| AN Awesome Day Ltd | Wholesale & retail | 2026 |
| An-Ro Procurement Limited | Real estate | 2009 |
| ANA Buildings Limited | Administrative & support | 2020 |
| Anaam Ltd | Transport & logistics | 2022 |
| Anael IT Services Ltd | Information & communication | 2014 |
| Anago Consultancy Services Limited | Information & communication | 2007 |
| Anaisa Limited | Health & social care | 2012 |
| Anaisabel Ltd | Health & social care | 2021 |
| Anakriss Consultants Limited | Information & communication | 1997 |
| Analaigh Technology Limited | Information & communication | 2012 |
| Analog Robot Holding Ltd | Financial services | 2026 |
| Analyzd Ltd | Professional & scientific | 2022 |
| Anama Capital Ltd | Real estate | 2024 |
| Ananda Enterprises Ltd | Information & communication | 2011 |
| Anandha Station Grove Ltd | Real estate | 2021 |
| Anaptiksys Ltd | Information & communication | 2018 |
| Anarchy Limited | Information & communication | 2012 |
| Anaxagoras Ltd | Construction | 2019 |
| Anaya Estates Ltd | Real estate | 2025 |
| ANB Food Ltd | Hospitality | 2026 |
| ANC Recruitment Ltd | Professional & scientific | 2024 |
| Anchor 24/7 Security Limited | Administrative & support | 2021 |
| Anchor Recycling & Waste Management Ltd | Water & waste | 2020 |
| Anchoredge Ltd | Information & communication | 2024 |
| Anda Consultancy Limited | Professional & scientific | 2019 |
| Andalidi Assets Ltd. | Other services | 2012 |
| Andalidi Invest Ltd. | Other services | 2012 |
| Anderson Business Consulting Ltd | Professional & scientific | 2021 |
| Anderson Computing Ltd | Information & communication | 2011 |
| Andia Financial Advisory Ltd | Professional & scientific | 2026 |
| Andiano Ltd | Information & communication | 2024 |
| Andil Brothers Limited | Administrative & support | 2017 |
| Andis Communications Limited | Professional & scientific | 2003 |
| Andjela Limited | Real estate | 2017 |
| Andon S Consulting Limited | Professional & scientific | 2012 |
| Andrea &Aimy Limited | Wholesale & retail | 2025 |
| Andreae Data Limited | Information & communication | 2025 |
| Andreas Cleaning Ltd | Administrative & support | 2019 |
| Andrew Blake Designs Limited | Manufacturing | 1995 |
| Andrew Gardner Consulting Ltd | Professional & scientific | 2026 |
| Andrew H Watson Electrical Limited | Construction | 2015 |
| Andrewson Consultants Limited | Information & communication | 2014 |
| Andy & Mary FOX Limited | Health & social care | 2022 |
| Andy Pro Ltd | Construction | 2015 |
| Andy Self Storage Ltd | Transport & logistics | 2010 |
| Andybabuska Limited | Construction | 2017 |
| Andys Engineering Ltd | Manufacturing | 2017 |
| Aneid UK Limited | Wholesale & retail | 2012 |
| Anenta Itech Limited | Information & communication | 2017 |
| Aneurin Property Limited | Real estate | 2019 |
| Aneva Technologies Limited | Information & communication | 2025 |
| ANG Business Solutions Ltd | Professional & scientific | 2011 |
| Angel Advisors Ltd | Information & communication | 2024 |
| Angel Financial Consulting Limited | Professional & scientific | 2021 |
| Angel Fintech Limited | Financial services | 2017 |
| Angel Homes and Investments Ltd | Real estate | 2023 |
| Angel IT Solutions Ltd | Information & communication | 2018 |
| Angel Logistics ( PVT ) Ltd | Transport & logistics | 2021 |
| Angel Whisper Ltd | Financial services | 2021 |
| Angels Care Home Ltd | Health & social care | 2022 |
| Angelway Limited | Real estate | 2017 |
| Angie's Cafe Hatfield Ltd | Hospitality | 2015 |
| Anglesay Company Services Ltd | Administrative & support | 2012 |
| Anglo European Company Limited | Information & communication | 2026 |
| Anglo Innovative Limited | Extraterritorial | 2018 |
| Anglo Products Ltd | Extraterritorial | 2018 |
| Anglo Services Limited | Extraterritorial | 2018 |
| Anglo Supplies Ltd | Extraterritorial | 2018 |
| Anglo-Aleutian Consulting Ltd | Information & communication | 2014 |
| Angloafro Limited | Extraterritorial | 2018 |
| Anhad Transports Ltd | Transport & logistics | 2025 |
| Anil Kent Limited | Health & social care | 2007 |
| Anjana Overseas Limited | Financial services | 2022 |
| Anjli Yoga Ltd | Health & social care | 2021 |
| Anjo Trans Ltd | Transport & logistics | 2023 |
| Anjuma Limited | Financial services | 2018 |
| Anker Technology (UK) Ltd | Wholesale & retail | 2013 |
| Ankita Enterprises Limited | Real estate | 2020 |
| Anksley Ltd | Health & social care | 2016 |
| Anlex Limited | Wholesale & retail | 2005 |
| ANM Care Limited | Health & social care | 2023 |
| Anmata Investments Limited | Financial services | 1996 |
| Anmel Ltd | Information & communication | 2021 |
| ANN Cosmetics and Beauty Centre Ltd | Other services | 2023 |
| Ann-Marie Harwin Garden Design Ltd | Administrative & support | 2023 |
| Anna's Aesthetics & Beauty Limited | Other services | 2019 |
| Anna's Unique Sales Ltd | Administrative & support | 2025 |
| Anna-Sophia Chapman Limited | Professional & scientific | 2013 |
| Annaizu Ltd | Information & communication | 2013 |
| Annaj Consulting Ltd | Professional & scientific | 2022 |
| Annb Consulting Limited | Professional & scientific | 2025 |
| Annb Limited | Real estate | 2024 |
| Annette Clements Limited | Administrative & support | 2009 |
| Anoka UK Limited | Real estate | 2013 |
| ANP Agency Limited | Health & social care | 2014 |
| ANP Civils Ltd | Construction | 2022 |
| Anrad European Limited | Construction | 2005 |
| ANS Carpentry Ltd | Manufacturing | 2018 |
| ANS Properties Constructions Limited | Construction | 2021 |
| ANT 24 Electrical Ltd | Construction | 2024 |