| ANK Homes Ltd | Real estate | 2025 |
| ANK Services Ltd | Water & waste | 2019 |
| ANK Stoke Poges Consultants Ltd | Professional & scientific | 2012 |
| Anmol Singh Ltd | Construction | 2023 |
| Annamatt Ltd | Education | 2026 |
| Annex Distribution Limited | Wholesale & retail | 2020 |
| Anniluxe Global Limited | Wholesale & retail | 2026 |
| Anns Consulting Ltd | Information & communication | 2013 |
| Anobox Limited | Information & communication | 2013 |
| Anonymous Investments Limited | Real estate | 2026 |
| Anoop Smart Gadgets Limited | Wholesale & retail | 2025 |
| Anrak Limited | Information & communication | 2021 |
| Anris Ltd | Wholesale & retail | 2024 |
| Ansareez Limited | Information & communication | 2022 |
| Anstudio Ltd | Wholesale & retail | 2024 |
| Anteiku AI Ltd | Information & communication | 2026 |
| Anthony Cleaning Services Ltd | Administrative & support | 2025 |
| Anthony Edward Estates Limited | Real estate | 2017 |
| Antique Designer Trading Company Ltd | Wholesale & retail | 2025 |
| Antlan Group Limited | Information & communication | 2015 |
| Ants Properties Limited | Real estate | 2025 |
| Antwerp Smiles Ltd | Administrative & support | 2025 |
| ANU Express Ltd | Financial services | 2009 |
| Anuevo Estates Limited | Real estate | 2025 |
| Anuhari Investments Limited | Real estate | 2024 |
| Anup Jethwa Ltd | Health & social care | 2013 |
| Anventures Limited | Wholesale & retail | 2001 |
| Anwar Group Holdings Ltd | Financial services | 2024 |
| ANY Waste Removal Limited | Water & waste | 2026 |
| Anytime Coffee T Limited | Hospitality | 2022 |
| Anytime Radiology UK Limited | Health & social care | 2025 |
| Anzish Ltd | Health & social care | 2024 |
| Anzo Limited | Real estate | 2025 |
| AO Estate Agents Ltd | Real estate | 2021 |
| AOA Property Services Ltd | Households | 2016 |
| Aocg Limited | Professional & scientific | 2010 |
| AOR International Transport UK Ltd | Transport & logistics | 2021 |
| AP Facilities Management Ltd | Real estate | 2023 |
| AP Keat Developments Limited | Wholesale & retail | 2013 |
| AP on Top Limited | Construction | 2025 |
| AP SD Eighty Two Limited | Wholesale & retail | 2026 |
| AP SD Thirty Seven Limited | Wholesale & retail | 2025 |
| AP Sporting Enterprise CIC | Arts & recreation | 2023 |
| AP Studio Group Limited | Information & communication | 2023 |
| AP Windows Glazing Ltd | Construction | 2023 |
| AP28H Limited | Real estate | 2024 |
| Apaak Quality Care Limited | Health & social care | 2023 |
| Apar Solutions Limited | Construction | 2024 |
| Apex Athlete Development Ltd | Other services | 2025 |
| Apex Budget Group UK Ltd | Transport & logistics | 2015 |
| Apex Care Talent Ltd | Administrative & support | 2026 |
| Apex Clinic Limited | Wholesale & retail | 2023 |
| Apex Commercial Ltd | Wholesale & retail | 2023 |
| Apex Commere Ltd | Wholesale & retail | 2026 |
| Apex Consultants Limited | Construction | 2018 |
| Apex Education Solutions Ltd | Education | 2025 |
| Apex Entertainment Limited | Information & communication | 2023 |
| Apex Fasteners Limited | Wholesale & retail | 1987 |
| Apex Finds Ltd | Wholesale & retail | 2026 |
| Apex Flow Commerce Limited | Wholesale & retail | 2026 |
| Apex IT Consulting Limited | Information & communication | 2022 |
| Apex Law Solicitors Limited | Professional & scientific | 2024 |
| Apex Pharmacy Limited | Wholesale & retail | 2023 |
| Apex Prosperity Limited | Hospitality | 2026 |
| Apex Real Estate Holdings Ltd | Real estate | 2024 |
| Apex Real Estate Housing Ltd | Real estate | 2025 |
| Apex Removal Group Ltd | Transport & logistics | 2018 |
| Apex Salvage Limited | Water & waste | 2008 |
| Apex Trading (UK) Ltd | Wholesale & retail | 2011 |
| Apex UK Roofing Ltd | Construction | 2025 |
| Apex Vista UK Ltd | Wholesale & retail | 2026 |
| Apexflow Group Limited | Wholesale & retail | 2026 |
| Apexitc Ltd | Administrative & support | 2016 |
| Apexstellar Financials Ltd | Wholesale & retail | 2023 |
| Apidenna.Com Ltd | Information & communication | 2025 |
| Apkb Ltd | Real estate | 2026 |
| Apmp Consultancy Limited | Information & communication | 2013 |
| Apna Builder Limited | Hospitality | 2022 |
| Apna Halal Meat Shop Ltd | Wholesale & retail | 2021 |
| Apna Kulcha Ltd | Extraterritorial | 2019 |
| Apna Punjab Ltd | Extraterritorial | 2019 |
| Apna Punjab Meat Market Slough Limited | Wholesale & retail | 2018 |
| Apna Virsa Organisation CIC | Other services | 2024 |
| Apollo Heating & Maintenance Ltd | Construction | 2023 |
| Apoorva Restaurant Ltd | Hospitality | 2020 |
| App Service Provider Ltd | Information & communication | 2012 |
| Apparel Atelier Ltd | Wholesale & retail | 2025 |
| Appebyte Ltd | Information & communication | 2012 |
| Appen (UK) Limited | Information & communication | 2008 |
| Appex Safewears Limited | Wholesale & retail | 2026 |
| Appleberry Care Limited | Health & social care | 1998 |
| Appledore Properties LLP | | 2018 |
| Applestone Healthcare Ltd | Health & social care | 2023 |
| Applestone Recovery and Motor Works Limited | Administrative & support | 2025 |
| Applestone Recruitment Ltd | Health & social care | 2020 |
| Applicado FS Consultancy Ltd | Other services | 2007 |
| Apps and Systems Limited | Information & communication | 2012 |
| Appy Ventures Productions Limited | Information & communication | 2014 |
| APQ Corporation Limited | Construction | 2006 |
| APR Transports Ltd | Transport & logistics | 2026 |