| Annesley Trading Limited | Hospitality | 2025 |
| Annex CAB Hire Limited | Administrative & support | 2025 |
| Annie Cleaning Services Ltd | Administrative & support | 2017 |
| Annovim Enterprises Private Limited | Professional & scientific | 2009 |
| Annrospal Company Ltd | Health & social care | 2019 |
| Annwar Hussain (Nottingham) Consultants Ltd | Information & communication | 2018 |
| Another Abode Ltd | Construction | 2024 |
| Another Bite Ltd | Hospitality | 2026 |
| Another Brick in the Wall AL Ltd | Construction | 2024 |
| Another Chance Ltd | Health & social care | 2018 |
| Another Glass Ltd | Hospitality | 2017 |
| Another Level Training Ltd | Health & social care | 2020 |
| Anova Services Ltd | Professional & scientific | 2017 |
| ANP JKT Limited | Health & social care | 2013 |
| ANP Services Spalding Limited | Administrative & support | 2015 |
| Anray Upholstery Limited | Manufacturing | 2025 |
| Anre Solutions Ltd | Information & communication | 2024 |
| Anroma Management Consultancy Limited | Health & social care | 2009 |
| ANS Futures Ltd | Other services | 2019 |
| ANS Shop Ltd | Wholesale & retail | 2025 |
| ANS Shopping Store Limited | Wholesale & retail | 2025 |
| Ansari Bros Ltd | Wholesale & retail | 2025 |
| Ansari Holding Limited | Financial services | 2025 |
| Ansari Property Ltd | Real estate | 2024 |
| Ansari Retail Ltd | Wholesale & retail | 2023 |
| Anscombe Group Limited | Real estate | 2026 |
| Anseba Homes Ltd | Real estate | 2024 |
| Ansel Group Limited | Wholesale & retail | 2023 |
| Anston Consulting Ltd | Professional & scientific | 2025 |
| Ansvar House Ltd | Construction | 2024 |
| Answer 4U Corporate Limited | Professional & scientific | 2011 |
| ANSWER4U Limited | Professional & scientific | 2004 |
| ANT Project Management Limited | Professional & scientific | 2016 |
| Antalya Mapperley Limited | Hospitality | 2026 |
| Antalya Turkish Grill Limited | Hospitality | 2024 |
| Antarian Ltd | Real estate | 2025 |
| Anteam Ltd | Information & communication | 2020 |
| Antek Limited | Administrative & support | 1989 |
| Antera Kitchens Ltd | Hospitality | 2020 |
| Anthea L Allen Limited | Professional & scientific | 2011 |
| Anthemion Live Ltd | Information & communication | 2025 |
| Anthony Burke Joinery Limited | Construction | 2016 |
| Anthony Epworth Limited | Manufacturing | 2002 |
| Anthony Haynes Limited | Professional & scientific | 2022 |
| Anthony John Wilson Limited | Professional & scientific | 2015 |
| Anthony Rule Illustration Limited | Arts & recreation | 2017 |
| Anthosupport Limited | Health & social care | 2025 |
| Anthroengineering Consulting Ltd | Professional & scientific | 2025 |
| Anti Social SS Ltd | Wholesale & retail | 2025 |
| Antica P Limited | Wholesale & retail | 2020 |
| Antier Blockchain Solutions Ltd | Information & communication | 2023 |
| Antigoni Kyriakidou Limited | Health & social care | 2021 |
| Antisocial Media Derbyshire Limited | Education | 2025 |
| Antisocial Media Limited | Information & communication | 2026 |
| Antlion Credit Consulting Ltd | Professional & scientific | 2023 |
| Anton J-V Ltd | Transport & logistics | 2018 |
| Anton Smith Limited | Financial services | 2014 |
| Antonio Ferrara Consultancy Limited | Professional & scientific | 2016 |
| Antowan Ltd | Wholesale & retail | 2024 |
| Antq PVT Ltd | Transport & logistics | 2021 |
| Anugaman Holding Ltd | Financial services | 2025 |
| Anvt Ltd | Construction | 2025 |
| ANW Estates Ltd | Real estate | 2024 |
| Anwar Estates Limited | Real estate | 2024 |
| Anwick Creative Limited | Professional & scientific | 2025 |
| Anwār As-Sa’Ādāt Ltd | Education | 2024 |
| ANX Care Limited | Health & social care | 2024 |
| ANY Waste Recycling (Nottingham) Ltd | Water & waste | 2017 |
| Anyamson Ltd | Health & social care | 2021 |
| Anyshed Limited | Manufacturing | 2023 |
| ANZ Exports UK Ltd | Wholesale & retail | 2025 |
| AO Virtual Ltd | Information & communication | 2020 |
| Aoaz Capital Ltd | Professional & scientific | 2023 |
| AOC Homecare Ltd | Health & social care | 2020 |
| AOG Kleaning Services Limited | Administrative & support | 2025 |
| Aogro Holdings Ltd | Financial services | 2020 |
| AOH Traders Ltd | Wholesale & retail | 2025 |
| AOS ( an Oifig Stáiseanóireachta:) (Office Supplies) Limited | Manufacturing | 2020 |
| AOS Maintainence Limited | Construction | 2019 |
| AOS Renewable Energy Limited | Construction | 2021 |
| Aosurgical Ltd | Professional & scientific | 2019 |
| AOT Coaches Nottingham LLP | | 2010 |
| AOT Travel Ltd | Extraterritorial | 2006 |
| AOU Studio Limited | Real estate | 2022 |
| AP Air Limited | Construction | 2023 |
| AP Decorations & Finishings Ltd | Construction | 2025 |
| AP Development Ltd Limited | Construction | 2024 |
| AP Diamond Drilling Ltd | Construction | 2022 |
| AP Education Services Ltd | Education | 2019 |
| AP Gene LAB Ltd | Professional & scientific | 2025 |
| AP Joinery Limited | Construction | 2025 |
| AP Nottingham Limited | Hospitality | 2025 |
| AP Print Group Limited | Manufacturing | 2022 |
| AP Renovations Group Ltd | Manufacturing | 2022 |
| AP Restaurant Limited | Hospitality | 2025 |
| AP Staff Services Limited | Administrative & support | 2023 |
| AP Stained Glass Design Ltd | Wholesale & retail | 2023 |
| AP1 Properties Limited | Real estate | 2022 |
| Apac Insights Ltd | Administrative & support | 2023 |
| Apac Medical Limited | Health & social care | 2019 |