| A-A Contract Ltd. | Stanford-Le-Hope | 2015 |
| A-Best Support Ltd | Stockport | 2025 |
| A-Camps Ltd | Brighouse | 2018 |
| A-Class Salon Limited | London | 2019 |
| A-Coheir Limited | Manchester | 2022 |
| A-Cute Medical Event Services Limited | Southampton | 2013 |
| A-E Medicine Ltd | Radlett | 2021 |
| A-Fix Orthopaedics Limited | London | 2005 |
| A-Game Consultancy Ltd | Newark | 2020 |
| A-Jazaj Ltd | Radlett | 2016 |
| A-Kass Ventures and Services Ltd | Gillingham | 2023 |
| A-Kind Limited | Watford | 2015 |
| A-Kus RMN Limited | Milton Keynes | 2020 |
| A-Line Dental Services Limited | Sunderland | 2006 |
| A-List Beauty Aesthetics Ltd | Bruton | 2025 |
| A-Mat Healthcare Limited | Birmingham | 2016 |
| A-One Care Limited | Kirkcaldy | 2026 |
| A-One Medic Ltd | Keighley | 2012 |
| A-R Health Limited | Leicester | 2018 |
| A-Run Ophtalmology Limited | Manchester | 2025 |
| A-Spirit Ltd | Birmingham | 2022 |
| A-Star Kids Ltd | Oldham | 2021 |
| A-Star Wellness Ltd | Winchmore Hill | 2019 |
| A-Touch Professional CIC | Erith | 2024 |
| A-Training CW Limited | Grantham | 2019 |
| A-Triangle Care Ltd | Thornton Cleveleys | 2019 |
| A-True Care Ltd | Northampton | 2025 |
| A-W Assessors Limited | Hull | 2025 |
| A-Z Anaesthesiacare Ltd | London | 2013 |
| A-Z Dental Holdings Limited | Manchester | 1983 |
| A-Z Diagnostics Ltd | Cardiff | 2023 |
| A-Z Healthcare Services Ltd | Worthing | 2021 |
| A-Z of Emotional Health Ltd | Bradford-On-Avon | 2014 |
| A-Z Orthodontics Limited | London | 2016 |
| A-Z Solutions Private Limited | Sittingbourne | 2022 |
| A-Z Visions Limited | Rochdale | 2019 |
| A-Z Wellness Ltd | Blackburn | 2022 |
| A-Z-Care Ltd | Bournemouth | 2019 |
| A. a. Ibrahim Ltd | Tottenham | 2015 |
| A. a. Medical Locum Ltd | Leicester | 2023 |
| A. Alvarez Catering Ltd | Chertsey | 2018 |
| A. Aschaber Ltd | Glasgow | 2024 |
| A. C. Michaels Limited | Nottingham | 2019 |
| A. Canavan Limited | Eastbourne | 2021 |
| A. Charles Thomas (Care) Limited | Co Durham | 1987 |
| A. Christou Limited | Brighton | 2022 |
| A. E. Mantell Psychiatry Limited | Sherborne | 2026 |
| A. Fletcher Limited | Lancs | 2002 |
| A. Forster Limited | Wilmslow | 2018 |
| A. G. H. Optics Ltd | London | 2025 |
| A. G. Sloan Ltd | Preston | 2010 |
| A. G. Smiles Ltd | Hastings | 2018 |
| A. Gaitonde Limited | Cardiff | 2007 |
| A. Glory Ltd | Huntingdon | 2018 |
| A. H. Hygienist Services Limited | Buntingford | 2014 |
| A. H. J. David Limited | Ramsey | 2009 |
| A. I Anaesthetic Ltd | Ascot | 2022 |
| A. I. Educational & Child Psychology Service Ltd | Northwich | 2019 |
| A. Idowu Psychology Ltd | Longfield | 2021 |
| A. J. B. Denture Services Ltd | Watford | 2005 |
| A. J. Gilbert (Chemist) Limited | South Croydon | 1998 |
| A. J. Tilbury Ltd | Loughborough | 2026 |
| A. J. W. King Ltd | Preston | 2003 |
| A. Jeng Contracts Ltd | Nuneaton | 2018 |
| A. Kapila Limited | Stourbridge | 2011 |
| A. Key Osteopathy Ltd | London | 2021 |
| A. L. Casey Limited | Co Fermanagh | 1968 |
| A. Lastauskas Limited | Stevenage | 2013 |
| A. Maxwell Limited | Hertfordshire | 2006 |
| A. Mohammed Medical Limited | Huddersfield | 2007 |
| A. Myin Ltd | Manchester | 2002 |
| A. Nasir Medical Limited | Manchester | 2023 |
| A. O'Malley Orthodontics Limited | Ormskirk | 2022 |
| A. O. OWA & Associates Limited | Woodford Green | 2026 |
| A. P. Dent (Spalding) Ltd | Spalding | 2014 |
| A. P. Doctors Limited | Brough | 2013 |
| A. Panarese Consultants Limited | Wimborne | 2011 |
| A. Porter Care Services Ltd | London | 2016 |
| A. Rather Associates Healthcare Ltd | Ruislip | 2016 |
| A. S. S. and Family Medical Services Limited | Harlow, Essex, | 2023 |
| A. S. Sidhu Ltd | Glenrothes | 2019 |
| A. Sadikot Ltd | Birmingham | 2015 |
| A. Saeed Dent Services Ltd | Corby | 2015 |
| A. Skarpa Limited | Rickmansworth | 2026 |
| A. Smith ANP Limited | Rotherham | 2025 |
| A. Subramanian Ltd | Halifax | 2015 |
| A. Welcome House Limited | Surrey | 1991 |
| A. Z. Technical Limited | Peterborough | 1999 |
| A.A Care Ltd | Bradford | 2021 |
| A.A Partnership in Care Ltd | London | 2013 |
| A.A Sports Therapy Ltd | Twickenham | 2025 |
| A.A. Aesthetics Ltd | Sheffield | 2015 |
| A.A. Care Services Ltd | Cardiff | 2019 |
| A.A. Podiatry Limited | Glasgow | 2003 |
| A.A. Smile Designers Ltd | Rochdale | 2023 |
| A.A.A.D Healthcare Limited | Tilbury | 2017 |
| A.A.Crawford Limited | Fordingbridge | 2024 |
| A.A.I.A.A. Immersive Consultancy CIC | South Croydon | 2023 |
| A.A.M.N Company Limited | Welling | 2024 |
| A.A.R Pharma Ltd | Birmingham | 2019 |