| A P James Ltd | London | 2016 |
| A P Kyte Ltd | Stockport | 2025 |
| A P L Engineering Services Limited | Wisbech | 2024 |
| A P L Management Ltd | Retford | 2010 |
| A P Land Surveys Limited | Ottery St Mary | 2009 |
| A P Lawson Engineering Ltd | Lincoln | 2024 |
| A P M Design Ltd | Darwen | 2002 |
| A P M Hydraulics Limited | Ampthill | 2015 |
| A P Morgan Financial Services Ltd | Bristol | 2019 |
| A P N Pinfold & Co Limited | Woodbridge | 1996 |
| A P Newman Limited | Biggleswade | 2012 |
| A P Paver Hire Limited | Uttoxeter | 1977 |
| A P Preston Consulting Limited | Huddersfield | 2025 |
| A P Racing Pension Trustees Limited | | 2001 |
| A P Ripley & Co Limited | Mirfield | 2013 |
| A P Sherlock Associates Limited | Burgess Hill | 2020 |
| A P Smith & Co. Limited | Purley | 2007 |
| A P Smith Secretarial Services Limited | Purley | 2007 |
| A P Training (NE) Limited | Guisborough | 2022 |
| A P Urban Design Limited | London | 2026 |
| A P Welding Services Ltd. | Manchester | 2015 |
| A P Whiteley Consultants Limited | Milton Keynes | 2002 |
| A P Williamson Consultants Ltd | Romford | 2011 |
| A P Zuokumor Limited | Wilmslow | 2012 |
| A Pariente Consulting Limited | Wimborne | 2013 |
| A Parker Advisory Ltd | London | 2025 |
| A Parker Consulting Limited | Harrogate | 2026 |
| A Parr Biodiversity Services Ltd | Dawlish | 2026 |
| A Partnership Limited | Llangollen | 2020 |
| A Parton Consultancy Limited | Cardiff | 2013 |
| A Pavlak PTY Ltd | Benfleet | 2026 |
| A Pawsey Limited | Basildon | 2006 |
| A Paxton Engineering Limited | Sutton Coldfield | 2010 |
| A Pearce Limited | London | 2016 |
| A Pearson Ltd | Derby | 2011 |
| A Pegg Investments Limited | Canford Cliffs | 2009 |
| A Personal Invitation Ltd | Ryde | 2009 |
| A Personal Property Solution Ltd | London | 2023 |
| A Phillips & Co. Ltd | Newton Heath | 1996 |
| A Phillips Media Limited | Brentwood | 2024 |
| A Photiou Marketing Ltd | Barnet | 2024 |
| A Photographer Ltd | Harrow | 2018 |
| A Picture of Health Ltd | Keighley | 2023 |
| A Piller-Roner Limited | London | 2017 |
| A Pinch of Salt Limited | Huntingdon | 2000 |
| A Piranie Limited | Leicester | 2020 |
| A Pirvulescu Ltd | London | 2016 |
| A Place Beyond Ltd. | Otley | 2001 |
| A Place for Nature Ltd | Mildenhall | 2025 |
| A Place in Childhood CIC | Edinburgh | 2022 |
| A Place to Heal Limited | Wells | 2018 |
| A Plan Architectural Design Limited | Coventry | 2008 |
| A Plan Solutions Ltd | Ilford | 2012 |
| A Plastic Free Planet UK Limited | London | 2019 |
| A Platform Limited | Haddington | 2022 |
| A Plus + Limited | Colchester | 1999 |
| A Plus a Digital Ltd | Coalville | 2022 |
| A Plus Accountancy & Business Solutions Limited | Wellington | 2010 |
| A Plus Accounting & Bookkeeping Ltd | Reading | 2018 |
| A Plus Accounting Services Limited | Grays | 2006 |
| A Plus Consultancy Limited | Reigate | 2009 |
| A Plus Consulting Ltd | London | 2013 |
| A Plus E Consultancy Ltd | London | 2021 |
| A Plus Enviromaint Ltd | Bristol | 2024 |
| A Plus GAS Services Ltd | Peterlee | 2021 |
| A Plus Interiors Ltd | Leeds | 2026 |
| A Plus K Architecture Ltd | London | 2025 |
| A Plus Learning & Immigration Ltd | Birmingham | 2025 |
| A Plus London Ltd | London | 2025 |
| A Plus Mens Coaching and Development Ltd | Bristol | 2024 |
| A Plus Resourcing Limited | Manchester | 2009 |
| A Plus Training (Midlands) Limited | Staffordshire | 2008 |
| A Pocketful of Wisdom Limited | Ellon | 2023 |
| A Potts Design Ltd | Pontypridd | 2021 |
| A Powell Consultancy Limited | Derby | 2015 |
| A Practice for Everyday Life Limited | London | 2010 |
| A Price Consulting Limited | Chester | 2017 |
| A Pridham Coaching & Consulting Limited | Tring | 2024 |
| A Priest Solutions Ltd | Norwich | 2011 |
| A Priori Designs Limited | Edinburgh | 2004 |
| A Priori Projects Ltd | London | 2024 |
| A Privacy Differential Company Ltd | Swansea | 2024 |
| A Proper Adventure Ltd | Gravesend | 2025 |
| A Proper Agency Ltd | Clitheroe | 2013 |
| A Pure Company Ltd | Nottingham | 2009 |
| A Puri Limited | Manchester | 2008 |
| A Q Chem Limited | Coulsdon | 2022 |
| A Q Morgan Limited | Haverhill | 2011 |
| A Qlcompany Ltd | Banbury | 2015 |
| A Quantrill Ltd | Leigh-On-Sea | 2025 |
| A QUE Ltd | Sheffield | 2015 |
| A Quiet Space Ltd | London | 2021 |
| A Quinn Consultants Ltd | Liverpool | 2026 |
| A R Accounts Ltd | London | 2026 |
| A R Assets International Ltd | Hounslow | 2020 |
| A R B Accountants Limited | London | 2009 |
| A R Bennett Limited | Keighley | 2001 |
| A R Benson (Rochford) Limited | Essex | 1993 |
| A R Bird Ltd | Fleet | 2022 |
| A R Brown & Co (Worthing) Limited | Worthing | 2015 |