| ADD Value Accountants Limited | Mayfield | 2012 |
| ADD Value Projects Limited | Mayfield | 2011 |
| ADD Winehouse Ltd | Liverpool | 2023 |
| ADD2SAVE Ltd | Nottingham | 2020 |
| Adda Catering Ltd | Coventry | 2025 |
| Adda Ecom Ltd | Swindon | 2024 |
| Adda House Ltd | London | 2022 |
| Adda River Ltd | London | 2024 |
| Addabow Ltd | Wrexham | 2021 |
| Addaca Limited | Cardiff | 2013 |
| Addacsaci Power Ltd | London | 2020 |
| Addah Limited | Bradford | 2024 |
| Addai's Enterprise UK Ltd | Rugby | 2017 |
| Addalittleconfettiuk Ltd | Emsworth | 2026 |
| Addamms Ltd | Shrewsbury | 2024 |
| Addan Fort William Ltd | Fort William | 2022 |
| Addar Limited | Bradford | 2023 |
| Addauto Limited | Selby | 2023 |
| Addax London Ltd | London | 2019 |
| Adday Limited | Leek | 2021 |
| Addblast Contracts Ltd | Preston | 2011 |
| Addbuild Contracts Ltd | Darwen | 2023 |
| Addcoffee Ltd | Ashton-Under-Lyne | 2010 |
| Addcolour Trading Ltd | Orrell Wigan | 1986 |
| Addcom Group Ltd | London | 2022 |
| Addcore Limited | Scarborough | 2012 |
| Adddtobasket Ltd | Wembley | 2020 |
| Addeaze Company Ltd | Doncaster | 2018 |
| Added Pharma Ltd | London | 2013 |
| Added Value Concepts Limited | Leeds | 2001 |
| Addenda Synergy Ltd | Peterborough | 2022 |
| Adderbury Store Ltd | Banbury | 2019 |
| Adderet Limited | Stanford-Le-Hope | 2018 |
| Adderley Garage Limited | Market Drayton | 2008 |
| Adderley Green Garage Limited | Staffordshire | 2005 |
| Adderley Holdings Ltd | Market Drayton | 2025 |
| Adderstone Services Limited | Belford | 1996 |
| Addex Group Ltd | Middleton Cheney | 2023 |
| Addex Urban Ltd | Middleton Cheney | 2023 |
| Addey & SON (Western International) Limited | Southall Middlesex | 1958 |
| Addgreen Limited | London | 2023 |
| Addhan Murray Ltd | London | 2025 |
| Addheat Midlands Limited | Dudley | 2015 |
| Addi Traders Limited | London | 2025 |
| Addi-Tec Limited | Manchester | 2005 |
| Addiamo Ltd | Stanley | 2021 |
| Addic Digital Ltd | Northampton | 2023 |
| Addicom Ltd | Tyseley Birmingham | 2024 |
| Addict Traders Ltd | Birmingham | 2019 |
| Addictd Ltd | Balerno | 2020 |
| Addicted 2 Crafts Limited | Birkenhead | 2004 |
| Addicted Devizes Ltd | Devizes | 2007 |
| Addicted Original Ltd | Manchester | 2017 |
| Addicted Vape Limited | Southall | 2018 |
| ADDICTED2LIFE Ltd | Kingston Upon Thames | 2020 |
| Addiction AID UK Ltd | Poole, Dorset | 2025 |
| Addiction Motorsport Ltd | London | 2013 |
| Addiction Suppliers Ltd | Manchester | 2025 |
| Addictive Marketing Ltd | London | 2022 |
| Addictive Merchandise Limited | Derby | 2007 |
| Addictive Mode Limited | Birmingham | 2017 |
| Addiena Aurora Ltd | Twickenham | 2018 |
| Addienix Digital Group Limited | Birmingham | 2025 |
| Addies Distribution Ltd | Guildford | 2026 |
| Addiescart Ltd | Mitcham | 2026 |
| Addiewell Convenience Store Ltd | West Calder | 2014 |
| Addingham Sandwich Shop Ltd | Nr Skipton | 2024 |
| Addington Tyres Ltd | Sutton | 2013 |
| Addington Ltd | Canterbury | 2022 |
| Addington Stores Limited | Walsall | 2000 |
| Addiom Ltd | Luton | 2016 |
| Addis Car Repair Ltd | Manchester | 2026 |
| Addis Commercial Limited | Waterton Industrial Estate | 1972 |
| Addis Fine Art Limited | St. Albans | 2014 |
| Addis France Limited | Waterton Industrial Estate | 1996 |
| Addis Furniture Ltd | London | 2019 |
| Addis Germany Limited | Waterton Industrial Estate | 1996 |
| Addis Group Limited | Waterton Industrial Estate | 1996 |
| Addis Harvest Ltd | London | 2025 |
| Addis Housewares Limited | Waterton Industrial Estate | 1993 |
| Addis Housewares Pension Scheme Trustees Limited | Waterton Industrial Estate | 1996 |
| Addis Leisure Ltd | Glasgow | 2025 |
| Addis Limited | Waterton Industrial Estate | 1996 |
| Addis Trading Ltd | London | 2020 |
| Addiscombe Fruit & VEG Ltd | Croydon | 2018 |
| Addison & Sons Ltd | Blackpool | 2021 |
| Addison Auto Retrofit Ltd | London | 2021 |
| Addison Autos Limited | Ilford | 2013 |
| Addison Cars Ltd | Bedford | 2019 |
| Addison Direct Limited | Wolverhampton | 2024 |
| Addison Motors Limited | Stoke-On-Trent | 1962 |
| Addison Road Garage Limited | Birmingham | 2018 |
| Addison Saws Limited | Stourbridge | 2000 |
| Addison Tyres & Garage Services Ltd | Buckie | 2024 |
| Addison Tyres Limited | Tipton | 2004 |
| Addison's Interiors Ltd | Glossop | 2026 |
| Additey Ltd | Bristol | 2024 |
| Addition Jewelry Ltd | London | 2024 |
| Additional Aids (Mobility) Limited | Whitton | 2012 |
| Additional Lengths Ltd | Stockton On Tees | 2007 |