| Adrenaline Sports & Leisure Ltd | Huntingdon | 2023 |
| Adrenalyze Leisure Ltd | Colchester | 2016 |
| Adrian B Mcmurchie Limited | Glasgow | 2015 |
| Adrian Bell Sound Limited | London | 2013 |
| Adrian Bullers Limited | Bedfordshire | 2003 |
| Adrian Chesterman Ltd | Wokingham | 2024 |
| Adrian Fekete Limited | London | 2018 |
| Adrian Fisher Design Limited | Blandford Forum | 2008 |
| Adrian Getley Limited | | 2002 |
| Adrian Gibbons Racing Ltd | Essex | 2015 |
| Adrian Gibson Music Productions Limited | Guildford | 2008 |
| Adrian Jackpot Lewis Limited | Stoke-On-Trent | 2015 |
| Adrian Johnston Limited | Peterborough | 1999 |
| Adrian Margey Artwork Ltd | Portstewart | 2014 |
| Adrian Mead Ltd. | Edinburgh | 2001 |
| Adrian Morley Services Limited | Salford | 2015 |
| Adrian Pierce Business Development Ltd | York | 2015 |
| Adrian Snell Production Services Limited | Torpoint | 2003 |
| Adrian Steele Pianos Limited | Kent | 2003 |
| Adrian Wintle Racing Limited | Westbury-On-Severn | 2015 |
| Adriano Sound Ltd | Edinburgh | 2025 |
| Adriatic Entertainment UK Limited | London | 2024 |
| Adrift Pictures Ltd | Chester | 2016 |
| Adroit Sports Management (ASM) Ltd | Luton | 2019 |
| Adrt Cycling Limited | Insch | 2021 |
| ADS Atelier Ltd | London | 2025 |
| ADS Bouncy Castles Ltd | Manchester | 2021 |
| Adscad Limited | Sunbury-On-Thames | 2016 |
| Adsportuk Limited | Ripon | 2026 |
| Adsu Art Service Ltd. | Cleethorpes | 2012 |
| ADT Golf Studios Ltd | Brighouse | 2025 |
| ADT Leisure Limited | Newport | 2025 |
| Adult Dreams XXX Ltd | London | 2025 |
| Adult Panto Limited | Hitchin | 2017 |
| Adulthood Limited | Liverpool | 2020 |
| Adults Entertained Ltd | London | 2022 |
| Adumbration Arts Ltd | Wallingford | 2020 |
| Adun Music Ltd | Rainham | 2024 |
| Adur and Worthing Trust Limited | Shoreham By Sea | 2011 |
| Adur Indoor Bowling Club Limited | Southwick | 1988 |
| Adur Sailing Club Limited | Shoreham By Sea | 2024 |
| Adura Entertainment & Services Ltd | Erith | 2023 |
| ADV Dance Academy Limited | Glasgow | 2025 |
| ADV. Three Ltd | East Linton | 2019 |
| ADV. Two Ltd | East Linton | 2019 |
| Advance Basketball Ltd | Rotherham | 2023 |
| Advance Batting Academy Ltd | Harlow | 2024 |
| Advance Bodies & Conditioning Ltd. | Motherwell | 2012 |
| Advance Driver Management Ltd | Amersham | 2022 |
| Advance Grass Solutions Ltd | Nottingham | 2017 |
| Advance Gym Ltd | Reading | 2019 |
| Advance Industrial Services Group Limited | Winnick Quay | 1993 |
| Advance Leisure Amusements Limited | Hornchurch | 2010 |
| Advance Motion Pictures Ltd | Leicester | 2023 |
| Advance Player Development 2018 Ltd | Hemel Hempstead | 2018 |
| Advanced Angling Ltd | Christchurch | 2012 |
| Advanced Body Conditioning Limited | Leigh On Sea | 2017 |
| Advanced Climbing Solutions Limited | Keighley | 2021 |
| Advanced Equine Surfaces Limited | London | 2021 |
| Advanced Golf Ltd | Telford | 2010 |
| Advanced Golf Techniques Ltd. | Glasgow | 2012 |
| Advanced Impactor Limited | Abingdon | 2025 |
| Advanced Martial Arts Ltd | West Bromwich | 2024 |
| Advanced Military Experience Ltd | Prescot | 2020 |
| Advanced Race Coaching Ltd | Nottingham | 2026 |
| Advanced Simulation Research | Southampton | 2016 |
| Advanced Sports Ltd | Oxford | 2010 |
| Advanpress Limited | Horley | 1958 |
| Advantage Fitness Ltd | Charfield | 2013 |
| Advantage Hospitality Limited | Shepherds Bush | 2002 |
| Advantage Padel CO1 Ltd | London | 2025 |
| Advantage Performance Coaching Limited | Hinckley | 2019 |
| Advantage Racing Club Ltd | Abingdon | 2022 |
| Advantage Rugby Academy Ltd | Norwich | 2026 |
| Advantage Rugby CIC | Norfolk | 2023 |
| Advantage SG Ltd | Northampton | 2019 |
| Advantage Sports Coaching Ltd | Beverley | 2012 |
| Advantage Sports Management Limited | Cheltenham | 2015 |
| Advantage Tennis Services Ltd | Exeter | 2023 |
| Advent Motorsport Limited | Pewsey | 1995 |
| Adventura (Leeds) Ltd | Leeds | 2024 |
| Adventure 21 UK Ltd | Bolton | 2024 |
| Adventure Activities Limited | Bridgend | 2003 |
| Adventure Activity Associates Limited | Winchester | 2006 |
| Adventure Attractions Limited | Richmond | 1992 |
| Adventure Basecamp Ltd | Ambleside | 2025 |
| Adventure Beyond Limited | Llandysul | 2001 |
| Adventure Beyond Schools Limited | Llandysul | 2009 |
| Adventure Bike Collective Ltd | Hythe | 2025 |
| Adventure Bike Experience Ltd | Llanidloes | 2018 |
| Adventure Bound South West Limited | Highbridge | 2024 |
| Adventure Breaks Group Limited | Carnforth | 2020 |
| Adventure Builds (Cumbria) Limited | Penrith | 2024 |
| Adventure Catalysts Limited | Liverpool | 2002 |
| Adventure Challenge Events Limited | Poole | 2005 |
| Adventure Challenge Limited | Keswick | 2014 |
| Adventure Cinema Limited | Bishops Castle | 2019 |
| Adventure Connections Limited | Hove | 2007 |
| Adventure Dementia Alzheimer's and Depression CIC | Derby | 2024 |
| Adventure Enterprises Limited | Stoke-On-Trent | 1980 |