| A-L Nails Limited | Stoke On Trent | 2021 |
| A-List Lace Hair Studio Ltd | Gravesend | 2018 |
| A-Maze-Ing Career Coach Limited | High Wycombe | 2025 |
| A-N-S Design Limited | London | 2025 |
| A-One Nails & Spa TN Ltd | London | 2018 |
| A-Paraiso Ltd | London | 2022 |
| A-Plus Clinic Ltd | London | 2024 |
| A-Sisterhood Ltd | Rushden | 2017 |
| A-Star (Mexborough) Barber Ltd | Mexborough | 2022 |
| A-Star Aesthetic Training Ltd | Wisbech | 2023 |
| A-Star Cleaning Care Limited | London | 2017 |
| A-Star Cosmetics Ltd | Wisbech | 2023 |
| A-Star Therapies Ltd | Grays | 2014 |
| A-Ster Makeup Limited | London | 2017 |
| A-Team Barbers Ltd | Birmingham | 2025 |
| A-Team Cleaning and Maintenance Ltd | Hove | 2010 |
| A-Team Consulting Limited | Norwich | 2001 |
| A-Tech Consulting Ltd | Cambridge | 2010 |
| A-Trainer Limited | Reigate | 2017 |
| A-Z Barbers Cardiff Ltd | Cardiff | 2021 |
| A-Z Dogs Limited | Dorking | 2011 |
| A-Z Mobile Ltd | Neath | 2017 |
| A-Z Prestige Limited | Edgware | 2019 |
| A-Z Storage Ltd | Heywood | 2024 |
| A-Zaba Limited | London | 2025 |
| A. & G. Huteson Ltd | Sutton Coldfield | 2010 |
| A. & M. Hadfield (Funeral Directors) Limited | Barnsley | 1981 |
| A. & W. Goddard Limited | Alton | 1955 |
| A. Abbott and Sons (Rushden) Limited | Rushden | 1949 |
| A. B. Locksmith Ltd | Aldershot | 2025 |
| A. Bakewell Domestic Appliances Limited | Nottingham | 2010 |
| A. Blacow Films Limited | Stevenage | 2021 |
| A. Burns Limited | Stockport | 2001 |
| A. Burnton Limited | Swadlincote | 1998 |
| A. Butler & Sons (Holdings) Limited | London | 2007 |
| A. C. a. Limited | London | 1961 |
| A. C. Cleaning Services Ltd | Birmingham | 2015 |
| A. C. Framing (Sales) Limited | Huddersfield | 1968 |
| A. Cooksey Upholstery Limited | Coventry | 2020 |
| A. D. Cycles Limited | Hassocks | 2017 |
| A. DEL RIO & Company Limited | North Harrow | 1986 |
| A. Featherstone Limited | Kent | 1997 |
| A. Galla Funeral Directors Ltd | London | 2013 |
| A. Garner CNC Ltd | Leicester | 2005 |
| A. Green Properties Limited | Shenstone | 2017 |
| A. Hamblin Ltd | Warwick | 2018 |
| A. Hester Limited | Guildford | 1990 |
| A. Heuer Services Limited | Enfield | 2020 |
| A. Holden & SON (Littleborough) Limited | | 1964 |
| A. Hunt & Co (City) Limited | London | 2009 |
| A. J. Bullingham Landscaping & Gardening Contractors Ltd | Cheltenham | 2003 |
| A. J. Coggles Family Funeral Directors Limited | King'S Lynn | 2022 |
| A. J. Neumann & Co. Limited | Hertfordshire | 1960 |
| A. J. Welling Limited | Derbyshire | 2007 |
| A. K. Ventures Limited | London | 2007 |
| A. K. Hirani Limited | Ilford | 2000 |
| A. Kalli Franchising Limited | London | 2014 |
| A. L. Birkenshaw Limited | Leeds | 2005 |
| A. L. Sole & SON Limited | Chipping Norton | 2014 |
| A. M. DRY Cleaners 2025 Limited | London | 2024 |
| A. Macaulay Limited | Isle Of Lewis | 1946 |
| A. Muir Limited | Epsom | 2007 |
| A. Mullins Design Ltd | Dorchester | 2009 |
| A. P. Miller Limited | Acton | 2011 |
| A. Pargetter & SON Limited | Coventry | 1957 |
| A. Parsons Services Limited | Cheddar | 2008 |
| A. Pignone Services Ltd | Tring | 2013 |
| A. Potter Services Ltd | Market Harborough | 2013 |
| A. R. DRY Cleaners Ltd | Middlesex | 2016 |
| A. R. I. Environmental Services Limited | Driffield | 1999 |
| A. Rafael Advisory Ltd | Bristol | 2026 |
| A. Richards & SON (Battersea) Limited | Crowborough | 1959 |
| A. S. E. T. S. (U. K.) Ltd | Blackpool | 1996 |
| A. Schierz Ltd | London | 2018 |
| A. Slade and SON Ltd | Cirencester | 2013 |
| A. Smith (Memorials) Limited | Surrey | 2003 |
| A. Souto Importers Limited | North Harrow | 2009 |
| A. W. Training Services Ltd | Cannock | 2024 |
| A. Wass Funeral Directors Limited | Mansfield | 2009 |
| A. White and Sons (Funeral Services) Limited | Crediton | 2004 |
| A.1. Services (Southern) Limited | Chobham | 2015 |
| A.A General Services Ltd | Southampton | 2023 |
| A.A. Carpet, Upholstery and Curtain Cleaners Ltd | Enfield | 2019 |
| A.A. Domestic Repairs & Services Ltd | Dundee | 2019 |
| A.Aesthetics Clinic Ltd | Denton | 2023 |
| A.B HCW Ltd | Romford | 2025 |
| A.B Martin and SON Limited | Hampshire | 1999 |
| A.B Picture Ltd | Ilford | 2015 |
| A.B. Carpets Limited | Croydon | 1977 |
| A.B. Rooms & SON Limited | Hull | 2000 |
| A.B.C First AID Training Solutions Ltd | Saffron Walden | 2013 |
| A.B.C. Glass Processing Employees Trustee Limited | Portsmouth | 2023 |
| A.B.L Global Funding Limited | London | 2024 |
| A.B.M. Leisure Limited | Tremorfa | 1985 |
| A.B.M. Music International Limited | Hayes | 2008 |
| A.B.N. Maintenance Limited | Leigh-On-Sea | 2004 |
| A.B.P.S. Exhibitions Limited | Bexhill-On-Sea | 1995 |
| A.B.S.L. Limited | Kent | 2000 |
| A.B.Taylor Funeral Services Limited | Birmingham | 1959 |
| A.B.Walker & SON Limited | Berks | 1953 |