| Adrian Lawrence Photography Limited | London | 2016 |
| Adrian LEE Consulting Limited | Winchester | 2024 |
| Adrian Little DIP WCF Limited | Petersfield | 2005 |
| Adrian Loader Limited | London | 2008 |
| Adrian Logan Limited | Bath | 2013 |
| Adrian Mackay Limited | Beaconsfield | 2010 |
| Adrian Maiden Consulting Services Limited | Wigan | 2013 |
| Adrian Markey Ltd | Newry | 2016 |
| Adrian Mason Limited | Radstock | 2009 |
| Adrian Mitchell Creative Services Ltd | Witham | 2025 |
| Adrian Moore Surveying Limited | Eastleigh | 2014 |
| Adrian Moorhouse Organisation Ltd | Camberley | 2026 |
| Adrian Mooy & Co Limited | Derby | 2006 |
| Adrian Morrow Architects Limited | Brackley | 2011 |
| Adrian Mortram Associates Limited | Norwich | 1985 |
| Adrian Nicolle & Co. Limited | Salisbury | 1995 |
| Adrian Patterson Accountancy Ltd | | 2005 |
| Adrian Pearce Baker Ltd | Wotton-Under-Edge | 2016 |
| Adrian Phillips Land Ltd | Brentwood | 2026 |
| Adrian Powell Creative Limited | Haywards Heath | 2025 |
| Adrian Pritchard Consultancy Ltd | Stowmarket | 2023 |
| Adrian Randle Limited | Ottery St. Mary | 2011 |
| Adrian RAY Photography Limited | Wetherby | 2010 |
| Adrian Rees Consulting Ltd | Bradford | 2021 |
| Adrian Robert Knight Ltd | Bristol City | 2024 |
| Adrian Roche Limited | St Albans | 2009 |
| Adrian Rowley Consultancy Limited | Altrincham | 2016 |
| Adrian Rush Limited | Felixstowe | 2015 |
| Adrian Salisbury Training Limited | Northampton | 2020 |
| Adrian Salt and Pang Limited | Leyton | 1997 |
| Adrian Smith Accountants Limited | Norwich | 2003 |
| Adrian Stannard Ltd | London | 2024 |
| Adrian Stewart Davies Limited | Deeside | 2017 |
| Adrian Stickland Limited | Birmingham | 2005 |
| Adrian Stimpson Associates Ltd. | Bingham | 1986 |
| Adrian Surveys Ltd | Coventry | 2018 |
| Adrian Talpade Ltd | Carshalton | 2004 |
| Adrian Thomas Building Control Limited | Sheerness | 2008 |
| Adrian Thompson Consulting Limited | Gateford | 2016 |
| Adrian Thompson Limited | Stoke-On-Trent | 2002 |
| Adrian Tinsley Ltd | London | 2025 |
| Adrian Trading Ltd | London | 2009 |
| Adrian Troop Limited | London | 2013 |
| Adrian Verrin Electrical Ltd | Plymouth | 2017 |
| Adrian Wade Consulting Services Limited | Norwich | 2018 |
| Adrian Waite (Independent Consultancy Services) Limited | Kirkby Stephen | 1999 |
| Adrian Wallace & Co Limited | Hertfordshire | 2022 |
| Adrian Wallbank Legal Services Limited | Warrington | 2021 |
| Adrian Walsh Financial Consulting Limited | Leatherhead | 2009 |
| Adrian Wheale Consultancy Ltd | Bristol | 2021 |
| Adrian Wheeler & Co. Limited | Weybridge | 1976 |
| Adrian Wills Limited | Melton Mowbray | 2010 |
| Adrian Wood VAT Consultancy Limited | Strathaven | 2013 |
| Adriana Delle-Case Ltd | Cardiff | 2019 |
| Adriana Soares Limited | London | 2015 |
| Adrianasaintee Ltd | Colchester | 2025 |
| Adrianic Limited | Craven Arms | 2002 |
| Adrianjknight Limited | Worksop | 2015 |
| Adrianne Carter Ltd | Lichfield | 2019 |
| Adrianne Haynes-Samuel Ltd | Northampton | 2025 |
| Adriano Maio Consulting Ltd | Oldbury | 2024 |
| Adriano Mobile Device Management (Amdm) Limited | Thornton Heath | 2022 |
| Adriano Properties Ltd | Thornton Heath | 2014 |
| Adrians Holdings Ltd | Chelmsford | 2020 |
| Adriatic Consulting Limited | Orpington | 2016 |
| Adriawildlife Tours Limited | Sherborne | 2019 |
| Adric Watson Cinematographer Limited | Bournemouth | 2023 |
| Adrider Ltd | London | 2026 |
| Adrien Raphoz Ltd | Beckenham | 2024 |
| Adrienne Kelbie Coaching Ltd | Wirral | 2022 |
| Adrienne Lamb Design Studio Ltd | London | 2021 |
| Adrienne LAU Projects Ltd | London | 2025 |
| Adrienne Photography Limited | Eastleigh | 2011 |
| Adrienne Sanders Consultancy Ltd | London | 2022 |
| Adrienne Star Design Ltd | Croydon | 2014 |
| Adriginal Ltd | Knutsford | 2014 |
| Adriot Accountants Ltd | Uxbridge | 2012 |
| Adritabaidyamarketing Ltd | London | 2025 |
| Adrivia Ltd | Rehill | 2013 |
| Adrk Limited | Berks | 1990 |
| Adrm Consulting Ltd | Lewes | 2024 |
| Adrm Holdings Limited | Solihull | 2021 |
| Adroi Marketing Ltd | London | 2013 |
| Adroit Accountancy Ltd | London | 2016 |
| Adroit Accountants and Contracts Ltd | Droitwich | 2013 |
| Adroit Accountants Group Ltd | London | 2023 |
| Adroit Accountants Limited | Ipswich | 2018 |
| Adroit Accountax Limited | London | 2008 |
| Adroit AID Ltd | London | 2021 |
| Adroit Aide Ltd | Loscoe | 2018 |
| Adroit Auditing Limited | London | 2025 |
| Adroit Bids Ltd | London | 2023 |
| Adroit Bookkeeping and Consultancy Ltd | London | 2021 |
| Adroit Business Consultancy Limited | Luton | 2020 |
| Adroit Business Consultants Limited | London | 2014 |
| Adroit Business Limited | Hatch End | 2016 |
| Adroit Capital Services Ltd | Eltham | 2024 |
| Adroit Communications Ltd | London | 2024 |
| Adroit Consultancy Limited | Manchester | 2020 |
| Adroit Consultation 2 Limited | Milton Keynes | 2012 |