| ACS Holdings (Lancs) Limited | Haslingden | 2021 |
| ACS Homes Limited | Neston | 2007 |
| ACS Investment Group Ltd | Liverpool | 2025 |
| ACS Investments Limited | London | 2018 |
| ACS Land & Property Limited | Hayle | 2017 |
| ACS Lofthouse Homes Ltd | Beckenham | 2025 |
| ACS Magnolia Limited | London | 2013 |
| ACS Property Consultants Limited | Camberley | 1999 |
| ACS Property Development Ltd | Belfast | 2025 |
| ACS Property Group Limited | Manchester | 2025 |
| ACS Property Ltd | Heckmondwike | 2025 |
| ACS Rental Property Ltd | St. Helens | 2023 |
| ACS UK Properties Ltd | Leicester | 2019 |
| ACS31 Ltd | Aberdeen | 2023 |
| Acsa Investments Ltd | Wirral | 2026 |
| Acsc Assets Limited | Glasgow | 2019 |
| Acsi Properties Ltd | Letchworth Garden City | 2023 |
| Acsini Investments Limited | Blackburn | 2017 |
| Acsis Property Ltd | Cambridge | 2024 |
| Acsk Properties Limited | London | 2024 |
| Acsl Properties Limited | Chelmsford | 2016 |
| Acsm Holdings Ltd | Glasgow | 2026 |
| Acsr Estates Ltd | Barrow-In-Furness | 2026 |
| Acss Properties Limited | Edgware | 2021 |
| Acss Residential Limited | London | 2025 |
| ACT (Luton) Limited | Luton | 2016 |
| ACT (Midlands) Limited | Sutton Coldfield | 1986 |
| ACT 1 Investments Ltd | Knutsford | 2025 |
| ACT 22 Limited | Audenshaw | 2023 |
| ACT 22 Malta Ltd | London | 2024 |
| ACT Accordingly Limited | Ilkeston | 2020 |
| ACT Asset Management Ltd | London | 2025 |
| ACT Estates Limited | Ickford | 2018 |
| ACT Holland Park Ltd | London | 2023 |
| ACT Investment Northants Limited | Northampton | 2017 |
| ACT Lettings Management Ltd | London | 2025 |
| ACT Property Investments Ltd | Liverpool | 2018 |
| ACT Property Investors Limited | Leigh On Sea | 2020 |
| ACT Property Leasing Ltd | Dundee | 2021 |
| ACT Property Limited | Manchester | 2016 |
| ACT Property Management Limited | Hounslow | 2024 |
| ACT Property Mgmt Ltd | Rowley Regis | 2023 |
| ACT Property Mgmt Services Ltd | Rowley Regis | 2026 |
| ACT Renewables Limited | Camborne | 2011 |
| ACT Rentals Ltd | Tarporley | 2024 |
| ACT Roadways Limited | Benfleet | 2014 |
| ACT York Limited | York | 2018 |
| Act-Fast Property Company Limited | London | 2017 |
| Acta Proprietas Ltd | Hull | 2023 |
| Actaris Group Limited | Hertfordshire | 2025 |
| Actarose Limited | | 1994 |
| Actb Properties Ltd | Southport | 2023 |
| Actc Investments Ltd | St. Neots | 2026 |
| Acteon Group Properties Limited | Norwich | 2008 |
| Actexact Group Limited | Liverpool | 2024 |
| Actexact Limited | Liverpool | 2019 |
| Acti Properties Ltd | Saffron Walden | 2021 |
| Actica Commercial Property Ltd | Guildford | 2017 |
| Actif Capital Ltd | Norwich | 2025 |
| Actif Estates Ltd. | Manchester | 2002 |
| Actif Management Limited | Manchester | 1996 |
| Actif Real Estate Ltd | Tyldesley | 2019 |
| Actify Property Solutions Limited | Newry | 2018 |
| Actiman Ltd | Bourne End | 2010 |
| Actimise Limited | Birmingham | 2025 |
| Actin Holdings Limited | London | 2025 |
| Actinium Property Ltd | Romford | 2022 |
| Action Accommodation Ltd | London | 2016 |
| Action Estates Limited | Worksop | 2016 |
| Action Estates Services Ltd | Leicester | 2023 |
| Action Homes & Property Limited | Harrow | 2021 |
| Action House Services Limited | Peterborough | 2017 |
| Action Invesments (International) Limited | London | 2026 |
| Action Invest Ltd | London | 2019 |
| Action Investments Ltd | Bath | 2023 |
| Action Law UK Ltd | Hereford | 2019 |
| Action LET Ltd | Cardiff | 2019 |
| Action Lettings Ltd | London | 2016 |
| Action Prestige Properties Limited | Ringwood | 2023 |
| Action Properties Management & Maintenance Services Ltd | Stratford-Upon-Avon | 2012 |
| Action Property 76 Limited | Aylesbury | 2026 |
| Action Property Limited | Ramsgate | 2015 |
| Action Property Management Limited | Leeds | 2007 |
| Action Property Personnel Limited | Scarborough | 2009 |
| Action Quick Limited | London | 2013 |
| Action Real Estates Ltd | Leicester | 2024 |
| Action Station 5 Limited | Wimborne | 2024 |
| Action Training (Stoke) Ltd | Greater Manchester | 2002 |
| Action Two Propertis and Management W.L.L Limited | London | 2025 |
| Actiongold Limited | Beverley | 2004 |
| Actioning (UK) Ltd | London | 2018 |
| Actionlake Properties Limited | Hungerford | 1993 |
| Actionmanor Limited | Stevenage | 2007 |
| Actionpace Limited | Luton | 1996 |
| Actionside Property Management Limited | | 1986 |
| Actionstem Limited | Shepton Mallet | 2000 |
| Actiontower Limited | London | 1985 |
| Actionworth Limited | Woodford Green | 1995 |
| Actionzone Rentals Limited | Newport | 2025 |
| Actipharm Property Management Services Ltd | London | 2014 |