| 01 Ventures I GP LLP | | 2016 |
| 01 Ventures I LP | | 2016 |
| 01 Ventures LLP | | 2015 |
| 01 Ventures Nominee I Limited | Financial services | 2016 |
| 01 Ventures Nominee II Limited | Financial services | 2016 |
| 12 Vera Road Freehold Limited | Real estate | 2005 |
| 12 Vera Road RTM Company Limited | Real estate | 2005 |
| 13TEN Consulting Ltd | Professional & scientific | 2026 |
| 1989 Events Ltd | Administrative & support | 2022 |
| 219 CRM Limited | Other services | 2020 |
| 29 House Ltd | Real estate | 2020 |
| 2K Vehicles Ltd | Wholesale & retail | 2022 |
| 303 Alexandra Park Road Limited | Households | 2016 |
| 3C Property Ltd | Construction | 2022 |
| 43 ST Paul's Road, N1 Management Company Limited | Households | 1996 |
| 88 Men's Hair Limited | Other services | 2018 |
| A & M Productions Limited | Arts & recreation | 2002 |
| A D B Plastering Ltd | Construction | 2016 |
| A.S. BIZ Empire Ltd | Professional & scientific | 2009 |
| A25 Cars Limited | Transport & logistics | 2020 |
| AAM Capital Limited | Administrative & support | 2016 |
| Academy Design and Restoration Ltd | Construction | 2023 |
| Accelerated Motor Repairs Oxted Limited | Wholesale & retail | 2024 |
| Access Towers Services Ltd | Construction | 2004 |
| ACD Partners LLP | | 2016 |
| Ace Welding Engineering Limited | Administrative & support | 2019 |
| ACH Pre-Hospital Limited | Administrative & support | 2020 |
| Acoustic Windows Ltd | Construction | 2014 |
| Activeedge Holdings Ltd | Financial services | 2025 |
| Activeedge Sports Group (Community) Ltd | Education | 2024 |
| Activeedge Sports Group (Services) Ltd | Education | 2024 |
| Activeedge Sports Group Ltd | Health & social care | 2022 |
| Acvita Limited | Professional & scientific | 2009 |
| Addiscombe Environmental Consultants Limited | Professional & scientific | 2004 |
| Admin ETC Ltd | Administrative & support | 2023 |
| Advance Gymnastics Club Ltd | Education | 2021 |
| AEW Property Investment Limited | Real estate | 2019 |
| Affinity Build Pro Limited | Construction | 2023 |
| AG Property & Capital Ltd | Real estate | 2026 |
| Agile Optic Ltd | Construction | 2022 |
| Agile Risk Newco Limited | Financial services | 2021 |
| AH Property Consultancy Ltd | Real estate | 2020 |
| AH20 Environmental Services Limited | Professional & scientific | 2007 |
| Airmid Group Ltd | Hospitality | 2026 |
| Airmid Healthcare Ltd | Administrative & support | 2021 |
| Airmid Staffing Ltd | Administrative & support | 2021 |
| Airmid Supported Living Ltd | Hospitality | 2026 |
| Airmid Training Academy Ltd | Education | 2026 |
| Airscan Drone Services Ltd | Extraterritorial | 2025 |
| AJ Relocations Ltd | Transport & logistics | 2021 |
| Ajmal Agro Tech (UK) Limited | Extraterritorial | 1997 |
| Ajmal Fragrances & Fashions (UK) Limited | Extraterritorial | 1997 |
| Ajmal Holdings & Investments (UK) Limited | Extraterritorial | 1997 |
| Ajmal International (UK) Limited | Professional & scientific | 1997 |
| Ajmal Perfume (UK) Limited | Manufacturing | 1997 |
| Alan Mitchell Financial Recruitment Limited | Administrative & support | 2002 |
| Alara DUO Limited | Financial services | 2018 |
| Alara Investments Limited | Financial services | 2013 |
| Alberose Ltd | Construction | 2023 |
| Alchemist Trading Ltd | Information & communication | 2024 |
| Alec Wilson Property Investments Ltd | Real estate | 2024 |
| Alex Kingston Limited | Information & communication | 2021 |
| Alexander Place Management Company Ltd | Real estate | 2003 |
| Alfa Waterproofing Systems Ltd | Wholesale & retail | 2015 |
| Alison Kellett Advisory Services Ltd | Professional & scientific | 2024 |
| Aljoma Ltd | Construction | 2015 |
| ALL Colour Rendering Ltd | Construction | 2026 |
| ALL Worked OUT Limited | Arts & recreation | 2017 |
| Allround Solutions (Surrey) Ltd | Administrative & support | 2023 |
| AM Heating Solutions Ltd | Construction | 2010 |
| AM Interior Solutions Ltd | Construction | 2025 |
| Amazing Angels Homecare Limited | Health & social care | 2011 |
| AMB Financial Solutions Ltd | Financial services | 2025 |
| Amber Concept Ltd | Construction | 2016 |
| Ambition Coach Ltd | Education | 2019 |
| Amdon Holdings Limited | Financial services | 2016 |
| Amity Building Control Ltd | Construction | 2018 |
| Anderson Oram Ltd | Construction | 2007 |
| Anivad Consulting Ltd | Administrative & support | 2019 |
| Aonyx Philately Ltd | Wholesale & retail | 2023 |
| Apac Business Consulting Limited | Professional & scientific | 2011 |
| Apex-Ins Consultants Limited | Financial services | 2024 |
| Apollo Colours Limited | Manufacturing | 1983 |
| Apollo Inks & Coatings International Limited | Manufacturing | 1994 |
| Appmaster Ltd | Information & communication | 2015 |
| Approved Tradesmen Limited | Other services | 2022 |
| Apps Outdoor Services Limited | Administrative & support | 2026 |
| Arbo Services Ltd | Information & communication | 2017 |
| Arbqs Ltd | Professional & scientific | 2010 |
| Arca Trading Ltd | Wholesale & retail | 2026 |
| Arctik Limited | Information & communication | 2015 |
| Arcus Park BH Limited | Construction | 2014 |
| Arcus-Pcd Limited | Construction | 2014 |
| Aria Asia Limited | Wholesale & retail | 2022 |
| Arko Property Refit Ltd | Construction | 2015 |
| ARL Construction (2017) Ltd | Construction | 2017 |
| Armstrong Walsh Ltd | Professional & scientific | 2013 |
| ARP Surveyors Limited | Professional & scientific | 2017 |
| Art Lions Limited | Wholesale & retail | 2019 |
| ASF Cleaning Services Limited | Administrative & support | 2006 |