| Advantage Apartments Limited | Sidmouth | 1999 |
| Advantage Asset Maintenance and Management Ltd | Usk | 2023 |
| Advantage Assets Ltd | Cardiff | 2024 |
| Advantage Bay One Ltd | Liverpool | 2025 |
| Advantage Book Company Limited | Hope Valley | 1970 |
| Advantage Development Group Limited | Scunthorpe | 2026 |
| Advantage Estates Limited | Dorking | 2000 |
| Advantage H London Limited | Harrow | 2025 |
| Advantage Herts Ltd | Watford | 2018 |
| Advantage Homes Limited | Sidmouth | 1999 |
| Advantage Homes Peterborough Ltd | Peterborough | 2025 |
| Advantage Housing Limited | Sidmouth | 1999 |
| Advantage Investment Ltd | Liverpool | 2020 |
| Advantage K Properties Ltd | Slough | 2018 |
| Advantage Land and Property Limited | Poynton | 2015 |
| Advantage Land Promotion Opportunities Limited | Stockport | 2017 |
| Advantage Lettings and Management Ltd | Liverpool | 2024 |
| Advantage Power Ltd | Doncaster | 2022 |
| Advantage Premium Homes Limited | Sheffield | 2019 |
| Advantage Property Group Ltd | Rochdale | 2022 |
| Advantage Property Limited | Billingham | 2025 |
| Advantage Property Management Limited | Birkenhead | 2018 |
| Advantage Property Solutions Ltd | London | 2024 |
| Advantage Real Estate Ltd | Liverpool | 2024 |
| Advantage Residential Ltd | Dartmouth | 2017 |
| Advantage Rock Ltd | London | 2014 |
| Advantage Star Homes Ltd | London | 2017 |
| Advantage Umbrella Limited | London | 2012 |
| Advantages Properties Ltd | Rainham | 2024 |
| Advantagious Ltd | Manchester | 2025 |
| Advantis Properties Ltd | Stalybridge | 2014 |
| Advantis Property Group Ltd | Sutton | 2025 |
| Advantis Property Ltd | Newcastle Upon Tyne | 2023 |
| Advantix Properties Ltd | London | 2022 |
| Advantlets Ltd | Grimsby | 2023 |
| Advaprime Limited | | 1985 |
| Adveka Holdings Ltd | Derby | 2026 |
| Advent Agriland Limited | Ballymena | 2022 |
| Advent Commercial Property Ltd | Leatherhead | 2026 |
| Advent Domestic Property Ltd | Leatherhead | 2026 |
| Advent Enterprises Limited | Leicester | 2002 |
| Advent Estates Limited | Hereford | 1998 |
| Advent Holdings Limited | Hereford | 2025 |
| Advent House Limited | Liverpool | 2024 |
| Advent Letting Ltd | Wallsend | 2019 |
| Advent Management UK Limited | Hinckley | 2005 |
| Advent Planning Limited | Rushden | 2017 |
| Advent Prop Limited | Harrow | 2025 |
| Advent Property (Guildford) Ltd | Guildford | 2024 |
| Advent Property Ltd | London | 2017 |
| Advent Property Management Ltd | Bexleyheath | 2020 |
| Advent Property Services Limited | Ilkeston | 2001 |
| Adventics Homes Limited | Wakefield | 2023 |
| Adventruss Limited | Birmingham | 2020 |
| Adventum Portfolio Ltd | New Eltham | 2023 |
| Adventum Property Limited | Tonbridge | 2022 |
| Adventum Wealth Ltd | Manchester | 2015 |
| Adventure Assets Ltd | Camberley | 2022 |
| Adventure Care Limited | Buxton | 2003 |
| Adventure Developers Ltd | Slough | 2025 |
| Adventure Development Limited | Reading | 2024 |
| Adventure Digs Limited | Bristol | 2022 |
| Adventure Homes Ltd | Enfield | 2017 |
| Adventure Investments Ltd | Doncaster | 2024 |
| Adventure North West Ltd | Blackburn | 2014 |
| Adventure Northern Escapes Limited | London | 2022 |
| Adventure Property Investments Limited | London | 2026 |
| Adventure Property Limited | Chester | 2024 |
| Adventure Property Services Limited | London | 2019 |
| Adventure Trails Ltd | Milnthorpe | 2010 |
| Adventurers Properties Ltd | Horsham | 2025 |
| Adventures in Property Limited | Barnard Castle | 2010 |
| Adventures in Rentals Ltd | Barnard Castle | 2022 |
| Adventurous Investors Ltd | Neston | 2022 |
| Adventus Investments Limited | London | 2025 |
| Adversis Limited | London | 2020 |
| Adversity Investments Ltd | London | 2020 |
| Advertdealer Limited | Leigh-On-Sea | 1996 |
| Advertiser and Times Limited | Milton Keynes | 2012 |
| Advertising Site Management Limited | Banbury | 2000 |
| Advertisingsales.Co.Uk Limited | Tonbridge | 2000 |
| Adverto Properties Ltd | Gloucester | 2026 |
| Advertorial & Promotional Services Limited | Tenterden | 1984 |
| Advest-Co Ltd | Chatham | 2016 |
| Advestage Ltd | Romford | 2016 |
| Advg Properties Limited | Manchester | 2024 |
| Advice & Guidance Ltd | London | 2021 |
| Advik Properties Limited | Heanor | 2019 |
| Advina Homes Ltd | Royal Leamington Spa | 2015 |
| Advina Properties Limited | Pinner | 2025 |
| Adviser (156) Limited | Exeter | 1990 |
| Advisermove Ltd | Weston-Super-Mare | 2020 |
| Advisewatch Limited | Edinburgh | 1991 |
| Advising Today Ltd | Tring | 2024 |
| Advision International Ltd | Ilford | 2022 |
| Advisorous Limited | Shepton Mallet | 2025 |
| Advisory People Ltd | Salford | 2022 |
| Advisory Prime Limited | Barnet | 2024 |
| Advizio PG UK Limited | Chelmsford | 2023 |
| Advo Property Ltd | Harrogate | 2020 |