| Alderton Residents Management Company Limited | Dordon | 2025 |
| Aldertons Farm Residents Company Limited | Send Woking | 2015 |
| Alderwick Services Ltd | Edinburgh | 2026 |
| Alderwood Barns Management Company Limited | Romford | 2012 |
| Alderwood Gardens Residents Management Company Limited | Bolton | 2023 |
| Alderwood House RTM Company Ltd | Woodford Green | 2023 |
| Alderwood Lane Management Ltd | Ballyclare | 2016 |
| Alderwood Management Company Limited | London | 1981 |
| Aldford House Freehold Limited | London | 2013 |
| Aldford House Management Limited | London | 2019 |
| Aldford House RTM Company Ltd | London | 2013 |
| Aldgate Triangle Resident Management Company Limited | Chester | 2023 |
| Aldhelm Court Management Company Limited | Croydon | 2017 |
| Aldhelm Rise Properties Limited | Bristol | 2023 |
| Aldhurst View (Leiston) Residents Management Company Limited | Fulford | 2025 |
| Aldin Properties Ltd | Wembley | 2022 |
| Aldinga Ltd | Brentwood | 2019 |
| Aldingbourne House Management Company Limited | Bognor Regis | 1993 |
| Aldington Gate Management Company Limited | Bagshot | 2018 |
| Aldis Close Management Company Limited | Norwich | 2011 |
| Aldis Close Upkeep Company Limited | Cromer | 2020 |
| Aldon House Management Company Limited | Taunton | 2006 |
| Aldous House Management Company Limited | Cambridge | 1988 |
| Aldridge Farm Management Company Ltd | Wolverhampton | 2025 |
| Aldridge Fields Management Limited | Atherstone | 2008 |
| Aldridge Road Villas Freehold Limited | Potters Bar | 2012 |
| Aldridge Road Villas Management Limited | London | 2007 |
| Aldridge Road Villas NO 32 Limited | Barnet | 2006 |
| Aldwick Bay Company Limited | Bognor Regis | 1988 |
| Aldwick Court Management Limited | London | 1989 |
| Aldwick Grange Residents' Association Limited | Bognor Regis | 1976 |
| Aldwick Place Residents Association Limited | Littlehampton | 1967 |
| Aldwick Property Management Limited | Arundel | 2015 |
| Aldworth Residents Company Limited | Camberley | 1984 |
| Aldworth Rise Forecourt Ltd | Reading | 2019 |
| Aldwych Chambers Limited | London | 2026 |
| Aldwych Court Limited | Edenbridge | 2016 |
| Aldwyn Tower Management Company Limited | Solihull | 2009 |
| Aldykes Management Limited | Hertford | 2008 |
| Alec Court Management Company Limited | Southampton | 1982 |
| Alec Hare Management Co Ltd | Malton | 2016 |
| Alee Management Services Ltd | St. Albans | 2024 |
| Aleksss Ltd | London | 2013 |
| Aleksy Property Management Ltd | Manchester | 2024 |
| Alem Property Management Ltd | London | 2020 |
| Alers Road Estate Residents Society Limited(The) | Bexleyheath | 1982 |
| Alesec Ltd | Manchester | 2025 |
| Alex Charles Limited | Woodford Green | 2024 |
| Alex Homes Ltd | Hoddesdon | 2021 |
| Alex Mcwaters Properties Limited | Gourock | 2019 |
| Alexa Apartments RTM Company Limited | Harlow | 2023 |
| Alexander and Nicholas Courts Management Limited | Reading | 1979 |
| Alexander Blackpool Ltd | Leamington Spa | 2024 |
| Alexander Close (Irby) Management Company Limited | Hoylake | 2021 |
| Alexander Close Management Company Limited | Kent | 2022 |
| Alexander Court (Cheshunt) Management Company Limited | Bishop'S Stortford | 1990 |
| Alexander Court (Church Farm) Management Company Ltd | Oxford | 2026 |
| Alexander Court (Crediton) Management Company Limited | Devon | 2003 |
| Alexander Court (Glenfield) Limited | Leicester | 1975 |
| Alexander Court (Management) Company Limited | Southport | 1980 |
| Alexander Court (Richmond Park) Limited | Bournemouth | 2000 |
| Alexander Court (Southampton) Management Limited | Southampton | 1984 |
| Alexander Court (Stoke on Trent) Management Company Limited | Stafford | 2005 |
| Alexander Court (Surbiton) Residents Association Limited | Surbiton | 1973 |
| Alexander Court Flats Management Co Limited | Scarborough | 1992 |
| Alexander Court Ltd | High Wycombe | 2017 |
| Alexander Court Management Company (Shortlands) Limited | Bromley | 1986 |
| Alexander Court Management Services Limited | Sittingbourne | 1988 |
| Alexander Court Surbiton Management Company Limited | Surbiton | 2013 |
| Alexander Court Swanage Limited | Andover | 2010 |
| Alexander Flats Limited | London | 2004 |
| Alexander Gardens Management Company Limited | Derby | 2021 |
| Alexander Gate Management Company Limited | Tarporley | 2018 |
| Alexander George & Co (Investments) Ltd. | Ayrshire | 1983 |
| Alexander Grove (Swarland) Management Company Limited | Newcastle Upon Tyne | 2020 |
| Alexander Hawthorn Management Limited | Cardiff | 2014 |
| Alexander Hawthorne Asset Ltd | Slough | 2021 |
| Alexander Heights Residents Management Company Limited | Essex | 2000 |
| Alexander Herne House Limited | London | 2016 |
| Alexander House (1 ST Annes Road) Residents Management Company Limited | Gainsborough | 2019 |
| Alexander House (Corsham) Management Company Limited | Corsham | 1991 |
| Alexander House (Exeter) Management Company Limited | Exmouth | 2020 |
| Alexander House (Murdoch Road) Management Company Limited | Crowthorne | 2009 |
| Alexander House (the Village) Management Company Limited | Bourne End | 2003 |
| Alexander House Barry Management Company Limited | Barry | 2017 |
| Alexander House Management Co. Limited | Shrewsbury | 2000 |
| Alexander James Property Group Ltd | Birmingham | 2023 |
| Alexander Kane Estates Ltd | Bootle | 2025 |
| Alexander Lane Management Company Limited | Chelmsford | 2025 |
| Alexander Lewis Kensington Ltd | London | 2022 |
| Alexander Lodge Freehold Company Limited | Sutton | 2022 |
| Alexander Lodge Management Company Limited | Bournemouth | 1993 |
| Alexander Mews Limited | Edgware | 2002 |
| Alexander Mews Management Limited | Newark | 2018 |
| Alexander Park (Aldershot) Residents Management Company Limited | Hemel Hempstead | 2026 |
| Alexander Park Management Company Limited | Redruth | 2021 |
| Alexander Studios Management Limited | London | 1999 |
| Alexander Terrace Management Company Limited | Littlehampton | 2006 |
| Alexanders Farm Buildings Management Company Limited | Ewshot | 1990 |
| Alexandra (Kingston) Management Limited | Surrey | 1979 |