| A One Acquisitions Ltd | Ferndown | 2015 |
| A One Holdings Limited | Ferndown | 2002 |
| A One London Risk Services Ltd | Ferndown | 2019 |
| A One Southampton Risk Services Ltd | Ferndown | 2020 |
| A P Capital Investments Limited | London | 2010 |
| A P Dental Investments Limited | Chelmsford | 2021 |
| A P Financial Solutions Ltd | Stockport | 2003 |
| A P H Commercial Property Limited | Glossop | 2017 |
| A P H Financial Solutions Limited | Glossop | 2015 |
| A P Holdings Staffs Ltd | Leek | 2026 |
| A P Jess Ltd. | Glasgow | 1976 |
| A P Jones Ltd | Cheltenham | 2008 |
| A P K Financial Services Ltd | Birmingham | 2018 |
| A P Maynard Limited | Norwich | 2026 |
| A P Press Tools Holdings Limited | Sutton Coldfield | 2006 |
| A P Rouse Holdings Limited | London | 2020 |
| A P Technology Group Ltd | Buckie | 2018 |
| A Park & Co Limited | Mauchline | 2023 |
| A Parry FS Ltd | Chester | 2021 |
| A Penny Saved Limited | Wallasey | 2013 |
| A Phab Investments Limited | Derby | 2018 |
| A Phillips Holdings Ltd | Ferryside | 2016 |
| A Pickston Ltd | Alton | 2024 |
| A Place Apart (Oxford) Limited | London | 2023 |
| A Place Apart Holdings Limited | London | 2014 |
| A Place in the Sun Currency Limited | Rickmansworth | 2008 |
| A Plant Developments Ltd | Normanton | 2024 |
| A Plus Capital Partners Ltd | Stevenage | 2025 |
| A Plus CH Consulting Ltd | London | 2025 |
| A Plus Financial Planning Limited | Arbroath | 2013 |
| A Plus Group Holdings Ltd | Stevenage | 2025 |
| A Plus Group of Companies Ltd | Southampton | 2024 |
| A Plus Payment Solutions Ltd | London | 2019 |
| A Poole & SON Holdings Limited | Redditch | 2024 |
| A R Capital Group Limited | London | 2021 |
| A R Exchange Limited | London | 2012 |
| A R Johns Holdings Ltd | Newton Abbot | 2021 |
| A R Mercer Holdings Ltd | Burton-On-Trent | 2018 |
| A R Mortgages Limited | Torquay | 2017 |
| A R Retail Ltd | Saltburn-By-The-Sea | 2011 |
| A R Tennant Holdings Limited | Sheffield | 2014 |
| A R Whitney Ltd | Bow Street | 2013 |
| A Radford Holdings Ltd | Skipton | 2023 |
| A RAE Contracting Holdings | Edinburgh | 2026 |
| A Rampling Financial Services Limited | Widnes | 2017 |
| A Reed Ltd | Knaresborough | 2019 |
| A Rees Holdings Limited | Swansea | 2024 |
| A Reid Holdings Limited | Stockport | 2019 |
| A Riaz Holdings Limited | Worcester | 2014 |
| A Rogers Protection Ltd | Hoddesdon | 2023 |
| A Ruth & Sohn Ltd | Chesham | 2015 |
| A S Financial Limited | London | 2009 |
| A S Gupta Holdings Ltd | Billingham | 2024 |
| A S Hudson Properties Ltd | Bolton | 2023 |
| A S Insurance Services Limited | Rotherham | 2010 |
| A S Investments (NW) Ltd | Preston | 2022 |
| A S K Financial Holdings Ltd | Rochdale | 2017 |
| A S P Fabrications and Holdings Ltd | Swansea | 2025 |
| A S R Financial Limited | Cannock | 2023 |
| A S Ramsay Group Limited | Brighton | 2020 |
| A S Whitaker Investments Limited | Spalding | 2019 |
| A Sabbah Holdings Ltd | Wolverhampton | 2025 |
| A Shade Greener Finance F1 Limited | Barnsley | 2019 |
| A Shade Greener Finance F3 Limited | Barnsley | 2024 |
| A Shade Greener Finance Limited | Barnsley | 2017 |
| A Shade Greener Money PLC | Tankersley | 2013 |
| A Shah Trading Ltd | London | 2025 |
| A Shareholder Newco Limited | London | 2024 |
| A Sharp Holdings Ltd | Leicester | 2026 |
| A Small Victory Limited | London | 2021 |
| A Smith Family Holdings Ltd | Tunbridge Wells | 2026 |
| A Smyth Holdings Limited | Leeds | 2023 |
| A Sohal Investments Limited | West Bromwich | 2025 |
| A Space Designs Holdings Limited | Barnet | 2020 |
| A Square Company Holdings Limited | Liverpool | 2023 |
| A Square Global Consulting Limited | London | 2024 |
| A Star Consultants Limited | Birmingham | 2018 |
| A Star IS Born Limited | London | 2019 |
| A Star Mortgage Services Limited | Leicester | 2021 |
| A Star Mortgages Ltd | Hayes | 2019 |
| A Star Northern Limited | Darlington | 2021 |
| A Star Property Development Limited | Sidcup | 2020 |
| A Star Support Services Group Ltd | Holywell | 2026 |
| A Swanston Financial Limited | Kettering | 2015 |
| A Sweetman Consulting Limited | London | 2025 |
| A T & P Investments Ltd | Guisborough | 2021 |
| A T B Tompson Limited | Milton Keynes | 2014 |
| A T Bone Holdings Ltd | Hertford | 2026 |
| A T Commercial Finance 2 Limited | Chesterfield | 2023 |
| A T Commercial Finance Limited | Chesterfield | 2021 |
| A T Financial Services Ltd | Walsall | 2020 |
| A T Fundell Limited | Norwich | 2012 |
| A T Nurse & Sons Limited | Downham Market | 2020 |
| A Team Holdings Limited | Sittingbourne | 2023 |
| A Third Way Ltd | South Croydon | 2023 |
| A Thousand Hills Ltd | London | 2013 |
| A to B Finance Ltd | Walsall | 2014 |
| A to Z Brothers Limited | London | 2019 |
| A to Z Catering (2008) Limited | London | 2008 |
| A to Z Catering Holdings Limited | Hornsey | 2015 |