| Adraga Consulting Limited | Farnham | 2022 |
| Adrageous Media Limited | Brighton | 2025 |
| Adrah Ltd | Eastbourne | 2022 |
| Adrah Studios Ltd | Wellingborough | 2020 |
| Adraix Ltd | Mitcham | 2026 |
| Adraktas Consulting Ltd | Norwich | 2023 |
| Adran Ltd | Leeds | 2014 |
| Adrapana Limited | Cardiff | 2026 |
| Adrara Limited | Wimborne | 2024 |
| Adrastea Limited | Newcastle Upon Tyne | 2012 |
| Adrastea Services Ltd | London | 2023 |
| Adrastone Limited | Godalming | 2023 |
| Adrastos Business Support Limited | Bridgend | 2018 |
| Adrastos Limited | London | 2010 |
| Adrat Consults Limited | Harlow | 2022 |
| Adrawings Ltd | Coventry | 2021 |
| Adrd Consultancy Limited | Birmingham | 2024 |
| Adrd Investments Limited | Warrington | 2018 |
| Adref Heating & Renewables Limited | Cardigan | 2020 |
| Adregen Ltd | Hove | 2025 |
| Adrem Accounting Ltd | Congleton | 2006 |
| Adrem Business Solutions Ltd. | Motherwell | 2007 |
| Adrem Careers Limited | London | 2017 |
| Adrem Consulting Limited | Glasgow | 1998 |
| Adrem Development Ltd | Harrogate | 2023 |
| Adrem Enterprises Limited | Leicester | 2006 |
| Adrem People Development Limited | Harrogate | 2010 |
| Adrem Technology Limited | Aberdeen | 2009 |
| Adremedica British Research & Engineering Group Ltd. | London | 2015 |
| Adrems Consult Limited | Belvedere | 2017 |
| Adrena Austin Ltd | Rickmansworth | 2019 |
| Adrenalin Advertising Limited | London | 2000 |
| Adrenalin Management Limited | Ilford | 2001 |
| Adrenalin Marketing Ltd | Cardiff | 2009 |
| Adrenaline Advertising Limited | Willerby | 2007 |
| Adrenaline Costumes Limited | Glasgow | 2019 |
| Adrene Ltd | London | 2025 |
| Adres Patent International Ltd | London | 2017 |
| Adrestia Capital Partners Limited | Edinburgh | 2017 |
| Adrestia TCC 1 Limited | London | 2017 |
| Adrestria Projects Ltd | Aberdeen | 2020 |
| Adret Holdings Limited | Farnham | 2026 |
| Adrhealth Ltd | Cheadle | 2021 |
| Adria Exclusive Ltd | Potters Bar | 2014 |
| Adria Group Limited | Aberdeen | 2008 |
| Adria Solutions Limited | Stockport | 2004 |
| Adrian & Co Limited | London | 2012 |
| Adrian & Goran Limited | Woodford Green | 2007 |
| Adrian Artworks Ltd | Letchworth Garden City | 2018 |
| Adrian Biles-Wood Architects Ltd | Bradford-On-Avon | 2025 |
| Adrian Borton Services Ltd | Altrincham | 2019 |
| Adrian Bouch Consulting Ltd | Hants | 2019 |
| Adrian Brooks Limited | Warmley | 2009 |
| Adrian Brown Training Limited | Saffron Walden | 2012 |
| Adrian Buckley IIP Settlement 2003 Limited | Manchester | 2003 |
| Adrian Bush Limited | Arundel | 2013 |
| Adrian C Mansbridge & Company Ltd | Northwood | 2014 |
| Adrian Charsley Associates Limited | Lymington | 2020 |
| Adrian Clarke Associates Ltd | Harpenden | 2008 |
| Adrian Clarke Media Ltd. | London | 2012 |
| Adrian Cole Frics Limited | Tring | 1999 |
| Adrian Cole Sales Consultancy Ltd | West Malling | 2016 |
| Adrian Cook Architects Ltd | Crickhowell | 2024 |
| Adrian Cope Project Management Limited | Preston | 2009 |
| Adrian Curtis Limited | Pontyclun | 2017 |
| Adrian Davis & Associates Limited | Rugby | 2012 |
| Adrian Day Advisers Limited | Tunbridge Wells | 2010 |
| Adrian Dews Ltd | Mildenhall | 2025 |
| Adrian Digby Ltd | Swindon | 2023 |
| Adrian Foggett Limited | Witney | 2025 |
| Adrian Glasser Consulting Ltd | Whitby | 2021 |
| Adrian Goodall Associates Limited | Wiltshire | 2001 |
| Adrian Gould Mrtpi Ltd | Oxford | 2011 |
| Adrian Grant Productions Limited | London | 2025 |
| Adrian Green Design Ltd | Covent Garden | 2011 |
| Adrian Green Photography Limited | Woodbridge | 2007 |
| Adrian Gurr Surveys Ltd | Hailsham | 2015 |
| Adrian Hall Chartered Accountants Limited | Bangor | 2016 |
| Adrian Hancox Limited | Dorking | 2014 |
| Adrian Hare Consultants Limited | Christchurch | 2017 |
| Adrian Heapy Photography Ltd | Belper | 2010 |
| Adrian Hill Architects Ltd | London | 2020 |
| Adrian Hodges Advisory Limited | Harpenden | 2012 |
| Adrian Houston Limited | Rickmansworth | 2005 |
| Adrian Howells Consulting Ltd | Woodbridge | 2025 |
| Adrian ISO Solutions Ltd | Newport | 2026 |
| Adrian J Singleton Limited | Grays | 2012 |
| Adrian J Wright Consulting Ltd | St. Albans | 2015 |
| Adrian Jackson Consulting Limited | Sutton | 2024 |
| Adrian James Acoustics Limited | Norwich | 2002 |
| Adrian James Architects Limited | Oxford | 2003 |
| Adrian James Jones Landscape Consultant Limited | Stoke-On-Trent | 2015 |
| Adrian James Nutrition Ltd | High Wycombe | 2011 |
| Adrian Jeremiah Consulting Limited | Swansea | 2016 |
| Adrian Johnson Limited | Otley | 2012 |
| Adrian Jones Associates Limited | Dorchester | 2010 |
| Adrian Jones Consultancy Limited | Salisbury | 2009 |
| Adrian Kettle Limited | Solihull | 2013 |
| Adrian Koenig Ltd | Brighton | 2020 |
| Adrian Lambert Photography Limited | Glossop | 2012 |