| Acacia Healthcare Services Ltd | Coventry | 2024 |
| Acacia Homecare Franchise Limited | Wraysbury | 2015 |
| Acacia Homecare Limited | Wraysbury | 2012 |
| Acacia Lodge Care Home Limited | Billericay | 2021 |
| Acacia Lodge Limited | Billericay | 2021 |
| Acacia Medical Ltd | Weldon Corby | 2023 |
| Acacia Number 1 Limited | Dover | 2007 |
| Acacia Premium Healthcare Ltd | Poole | 2024 |
| Acacia Psychological & Wellness Service Limited | London | 2022 |
| Acacia Psychology Ltd | Chesterfield | 2025 |
| Acacia Therapy Homes Ltd | London | 2024 |
| Acacia Tree Consultancy Limited | Harrow | 2022 |
| Acadability Limited | Glasgow | 2017 |
| Acadan Ltd | Newry | 2025 |
| Academia Care Consulting Limited | Bolton | 2016 |
| Academic Adventures Limited | Shipley | 2025 |
| Academic Day Nursery Ltd | Stoke Newington | 2019 |
| Academify Limited | Feltham | 2024 |
| Academy 4 Wellbeing Limited | Stoke-On-Trent | 2010 |
| Academy Care Ltd | Northampton | 2018 |
| Academy Dental Care Limited | Aberdeen | 2008 |
| Academy for Aaron Mattes Therapies Limited | Aberdeen | 2014 |
| Academy for Aesthetic Anatomy Limited | London | 2022 |
| Academy for Dentists Limited | Wilmslow | 2025 |
| Academy Homecare Services Limited | Kingswinford | 2007 |
| Academy Homes Limited | Leicester | 2024 |
| Academy House (Govan) Limited | Glasgow | 2022 |
| Academy House Limited | Glasgow | 2013 |
| Academy of Aesthetic Medicine Limited | Basingstoke | 2018 |
| Academy of Blood Chemistry Ltd | London | 2025 |
| Academy of Clinical Excellence Limited | Hebden Bridge | 2007 |
| Academy of Confidence Ltd | Loanhead | 2025 |
| Academy of Digital Dentistry Limited | Ely | 2014 |
| Academy of Fabulous Stuff Community Interest Company | Leeds | 2016 |
| Academy of Natural Medicine Ltd | Hove | 2018 |
| Academy of Play and Child Psychotherapy Limited | Uckfield | 1998 |
| Academy of Soft & Hard Tissue Augmentation Ltd | Wembley | 2021 |
| Academy of South Indian Music (London) Ltd | Hornchurch | 2013 |
| Academy of Systematic Kinesiology Limited(The) | Epsom | 1987 |
| Academy Practice Limited | Coatbridge | 2010 |
| Acadia Pharma Limited | Altrincham | 2015 |
| Acah Limited | Corby | 2016 |
| Acajou Services Ltd | Coventry | 2018 |
| Acakhtar Limited | Newcastle Upon Tyne | 2019 |
| Acala Healing Ltd | Worcester Park | 2022 |
| Acanthus Care Group Limited | Peterborough | 2026 |
| Acanthus Health Care Limited | Lowestoft | 2011 |
| Acare Home Care Ltd | Gosport | 2026 |
| Acare Kent Ltd | Ashford | 2023 |
| Acare Solutions Limited | Littlehampton | 2018 |
| ACARE4U Limited | Gloucester | 2023 |
| Acarinda Care Limited | London | 2025 |
| Acarres Ltd | Dunstable | 2023 |
| Acasa Care Limited | Prestwick | 2010 |
| Acasa Healthcare Services Ltd | Glasgow City Centre | 2023 |
| Acasa Ltd | High Wycombe | 2018 |
| ACB Dental Limited | Eastbourne | 2023 |
| ACB Orthopaedics Limited | Wilmslow | 2023 |
| ACB Psychology Limited | Seaton | 2018 |
| Acbc Cardiology Tees Limited | Gateshead | 2025 |
| Acbiggs Ltd | Tunbridge Wells | 2023 |
| ACC (West) 1 Limited | London | 2016 |
| ACC 1 Ltd | London | 2015 |
| ACC Healthcare Limited | Peterborough | 2024 |
| ACC Management Services Limited | London | 2016 |
| ACC Plus Healthcare Ltd | London | 2026 |
| ACC West Management Services Limited | London | 2017 |
| Acca Consultancy Private Limited | Colchester | 2014 |
| Acca Preventive Health Ltd | Coleraine | 2023 |
| Accalia Care Services Ltd | Redditch | 2013 |
| Accardi Smile Limited | London | 2010 |
| Acccm Healthcare Ltd | Northampton | 2014 |
| Accede Support Limited | Barnsley | 2022 |
| Accedo Care Ltd | London | 2013 |
| Accelerate Health CIC | London | 2011 |
| Accelerate Performance Centre Limited | Sheffield | 2013 |
| Accelerate Physiotherapy Ltd | Derby | 2016 |
| Accelerate Support and Care Ltd | Inverness | 2022 |
| Accelerate Support and Care SC Ltd | Kirkliston | 2025 |
| Accelerated (UK) Limited | Dagenham | 2013 |
| Accelerated Care UK Limited | Dagenham | 2023 |
| Accelerated Home Health Ltd | Slough | 2018 |
| Accelerated Lifestyle Ltd | Harrogate | 2015 |
| Acceleratephysiotherapyclinics Ltd | Sunderland | 2026 |
| Accelerating Clinical Trials Ltd | London | 2021 |
| Accellacare UK Limited | Reading | 2000 |
| Accenta Group Limited | Sandhurst | 2024 |
| Accenta Healthcare Limited | Sandhurst | 2011 |
| Accenta Shepperton Limited | Sandhurst | 2023 |
| Accenta Woking Limited | Sandhurst | 2012 |
| Accentra-Brownrigg Guarantee Ltd | Newcastle Upon Tyne | 2026 |
| Accentus Dental Technologies Ltd | Didcot | 2015 |
| Accept Care Ltd | Belfast | 2003 |
| Accept Leisure Ltd | Clydebank | 2021 |
| Accept Psychology Ltd | London | 2020 |
| Acceptable Collection Limited | Grimsby | 2022 |
| Acceptable Year Ltd | Stevenage | 2022 |
| Acceptus Healthcare Limited | Lowestoft | 2011 |
| Access & Align Coaching Ltd | London | 2025 |
| Access 2 Aesthetics Ltd | Mountain Ash | 2021 |