| A Morris Consulting Ltd | Dunstable | 2025 |
| A Morris Design and Art Direction Limited | Hythe | 2016 |
| A Morrissey & Associates Limited | Brentwood | 2021 |
| A Morton Accountants (Bridgnorth) Ltd | Ludlow | 2016 |
| A Morton Accountants (Church Stretton) Ltd | Church Stretton | 2024 |
| A Morton Accountants Limited | Ludlow | 2006 |
| A Morton Financial Planning Ltd | Chesterfield | 2020 |
| A Most Unlikely Builder Limited | London | 2022 |
| A Movement of Humans Ltd | Beaconsfield | 2025 |
| A Mullins Consultancy Ltd | Birmingham | 2025 |
| A Mummy TOO Ltd | London | 2017 |
| A Murfin Consulting Ltd | Witney | 2024 |
| A Murphy Consulting Ltd | Wirral | 2023 |
| A N a Company Services Limited | London | 2009 |
| A N Advance Solutions Ltd | London | 2025 |
| A N Agarwal Limited | Greenford | 2020 |
| A N Architectural Design and Consulting Engineers Ltd | Preston | 2003 |
| A N Barr Industries Limited | Exeter | 2010 |
| A N Cabanas Limited | Sidcup | 2011 |
| A N Consultancy (NW) Limited | St Asaph | 2015 |
| A N Consulting International Ltd | Launceston | 2018 |
| A N COX Design Limited | Manchester | 2017 |
| A N D Solutions Limited | Birmingham | 2015 |
| A N Draper Limited | Salisbury | 2012 |
| A N Fashion Design Limited | London | 2018 |
| A N Ford Surveyors Limited | London | 2012 |
| A N G Consulting Limited | Aberdeen | 1996 |
| A N G Linden Limited | Great Horwood | 2009 |
| A N H Consultants Ltd | Leicester | 2018 |
| A N Heys Consulting Limited | Keighley | 2023 |
| A N Information Limited | Pewsey | 2011 |
| A N K Print Limited | Edgware | 2014 |
| A N L Limited | Cirencester | 1997 |
| A N Legal Property and Investments Ltd | Leeds | 2023 |
| A N R Accountants Limited | Bushey | 2014 |
| A Nagesh Limited | Colchester | 2018 |
| A Neill Consulting Limited | Wimborne | 2019 |
| A Nevill Ltd | Harlow | 2024 |
| A New Day Interior Design Studio Limited | London | 2017 |
| A New Delivery Company Ltd | Newmarket | 2025 |
| A New Design Studio Limited | London | 2020 |
| A New Height Ltd | Leighton Buzzard | 2020 |
| A New Kind Ltd | London | 2023 |
| A New Leaf Consultancy Limited | Broxbourne | 2008 |
| A New Level Limited | London | 2020 |
| A New Life Abroad International Ltd | London | 2003 |
| A New Mark Ltd | Brighton | 2025 |
| A New Narrative Limited | London | 2016 |
| A New Normal Ltd | Haslemere | 2018 |
| A New Perspective Limited | | 1999 |
| A Newman Limited | Teddington | 2020 |
| A Next Wave Media Ltd | London | 2025 |
| A Nightingale Ltd | London | 2024 |
| A Nimoni Limited | Southend-On-Sea | 2015 |
| A Nita Print Limited | West Midlands | 1992 |
| A Noble Writer Ltd | London | 2018 |
| A Nomadic Abode Limited | London | 2017 |
| A Norris Consultancy Ltd | Liverpool | 2026 |
| A Number Crunched Accountancy Limited | Ivybridge | 2009 |
| A O Aviation Limited | Liverpool | 2016 |
| A O Management Consults Limited | Dagenham | 2026 |
| A O Pharma Services Ltd | Bourne | 2022 |
| A O Safety Ltd | Waltham Abbey | 2025 |
| A O Samuel Limited | Berks | 2007 |
| A O'Neill Ltd | Darlington | 2018 |
| A One Contracts Ltd | Glasgow | 2017 |
| A One Design Studio Limited | Birmingham | 2018 |
| A One Management Services Limited | Hounslow West | 2012 |
| A One Opinions Ltd | London | 2025 |
| A Owens Consulting Limited | Holmfirth | 2016 |
| A P & Associates Limited | Middlesex | 1997 |
| A P & B Solutions Ltd | Croydon | 2016 |
| A P & Partners Legal Advice and Consultancy Ltd | Chatham | 2026 |
| A P & Partners Legal Advice Ltd | Chatham | 2026 |
| A P a Planning Services Limited | Surrey | 1998 |
| A P Accounting & Business Solutions Limited | Bourne End | 2014 |
| A P Architects Ltd | Birmingham | 2020 |
| A P Assets (London) Limited | South Croydon | 2013 |
| A P B Inspection Limited | Redcar | 2020 |
| A P B S Ltd | Leicestershire | 2003 |
| A P Bellis & Associates Limited | Blackburn | 1999 |
| A P Bloomberg Limited | Preston | 2018 |
| A P Bookkeeping Ltd | Harrow | 2015 |
| A P Building Design (Commercial) Limited | Chesterfield | 2015 |
| A P Building Design Limited | Chesterfield | 2013 |
| A P Business Solutions Ltd | Bradford | 2014 |
| A P Consultant Services Ltd | Wirral | 2024 |
| A P D Group Holdings Limited | Huddersfield | 2019 |
| A P D Holdings Limited | Huddersfield | 2016 |
| A P Digital Solutions Ltd | London | 2024 |
| A P DRY Cleaners Limited | London | 2015 |
| A P Electrical (Hull) Limited | Beverley | 2003 |
| A P Films Limited | London | 2023 |
| A P Galvin Services Ltd | Ware | 2017 |
| A P Garage Services Limited | Surrey | 2003 |
| A P Gathercole Consulting Ltd | Windsor | 2017 |
| A P Helps Marketing Ltd | Slough | 2026 |
| A P Investments (Ravenshead) Limited | Leicester | 2009 |
| A P J Accounting & Commercial Support Service Ltd | Sunderland | 2012 |
| A P J Supplements Co Ltd | Bishop'S Stortford | 1998 |