| Anchard Associates LLP | | 2007 |
| Anchor Automotive Ltd | Wholesale & retail | 2026 |
| Anchor Cars Ltd | Wholesale & retail | 2016 |
| Anchor House Properties Limited | Construction | 2000 |
| Anchor Security & Staffing Ltd | Administrative & support | 2020 |
| Anchor Vans Ltd. | Wholesale & retail | 1989 |
| Ancient Aviation Limited | Manufacturing | 2020 |
| Ancient World Ltd | Wholesale & retail | 2025 |
| AND Business Services Limited | Extraterritorial | 1996 |
| AND SHE Loves Bridal Ltd | Wholesale & retail | 2014 |
| Andani Tour Afro Limited | Health & social care | 2013 |
| Anderson Mckenzie Consulting Limited | Information & communication | 1992 |
| Anderson Surveying and Project Management Limited | Professional & scientific | 2024 |
| Anderson's Law Limited | Public administration | 2021 |
| Andersons Construction Ltd | Construction | 2019 |
| Andmeg Limited | Real estate | 2023 |
| Andonov & Co Limited | Construction | 2023 |
| Andoris Limited | Wholesale & retail | 2021 |
| Andrady Automotive Ltd | Wholesale & retail | 2026 |
| Andrea Leigh Healthcare Consultancy Ltd | Administrative & support | 2015 |
| Andrei Lifting Services Ltd | Construction | 2019 |
| Andresa Limited | Professional & scientific | 2009 |
| Andrew Allen Saddle Fitting Services Ltd | Manufacturing | 2020 |
| Andrew G Lajer Limited | Wholesale & retail | 2009 |
| Andrew Goodchild Ltd | Information & communication | 2016 |
| Andrew Griffin Photography Limited | Professional & scientific | 2024 |
| Andrew Storch Solicitors Ltd | Professional & scientific | 2016 |
| Andrew Young Technology Ltd | Information & communication | 2005 |
| Andrews Action Limited | Information & communication | 2020 |
| Andrews Fairway Consultancy Limited | Administrative & support | 2014 |
| Andrews GAS Services Limited | Construction | 2009 |
| Andwell Auto Repairs Ltd | Wholesale & retail | 2016 |
| Andwesellbeer Limited | Hospitality | 2019 |
| Andy Fraser Ltd | Administrative & support | 2018 |
| Andy Gillett Ltd | Administrative & support | 2013 |
| Andy Harvey Works Ltd | Information & communication | 2026 |
| Andy's Yard Limited | Wholesale & retail | 2022 |
| Andytruc Limited | Wholesale & retail | 1975 |
| Anergy Tech Ltd | Information & communication | 2024 |
| Anesco Asset Management Three Limited | Energy | 2013 |
| Anesco Asset Services Limited | Construction | 2025 |
| Anesco Berry Court Limited | Energy | 2014 |
| Anesco Holdings Limited | Professional & scientific | 2019 |
| Anesco Limited | Construction | 2010 |
| Anesco MID Devon Limited | Energy | 2011 |
| Anesco South West Limited | Energy | 2011 |
| Anesco South West Renewables Ltd | Administrative & support | 2014 |
| Anesco Stud Farm Limited | Energy | 2014 |
| Angad Technologies Limited | Information & communication | 2012 |
| Angel Blue Consultancy Limited | Information & communication | 2021 |
| Angel Grove Limited | Real estate | 2022 |
| Angel Spedition Ltd | Transport & logistics | 2021 |
| Angel Springs Holdings Limited | Hospitality | 2011 |
| Angel&Martin Transport Limited | Transport & logistics | 2019 |
| Angela Monti Accountancy Services Ltd | Professional & scientific | 2010 |
| Angela Nails & Beauty Ltd | Other services | 2023 |
| Angela's Nail Bar 23 Ltd | Other services | 2024 |
| Angelfish Innovation Ltd | Wholesale & retail | 2025 |
| Angell Engineering Ltd | Administrative & support | 2022 |
| Angelzh Q Limited | Information & communication | 2015 |
| Anger Mgmt Ltd | Information & communication | 2011 |
| Angiraf Limited | Professional & scientific | 2022 |
| Anglo Fens Ltd | Information & communication | 2025 |
| Anglo-American Asset Management Limited | Extraterritorial | 1978 |
| Anglochoice Property Management Company Limited | Households | 1995 |
| Anglopolska Limited | Information & communication | 2006 |
| Angolo Enterprise Limited | Health & social care | 2016 |
| Angone Limited | Construction | 2022 |
| Angus Autos Limited | Wholesale & retail | 2007 |
| Angusplumbing Ltd | Construction | 2022 |
| Aniekov Ltd | Information & communication | 2011 |
| Anil Srih Ltd | Health & social care | 2020 |
| Animality Limited | Construction | 2019 |
| Animated Transitions Ltd | Professional & scientific | 2022 |
| Anishul Enterprises Ltd | Real estate | 2024 |
| Anjana Groceries Wholesale Ltd | Wholesale & retail | 2020 |
| Anjum Transport Limited | Transport & logistics | 2016 |
| Anker Limited | Extraterritorial | 2004 |
| Ankobra Foundation | Education | 2010 |
| Ankon S.B.S. Limited | Construction | 2016 |
| Anmol Essentials Ltd | Wholesale & retail | 2026 |
| ANN Consulting Ltd | Professional & scientific | 2024 |
| Annadurdyyev Properties Ltd | Real estate | 2025 |
| Annamalaiyar Limited | Information & communication | 2025 |
| Annangwane Ltd | Health & social care | 2022 |
| Annapoorna Business Solutions Limited | Other services | 2017 |
| Annas Catering Ltd | Hospitality | 2023 |
| Anne Owen Architects Ltd | Professional & scientific | 2014 |
| Annette Fairweather Ltd | Wholesale & retail | 2023 |
| Annext Tech Solutions Limited | Information & communication | 2015 |
| Annk Services Ltd | Other services | 2026 |
| Annmarie Consulting Limited | Extraterritorial | 2010 |
| ANNOUNCE24 Ltd | Information & communication | 2020 |
| Annsayu Ltd | Real estate | 2022 |
| Anoc Associates Ltd | Professional & scientific | 2018 |
| Anointed Path Mentorship Limited | Other services | 2025 |
| Anoshmart Limited | Wholesale & retail | 2025 |
| ANP Technologies Limited | Information & communication | 2011 |
| ANR RP Limited | Financial services | 2023 |
| ANR Solar (UK) Limited | Financial services | 2023 |