| Arrow Psychiatry Limited | Croydon | 2024 |
| Arrow Support Limited | Wokingham | 2008 |
| Arrowood Limited | Coventry | 2018 |
| Arrowsmith Care Homes Limited | Preston | 2016 |
| Arrowsmith Care Ltd | Chigwell | 2019 |
| Arrowsmith Medical Limited | Leeds | 2025 |
| Arrowsmith Medical Services Ltd | Chatteris | 2018 |
| Arrowsmith Rest Homes Limited | Preston | 2004 |
| ARROYO1071 Limited | West Drayton | 2024 |
| Arrun Ramabhadra Ltd | Reading | 2019 |
| ARS Care Ltd | Uxbridge | 2025 |
| ARS Dent Services Limited | Preston | 2025 |
| ARS Heartscan Services Limited | Scunthorpe | 2023 |
| ARS Medica Ltd | Gloucester | 2020 |
| Arsal Corporation Ltd | Liverpool | 2013 |
| Arsala Ltd | Harrow | 2012 |
| Arsalanz Ltd | Colchester | 2025 |
| Arsan Medical Ltd | Sevenoaks | 2018 |
| Arscott Care Hub Limited | Barnstaple | 2019 |
| Arsema Limited | Birmingham | 2014 |
| Arsenal Medical Ltd | Brentwood | 2019 |
| Arseniou Neurophysiology Ltd | Edgware | 2023 |
| Arsf Limited | Lincoln | 2013 |
| Arsh Derma Ltd | Sutton Coldfield | 2025 |
| Arsh Healthcare Limited | Romford | 2015 |
| Arshad 41 Ltd | Blackburn | 2021 |
| Arshad Health and Wellbeing Ltd | Rochdale | 2017 |
| Arshad Health Ltd | Wolverhampton | 2014 |
| Arshad Healthcare Ltd | Blackburn | 2024 |
| Arshad Khan Ltd | Birmingham | 2009 |
| Arshad N Family Medical Limited | London | 2024 |
| Arshad Rafiq Longridge Limited | Manchester | 2019 |
| Arshadmir Limited | Wirral | 2022 |
| Arshami Ltd | Hook | 2026 |
| Arsheeyan Ltd | Nottingham | 2021 |
| Arsher Ltd | Wednesbury | 2023 |
| Arshi's Aesthetics Limited | Hertford | 2026 |
| Arshia and Daughters Limited | Stoke-On-Trent | 2023 |
| Arshia Kunal Ltd | Leicester | 2022 |
| Arshid Medical Limited | Liverpool | 2023 |
| Arslan & Aljoudeh Limited | Sheffield | 2014 |
| Arslan Massage & Therapy Ltd | Bolton | 2021 |
| Arsr Medical Limited | Birmingham | 2017 |
| Art & Spancho Ltd | London | 2015 |
| Art & Wellbeing Studio Ltd | Birmingham | 2025 |
| Art & Wellness Ltd | Birmingham | 2026 |
| Art (Assisted Reproductive Technology) Warwickshire Ltd. | London | 2010 |
| Art 2 Art Therapy Ltd | Dartford | 2021 |
| Art Avens Care Limited | Chesterfield | 2019 |
| Art Beyond Belief Limited | Windsor | 2008 |
| Art Body Mind Limited | Aberystwyth | 2022 |
| Art Boss Ltd | Wembley | 2022 |
| Art Box Therapy Ltd | London | 2021 |
| Art Camp UK Ltd | Boston | 2019 |
| Art Craft & Laughter CIC | Plymouth | 2020 |
| Art Dental Studio Limited | Sheffield | 2013 |
| Art for Hearts Sake CIC | Doncaster | 2024 |
| Art for MED C.I.C. | Gravesend | 2025 |
| Art Foundation Ltd | London | 2024 |
| Art Heals on Wheels Ltd | Inverness | 2025 |
| Art in Hospital | Glasgow | 2007 |
| Art in Smile Ltd | London | 2015 |
| Art India Initiative for Girls | London | 2014 |
| Art Medical Services Ltd | Liverpool | 2026 |
| Art of Acupuncture Ltd. | Ayr | 2008 |
| Art of Care Ltd | Liverpool | 2014 |
| Art of Chiropractic Limited | Droitwich | 2017 |
| Art of Dental Care Limited | Chester | 2023 |
| Art of Living Foundation (UK) | Cheadle | 2009 |
| Art of Meditation Foundation Ltd | Falmouth | 2013 |
| Art of Play CIC | Hartlepool | 2024 |
| Art of Thought Psychological Practice Ltd | Surrey | 2020 |
| Art Orthodontics London Ltd | London | 2017 |
| Art Psychotherapy Intervention and Cultivation Ltd | Winchester | 2026 |
| Art Research Creativity & Health | Woking | 1992 |
| Art Science Magic Limited | Chorley | 2020 |
| Art Shape Limited | Brockworth | 1992 |
| Art Studio Therapy Ltd | London | 2024 |
| Art Tech Dental Ceramics Ltd | Fordingbridge | 2018 |
| Art Therapy Co-Operative Ltd | London | 2023 |
| Art Therapy Collaborative CIC | Malvern | 2022 |
| Art Therapy London Academic CIC | Kington | 2024 |
| Art Therapy North East CIC | Cleveland | 2020 |
| Art Therapy Temple Ltd | London | 2025 |
| Art With Smiles CIC | Altrincham | 2022 |
| Art Workers Guild Trustees,Limited | London | 1913 |
| Art Works South Yorkshire Ltd | Rotherham | 2019 |
| Art, Mind & Soul C.I.C. | Worthing | 2025 |
| Art- BEA Limited | Abingdon | 2020 |
| Arta GAP Limited | Dorchester | 2016 |
| Artazak Ltd | Peterborough | 2024 |
| Artdent CDS Limited | Salford | 2016 |
| Artdent Ltd | Harrow | 2020 |
| Artegis Ltd | Ashtead | 2017 |
| Artemide Ltd | Tunbridge Wells | 2019 |
| Artemis Aesthetic Limited | Otley | 2011 |
| Artemis Aesthetic Medical Ltd | Otley | 2016 |
| Artemis Birth Attendant Academy Ltd | Walsall | 2022 |
| Artemis Breast Ltd | Chorley | 2025 |
| Artemis Care Limited | Lincoln | 2017 |