| ALL WE Care Ltd | Loughton | 2022 |
| ALL WE DO IS Care Ltd | Ashford | 2026 |
| ALL Weather Healthcare Ltd | Stoke-On-Trent | 2020 |
| ALL Well and Good Ltd | Chester | 2024 |
| ALL Wellness Ltd | Liverpool | 2020 |
| ALL Wild Ways Limited | Loughton | 2025 |
| ALL Your Solutions Limited | Chertsey | 2010 |
| All-About O.T. Ltd | Rotherham | 2012 |
| All-Ears.Info Ltd | Ipswich | 2024 |
| All-Pro Sports & Wellbeing Limited | Castleford | 2023 |
| ALL2HEALTHCARE Ltd | Ipswich | 2019 |
| ALL41CARE Ltd | Stoke-On-Trent | 2024 |
| ALL4CHILDREN Ltd | Wolverhampton | 2024 |
| ALL4KARE Limited | Tadcaster | 2025 |
| ALL4KIDZ CIC | London | 2024 |
| ALL4ONE Care Services Limited | Ingatestone | 2021 |
| ALL4ONE Care Services Nightingale House Limited | Southend-On-Sea | 2024 |
| ALL4ONE London Limited | Edgware | 2020 |
| ALL4ONESERVICES Ltd | Croydon | 2022 |
| ALL4U Fostering Ltd | Sevenoaks | 2016 |
| Alla Moda Midlands Limited | Ripley | 2013 |
| Alladent Services Limited | Aberdeen | 2008 |
| Allafia Care Solutions Ltd | London | 2025 |
| Allag Care Limited | Leicester | 2014 |
| Allah Nawaz 14 Associates Limited | Sale | 2025 |
| Allahu Akbar Limited | Chatham | 2013 |
| Allai Limited | Birmingham | 2012 |
| Allambie Enterprises Limited | Ruislip | 2001 |
| Allan Counselling and Consulting Ltd | Sutton | 2025 |
| Allan Healthcare Services Limited | Leicester | 2013 |
| Allan Kent Limited | Wymondham | 2022 |
| Allan Training and Consulting Ltd | London | 2026 |
| Allan Wood Limited | Oldham | 2025 |
| Allan,Howdle Medical Ltd | Newport | 2019 |
| Allana Charity Ltd | London | 2007 |
| Allana Optical Ltd | Leicester | 2026 |
| Allandale Care Group Limited | Heswall | 1967 |
| Allander Homecare Ltd | Prestwick | 2009 |
| Allander Psychiatry Limited | Lanark | 2010 |
| Allanwater Chiropractic Clinic Limited | Stirling | 2004 |
| Allard Care Ltd | Chesterfield | 2015 |
| Allaura Stroud Ltd | Bolton | 2022 |
| Allbeing Ltd | Cheltenham | 2022 |
| Allbest Solutions Limited | Woking | 2018 |
| Allbets Caredoc Limited | Woodford Green | 2021 |
| Allbetter Care and Housing CIC | London | 2025 |
| Allbetter Care Limited | London | 2018 |
| Allbody Health Ltd | London | 2025 |
| Allbrite Healthcare Ltd | Stockton-On-Tees | 2016 |
| Allcare Agency Limited | Hornchurch | 2002 |
| Allcare Community Care Services Trafford Limited | Wirral | 2014 |
| Allcare Community Support Limited | Norwich | 2013 |
| Allcare Connect Ltd | London | 2025 |
| Allcare Nurses Agency Limited | Blackburn | 2002 |
| Allcare Nursing Agency Ltd | Conwy | 2005 |
| Allcare Providers Scot Ltd | Dunfermline | 2021 |
| Allcare Services and Training Ltd | Bromyard | 2008 |
| Allcare Shropshire Limited | Shrewsbury | 2003 |
| ALLCARE365 Ltd | Paisley | 2023 |
| Allcares Supported Living Ltd | Northwich | 2025 |
| Allcontrast Limited | Brierley Hill | 1998 |
| Allday Health Ltd | Horsham | 2024 |
| Allday Healthcare Ltd | Redhill | 2024 |
| Alldee Ltd | London | 2025 |
| Allegory Clinic Ltd | Twickenham | 2026 |
| Allegra Care (Holdings) Limited | Godalming | 2018 |
| Allegra Care Somerset Limited | Godalming | 2019 |
| Allegra Care South Limited | Godalming | 2019 |
| Allegra Dental Ltd | Cardiff | 2014 |
| Allegra Fairmile Grange Limited | Godalming | 2024 |
| Allegra Health Care Ltd | Chertsey | 2025 |
| Allegra Health Limited | Bury St. Edmunds | 2017 |
| Allegra Services Limited | Godalming | 2018 |
| Allegro Optical (Marsden) Ltd | Holmfirth | 2021 |
| Allegro's Homes and Hospice Ltd | Basingstoke | 2022 |
| Alleluia Ministries UK Ltd | Enfield | 2021 |
| Alleluia Nneka Enterprises Ltd | London | 2015 |
| Allemansrätt Ltd | Bude | 2025 |
| Allen and James Limited | Coventry | 2014 |
| Allen Associates Psychiatric and Psychological Expert Witness Services Limited | Bexhill On Sea | 2020 |
| Allen Care Ltd | Isleworth | 2015 |
| Allen Carr's Easyway (US) Ltd. | London | 2013 |
| Allen Chipunza Limited | Rotherham | 2014 |
| Allen Healthcare Ltd | London | 2018 |
| Allen Healthcare Services Ltd | Leeds | 2018 |
| Allen House Dental Crewe Ltd | Crewe | 2025 |
| Allen House Dental Ipswich Ltd | Ipswich | 2026 |
| Allen Medical Limited | Ipswich | 2016 |
| Allen Medicare Limited | Norwich | 2017 |
| Allen Psychology Limited | Wirral | 2021 |
| Allenanastasia Limited | Redhill | 2023 |
| Allenbrook Care Limited. | Poole | 2004 |
| Allenbrook Home (Halesowen) Ltd. | Halesowen | 2018 |
| Allenby Douglas Limited | Oswestry | 2000 |
| Allendale Care Limited | Newcastle Under Lyme | 2013 |
| Allendale Rest Home Ltd | Manchester | 2001 |
| Allergia Ltd | Elland | 2022 |
| Allergology and GP Clinic DR Tomasz Grzelewski Limited | Cardiff | 2023 |
| Allergosphere Ltd | Eltham | 2025 |
| Allerguard Ltd | London | 2025 |