| Amor Baby Limited | Wholesale & retail | 2021 |
| Amor Electrical Installation Ltd | Administrative & support | 2015 |
| Amore Cakes Co. Ltd | Manufacturing | 2025 |
| Amore Desserts Ltd | Manufacturing | 2020 |
| Amore Investments Ltd | Real estate | 2019 |
| Amorsi Ltd | Professional & scientific | 2019 |
| Amoudi Cargo Ltd | Transport & logistics | 2014 |
| Ampere Electronics Ltd | Manufacturing | 2013 |
| Ample Homes Limited | Real estate | 2017 |
| AMR Ahmed Consulting Ltd | Professional & scientific | 2024 |
| AMR Trans Ltd | Transport & logistics | 2026 |
| Amran Consulting Ltd | Wholesale & retail | 2018 |
| Amrinder Risam Ltd | Construction | 2024 |
| Amrish Ltd. | Wholesale & retail | 2014 |
| Amrit Interiors Limited | Administrative & support | 2023 |
| Amrit Kitchen & Bedrooms Ltd | Administrative & support | 2015 |
| Amrit Singh Limited | Real estate | 2025 |
| Amritesa Limited | Administrative & support | 2011 |
| Amritpal SINGH2 Ltd | Construction | 2024 |
| Amritsar Properties Ltd | Real estate | 2025 |
| Amritsar Property Limited | Real estate | 2025 |
| Amritsari Kulcha Ltd | Extraterritorial | 2019 |
| Amritsari Tandoori Kulcha Ltd | Extraterritorial | 2019 |
| Amrtech Ltd | Professional & scientific | 2025 |
| Amrubbishclearance Ltd | Water & waste | 2021 |
| AMS International Trade Limited | Wholesale & retail | 2025 |
| AMS Properties PVT Ltd | Real estate | 2020 |
| Amsadiq Ltd | Wholesale & retail | 2026 |
| Amsha Technologies Ltd | Information & communication | 2013 |
| Amtal Limited | Administrative & support | 2020 |
| Amtechie Limited | Information & communication | 2023 |
| Amun BAL Limited | Administrative & support | 2024 |
| AMW & Co. Ltd | Professional & scientific | 2019 |
| Amworld Holdings Limited | Administrative & support | 2007 |
| Amworld UK Limited | Transport & logistics | 1986 |
| Amyandangel Ltd. | Real estate | 2015 |
| Amyra & Abeer Limited | Hospitality | 2023 |
| AMZ & Co Properties Ltd | Real estate | 2021 |
| AMZ Care Ltd | Health & social care | 2018 |
| Amzoo Driving School Ltd | Education | 2023 |
| AN AAM Foods Ltd | Wholesale & retail | 2023 |
| AN Cloud Solutions Limited | Information & communication | 2026 |
| AN Eco Workers Ltd | Construction | 2023 |
| AN Sweets (Slough) Ltd | Wholesale & retail | 2014 |
| AN Technologies Limited | Information & communication | 2015 |
| ANA Courier Limited | Transport & logistics | 2015 |
| Ana's Bake Studio Ltd | Manufacturing | 2024 |
| Anamorphic & Co. Ltd. | Construction | 2020 |
| Anamta Enterprises Limited | Wholesale & retail | 2021 |
| Anamtec Limited | Professional & scientific | 2010 |
| Ananta Ayurveda Ltd | Manufacturing | 2023 |
| Ananta Eluxe Ltd | Manufacturing | 2025 |
| Ananta Real Estates Ltd | Real estate | 2025 |
| Anante Limited | Information & communication | 2008 |
| ANB Care Services Limited | Health & social care | 2025 |
| Anchor Pest Control Services Ltd | Other services | 2011 |
| Anckly Ltd | Wholesale & retail | 2019 |
| AND Maintenance Ltd | Administrative & support | 2022 |
| Andas Consultancy Limited | Other services | 2014 |
| Anderson Property Agents Limited | Real estate | 2009 |
| Andlu Estates Ltd | Real estate | 2024 |
| Ando Screeding Ltd | Construction | 2022 |
| Andp Ltd | Real estate | 2022 |
| Andradie Day Service CIC | Education | 2025 |
| Andrea Kilbride Ltd | Professional & scientific | 2025 |
| Andreib Trans Ltd | Transport & logistics | 2018 |
| Andrew Tansley Limited | Construction | 2012 |
| Andy CEE Leadership and Business Consultancy Limited | Professional & scientific | 2025 |
| Andy Fern Designs Ltd | Administrative & support | 2011 |
| Andy's Burgers Slough Ltd | Hospitality | 2026 |
| Anfal PVT Ltd | Information & communication | 2013 |
| ANG Creative Services Ltd | Administrative & support | 2015 |
| ANG Portfolio Limited | Real estate | 2025 |
| ANG Property Services Limited | Construction | 2015 |
| Angad Construction Ltd | Construction | 2023 |
| Angel Beauty Care Ltd | Other services | 2025 |
| Angel SS Ltd | Manufacturing | 2014 |
| Angela House Keepers Ltd | Other services | 2022 |
| Angels Care Recruitment (UK) Ltd | Administrative & support | 2018 |
| Angie-Dusty Ltd | Health & social care | 2019 |
| Angled Developments Limited | Construction | 2019 |
| Angleiron Limited | Professional & scientific | 1999 |
| Anglo Frozen Foods Ltd | Manufacturing | 2000 |
| Angolo a SUD (UK) Limited | Hospitality | 2008 |
| Angtax Accountancy Services Limited | Transport & logistics | 2024 |
| ANH 19 Limited | Real estate | 2024 |
| Anik Essentials Limited | Wholesale & retail | 2026 |
| Anil & Aiza Ltd | Real estate | 2017 |
| Anila Amira Ltd | Wholesale & retail | 2022 |
| Animation Group Ltd | Real estate | 2019 |
| Animation Kitchen Ltd | Information & communication | 2023 |
| Anis Health Ltd | Health & social care | 2011 |
| Anisanj Limited | Real estate | 2018 |
| Anisanj Training Solutions Ltd | Administrative & support | 2021 |
| Anish Real Estate Ltd | Real estate | 2025 |
| Anishka Consulting Ltd | Information & communication | 2022 |
| Anisk Solutions Ltd | Information & communication | 2016 |
| Anita Lettings Ltd | Real estate | 2023 |
| Anita Sandhu Limited | Information & communication | 2013 |
| ANJ Haulage Ltd | Transport & logistics | 2020 |