| Apex Hotels (London 3) Limited | Hospitality | 2008 |
| Apex Hotels Limited | Hospitality | 1980 |
| Apex Import/Export L.P. | | 2011 |
| Apex Mindset Consulting Ltd | Health & social care | 2024 |
| Apex Mortgage Advice Limited | Financial services | 2012 |
| Apex Property Care Limited | Construction | 1985 |
| Apex Roofing Contracts Ltd | Extraterritorial | 2010 |
| Apex Sales L.P. | | 2012 |
| Apex Scotland | Health & social care | 1990 |
| Apex Signs Scotland Ltd. | Administrative & support | 2004 |
| Apex Universal L.P. | | 2014 |
| Apex Urban Limited | Energy | 2024 |
| Apex Wellness Ltd | Wholesale & retail | 2024 |
| Apexharbor Constructions Ltd | Extraterritorial | 2026 |
| Apexia Services LP | | 2015 |
| Apexpulse Ltd | Real estate | 2025 |
| Apexstream Systems Ltd | Extraterritorial | 2025 |
| APF International Forest Machinery Exhibition Ltd. | Agriculture & fishing | 2002 |
| Apfase LP | | 2014 |
| Aphelion Industries Limited | Manufacturing | 2020 |
| Aphinitee Limited | Information & communication | 2017 |
| Aphro Investments Limited | Other services | 2018 |
| API Transfer Technologies Ltd | Manufacturing | 2020 |
| Apiary Capital Partners I Founder Partner LP | | 2017 |
| Apiary Capital Partners I GP LLP | | 2017 |
| Apiary Capital Partners II Founder Partner LP | | 2022 |
| Apiary Capital Partners II GP LLP | | 2022 |
| Apiary Investments Holdings Limited | Administrative & support | 2012 |
| Apidae Properties Ltd | Real estate | 2023 |
| Apis Founder GP II LLP | | 2018 |
| Apis Founder II LP | | 2018 |
| Apis GP I Limited | Administrative & support | 2014 |
| Apis GP II Limited | Administrative & support | 2014 |
| Apis GP III Limited | Administrative & support | 2018 |
| Apis GP IV Limited | Administrative & support | 2018 |
| Apis GP LLP | | 2014 |
| Apis Group LP | | 2018 |
| Apis Growth I GP L.P. | | 2014 |
| Apivoryn Guide Structures Ltd | Information & communication | 2026 |
| APL Plus LP | | 2017 |
| Aplera Labs Ltd | Information & communication | 2026 |
| Apleton Holdings LP | | 2021 |
| Apleton Services LP | | 2012 |
| Aplo Svcs Ltd | Administrative & support | 2024 |
| Aplusr Limited | Real estate | 2024 |
| Aplusugc Ltd | Professional & scientific | 2022 |
| APM Lettings Limited | Real estate | 2014 |
| Apmcg GI Limited | Health & social care | 2024 |
| APO (CUT) Ltd | Wholesale & retail | 2016 |
| Apollo Business Corporation L.P. | | 2015 |
| Apollo Business Services L.P. | | 2008 |
| Apollo Global L.P. | | 2011 |
| Apollo Informal Investments Limited | Professional & scientific | 2013 |
| Apollo Power Partners ABR Industries Limited | Water & waste | 2022 |
| Apollo Power Partners Group Holding Ltd | Water & waste | 2022 |
| Apollo Power Partners R & D Labs Limited | Water & waste | 2022 |
| Apolonia Trading LP | | 2017 |
| App 2024 Ltd | Hospitality | 2024 |
| App AI Studios Ltd | Information & communication | 2025 |
| App Buro LP | | 2016 |
| App Corporation Ltd | Real estate | 2005 |
| App International LP | | 2016 |
| App Planet LP | | 2015 |
| Appaloosa Geoconsultants Limited | Professional & scientific | 1999 |
| Apparel Logistics Corporation LP | | 2011 |
| Apparelafterglow Ltd | Wholesale & retail | 2024 |
| Appbooster LP | | 2015 |
| Appcom Development LP | | 2014 |
| Appeltek LP | | 2016 |
| Appetite Cooking Ltd | Information & communication | 2020 |
| Appgantry Ltd | Information & communication | 2026 |
| Appia SCA Blocker LP | | 2011 |
| Appia SCS Blocker LP | | 2011 |
| Appiah Property Stays Ltd | Hospitality | 2026 |
| Appie Holdings Corporation LP | | 2016 |
| Appin Group Holdings Ltd | Financial services | 2021 |
| Appin Holiday Lets Ltd | Hospitality | 2022 |
| Appin Property Company Limited | Real estate | 2018 |
| Appin Property Lettings Limited | Real estate | 2018 |
| Appin Sports Ltd | Wholesale & retail | 2020 |
| Appindale Limited | Financial services | 1998 |
| Appio Limited | Information & communication | 2024 |
| Apple Music Ltd | Wholesale & retail | 2019 |
| Appleby & Sons Consultants & Solutions Ltd | Professional & scientific | 2023 |
| Applecote Ltd | Real estate | 2025 |
| Applecrest Ltd. | Wholesale & retail | 2007 |
| Applecross Creation Limited | Real estate | 2007 |
| Applecross Ltd | Real estate | 2020 |
| Applecross Properties Ltd | Construction | 2023 |
| Applefax Solutions LP | | 2012 |
| Appleton Berkshire & Co Limited | Other services | 2020 |
| Applewood Alliance LP | | 2015 |
| Applied Capital Developments Limited | Professional & scientific | 2012 |
| Applied Capital Holdings Limited | Professional & scientific | 2012 |
| Applied Capital Limited | Professional & scientific | 2000 |
| Applied Computer Vision Ltd | Information & communication | 2022 |
| Applied Corporation L.P. | | 2012 |
| Applied Neuroscience Consulting and Research Ltd | Health & social care | 2026 |
| Applied Tech Solutions Ltd | Construction | 2022 |
| Applied Technology Worldwide L.P. | | 2012 |