| Adams Watch Specialist Ltd | Aberdeen | 2018 |
| Adamson Berekoff Limited | Sutton | 2013 |
| Adamson Fisher Limited | Newmarket | 2022 |
| Adam’S Barbers 11 Ltd | Grantham | 2026 |
| Adan UK Property Limited | London | 2022 |
| Adana Barber Shop Ltd | Glasgow | 2025 |
| Adana Barbers Ltd | Loughborough | 2018 |
| Adana Turkish Barber Ltd | Sutton Coldfield | 2023 |
| Adanami Limited | London | 1997 |
| Adanna Management Limited | Glasgow | 2023 |
| Adaobiartistry Limited | Barking | 2024 |
| Adaora Beauty Limited | Woolwich | 2025 |
| Adaora Gold Limited | Erith | 2019 |
| Adapon Design Limited | Inverclyde | 2007 |
| Adapt (UK) Training Services Limited | Liverpool | 2008 |
| Adapt Beauty & Aesthetics Ltd | Carlisle | 2021 |
| Adapt Contracts Ltd | Bournemouth | 2009 |
| Adapt Pharma Ltd | West Sussex | 2018 |
| Adapt Studios Limited | Oldham | 2012 |
| Adapt Wellness Ltd | Poole | 2023 |
| Adapt With Ashley Limited | Washington | 2025 |
| Adapt Your World Ltd | Forfar | 2024 |
| Adaptable Solutions Partner Limited | Cheltenham | 2011 |
| Adaptation Station Ltd | Wimborne | 2011 |
| Adaptcharge Limited | London | 2024 |
| Adaptive Drywall Solutions Ltd | Widnes | 2021 |
| Adaptive Pest Control Limited | Bonnyrigg | 2009 |
| Adaptive Process Solutions Ltd | Aberdeen | 2021 |
| Adaptive Systems (NW) Ltd | Widnes | 2021 |
| Adaptlocks Ltd | Winnersh | 2023 |
| Adaptogenica UK Ltd | Milton Keynes | 2025 |
| Adaptpersonaltraining Ltd | Lancaster | 2025 |
| Adar Beauty Ltd | London | 2025 |
| Adar Style Ltd | Gosport | 2026 |
| Adara Hair and Beauty Therapy Limited | Smethwick | 2017 |
| Adara Wargaming Limited | Tamworth | 2025 |
| Adara Yachts UK Ltd | London | 2025 |
| Adaraz Touch Ltd | London | 2022 |
| Adare LM Clinic UK Limited | Stanmore | 2024 |
| Adaret Limited | Teddington | 2024 |
| Adas Aish Kodesh (MCR) Ltd | Salford | 2025 |
| Adasii Ltd | London | 2020 |
| Adass Yeshurun Synagogue | Salford | 2017 |
| Adastra Operating Limited | Wallington | 2017 |
| Adatrans TD Ltd | Hull | 2017 |
| Adatwa Marketing Ltd | Enfield | 2013 |
| Adaugo Signature Cuts Limited | Manchester | 2025 |
| Adax Springs Limited | London | 2024 |
| Adays Multi Services Company Ltd | Dudley | 2024 |
| ADB Trading Ltd | Worksop | 2019 |
| ADB Alarms Southern Ltd | Stoke-On-Trent | 2010 |
| Adbar Investments Limited | Stratford On Avon | 2025 |
| Adbk Holdings Limited | Walsall | 2018 |
| Adbmc Scot Limited | Glasgow | 2024 |
| Adbrian Ltd | Erith | 2020 |
| Adbyside Limited | London | 2020 |
| ADC Alliance UK | Welwyn Garden City | 2026 |
| ADC Interior Concepts Limited | Lutterworth | 2008 |
| ADC Trading Limited | Walsall | 2011 |
| Adcarpentry & Construction Ltd | Bodmin | 2016 |
| Adceed Limited | Plymouth | 2015 |
| Adco Curtains Limited | London | 2004 |
| Adcomat Storage Ltd | Newcastle Upon Tyne | 2019 |
| Adcumulo Ltd | London | 2020 |
| ADD a Little Sparkle Lancs Limited | Leyland | 2017 |
| ADD Barber Ltd | Clacton-On-Sea | 2025 |
| ADD Group Holdings Limited | Leicester | 2014 |
| ADD Signs Designs Ltd | Alton | 2014 |
| ADD Style UK Limited | Reading | 2008 |
| ADD to My Income Limited | Newton Abbot | 2011 |
| Added Dimension Limited | Reading Berkshire | 1995 |
| Added Value Accounting (2000) Limited | Middlesex | 1999 |
| Added Value Enterprises Limited | Worcester | 2016 |
| Added Value Solutions Limited | Chesterfield | 2014 |
| Addi Motors Ltd | Nottingham | 2017 |
| Addicted Limited | Barnsley | 2013 |
| Addiction Tattoos Ltd | Yateley | 2019 |
| Addictions 2 Limited | Burntwood | 2022 |
| Addictive Art Tattoo Ltd | Enderby | 2022 |
| Addictive Publishing Ltd | London | 2026 |
| Addie Fashion Ltd | London | 2014 |
| Adding UP Ltd. | Motherwell | 2018 |
| Addingham Barbers Limited | Ilkley | 2023 |
| Addington DRY Cleaners Limited | Sidcup | 2014 |
| Addington Mount Ltd | Hainault Business Park | 2023 |
| Addiscombe Barbers 1 Ltd | Croydon | 2026 |
| Addiscombe DRY Cleaners Ltd | Croydon | 2024 |
| Addismiller Limited | Enfield | 2019 |
| Addison & Bhandari Consultants Limited | London | 2019 |
| Addison & Lans Ltd | Telford | 2000 |
| Addison 613 Limited | London | 2026 |
| Addison Trimz Ltd | Isleworth | 2020 |
| Addison's Hair Ltd | Bristol | 2023 |
| Additae Valorem Limited | Warwick | 2015 |
| Additional Self Storage Limited | Fareham | 2007 |
| Additions Aesthetics Ltd | London | 2022 |
| Additions Hair Salon Limited | Colchester | 2023 |
| Addits (UK) Ltd | London | 2012 |
| Addix Group Limited | Bridgend | 2025 |
| Addjuvare Limited | Barnstaple | 2014 |