 Wheel Barbers Limited | London | 2023 |
| 4 Wheel Detailing Ltd | Pontypridd | 2023 |
| 4 Wheel Wholesales Ltd | London | 2020 |
| 4 YOU Barber Shop Ltd | Birmingham | 2024 |
| 4 YOU Unisex Hair Stylist Ltd | Luton | 2019 |
| 4 Your Benefit Ltd. | Maldon | 2016 |
| 4 Youth (Clitheroe) Limited | Clitheroe | 2007 |
| 4-3-3 Ltd | Sheffield | 2007 |
| 4-KNEBWORTH Limited | Knebworth | 2008 |
| 4/7 Market Street Limited | Nottingham | 1984 |
| 40 Elsworthy Road NW3 RTM Company Ltd | London | 2017 |
| 40 Kidbrooke Park Road Management Limited | Teddington | 1993 |
| 40 LD Ltd | London | 2025 |
| 40 Management Limited | Cardiff | 2015 |
| 40 Plus Fit Ltd. | Brighton | 2017 |
| 40 Victoria Crescent Residents' Association Limited | Caterham | 1981 |
| 40-51 Boreham Holt Maintenance Limited | Edgware | 1975 |
| 40/41 Cornwall Gardens (SW7) RTM Company Limited | London | 2006 |
| 400 Leisure Limited | Holmfirth | 2011 |
| 400 Shoot Limited | Norwich | 2016 |
| 401 Capital Ltd | Blackburn | 2020 |
| 403 Southborough Lane Limited | Bromley | 2022 |
| 404 Limited | Worcester Park | 2016 |
| 404 Stress NOT Found C.I.C. | Dulverton | 2025 |
| 407 Chester Road Ltd | Birmingham | 2025 |
| 408MEDIAGROUP Limited | Sandbach | 2019 |
| 40SEVEN Limited | Burton-On-Trent | 2005 |
| 41 Melville ST Freehold Ltd | Ryde | 2025 |
| 41 Norfolk Road Ltd | Ilford | 2017 |
| 411 Ltd | Manchester | 2014 |
| 41174 Limited | Penrith | 2020 |
| 411IT Limited | Liphook | 2011 |
| 414 Barbers Ltd | Rochdale | 2023 |
| 415 Professional Aesthetics Ltd | Gateshead | 2016 |
| 417-425 Finchley Road Management Limited | London | 1992 |
| 418 Services Ltd | Norwich | 2022 |
| 418 Taxis Ltd | Livingston | 2012 |
| 419 Apparel Production Ltd | London | 2021 |
| 42 BG Limited | London | 2018 |
| 42 Devonport Road RTM Company Limited | London | 2019 |
| 42 Square (London) Limited | Hertford | 2014 |
| 42 the Marina Deal Management Limited | St. Leonards-On-Sea | 2012 |
| 42 Westbourne Gardens Residents Limited | | 1998 |