| AGE UK North Yorkshire & Darlington | Darlington | 2009 |
| AGE UK North Yorkshire Coast & Moors | Scarborough | 2011 |
| AGE UK Northamptonshire | Northampton | 1996 |
| AGE UK Northamptonshire Trust Corporation Limited | Northampton | 2023 |
| AGE UK Northumberland | Ashington | 1998 |
| AGE UK Norwich (Services) Limited | Norwich | 2000 |
| AGE UK Norwich Limited | Norwich | 2002 |
| AGE UK Notts MEN in Sheds CIC | Nottingham | 2018 |
| AGE UK Reading Trading Limited | London | 2016 |
| AGE UK Redbridge, Barking and Havering Ltd | Ilford | 2001 |
| AGE UK Richmond Services Limited | Hampton | 2013 |
| AGE UK Richmond Upon Thames | Hampton | 2000 |
| AGE UK Rotherham Limited | Rotherham | 1985 |
| AGE UK Sevenoaks Tonbridge & District | Tonbridge | 2001 |
| AGE UK Sheffield | Sheffield | 2004 |
| AGE UK Somerset | Taunton | 1992 |
| AGE UK South Cumbria Ltd | Kendal | 2011 |
| AGE UK Stafford & District | Stafford | 1997 |
| AGE UK Stockport | Stockport | 2010 |
| AGE UK Stockport Trading Limited | Stockport | 1994 |
| AGE UK Sunderland | Sunderland | 2001 |
| AGE UK Surrey | Godalming | 1993 |
| AGE UK Sutton | Sutton | 2001 |
| AGE UK Tameside | Ashton-Under-Lyne | 2011 |
| AGE UK Teesside Limited | Middlesbrough | 1987 |
| AGE UK Thanet Limited | Margate | 2013 |
| AGE UK Torbay | Paignton | 2000 |
| AGE UK Tunbridge Wells | Tunbridge Wells | 2012 |
| AGE UK Wakefield District | West Yorkshire | 2002 |
| AGE UK Wakefield District Enterprises Limited | Castleford | 2013 |
| AGE UK Waltham Forest | Chingford | 1989 |
| AGE UK West Sussex, Brighton and Hove | Brighton | 2001 |
| AGE UK Westminster | London | 1993 |
| AGE UK Wigan Borough Enterprises Limited | Wigan | 1997 |
| AGE UK Wiltshire | Devizes | 1987 |
| AGE UK Wiltshire Trading Limited | Devizes | 2011 |
| AGE UK Worcester, Malvern Hills & Hereford Localities | Worcester | 2006 |
| AGE Well East Ltd | Clacton-On-Sea | 2011 |
| AGE Well Physiotherapy Limited | Glasgow | 2026 |
| AGE Wessex | Devizes | 2007 |
| AGE With Elegance Medical Aesthetics & Skin Clinic Ltd | Bolton | 2025 |
| Age-On C.I.C. | Omagh | 2015 |
| Agecare Support Limited | Hitchin | 2021 |
| Aged Blind and Disabled Centre (Bacup) Charitable Trust | Bacup | 2003 |
| Agee Care Limited | Stoke-On-Trent | 2015 |
| Ageing and Disability Care Services UK Limited | London | 2026 |
| Ageing Brain Care Ltd | Chelford | 2022 |
| Ageingwell UK Limited | Glasgow | 2018 |
| Ageless Aesthetics Bham Ltd | Sutton Coldfield | 2023 |
| Ageless Angels Limited | London | 2010 |
| Ageless by Design Limited | Belper | 2026 |
| Ageless Companions Limited | Kirkcaldy | 2019 |
| Ageless Cosmetics (Norfolk) Limited | Plymouth | 2016 |
| Ageless Ltd | Northampton | 2026 |
| Ageless Medical Clinic Ltd | Seaford | 2018 |
| Ageless Perfection Limited | Weston-Super-Mare | 2017 |
| Ageless Teenagers CIC | Romford | 2025 |
| Ageless Therapy & Homecare Services Ltd | Harlow | 2025 |
| Agelink Care Ltd | London | 2024 |
| Agem 18 Ltd | Bolton | 2022 |
| Agency Assistance Limited | Exmouth | 2021 |
| Agency Endoscopy Limited | Doncaster | 2020 |
| Agenda E3 Limited | Richmond | 2013 |
| Agendum (UK) Ltd | Macclesfield | 2005 |
| Ageno Lubanga Kene Ltd | London | 2017 |
| Agent Golightly Ltd | London | 2022 |
| Agenta Compliance Ltd | Twickenham | 2026 |
| Agentic Health Ltd | London | 2026 |
| Agentic Wellness Ltd | Manchester | 2024 |
| Agentis Diagnostics Ltd | Hove | 2025 |
| Agentis Health Ltd | Hove | 2025 |
| Agents for the Homeless Ltd | London | 2024 |
| Agents Giving | Eastleigh | 2008 |
| Agev Care Limited | Glasgow | 2025 |
| Agewell Community Interest Company | Oldbury | 2013 |
| Agewise Medicolegal Experts Ltd | Cardiff | 2025 |
| Agewise Physio Ltd | Bristol | 2025 |
| Agex Ltd | Manchester | 2024 |
| AGF Medical Ltd | London | 2023 |
| AGG Manual Therapy Ltd | Wallington | 2020 |
| Aggarwal Advisory Services Limited | Sheffield | 2018 |
| Aggarwal Commercial Enterprises (Ace) Limited | Stevenage | 2016 |
| Aggarwal Services Limited | Sheffield | 2008 |
| Aggie and Sons Company Limited | Brentwood | 2012 |
| AGGIE4REAL Ltd | Caterham | 2012 |
| Aggregate Holdings Limited | Liverpool | 2019 |
| AGH Diagnostics Limited | Newcastle Upon Tyne | 2011 |
| AGH Healthcare Ltd | London | 2023 |
| AGH Infection Control Services Limited | Sheffield | 2015 |
| AGH Medical Limited | London | 2015 |
| AGH Medical Services Ltd. | Alexandria | 2015 |
| Aghyaran Development Association CIC | Castlederg | 2011 |
| AGI Gigi Limited | Oldham | 2017 |
| Agies Childrens Services Limited | Cannock | 2025 |
| Agile Care and Support Limited | London | 2026 |
| Agile Care Solutions Ltd | Milton Keynes | 2022 |
| Agile Corporation Ltd | Margate | 2020 |
| Agile Healthcare Services Ltd | Bolton | 2022 |
| Agile Home Care Services Ltd | Peterborough | 2014 |
| Agile in Work Ltd | Cardiff | 2020 |