| Apeldale Limited | Tunbridge Wells | 1947 |
| APERCUS1 Limited | Liverpool | 2023 |
| Apero Social Ltd | Manchester | 2025 |
| Aperture Science Ltd | Frome | 2013 |
| Apetrop Limited | Horsham | 2013 |
| Apew and Scotford MOT & Repairs Limited | Bristol | 2006 |
| Apex 1 Security Limited | Pevensey Bay | 2017 |
| Apex Accountants & Tax Consultants Ltd | Heckmondwike | 2018 |
| Apex Agility Limited | Aberdeen | 2012 |
| Apex Car Rental UK Limited | Epsom | 2006 |
| Apex Cargo Ltd | Leicester | 2022 |
| Apex Charlie Ltd | Newmarket | 2017 |
| Apex Contract Services Limited | Manchester | 2021 |
| Apex Conveyor Belting Limited | Bury St Edmunds | 1985 |
| Apex Corporate Limited | Middlesex | 2006 |
| Apex Cranes and Service Limited | Brierley Hill | 1985 |
| Apex Dynamics UK Limited | Uttoxeter | 2018 |
| Apex Eco Exporters UK Ltd | London | 2024 |
| Apex Edge Consulting Company Ltd | Manchester | 2026 |
| Apex Electronics & Services Ltd | London | 2023 |
| Apex Enforcement Services Limited | Nottingham | 2003 |
| Apex Estate Group Ltd | Glasgow | 2026 |
| Apex for International Services Limited | Manchester | 2026 |
| Apex for International Trading & Services Limited | Manchester | 2026 |
| Apex for International Trading Limited | Manchester | 2026 |
| Apex for Trading & Services Limited | Manchester | 2026 |
| Apex General Trading Ltd | Manchester | 2026 |
| Apex Group Management Services Limited | Peterborough | 2024 |
| Apex Gutter & Drainage Limited | Kettering | 1990 |
| Apex Harbour Ltd | Milton Keynes | 2024 |
| Apex International Limited | Retford | 2015 |
| Apex Investment Group (ST Paul) Ltd | Birmingham | 2016 |
| Apex Meds Ltd | Coventry | 2023 |
| Apex Motorsport Management Limited | Bledlow | 2008 |
| Apex Norge Limited | London | 2014 |
| Apex OIL & GAS Limited | London | 2012 |
| Apex Organisation Limited | Retford | 2018 |
| Apex Payroll Solutions Limited | Wirral | 2019 |
| Apex Plant Hire Limited | Lutterworth | 2015 |
| Apex Properties NE Ltd | Gateshead | 2016 |
| Apex Property Limited | Newcastle Under Lyme | 2015 |
| Apex Refurbishment Ltd | Caerphilly | 2023 |
| Apex Roofing Contracts Ltd | Edinburgh | 2010 |
| Apex Scaffolding (South West) Ltd | Exeter | 2011 |
| Apex Security Furniture Limited | Biggleswade | 2003 |
| Apex Signals Ltd | Birmingham | 2014 |
| Apex Signs Limited | Norwich | 2012 |
| Apex Siteworks Ltd | Doncaster | 2026 |
| Apex Steeplejacks Limited | Glasgow | 2002 |
| Apex Tattoo Care Ltd | Newport | 2023 |
| Apex Technical Training Limited | Caernarfon | 2019 |
| Apex-Link Enterprise Ltd | Telford | 2026 |
| Apexadd Ltd | London | 2024 |
| Apexarc Logistics Ltd | London | 2026 |
| Apexascent Productions Ltd | London | 2025 |
| Apexascent Sports Ltd | Ipswich | 2026 |
| Apexcedar Limited | Liverpool | 2005 |
| Apexchase Property Management Limited | Borehamwood | 2005 |
| Apexcrown Financial Services Ltd | London | 2026 |
| Apexharbor Constructions Ltd | Edinburgh | 2026 |
| Apexlife Healthcare Ltd | London | 2025 |
| Apexnova Global Trading Ltd | Manchester | 2025 |
| Apexstream Systems Ltd | Edinburgh | 2025 |
| Apexworks Engineering Consultants Ltd | Doncaster | 2015 |
| Apexx Training Limited | Fort William | 2023 |
| Apeza Ltd | Hounslow | 2023 |
| APF Developments Limited | Stratford-Upon-Avon | 2016 |
| APF1960 Consulting Ltd | Rothwell | 2011 |
| Apff Limited | London | 2019 |
| APG Automotive Ltd | Huddersfield | 2014 |
| APG Bombay Street Investments Limited | London | 2025 |
| APG Bombay Street Limited | London | 2025 |
| APG Displays Limited | Congleton | 2013 |
| APG Green Park (Phase 1) Developments Limited | London | 2025 |
| APG Green Park (Phase 1) Investments Limited | London | 2025 |
| APG Green Park (Phase 2) Developments Limited | London | 2025 |
| APG Green Park (Phase 2) Investments Limited | London | 2025 |
| APG Green Park Group Limited | London | 2025 |
| APG HIT Limited | London | 2024 |
| APG Leisure Limited | Congleton | 2013 |
| APG Limited | Kidderminster | 1986 |
| APG MBO Limited | London | 2026 |
| APG Partnerships Limited | London | 2018 |
| APG Projects Limited | London | 2024 |
| APG Securities Limited | London | 2024 |
| APG Somerset House Limited | London | 2024 |
| APG Special Projects NO.1 Limited | London | 2024 |
| APG Strategic Land Limited | London | 2025 |
| APG SW Construction Group Limited | London | 2024 |
| APH Animal Health Laboratory Limited | London | 2005 |
| APH10 Financial Services Limited | Haddington | 2016 |
| Aphctrk Ltd | London | 2018 |
| Aphrodite Hair Products Limited | Hoddesdon | 1991 |
| Aphrodite's Theory Co., Ltd | London | 2017 |
| API Beach Road Investments Limited | London | 2024 |
| API Campus Building Investments Limited | London | 2025 |
| API Cognition Ltd | Norwich | 2021 |
| API Consulting Limited | Nottingham | 2025 |
| API Crantock Beach Investments Limited | London | 2024 |
| API Fusion Technologies Ltd | Norwich | 2018 |