| AN Property Management Ltd | Real estate | 2023 |
| AN Sports Limited | Arts & recreation | 2026 |
| Anah Project Ltd | Health & social care | 1994 |
| Analytic View Ltd | Professional & scientific | 2024 |
| Analytix Solutions Limited | Information & communication | 2023 |
| Anam Alam Ltd | Health & social care | 2024 |
| Anand Group 2019 Limited | Real estate | 2019 |
| Anaqa Studio Ltd | Wholesale & retail | 2024 |
| Anaraf Global Ltd | Wholesale & retail | 2026 |
| Anarchy Cinema Ltd | Information & communication | 2017 |
| Anarkali Cooperations Ltd | Wholesale & retail | 2022 |
| Anatik.Uk Ltd | Wholesale & retail | 2023 |
| Anatsz Limited | Wholesale & retail | 2022 |
| Anaya Care Limited | Health & social care | 2016 |
| Anaya Traders Limited | Wholesale & retail | 2018 |
| Anaya’S Beauty Bar Limited | Other services | 2023 |
| ANB Official Ltd | Wholesale & retail | 2020 |
| Anchor & Co Cleaning Limited | Administrative & support | 2025 |
| Anchor 2020 Limited | Construction | 2008 |
| Anchor Bridge Living Ltd | Health & social care | 2025 |
| Anchor Fire Compliance Services Ltd | Professional & scientific | 2026 |
| Anchor Lifestyle Developments Limited | Construction | 2007 |
| Anchor Nest Properties Ltd | Real estate | 2021 |
| Anchor Repairs and Property Services Limited | Real estate | 2021 |
| Anchor Wellbeing CIC | Health & social care | 2026 |
| Anchorelite Ltd | Administrative & support | 2025 |
| Anchorpoint Club Ltd | Education | 2025 |
| Andeals Ltd | Wholesale & retail | 2024 |
| Andeana Ltd | Extraterritorial | 2025 |
| Andersol Services Ltd | Administrative & support | 2024 |
| Andina Ceviche Limited | Hospitality | 2022 |
| ANDR3 Limited | Professional & scientific | 2022 |
| Andrew Dunne Limited | Construction | 2001 |
| Andrew Dunne Properties Limited | Construction | 2017 |
| Andrew Garner Electrical Contractor Limited | Construction | 2005 |
| Andrew Gullett Legal Consulting Ltd | Administrative & support | 2025 |
| Andrew Orme Commercial Consultancy Limited | Professional & scientific | 2020 |
| Andrew Stott Limited | Administrative & support | 2009 |
| Andy Hire Groundworks Limited | Construction | 2015 |
| Aneeq Hassan Limited | Wholesale & retail | 2024 |
| Anees Consultant Ltd | Extraterritorial | 2021 |
| Aneesa (UK) Ltd | Professional & scientific | 2014 |
| Aneesa 27 Ltd | Wholesale & retail | 2023 |
| Aneta Protection Limited | Financial services | 2026 |
| ANF Solutions Limited | Professional & scientific | 2025 |
| Angalamman Periasamy Services Ltd | Wholesale & retail | 2020 |
| Angel Distribution Limited | Transport & logistics | 1998 |
| Angel Export Import Ltd | Administrative & support | 2016 |
| Angel Iris Ltd | Hospitality | 2023 |
| Angel Properties (Yorks) | Administrative & support | 2001 |
| Angels Capital & Investments Ltd | Professional & scientific | 2023 |
| Angels Enterprises Limited | Wholesale & retail | 2014 |
| Angels Express Ltd | Transport & logistics | 2025 |
| Angels Finance & Management Group Ltd | Professional & scientific | 2021 |
| Angels Finance and Management Ltd | Professional & scientific | 2017 |
| Angle Roofing & Cladding Ltd | Other services | 2010 |
| Anglo East Cars Ltd T/A Anglo East Properties Limited | Real estate | 2010 |
| Anglo Flooring Ltd | Construction | 2023 |
| Anglo Healthcare Ltd | Health & social care | 2013 |
| Anglo-Sonics Limited | Arts & recreation | 2026 |
| Angry Wrapper Ltd | Wholesale & retail | 2023 |
| ANH Trade Ltd | Wholesale & retail | 2024 |
| Aniela Angelika Ltd | Wholesale & retail | 2020 |
| Animal Clinic Building Company Ltd | Construction | 2001 |
| Animal Fibres (Europe) Limited | Extraterritorial | 1975 |
| Animal Magic Dog Grooming Ltd | Other services | 2022 |
| Anime Infinite Ltd | Information & communication | 2025 |
| Animo Consultancy Ltd | Information & communication | 2006 |
| Aniq Gifts Limited | Wholesale & retail | 2020 |
| Aniq Homes Limited | Real estate | 2019 |
| Anis Consulting Limited | Professional & scientific | 2013 |
| Anitamax Limited | Wholesale & retail | 2023 |
| Anjali K Eyecare Ltd | Wholesale & retail | 2025 |
| Anjkilburn Ltd | Administrative & support | 2025 |
| Anjna Enterprise Limited | Financial services | 2004 |
| Anjoh Hair & Beauty Ltd | Wholesale & retail | 2026 |
| Anka Interiors Ltd | Construction | 2018 |
| Ankiedo Ltd | Administrative & support | 2025 |
| Anlaby Retail Limited | Hospitality | 2019 |
| Anmi Rizq Holdings Ltd | Financial services | 2026 |
| Anmol by Jalwa Ltd | Professional & scientific | 2026 |
| Anna Aesthetics Ltd | Health & social care | 2021 |
| Anna Haugh Holdings Ltd | Financial services | 2024 |
| Anna Innvestments Ltd | Hospitality | 2024 |
| Anna Traders PVT Ltd | Wholesale & retail | 2025 |
| Annabelle Bijou Ltd | Wholesale & retail | 2025 |
| Annam Abayahs Ltd | Wholesale & retail | 2025 |
| Annex Consultancy Limited | Professional & scientific | 2024 |
| Annex Luxury Travel Limited | Transport & logistics | 2025 |
| Annings (Ilkley) Limited | Wholesale & retail | 1960 |
| Annovan Holdings Ltd | Construction | 2022 |
| Anoob Pakkar-Hull Limited | Health & social care | 2022 |
| Anoob Pakkar-Hull Training Academy Limited | Administrative & support | 2023 |
| Another Lunar Year Ltd | Education | 2022 |
| Another Touch Ltd | Hospitality | 2014 |
| Anovra Ltd | Manufacturing | 2026 |
| ANS Traders Limited | Wholesale & retail | 2020 |
| Ansa Property Development Ltd | Wholesale & retail | 2019 |
| Ansar Travels Ltd | Transport & logistics | 2023 |
| Anshveer Fashions Ltd | Wholesale & retail | 2024 |