| A J V Consultants Limited | Chester | 2020 |
| A J Vehicle Engineers Limited | Forest Row | 2009 |
| A J Watson (Holdings) Ltd | Carnlough | 2019 |
| A J Watson Ltd | Co Antrim | 2006 |
| A J Westlake Ltd | Woking | 2011 |
| A J Wheat Sipp GF2697 Limited | London | 2021 |
| A J Whiddington Ltd | Royston | 2019 |
| A James Investments Limited | Nantwich | 2025 |
| A Jay’S Landscaping & Garden Maintenance Ltd | Coventry | 2025 |
| A Jenkins Administration Services Ltd | Worcester | 2021 |
| A Jenson Properties Limited | Perth | 2016 |
| A JET Adventure Ltd | London | 2025 |
| A Johns Associates Ltd | Pinner | 2017 |
| A Johnson Consulting Limited | York | 2008 |
| A Jones Limited | Stockton On Tees | 2002 |
| A Joy to Work With Ltd | Wimborne | 2024 |
| A K 2005 Limited | Chesterfield | 2013 |
| A K Aero Marine (Scotland) Ltd | Stevenston | 2015 |
| A K Alkins Consultancy Ltd | Wellingborough | 2025 |
| A K Bata & Co. Limited | Edgware | 2003 |
| A K Building Ltd | London | 2021 |
| A K Building Solutions (London) Ltd | London | 2017 |
| A K Cleaning Services Limited | Ilford | 2016 |
| A K E 2024 Ltd | Hoddesdon | 2024 |
| A K Gray Site Services Limited | Lincolnshire | 2006 |
| A K J Associates Limited | London | 1999 |
| A K Lawnscapes Limited | Solihull | 1998 |
| A K M Financial Wealth Ltd | Tamworth | 2013 |
| A K M International Limited | Leicester | 2017 |
| A K P Consultant Services (UK) Limited | Buckhurst Hill | 2019 |
| A K Pendleton Ltd | Watford | 2009 |
| A K Private Elite Security Ltd | London | 2022 |
| A K R M Consultants Limited | Leeds | 2015 |
| A K Rentals Limited | Derby | 2012 |
| A K Seats Garden Design and Maintenance Limited | Rugby | 2001 |
| A Kalsi Ltd | Oldbury | 2022 |
| A Kasper Production Limited | Hastings | 2016 |
| A Kemp Garden Services Limited | Braintree | 2008 |
| A Kennie Roofing Limited | Walsall | 2017 |
| A Kentish Wedding Ltd | Herne Bay | 2014 |
| A Khan Recruitment Ltd | Ilford | 2024 |
| A Kingfisher Moment Ltd | Altrincham | 2018 |
| A Kismet Collective Ltd | London | 2025 |
| A Knight Services Limited | Maidenhead | 2006 |
| A Kothari Ltd | Leicester | 2025 |
| A L B Collections Limited | Enfield | 2020 |
| A L Construction (South East) Ltd | Maidstone | 2004 |
| A L F Plant Ltd | Northampton | 2012 |
| A L Harris Consultancy Ltd | Petworth | 2013 |
| A L Holdings (London) Limited | Wrexham | 2025 |
| A L Human Resources Ltd | Ely | 2018 |
| A L Landscaping Ltd | Rugeley | 2014 |
| A L Leasing & Transport Ltd | Glasgow | 2023 |
| A L M Enforcement & Security Ltd | Romford | 2021 |
| A L Mailing Limited | London | 2010 |
| A L O Car Wash Ltd | Stockport | 2022 |
| A L Secretarial Services Ltd | Orpington | 2012 |
| A LA Carte Landscapes and Paving Limited | Windermere | 2014 |
| A LA Carte Mgmt Limited | King'S Lynn | 2024 |
| A LA Carte Tours and Events Ltd | London | 2022 |
| A Landscape & Garden Design Limited | Enfield | 2020 |
| A Lane Forward Limited | Liverpool | 2021 |
| A Law-Consultant Ltd | London | 2018 |
| A Lawless Agency Ltd | London | 2020 |
| A Leaner Fit Ltd | Brentwood | 2016 |
| A Lewis Landscape & Garden Services Ltd | Abergele | 2024 |
| A Life at Work Ltd | London | 2011 |
| A Lightfoot Security Maintenance Limited | Carlisle | 2004 |
| A Likkle Hand Limited | Poole | 2025 |
| A Line Art Limited | London | 2017 |
| A Line Travel Limited | Chesterfield | 2020 |
| A List Events Limited | Potters Bar | 2010 |
| A Little Bargain Ltd | Rainham | 2019 |
| A Little BIT of HR Limited | Southgate | 2018 |
| A Little Cleaning Company Ltd | Southam | 2024 |
| A Little Furniture Shop Limited | | 2001 |
| A Little Help Cleaning Services Ltd | Macclesfield | 2025 |
| A Little Help for YOU Ltd | Reading | 2026 |
| A Little Help With SJ Ltd | Blackwood | 2024 |
| A Little Life of Play Limited | Manchester | 2014 |
| A Little Peace of Devon Ltd | Kington | 2026 |
| A Little Piece Limited | St Albans | 2007 |
| A Little Social Ltd | Marlborough | 2023 |
| A Live Experience With Ltd | Halifax | 2017 |
| A Living Concept INT. Ltd | London | 2019 |
| A Lkhayal Tourisme ET Exploration Limited | London | 2024 |
| A Lloret Ltd | Rayleigh | 2024 |
| A Lloyd Consulting Services Ltd | Droitwich | 2022 |
| A Locksmiths Ltd | Rotherham | 2018 |
| A Lockwood Limited | Leigh-On-Sea | 2013 |
| A Long Journey Ltd | Egham | 2024 |
| A Lost Weekend Limited | Southampton | 2019 |
| A Lovie Limited | Banff | 2006 |
| A M & Sons Properties Ltd | Birmingham | 2023 |
| A M C Landscapes Ltd | Culcheth | 2008 |
| A M Car Hire Limited | Rochdale | 2008 |
| A M Cater Landscaping Limited | Buckingham | 1997 |
| A M Clarke Ltd | Whitstable | 2017 |
| A M Convenience (Catherine-De-Barnes) Ltd | Birmingham | 2019 |
| A M Convenience (Wythall) Limited | Birmingham | 2015 |