| Antique Travel L.P. | | 2015 |
| Antiques by Appointment Limited | Wholesale & retail | 2026 |
| Antler Films Ltd | Information & communication | 2024 |
| Antler Ventures Scotland LP | | 2019 |
| Antlers Technologies Ltd | Information & communication | 2025 |
| Antlia Sales LP | | 2016 |
| Antmit Limited | Health & social care | 2015 |
| Antoinette Roxburgh Properties Limited | Real estate | 2025 |
| Anton Lennon Limited | Professional & scientific | 2016 |
| Anton Trade LP | | 2016 |
| Antonine Property Services Limited | Real estate | 2024 |
| Antonopoulos Oral Care Ltd | Health & social care | 2023 |
| Antony Slack Ltd | Information & communication | 2008 |
| Antrim Enterprises | | 2007 |
| Antrodia Camphorata Wellness Limited | Professional & scientific | 2026 |
| Anturas Consulting Ltd | Professional & scientific | 2015 |
| Antwerpen Impex LP | | 2011 |
| ANU Aesthetics Limited | Public administration | 2025 |
| ANU Trade LP | | 2017 |
| Anush Creations Ltd | Wholesale & retail | 2025 |
| Anvanda LP | | 2016 |
| Anvil Active LP | | 2016 |
| Anvil Intelli LP | | 2016 |
| Anvil Systems LP | | 2015 |
| Anviom Consulting Limited | Information & communication | 2020 |
| Anwar's Local Store Limited | Wholesale & retail | 2023 |
| Anworld Universal L.P. | | 2009 |
| ANY Level Window Cleaning Ltd | Administrative & support | 2019 |
| ANY Supreme LP | | 2016 |
| Anyes Crafts Ltd | Wholesale & retail | 2025 |
| Anymart Ltd | Wholesale & retail | 2021 |
| Anything Goes (Embroidery) Ltd. | Manufacturing | 1994 |
| Anything Hosted Ltd | Information & communication | 2008 |
| Anything Plus Everything Ltd | Wholesale & retail | 2017 |
| Anywhere Digital LP | | 2024 |
| AO Property Holdings Limited | Real estate | 2021 |
| Aonaibh Ltd | Education | 2010 |
| AOP Associates Ltd | Construction | 2018 |
| AOP Limited | Information & communication | 2002 |
| Aopia Limited | Financial services | 2025 |
| AOR Commerce L.P. | | 2015 |
| Aoraki Cargo LP | | 2011 |
| Aotearoa Limited | Professional & scientific | 1998 |
| Aouane Property Ltd | Real estate | 2022 |
| AP Csip FP 1 L.P. | | 2019 |
| AP Csip FP GP LLP | | 2018 |
| AP Fusion Limited | Hospitality | 2026 |
| AP Inspection Ltd | Construction | 2026 |
| AP Luxury Travel (Scotland) Ltd | Transport & logistics | 2024 |
| AP Psychiatry Ltd | Health & social care | 2023 |
| AP Shipping & Logistics LP | | 2017 |
| AP Ventures Carried Interest I GP LLP | | 2018 |
| AP Ventures Carried Interest I LP | | 2018 |
| AP Ventures Carried Interest II GP LLP | | 2018 |
| AP Ventures Carried Interest II LP | | 2018 |
| AP Ventures Carried Interest III GP LLP | | 2023 |
| AP Ventures Carried Interest III LP | | 2023 |
| Ap&S Technics LP | | 2013 |
| Apache Automotive Limited | Manufacturing | 2021 |
| Apache Global L.P. | | 2010 |
| Apache International L.P. | | 2008 |
| Apae Property Ltd | Real estate | 2024 |
| Apak Traders Limited | Wholesale & retail | 2019 |
| Aparangi Ltd | Professional & scientific | 2009 |
| Apart Hotels Worldwide Ltd | Hospitality | 2019 |
| Apart- Amity Inn Limited | Hospitality | 2024 |
| Apatura Alba Ltd | Information & communication | 2024 |
| Apax Europe IV CI L.P. | | 2004 |
| Apax Europe IV Founder L.P. | | 2004 |
| Apax Europe VI - 1 Nominee Limited | Professional & scientific | 2006 |
| Apax Europe VI - a Nominee Limited | Professional & scientific | 2006 |
| Apax Europe VII - a (Erisa Feeder), L.P. | | 2007 |
| Apax Europe VII - a (Feeder), L.P. | | 2007 |
| Apax Scotland Germany II, L.P. | | 1999 |
| Apax Scotland PIC II LP | | 1996 |
| Apax Scotland PIC LP | | 1996 |
| Apax Scotland V Limited Partnership | | 1994 |
| Apax Scotland Ventures IV LP | | 1991 |
| Apax Scotland VI LP | | 1997 |
| APC Academy Limited | Professional & scientific | 2016 |
| Apdsmeadvisory Ltd | Professional & scientific | 2023 |
| APE Limited Partnership | | 2005 |
| APE Media Limited | Administrative & support | 2006 |
| Apec Properties Ltd | Real estate | 2025 |
| Apella Impex LP | | 2014 |
| Apelton Alliance LP | | 2015 |
| Apelton Enterprises LP | | 2015 |
| Aperon LP | | 2018 |
| Aperta AI Ltd | Information & communication | 2026 |
| Apex Anaesthesia Limited | Health & social care | 2023 |
| Apex Auto Performance Ltd | Wholesale & retail | 2024 |
| Apex Building Contracts Ltd | Administrative & support | 2021 |
| Apex Concurrent Ltd | Information & communication | 2023 |
| Apex Contracts Limited | Construction | 2018 |
| Apex Corporate Consultants Holdings LP | | 2018 |
| Apex Corporate Consultants L.P. | | 2015 |
| Apex Delta L.P. | | 2009 |
| Apex Empire LP | | 2017 |
| Apex Group Holdco Limited | Financial services | 2026 |
| Apex Hope Limited | Health & social care | 2026 |