| A.Williamsproperties Ltd | Bury | 2025 |
| A1 Brooke Road Limited | London | 2018 |
| A1 Care Property Ltd | Poole | 2023 |
| A1 Property Ilford Ltd | Ilford | 2022 |
| A1 Property Management Limited | Bicester | 2002 |
| A1 Property Scotland Ltd | Glasgow | 2024 |
| A1 Real Estate Holdings Ltd | London | 2025 |
| A1 Vacant Property Management Ltd | Uxbridge | 2019 |
| A1RPS Limited | London | 2019 |
| A2DOMINION Residential Limited | London | 2004 |
| A2DOMINION Treasury Limited | London | 2008 |
| A2JOM Ltd | Chessington | 2025 |
| A2Z (South West) Ltd | Bristol | 2024 |
| A3 Forum Limited | London | 2025 |
| A30 Business Park Management Limited | St Austell | 2020 |
| A5 Investments Ltd | Croydon | 2021 |
| A52 Storage Limited | Nottingham | 2023 |
| AA Accommodations Ltd | London | 2023 |
| AA and R Ltd | Brentford | 2025 |
| AA Assets and Investments Limited | Bolton | 2021 |
| AA Homemakers Ltd | Manchester | 2024 |
| AA Housing Accomodation Ltd | Birmingham | 2023 |
| AA Ironing & Tailoring Ltd | Edinburgh | 2019 |
| AA Meadfield Ltd | Slough | 2024 |
| AA Newcastle Ltd | South Shields | 2018 |
| AA Peterborough Letting Limited | Peterborough | 2021 |
| AA Properties & Apartments Ltd | London | 2026 |
| AA Property Management Limited | London | 2003 |
| AA SET Ltd | Driffield | 2021 |
| AA South Shields Ltd | South Shields | 2018 |
| AA Sunderland Ltd | South Shields | 2018 |
| AA Surveyor Services Ltd | Solihull | 2024 |
| AA Venture Properties Ltd | Stevenage | 2023 |
| AA1 Group Ltd | London | 2015 |
| AAA Dwellings Castleford Ltd | Castleford | 2021 |
| AAA London Property Management Ltd | Leicester | 2020 |
| AAA Services and Properties Limited | Birmingham | 2020 |
| Aaak Ltd | Stanmore | 2017 |
| Aaasu Property Ltd | Broxburn | 2024 |
| Aaav Property Ltd | Milton Keynes | 2023 |
| AAB (Silverdale) Limited | Brighton | 1997 |
| AAC (Hull) Ltd | Hull | 2026 |
| AAC Ellery Property Ltd | Bristol | 2022 |
| AAC Property Holding Limited | Liverpool | 2026 |
| Aahs Properties Limited | Coventry | 2023 |
| Aaka Property Ltd | Bradford | 2025 |
| Aakhan Properties Ltd | London | 2025 |
| Aaleezay and Co Limited | London | 2025 |
| AAM Globus Ltd | Mildenhall | 2022 |
| AAN Developments Limited | Manchester | 2024 |
| Aarc Property Investment Ltd | Barnet | 2024 |
| Aarc Renovations Limited | Barnet | 2024 |
| Aardvark Residential Services Ltd | Bournemouth | 2022 |
| Aargon Enterprises Ltd | Altrincham | 2013 |
| Aark Investments Ltd | London | 2025 |
| Aarka Limited | London | 2025 |
| Aaron 1 Limited | Southport | 2018 |
| Aaron Court Management Limited | Ilfracombe | 2023 |
| Aaron House Management Company Limited | Folkestone | 2015 |
| Aarondile Limited | Brighton | 1989 |
| Aaru Group Ltd | Swansea | 2023 |
| Aarushi Ltd | Mitcham | 2025 |
| Aarvee Hasumi Properties Ltd | Wallington | 2025 |
| Aas&Sons Ltd | Rickmansworth | 2025 |
| Aasp Properties Limited | South Croydon | 2022 |
| Aaya London Limited | London | 2024 |
| AAZ Dwellings & Lettings Ltd | Ilford | 2026 |
| AAZ Property Management Ltd | Gerrards Cross | 2016 |
| AB Investment Projects Ltd | Bolton | 2021 |
| AB Property Services (Thenford Street) Limited | Wellingborough | 2010 |
| AB Property Services(North West) Ltd | Bolton | 2022 |
| AB Property Solutions (Cumbria) Ltd | Workington | 2024 |
| Ab&C Property Ltd | Bury | 2026 |
| AB4 Property Management Ltd | Reading | 2024 |
| Abacot Fields Residents Management Company Limited | Evesham | 2014 |
| Abactor Management Association Limited | Hampshire | 1963 |
| Abacus (Birmingham) Management Company Limited | Birmingham | 2005 |
| Abacus House Management (Cardiff) Ltd | Cardiff | 2018 |
| Abacus Property Management and Investments Limited | Huntingdon | 2021 |
| Abacus Property Management Thanet Limited | Swindon | 2022 |
| Abal Establishment Ltd | London | 2018 |
| Abareels Limited | Rickmansworth | 1977 |
| Abay Dynamic Property Management Ltd | Carmarthen | 2026 |
| Abazira Properties Ltd | London | 2024 |
| Abbas Property Solutions Ltd | Manchester | 2024 |
| Abbassi Property Ltd | Earlswood | 2020 |
| Abbathure Flat Management Company Limited | Hemel Hempstead | 1994 |
| Abberley Court NO.1 RTM Company Limited | Chester | 2017 |
| Abberley Court NO.2 RTM Company Limited | Chester | 2017 |
| Abberley Hall Management Company Limited | Altrincham | 2000 |
| Abberley House (Malvern) Limited | Malvern | 2005 |
| Abberley Meadows (Ombersley) Management Company Limited | Birmingham | 2025 |
| Abberley Park (Management) Co. Limited | Bromsgrove | 1990 |
| Abberton Grange Management Limited | Worcester | 2009 |
| Abbeville Management Limited | Southsea | 2020 |
| Abbeville Road Studios Limited | London | 1996 |
| Abbey & Bodiam Management Company Limited | Harrow | 2014 |
| Abbey Barn South Residents Management Limited | Eastleigh | 2019 |
| Abbey Barns Management Co. Limited | King'S Lynn | 1998 |
| Abbey Barns Thetford Management Company Limited | Thetford | 2015 |