| Apak Business Management Ltd | London | 2021 |
| Apak Communications and Trade Limited | London | 2002 |
| Apakus Consulting Services Ltd | London | 2024 |
| Apal Limited | Rochester | 2015 |
| Apalc Limited | Stockport | 2017 |
| Apaleis Chemicals Limited | Cardiff | 2009 |
| Apalis Ltd | Alton | 2025 |
| Apalux Ltd | Enfield | 2013 |
| Apam Management Limited | Nottingham | 2023 |
| Apana Business Psychology Limited | Peterborough | 2011 |
| Aparangi Ltd | Edinburgh | 2009 |
| Apardion Consulting Limited | Aberdeen | 2019 |
| Aparey and Co Ltd | Gravesend | 2016 |
| Apargl Ltd | East Grinstead | 2010 |
| Aparito Limited | Wrexham | 2014 |
| Aparna BIO Ltd | London | 2025 |
| Aparo Ltd | Poole | 2017 |
| Aparon Ltd | Tamworth | 2016 |
| Apart Realty Ltd | Edgware | 2021 |
| Aparthotel Investment Solutions Ltd | London | 2023 |
| Apartment 3 Ltd | London | 2016 |
| Apas Management PTE Limited | Huddersfield | 2003 |
| Apas Secure Business Solutions Ltd | London | 2016 |
| Apassessments Limited | Scunthorpe | 2010 |
| Apastudio Ltd | London | 2021 |
| Apater UK Limited | Brentwood | 2019 |
| Apatheia Coaching Limited | London | 2024 |
| Apatite Marketing Ltd | Alnwick | 2026 |
| Apave Aerospace & Defence UK Ltd | Immingham | 2006 |
| Apave TIV UK Ltd | Warrington | 2021 |
| Apave UK Ltd | North East Lincolnshire | 1992 |
| Apax Angel (UK) A1 GP Co Ltd | London | 2006 |
| Apax Angel 1 MLP Co Ltd | London | 2006 |
| Apax Angel a MLP Co Ltd | London | 2006 |
| Apax Europe VI - 1 Nominee Limited | Edinburgh | 2006 |
| Apax Europe VI - a Nominee Limited | Edinburgh | 2006 |
| Apax Limited | Bury St. Edmunds | 2021 |
| Apax Partners Holdings Ltd | London | 1991 |
| Apax Partners Worldwide Holdings Ltd | London | 2003 |
| Apax.Tech Ltd | London | 2024 |
| Apaxa Designs Ltd | London | 2009 |
| Apayh Ltd | London | 2020 |
| Apaz Limited | Burton-On-Trent | 2003 |
| APB Accountants Limited | Ilfracombe | 2010 |
| APB Accounting Services Limited | Lowestoft | 2002 |
| APB Bookkeeping Services Limited | Penrith | 2014 |
| APB CAD Limited | Sheffield | 2008 |
| APB Construction Management Limited | Workington | 2026 |
| APB Consultants Limited | Blackburn | 2018 |
| APB Consulting Ltd | London | 2022 |
| APB Creative Limited | London | 2009 |
| APB Displays Limited | | 1996 |
| APB Ecology Ltd | Herne Bay | 2026 |
| APB Engineering Ltd | Liverpool | 2024 |
| APB GAS Consultancy Limited | Leigh | 2023 |
| APB Law Limited | Colchester | 2015 |
| APB Marine Limited | Colchester | 2009 |
| APB Mortgages Ltd | Durham | 2017 |
| APB Planning Limited | Lincoln | 2015 |
| APB Print Finishing Services Limited | Huddersfield | 2013 |
| APB Professional Services Ltd | Skipton | 2024 |
| APB Specialised Services Ltd | Billinge | 2024 |
| APB Total Health & Safety Services Ltd | South Woodham Ferrers | 2015 |
| APB Training Services Ltd | Horsham | 2021 |
| APB Yacht Surveys Limited | Colchester | 2016 |
| APB1 Ltd | Yaxley, Peterborough | 2025 |
| Apbs OIL and GAS Ltd | Croydon | 2013 |
| APC (DM) Limited | Petworth | 2016 |
| APC 23 Ltd | Aylesbury | 2016 |
| APC Academy Limited | Edinburgh | 2016 |
| APC Accountancy (NE) Limited | York | 2018 |
| APC Accountancy (Staffs) Ltd | Stafford | 2011 |
| APC Accountants Limited | Mansfield | 2007 |
| APC Accounting Limited | Epping | 2019 |
| APC Business Consultancy Ltd | Nottingham | 2024 |
| APC Chemicals Limited | Fareham | 2024 |
| APC Compliance Limited | Ross-On-Wye | 2005 |
| APC Computer Services Limited | Altrincham | 1997 |
| APC Connect Ltd | London | 2022 |
| APC Consult Ltd | Manchester | 2018 |
| APC Consulting Ltd | Leighton Buzzard | 2025 |
| APC Design & Planning Ltd | Souldrop | 2017 |
| APC Europe Limited | London | 2006 |
| APC Futures Ltd | Luton | 2009 |
| APC Installers Limited | Birstall | 2022 |
| APC Johnson Consulting Limited | Wokingham | 2018 |
| APC Law Limited | Derby | 2018 |
| APC Legal Limited | Nottingham | 2026 |
| APC Management Ltd. | Weston-Super-Mare | 2018 |
| APC Mech Tech Ltd | Ulverston | 2023 |
| APC Retail Consultancy Ltd | Frome | 2020 |
| APC Success Limited | Witney | 2010 |
| APC Supply Chain Solutions Ltd | Penzance | 2022 |
| APC Surveyors Limited | Bromley | 2009 |
| APC Technology Group Ltd | Rochester | 1982 |
| Apca Capital Ltd | Brentwood | 2018 |
| Apca Entertainment Ltd | London | 2025 |
| Apca Group Ltd | Plymouth | 2020 |
| Apcal Consulting Ltd | Grays | 2012 |
| Apcintex Limited | Altrincham | 2014 |