| Avonmore Court Management Limited | Carrickfergus | 2009 |
| Avonmore Gardens Residents Association Limited | London | 1988 |
| Avonmore Management Company(Eastbourne)Limited | Eastbourne | 1970 |
| Avonmore Road Management Company Limited | London | 2002 |
| Avonmouth Road Management Company Limited | Stevenage | 2005 |
| Avonside Limited | Solihull | 1980 |
| Avonside Management Company Limited | Bristol | 1994 |
| Avonview Property Management Limited | Birmingham | 2007 |
| Avonwick Green Management Limited | South Brent | 2003 |
| Avonwood Homes Ltd | West Drayton | 2022 |
| AVP Management Limited | Aylesford | 2013 |
| AVR Management Ltd | Bristol | 2012 |
| Avriel Ltd | London | 2024 |
| Avrm Management Company Limited | Colchester | 2021 |
| Avro Building Management Company Limited | Manchester | 2018 |
| Avro Court RTM Company Ltd | Chatham | 2025 |
| Avro General Limited | Coventry | 2020 |
| Avro Hollows Tenant Management Organisation Limited | Manchester | 2007 |
| Avsouth Limited | Chessington | 1997 |
| Avster Homes Ltd | Cardiff | 2025 |
| Avvenente Ltd | Doncaster | 2024 |
| AW Houses Management Limited | London | 2022 |
| AW Trading Ltd | Halifax | 2025 |
| Awaan Prestige Ltd | London | 2023 |
| Awaken Property Group Limited | Ashford | 2019 |
| Awaly Investments Ltd | Stockport | 2024 |
| Awardhedge Limited | Benfleet | 1995 |
| Awdl Property Ltd | Leigh-On-Sea | 2025 |
| Awdry House Management Company Limited | Chippenham | 2015 |
| Awel Afan (Port Talbot) Management Company Limited | York | 2022 |
| Awel Y Coed Management Company Limited | Swansea | 2012 |
| Awel Y MOR Management Company Limited | Croydon | 2018 |
| Awel Y MOR Pwllheli Management Company Limited | Hemel Hempstead | 2014 |
| Awel Y Mynydd (Pembrey) Management Company Ltd | York | 2023 |
| Awel Ynys RTM Company Limited | Chester | 2021 |
| Awesome Awesomness Limited | Epsom | 2020 |
| Awesome Sauce Ltd | Manchester | 2020 |
| AWH Express Sport Limited | Newport | 2011 |
| AWK Developments Ltd | London | 2021 |
| Awps Property Services Ltd | Birmingham | 2012 |
| Awuah K Limited | Billingham | 2025 |
| AX Private Management Co. Limited | King'S Lynn | 2023 |
| AX Property Services Limited | Oakham | 2024 |
| AX5 Investments Ltd | Harrow | 2024 |
| Axford Court Management Limited | Sittingbourne | 1994 |
| Axholme Holdings Limited | Pontefract | 2016 |
| Axholme Property Limited | Scunthorpe | 2021 |
| Axholme Property Management Limited | Wirral | 2019 |
| Axial Facilities & Maintenance Limited | Edgware | 2023 |
| Axiom Apartments (Bromley) RTM Company Limited | Orpington | 2015 |
| Axion Local Ltd | Swindon | 2025 |
| Axis (Coventry) Management Company Limited | New Milton | 2007 |
| Axis 343 Southchurch Road Southend on Sea Management Limited | Southend-On-Sea | 2005 |
| Axis 4/5 Management Limited | London | 1990 |
| Axis House RTM Company Ltd | London | 2024 |
| Axis Housing Ltd | Leigh | 2025 |
| Axis J9 Management Company Limited | Leamington Spa | 2019 |
| Axis Point Management Limited | Croydon | 2009 |
| Axis Property Limited | Swanley Village | 2016 |
| Axis Tower Management Limited | Manchester | 2018 |
| Axium Centre Management Limited | Dorchester | 2007 |
| Axminster CT Mgmt Company Ltd | Halifax | 2024 |
| Axminster Management Limited | Tiverton | 1990 |
| AXR Golden Eagle Ltd | Oxford | 2023 |
| Ayaan Property Maintenance Limited | Blackburn | 2020 |
| Ayda Stays Ltd | London | 2026 |
| Aydarth Court, 39-41 Oakhill Road (Putney) Residents Association, Limited | London | 1975 |
| Ayes Management Company Limited | Hoddesdon | 1995 |
| AYG Freehold Ltd | Gravesend | 2025 |
| Aykley Woods (Durham) Management Company Limited | Southend-On-Sea | 2016 |
| Aylands (Block a) Management Company Limited | New Barnet | 1990 |
| Aylands (Block C) Management Company Limited | New Barnet | 1990 |
| Aylands (Block D) Management Company Limited | New Barnet | 1990 |
| Aylands (Block E) Management Company Limited | New Barnet | 1990 |
| Aylands (Block G) Management Company Limited | New Barnet | 1990 |
| Aylands (Block H) Management Company Limited | New Barnet | 1990 |
| Aylesbury BED and Furniture Centre Limited | Aylesbury | 2017 |
| Aylesbury Court Management Limited | Banstead | 1981 |
| Aylesbury House RTM Company Limited | Harlow | 2010 |
| Aylesbury Properties Limited | East Sussex | 1987 |
| Aylesbury Street (FS) Management Limited | Luton | 2017 |
| Aylesford Enterprises Limited | Aylesford | 2022 |
| Aylesford Management Company Limited | Croydon | 2003 |
| Aylesford Street (Management) Limited | London | 1996 |
| Aylesham (Central) Residents Management Company Limited | Tarporley | 2023 |
| Aylesham Apartments (Kings Hill) Management Co Ltd | Gillingham | 2011 |
| Aylesham Village (Barratt) Residents Management Company Limited | Canterbury | 2019 |
| Aylesham Village Phase 1B (Aylesham) Residents Management Company Limited | Fulford | 2016 |
| Aylesham Village Phase 2 (Aylesham) Residents Management Co Ltd | Fulford | 2020 |
| Aylesham Village Phase 2B and 2C (Aylesham) Residents Management Company Limited | York | 2023 |
| Aylestone Place Management Limited | London | 2025 |
| Ayleswade Court Freehold Limited | Ringwood | 2014 |
| Ayletts Management Company Limited | Chelmsford | 1988 |
| Aylmer Court RTM Company Ltd | London | 2022 |
| Aylmerton Court Management Company Limited | Letchworth Garden City | 1984 |
| Aylsham Mill Management Company Limited | Norwich | 2016 |
| Aylton Court Management Company Limited | Ledbury | 1991 |
| Aylward 4-10 Ltd | London | 2024 |
| Aylwins Management Company Limited | Epsom | 2011 |
| Ayman Ayat Ltd | London | 2025 |