| Anaban Limited | Administrative & support | 2026 |
| Anabell 21 Ltd | Administrative & support | 2022 |
| Anabia Transports Ltd | Transport & logistics | 2017 |
| Anadi Skin Clinic Ltd | Other services | 2025 |
| Anafm Ltd | Administrative & support | 2012 |
| Anagkazo Limited | Administrative & support | 2021 |
| Analytics Accounting Limited | Professional & scientific | 2025 |
| Analytics and Reporting UK Limited | Administrative & support | 2024 |
| Anan Tradings Ltd | Transport & logistics | 2025 |
| Anarisora Limited | Professional & scientific | 2025 |
| Anastasia Building Ltd | Construction | 2021 |
| Anastasia Carpentry Ltd | Construction | 2024 |
| Anayzes Logistics Limited | Transport & logistics | 2025 |
| Anbabs Ltd | Health & social care | 2019 |
| Anbc UK Limited | Administrative & support | 2021 |
| Anchor Global Healthcare Ltd | Health & social care | 2022 |
| Anchor Global Healthcare Recruitment Ltd | Administrative & support | 2023 |
| Anchor Sports Group Ltd | Arts & recreation | 2024 |
| Anchorpoint Support Ltd | Health & social care | 2025 |
| Andi 79 Ltd | Other services | 2013 |
| Andice Lettings Ltd | Real estate | 2022 |
| Andrei's Team Ltd | Construction | 2016 |
| Andrejus Dovidaitis Services Limited | Construction | 2025 |
| Andrew and Brother Ltd | Water & waste | 2023 |
| Andrew the Chauffeur Ltd | Other services | 2013 |
| Andrews Elite Motors Ltd | Wholesale & retail | 2026 |
| Andrews Interiors Ltd | Construction | 2013 |
| Android Properties Limited | Real estate | 2024 |
| Andronache Services Ltd | Construction | 2023 |
| Androy Ltd | Manufacturing | 2018 |
| Andymartha Ventures Ltd | Health & social care | 2022 |
| Anelio General Construction Ltd | Construction | 2023 |
| Anelio Properties Limited | Real estate | 2023 |
| Anesunorah Ltd | Health & social care | 2014 |
| ANG Homes Ltd | Real estate | 2021 |
| Angel and Father Limited | Construction | 2007 |
| Angel Motoring Solution Ltd | Administrative & support | 2019 |
| Angel Moves Anything Ltd | Transport & logistics | 2019 |
| Angel Sales Ltd | Wholesale & retail | 2019 |
| Angel Smile Ltd | Health & social care | 2013 |
| Angel Training Centre Ltd | Education | 2019 |
| Angel UK Care Limited | Health & social care | 2019 |
| Angel Whitestone Sourcing Ltd | Administrative & support | 2023 |
| Angela RUS Ltd | Manufacturing | 2019 |
| Angelex Ltd | Wholesale & retail | 2026 |
| Angelhugs Daycare Limited | Health & social care | 2024 |
| Angelic Beauty Ltd | Other services | 2025 |
| Angelics Consult UK Ltd | Public administration | 2019 |
| Anglija Tax Ltd | Professional & scientific | 2011 |
| Anglowide Estates Limited | Real estate | 2014 |
| ANH Global Ltd | Wholesale & retail | 2024 |
| Aniko Csiszer Ltd | Extraterritorial | 2024 |
| Anivad Limited | Health & social care | 2018 |
| Anjalinthomas Ltd | Professional & scientific | 2023 |
| Ankita Ltd | Wholesale & retail | 2019 |
| ANL Construction Ltd | Construction | 2017 |
| Anna & M Ltd | Transport & logistics | 2021 |
| Anna Seven Limited | Manufacturing | 2025 |
| Anne RAM Ltd | Construction | 2024 |
| Anne-Mary's Bakehut Limited | Manufacturing | 2010 |
| Annechika UK Limited | Administrative & support | 2019 |
| Anneelizabethuk Ltd | Wholesale & retail | 2025 |
| Annie Charlie Limited | Information & communication | 2025 |
| Annoh Prempeh Construction Ltd | Construction | 2020 |
| Anokyecares Ltd | Health & social care | 2022 |
| Anomaq Ltd | Professional & scientific | 2016 |
| Antalya Kebab House Ltd | Hospitality | 2026 |
| Anthill & KA Ltd | Construction | 2019 |
| Anthony Catering Limited | Hospitality | 2022 |
| Anthony Tactics Limited | Construction | 2016 |
| Antikvium Limited | Wholesale & retail | 2024 |
| Antonio Property Ltd | Real estate | 2022 |
| Antwous Cleaning Services Limited | Administrative & support | 2020 |
| ANU4 Limited | Health & social care | 2012 |
| Anuonyam UK Limited | Construction | 2025 |
| ANW Property Services Ltd | Construction | 2022 |
| Anyachrissy Network Limited | Transport & logistics | 2012 |
| Anytime Shopfronts Ltd | Construction | 2019 |
| AOD Limited | Information & communication | 2019 |
| AOH TCG Ltd | Wholesale & retail | 2025 |
| Aone International Ltd | Real estate | 2020 |
| AOO Properties Ltd | Real estate | 2022 |
| AOS MAX Global Ltd | Wholesale & retail | 2023 |
| AP B&C Ltd | Administrative & support | 2026 |
| AP Digital Consultancy Ltd | Information & communication | 2020 |
| AP Graphic Design Ltd | Professional & scientific | 2019 |
| AP Interiors Ltd | Construction | 2026 |
| APA Building Construction Ltd | Construction | 2016 |
| Apace Investment Limited | Real estate | 2023 |
| Apace Support Services Limited | Hospitality | 2020 |
| Apaceswift Limited | Health & social care | 2019 |
| Apdr Services Ltd | Construction | 2019 |
| Apel Electrical Ltd | Construction | 2016 |
| Apex Bodyshop Limited | Wholesale & retail | 2026 |
| Apex Catering Services Ltd | Hospitality | 2026 |
| Apex Finish Ltd | Construction | 2024 |
| Apex HR Consulting Ltd | Professional & scientific | 2014 |
| Apex Prestige Collection Ltd | Administrative & support | 2026 |
| Apex Shopfitters Ltd | Construction | 2016 |
| Apexinsulations Limited | Construction | 2026 |