| 4N Care Ltd | Ipswich | 2019 |
| 4N6 Psychiatric Services Ltd | Brentwood | 2026 |
| 4NEWAYS Ltd | Birmingham | 2021 |
| 4P'S Generix Ltd | Luton | 2022 |
| 4PASSION Care Ltd | Oundle | 2015 |
| 4PEOPLE Care Services Ltd | Luton | 2024 |
| 4PILLARSMETHOD Ltd | Kincardine | 2026 |
| 4PNJ Limited | Shrewsbury | 2021 |
| 4PUREHEART Limited | Altrincham | 2016 |
| 4Q Healthcare Ltd | Stockton-On-Tees | 2023 |
| 4R Medical Limited | Leighton Buzzard | 2025 |
| 4R One J Limited | Kingswinford | 2021 |
| 4REAL Healthcare Ltd | Wolverhampton | 2018 |
| 4RMACY Ltd | Oldbury | 2024 |
| 4RS (UK) Limited | Rainham | 2014 |
| 4S Associates Ltd | Leicester | 2014 |
| 4S Medical Services Limited | Truro | 2016 |
| 4SAN Limited | Kettering | 2026 |
| 4SD Limited | Northwood | 2025 |
| 4SMILES Ltd | London | 2023 |
| 4STEPS4YOU Ltd | Preston | 2017 |
| 4T Healthcare Services Ltd | Luton | 2020 |
| 4T Limited | Woodbridge | 2020 |
| 4T Okpara Limited | Thornton Heath | 2016 |
| 4TABS Ltd | Romford | 2022 |
| 4TH Canal Ltd | Kirk Ella | 2019 |
| 4TH Care Ltd | London | 2023 |
| 4U2EMPOWER Ltd | Christchurch | 2022 |
| 4U2SMILE Ltd | Cardiff | 2024 |
| 4UM Care Limited | Manchester | 2025 |
| 4UNDER3 Marathon MUM Ltd | London | 2025 |
| 4V'S Kent Limited | Gravesend | 2018 |
| 4WARD Social Care Services Ltd | Poole | 2023 |
| 4WINGS Northwest CIC | Liverpool | 2013 |
| 4YEYES Limited | London | 2015 |
| 4YOURCARE Ltd | Leicester | 2023 |
| 4YOUTH BE Your Change CIC | Redruth | 2025 |
| 5 Care Children Services Ltd | Walsall | 2025 |
| 5 Care Services Ltd | Walsall | 2010 |
| 5 Care Services Supported Living Ltd | Walsall | 2024 |
| 5 Core Care Ltd | West Bromwich | 2023 |
| 5 DE Parys Ltd | Edgware | 2012 |
| 5 Flavours of Health Limited | London | 2017 |
| 5 Health Solutions Ltd | Manchester | 2015 |
| 5 Inajar Limited | Gateshead | 2025 |
| 5 Nations Health Protection Ltd | Edinburgh | 2025 |
| 5 Rivers Care Ltd | Slough | 2026 |
| 5 Star Carers Limited | London | 2025 |
| 5 Star Healthcare Ltd | Leeds | 2014 |
| 5 Star Lasering Limited | Hull | 2021 |
| 5 Star Nursing Services Ltd | Cheddar | 2009 |
| 5 Star TLC Limited | Poole | 2012 |
| 5 Stars Healthcare Limited | Bedfordshire | 2022 |
| 5 T Consulting Ltd | Burgess Hill | 2011 |
| 5 Towns Veterans Support Hub CIC | Pontefract | 2019 |
| 5 Valleys Physiotherapy (Gloucester) Limited | Stonehouse | 2022 |
| 5 Valleys Physiotherapy (Stroud) Limited | Stonehouse | 2022 |
| 50 Challenges Limited | Tunbridge Wells | 2017 |
| 50 Hill Rise Ltd | Richmond | 2022 |
| 50 Minutes for YOU Ltd | Northampton | 2025 |
| 50 the Vale Clinic Ltd | London | 2014 |
| 500 Housing Ltd | Birmingham | 2025 |
| 501 International Ltd | Luton | 2024 |
| 50187 Limited | Aberdeen | 2022 |
| 51 Broadmead Avenue Ltd | Northampton | 2025 |
| 51 Harley Street Limited | London | 2021 |
| 5150CO Limited | Blackburn | 2026 |
| 51R Ltd | Northampton | 2018 |
| 5335 Ltd | London | 2026 |
| 543 Dental Centre Limited | | 2002 |
| 55 Plus Ltd | London | 2005 |
| 555 Smiles Ltd | Inverurie | 2026 |
| 55515 Ltd | West Wickham | 2025 |
| 567 Club Limited | Leeds | 2015 |
| 57 FG Limited | York | 2006 |
| 57 Practice Limited | Cleckheaton | 2026 |
| 57LESCARE Ltd | Aberdeen | 2026 |
| 58 Queen Square Limited | Bristol | 2006 |
| 58 Wellbeing London Limited | London | 2023 |
| 5A Medics Ltd | Birmingham | 2022 |
| 5AB Care Ltd | Letchworth Garden City | 2018 |
| 5B3A Limited | Aylesbury | 2021 |
| 5C'S Professionals Agency Ltd | Dartford | 2020 |
| 5DA Perfection Services Limited | London | 2025 |
| 5DYKS Company Limited | Rainham | 2020 |
| 5ECARDIO Ltd. | London | 2022 |
| 5GEEZ Limited | Coventry | 2022 |
| 5GSTAR Limited | Oxford | 2020 |
| 5I Medical Limited | Winchester | 2021 |
| 5INQ Limited | Harrow | 2024 |
| 5MILES Childcare Ltd | Smethwick | 2022 |
| 5P Healing Group Limited | London | 2017 |
| 5Q Medics Limited | Reigate | 2019 |
| 5RIVERS Holdings Limited | London | 2025 |
| 5SP Medical Ltd | Manchester | 2021 |
| 5TH Avenue Medical Services Ltd | London | 2023 |
| 5TH Dimension Coaching Ltd | London | 2022 |
| 5Y Solutions Ltd | Watford | 2021 |
| 6 C'S Approach Ltd | Haywards Heath | 2023 |
| 6 C'S Health Ltd. | Bexleyheath | 2015 |