| APF Solutions Ltd | Nottingham | 2024 |
| APF19 Insight Limited | Stafford | 2023 |
| Apfels & Co Limited | Leeds | 2012 |
| Apfen Associates Ltd | Tunbridge Wells | 2012 |
| Apfx Ltd | Horsham | 2015 |
| APG Bookkeeping Limited | Blackburn | 2020 |
| APG Bristol Limited | London | 2022 |
| APG Cornwall Limited | London | 2022 |
| APG Creative Limited | Saltergate | 2023 |
| APG Domestic Services Limited | Preston | 2001 |
| APG Engineering Ltd | Glasgow | 2020 |
| APG Exeter Limited | London | 2022 |
| APG Finance Limited | Sale | 2026 |
| APG Goldev Limited | London | 2023 |
| APG IT Ltd | Glasgow | 2019 |
| APG London Limited | London | 2022 |
| APG Management Limited | London | 2022 |
| APG Partners Ltd | Y Felinheli | 2026 |
| APG Payroll Ltd | Saffron Walden | 2023 |
| APG PI Limited | London | 2022 |
| APG Regional Development Limited | London | 2022 |
| APG Residential Investments Limited | London | 2022 |
| APG Strategic Developments Limited | London | 2022 |
| APG Topco Ltd | Rochester | 2022 |
| APG Wealth Management Ltd | Ware | 2015 |
| APG Worldwide Ltd | England, London | 2022 |
| Apgb Boutique Consultancy Ltd | London | 2021 |
| Apgolf Ltd | Reading | 2017 |
| APH 3G Limited | Basildon | 2006 |
| APH Accountancy Services Limited | Westcliff-On-Sea | 2012 |
| APH Accountants Ltd | Wallasey | 2010 |
| APH Advisory Services Ltd | Potters Bar | 2025 |
| APH Associates Ltd | Witney | 2008 |
| APH Bookkeeping Services Ltd | London | 2010 |
| APH Consultancy Services Ltd | Whitstable | 2020 |
| APH Consulting Limited | Stockport | 2025 |
| APH Contracting Ltd | London | 2025 |
| APH Design Limited | Wrexham | 2024 |
| APH Engineering Consultancy Limited | Birmingham | 2022 |
| APH Engineering Services Limited | Peterborough | 1989 |
| APH Holdings (Scotland) Ltd | Glasgow | 2023 |
| APH Marketing Limited | Sheringham | 2006 |
| APH Mechanical Engineering Services Limited | Swansea | 2026 |
| APH Midlands Limited | Mansfield | 2017 |
| APH Project Management Ltd | Coventry | 2026 |
| APH Utilities Limited | Ellon | 2020 |
| Aph.Media Ltd | Bath | 2026 |
| Aphac Engineering Ltd. | | 2006 |
| Aphaia Limited | London | 2009 |
| Aphaia Management Ltd | London | 2018 |
| Aphari Limited | London | 2015 |
| Apharo Group Ltd | Leicester | 2024 |
| Aphco Limited | Glasgow | 2016 |
| Apheleia Consulting Ltd. | London | 2014 |
| Apheli Health Limited | Swadlincote | 2022 |
| Aphelion Advisory Ltd | London | 2026 |
| Aphelion Agency Ltd | Chester | 2021 |
| Apheresis Consulting Services Limited | Bedford | 2025 |
| Apherion Therapeutics Limited | Cambridge | 2025 |
| Aphes Solutions Ltd | Winchester | 2026 |
| Aphex ADS Ltd | London | 2024 |
| Aphex Financial Planning Ltd | Worthing | 2020 |
| Aphid Limited | London | 2005 |
| Aphiliate Ltd | Stockport | 2023 |
| Aphobos Consulting Ltd | Devizes | 2024 |
| Aphor Limited | Reading | 2022 |
| Aphorus Limited | Ilford | 2024 |
| Aphot Ltd | Henley-On-Thames | 2015 |
| Aphs Herts Ltd | Watford | 2023 |
| Aphthongs Limited | London | 2023 |
| Aphw Associates Limited | London | 2010 |
| Aphyx Ltd | Croydon | 2009 |
| API Accountancy Services Ltd | London | 2017 |
| API Agroindustry Ltd | London | 2015 |
| API Communications Ltd | Exeter | 2003 |
| API Compliance Limited | Borough | 2014 |
| API Consulting (Ceased) Limited | Milton Keynes | 2010 |
| API Developments Limited | Rotherham | 2018 |
| API Engineering (O&G) Ltd | Norwich | 2018 |
| API First Ltd | Wilmslow | 2021 |
| API Holdco Limited | Bristol | 2004 |
| API Holdings Limited | Norwich | 2014 |
| API Norwich Ltd | Norwich | 2017 |
| API Overseas Holdings Limited | Poynton | 1998 |
| API Particle Development Limited | London | 2020 |
| API Partnership Limited | London | 2005 |
| API Photographic Services Limited | Oxford | 2003 |
| API Robotics Engineering Limited | Basingstoke | 2025 |
| API Social Network Ltd | Leeds | 2024 |
| API Stone Limited | Norwich | 2010 |
| API Technical Services Limited | Worthing | 2005 |
| API Technologies (UK) Limited | Great Yarmouth | 2012 |
| Api-Slender Limited | Estate, Pocklington, York | 1981 |
| Apia Consultancy Ltd | London | 2016 |
| Apiana Partners Limited | Horwich, Bolton | 2025 |
| Apiary Bookkeeping Ltd | Crawley | 2012 |
| Apib Investments Limited | Surbiton | 2022 |
| Apical Consulting Limited | Guildford | 2010 |
| Apical Dominance Limited | Belper | 2015 |
| Apical Impact Ltd | London | 2026 |