| Apical Landscaping Limited | Newmarket | 2018 |
| Apicallity Limited | Sutton | 2015 |
| Apicem Consulting Ltd | Salisbury | 2023 |
| Apicem Salutem Ltd | Brentwood | 2021 |
| Apiceutical Research Centre Limited | Whitby | 2011 |
| Apicius Limited | Altrincham | 2009 |
| Apico (Holdings) Limited | Burnley | 2013 |
| Apidea Ltd | Wigton | 2020 |
| Apidx Limited | Norwich | 2021 |
| Apient Consulting Limited | Sandy | 2003 |
| Apiject Limited | Eastbourne | 2015 |
| Apila Consultancy Limited | London | 2024 |
| Apini Consulting Limited | London | 2023 |
| Apini Therapeutics Limited | Huntingdon | 2021 |
| Apipa Ltd | Darwen | 2020 |
| Apiro UK Limited | Newport Pagnell | 2018 |
| Apis Accounting Limited | Thatcham | 2025 |
| Apis Assay Technologies Ltd. | Manchester | 2018 |
| Apis Consultancy Services Ltd | Liverpool | 2019 |
| Apis Holdings Limited | Stonehouse | 2023 |
| Apis Interim Management Limited | Epsom | 2014 |
| Apisfirst Ltd | Exeter | 2021 |
| Apismeritas (TM) Ltd | Stoke-On-Trent | 2026 |
| Apisr Ltd | London | 2012 |
| Apisrilankan Ltd | Harrow | 2015 |
| Apitech Solutions Ltd | Bolton | 2021 |
| Apitura Innovation Limited | Hitchin | 2024 |
| APJ Accountancy Limited | Edgware | 2011 |
| APJ Commissioning and Project Management Limited | Barrow-In-Furness | 2014 |
| APJ Consultants Limited | London | 2010 |
| APJ Consulting Ltd | Bury | 2022 |
| APJ Energy Ltd | London | 2025 |
| APJ Financial Services Limited | Southend-On-Sea | 2012 |
| APJ Projects Limited | Jarrow | 2018 |
| APJ Services (London) Ltd | Erith | 2018 |
| APJ Ventures Ltd | London | 2022 |
| APJ Webb Limited | Beaconsfield | 2017 |
| Apjc Consultancy Ltd | Uxbridge | 2025 |
| Apjl Ltd | Altrincham | 2015 |
| APK Architecture & Design Ltd | St. Neots | 2020 |
| APK Engineering Services Limited | Chippenham | 2021 |
| APK London Ltd | Bexley | 2023 |
| APK Property Consultants Limited | Woodford Green | 2024 |
| APK Rail Services Ltd | Stockport | 2022 |
| Apkm Accountancy Ltd | Pewsey | 2015 |
| Apkpur Limited | Kenilworth | 2019 |
| APL Accountants (North) Limited | Bolton | 2021 |
| APL Accountants (South) Limited | Hereford | 2021 |
| APL Accountants Limited | Leominster | 2007 |
| APL Advisory Ltd | Borehamwood | 2026 |
| APL Anglesey Limited | London | 2012 |
| APL Business Solutions Limited | Beckenham | 2013 |
| APL Consultancy Limited | Middlesbrough | 2022 |
| APL Food Consultants Limited | Warrington | 2016 |
| APL Group Limited | London | 1928 |
| APL Holdings Limited | Leatherhead | 1990 |
| APL Insights Ltd | London | 2025 |
| APL Instrumentation & Rope Access Ltd | Nottingham | 2015 |
| APL Law Ltd | Birmingham | 2020 |
| APL London Ltd | London | 2022 |
| APL Mechanical Engineering Limited | Wirral | 2025 |
| APL Mechanical Services Limited | Essex | 2015 |
| APL Microsystems Limited | Southport | 2016 |
| APL One Ltd | Malmesbury | 2008 |
| APL Research Ltd | London | 2024 |
| APL Technologies Limited | Ferndown | 2023 |
| Aplace Consulting Limited | Oldham | 2021 |
| Aplc Limited | Brentwood | 2024 |
| Aplc Training Ltd | Ilford | 2010 |
| Aplek Limited | St. Albans | 2020 |
| Aplen Limited | | 1997 |
| Apletree Accountancy Services Ltd | Bognor Regis | 2018 |
| Apleum Technologies Limited | London | 2023 |
| Aplex Global Ltd | London | 2025 |
| Aplex Structures Limited | Bristol | 2024 |
| Apley Estates Company (the) | Shifnal | 1933 |
| Apley UK Limited | Telford | 2021 |
| Aplh Limited | Leeds | 2008 |
| Aplha One Consultants Ltd | Manchester | 2025 |
| Aplin Accountancy Ltd | Kidlington | 2016 |
| Aplin Associates Ltd | London | 2023 |
| Aplin Communications Limited | Brecon | 2026 |
| Aplin Consultancy Ltd | Stevenage | 2017 |
| Aplin Dynamics Ltd | Sevenoaks | 2018 |
| Aplingo Ltd | Bristol | 2011 |
| Aplo Finance Ltd | Preston | 2026 |
| Aplomado Limited | Warrington | 2016 |
| Aplomb & Co. UK Limited | London | 2021 |
| Aplomb Decisions Ltd | London | 2022 |
| Aplomb+Brio Limited | Wetherby | 2019 |
| Aplts Limited | Hull | 2018 |
| Aplus Accountancy and Financial Solutions Ltd | Wallington | 2025 |
| Aplus Accountancy Limited | Welling | 2018 |
| Aplus Bidco Limited | London | 2016 |
| Aplus Holdco Limited | London | 2016 |
| Aplus INT Solution Ltd | London | 2021 |
| Aplus Learning Solutions Limited | Middlesbrough | 2024 |
| Aplus Structures Ltd | Stoke-On-Trent | 2022 |
| Aplus Subc Limited | Buckinghamshire | 2018 |
| Aplus Topco Limited | London | 2016 |