| Altona Place Management Limited | Belfast | 2007 |
| Altor Employment Limited | Milton Keynes | 2019 |
| Altrincham Property Ltd | Manchester | 2022 |
| Altruhomes Community Interest Company | Coventry | 2025 |
| Altura Place Management Company Limited | Colchester | 2019 |
| Altus Management Limited | London | 2000 |
| Altus PM Limited | Richmond | 2025 |
| Alulie Limited | Essex | 2005 |
| Alum Bay Management Company Limited | Totland Bay | 2004 |
| Alum Court (Bournemouth) Limited | Bournemouth | 2009 |
| Alum Court Limited | Fordingbridge | 1957 |
| Alum View Management Company Limited | Poole | 2011 |
| Alumdale Court Ltd | Bournemouth | 2003 |
| Alumell Limited | | 1986 |
| Alumhurst Freehold Ltd | Dorset | 2001 |
| Alumhurst Road Management Company Limited | Bournemouth | 2006 |
| Alumhurst Towers Management Limited | Poole | 1994 |
| Aluna Properties Ltd | Tranent | 2023 |
| Aluna Property Management Ltd | Chippenham | 2021 |
| Alund Properties Ltd | Southend-On-Sea | 2025 |
| ALV Property Management Limited | London | 2020 |
| Alva Court E5 RTM Company Ltd | Seaton | 2015 |
| Alvaros Limited | Ilkley | 1984 |
| Alvaston (Guildford) Residents Association Limited | Dorking | 2022 |
| Alvaston Management Company Limited | Uxbridge | 2011 |
| Alvechurch & Barnt Green Property Services Ltd | Birmingham | 2020 |
| Alvechurch Property Maintenance Services Ltd | Birmingham | 2025 |
| Alveley View Management Company Limited | New Milton | 2021 |
| Alver (Madeley) Management Company Limited | Swadlincote | 2021 |
| Alver Park Management (Houses) Limited | Fareham | 2007 |
| Alver Park Management Company Limited | Portsmouth | 1998 |
| Alverley Mews (Doncaster) Management Company Limited | Hoddesdon | 2026 |
| Alverne Lodge (Leamington) Limited | Leamington Spa | 1962 |
| Alvernia Lodge RTM Company Limited | Sutton | 2012 |
| Alverstone Road Management Limited | New Malden | 2024 |
| Alverton Court Management Company Limited | Bournemouth | 1969 |
| Alverton Management Limited | Penryn | 2005 |
| Alverton Manor Management Company Limited | Truro | 2013 |
| Alveston Court Limited | Hove | 1993 |
| Alveston Grange Residents Company Limited | Bristol | 1994 |
| Alveston Park Management Company Limited | Stratford-Upon-Avon | 2006 |
| Alvestone House Management Limited | Send | 2018 |
| Alvex Investment Ltd | Walsall | 2021 |
| Alvia Gardens (Sutton) Management Limited | Redhill | 1987 |
| Alvia Gardens Freehold Company Limited | Redhill | 2017 |
| Alvington Green Management Company Limited | Bristol | 2022 |
| Alvington LEA (Yeovil) Management Company Limited | Somerset | 2002 |
| Alvington Management Company Limited | Weston-Super-Mare | 2015 |
| Alvington Meadows Management Ltd | Ilford | 2019 |
| Alvington Place (Yeovil) Management Company Limited | Taunton | 2009 |
| Alvon Court (Freehold) Limited | Altrincham | 2018 |
| Alvyncourt Management Limited | London | 2022 |
| Always Cleansing Limited | Newton Abbot | 2001 |
| Alwen Court (London) Limited | London | 2024 |
| Alwood House Limited | Farnham | 2007 |
| Alwoodley Chase (Maintenance) Limited | Leeds | 1992 |
| Alwoodley Flats Limited | Settle | 1982 |
| Alwoodley Gates (Leeds) Management Limited | Leeds | 2007 |
| Alwoodley Gates Management Company Limited | Leeds | 2002 |
| Alwoodleyhomes Limited | Leeds | 2023 |
| Alwyne Court Owners Limited | Leatherhead | 2002 |
| Alwynn Management Company Limited | Birmingham | 1989 |
| Alwyns Close Limited | Surbiton | 2019 |
| Alyaan Traders Ltd | Manchester | 2016 |
| Alyn Court RTM Company Limited | Hatfield | 2008 |
| Alyn Meadows Management Company Limited | Croydon | 2012 |
| Alysco Limited | London | 2003 |
| Alzo Properties Ltd | High Wycombe | 2025 |
| AM Estate Holdings Limited | Bury St. Edmunds | 2026 |
| AM Housing Directors Ltd | London | 2022 |
| AM International Property and Investments Limited | Bournemouth | 2021 |
| AM Landscapes (Manchester) Ltd | Ilkeston | 2026 |
| AM Maintenance Contractors Ltd | Ilkeston | 2024 |
| AM PM Property Management Ltd | Brighton | 2024 |
| AM Properties Investment Ltd | Pinner | 2018 |
| AM Property Assistance Ltd | London | 2019 |
| AM Real Estate Group Ltd | London | 2025 |
| AM Residents Limited | Berkhamsted | 2025 |
| AM Residents RTM Company Limited | Sunderland | 2015 |
| AM World Group Limited | Carlisle | 2025 |
| Am's Cleaners Limited | London | 2018 |
| AM3 Property Ltd | Banbridge | 2026 |
| Amaanah Enterprises Limited | Bradford | 2022 |
| Amaara Estates Ltd | Sheffield | 2026 |
| Amabilis Ltd | London | 2009 |
| Amac Properties Limited | London | 2023 |
| Amac Property Group Ltd | Bangor | 2023 |
| Amadeal Property Management Limited | London | 2011 |
| Amaf Property Investments Ltd | Littlehampton | 2022 |
| Amal Property Ltd | Preston | 2018 |
| Amalfi Court Management Limited | Llandudno | 1989 |
| Amam Properties Ltd | London | 2024 |
| Aman Court Limited | Newport | 1985 |
| Aman the Agent Limited | Birmingham | 2021 |
| Amanah Corp Ltd | Woking | 2024 |
| Amanah Holds Ltd | Romford | 2026 |
| Amanah Property Management Ltd | Romford | 2026 |
| Amanda Court Management (Peterborough) Limited | Peterborough | 1971 |
| Amanda Greenland Inventories Limited | Maidstone | 2026 |
| Amanos NW Limited | St. Asaph | 2016 |