| A&G Enterprise Ltd | Hospitality | 2024 |
| A&G Ltd | Construction | 2022 |
| A&I Plumbing Limited | Construction | 2025 |
| A&J Chauffeurs Ltd | Transport & logistics | 2026 |
| A&K Venture Capital Ltd | Financial services | 2023 |
| A&N International Trade Ltd | Wholesale & retail | 2015 |
| A&P Drylining Ltd | Construction | 2019 |
| A&R Mercantile Ltd | Wholesale & retail | 2025 |
| A&S Worldwide Ltd | Information & communication | 2017 |
| A&T Bespoke Ltd | Real estate | 2023 |
| A&T Property Development Ltd | Real estate | 2025 |
| A-Comp International Ltd | Administrative & support | 2015 |
| A-Z Complete Care Ltd | Administrative & support | 2023 |
| A.B.V Southeast Ltd | Wholesale & retail | 2013 |
| A.C.S. Acquisitions Limited | Administrative & support | 2002 |
| A.J. (UK) Ltd | Transport & logistics | 2011 |
| A.L.M.B Properties Limited | Real estate | 2020 |
| A.M.I Transport Services Ltd | Transport & logistics | 2026 |
| A.M.M Homes Limited | Real estate | 2024 |
| A1 Auto Center Ltd | Wholesale & retail | 2020 |
| A1 Autozone Limited | Wholesale & retail | 2020 |
| A1 Bodyshop Ltd | Wholesale & retail | 2010 |
| A1 Double Glazing London Ltd | Construction | 2017 |
| A1 Glass Design Unit Ltd | Manufacturing | 2024 |
| A1 Global Eduhub Ltd | Professional & scientific | 2021 |
| A1 Parts Ltd | Wholesale & retail | 2021 |
| A1 Plus Construction Ltd | Construction | 2019 |
| A1 Services Worldwide Ltd | Education | 2019 |
| A1 UK Builders Ltd | Construction | 2020 |
| A13 Carz Limited | Wholesale & retail | 2024 |
| A2Z Atlas Security Ltd | Administrative & support | 2023 |
| A4TAX UK Limited | Professional & scientific | 2025 |
| A6UFE Limited | Public administration | 2022 |
| A7 Works Limited | Construction | 2026 |
| A9 Solutions Ltd | Wholesale & retail | 2026 |
| AA Business Management Solutions Ltd. | Professional & scientific | 2012 |
| AA Holding Services Ltd | Real estate | 2021 |
| AA Selling Limited | Wholesale & retail | 2021 |
| AA Serve Ltd | Extraterritorial | 2019 |
| AAA Accounting Ltd | Professional & scientific | 2007 |
| AAA Builders Ltd | Construction | 2021 |
| Aaaa Property Services Limited | Real estate | 2022 |
| Aafiyah Enterprises Ltd | Real estate | 2023 |
| AAG Facades Ltd | Construction | 2024 |
| Aahar Ltd | Hospitality | 2024 |
| AAJ Trading Ltd | Wholesale & retail | 2013 |
| AAK Technologies Limited | Information & communication | 2018 |
| Aamaron Ltd | Real estate | 2018 |
| Aamera Limited | Wholesale & retail | 2023 |
| Aamor Limited | Wholesale & retail | 2018 |
| Aanu Bori Ltd | Manufacturing | 2021 |
| Aara Solutions Limited | Information & communication | 2023 |
| Aarey Compliance Ltd | Information & communication | 2014 |
| AAS Care Services Limited | Administrative & support | 2026 |
| Aayaw Ltd | Wholesale & retail | 2018 |
| AB Land Developments Limited | Construction | 2014 |
| AB London Limited | Wholesale & retail | 2018 |
| AB Online Store Ltd | Wholesale & retail | 2023 |
| AB Plant Hire UK Ltd | Other services | 2020 |
| AB Vent Ltd | Construction | 2014 |
| ABA Services Limited | Real estate | 2025 |
| Abaa Global Ltd | Wholesale & retail | 2024 |
| Abad ITR Ltd | Wholesale & retail | 2025 |
| Abayon Ltd | Wholesale & retail | 2024 |
| Abbas Children Wear Ltd | Wholesale & retail | 2025 |
| Abbey Business Solutions Ltd | Transport & logistics | 2024 |
| Abbey DE Law Firm Ltd | Professional & scientific | 2021 |
| Abbey Jenkins Consulting Ltd | Information & communication | 2025 |
| Abbey Road Developments Limited | Construction | 2017 |
| Abbey Supermarket Limited | Wholesale & retail | 2022 |
| Abbey Ward Community Association Limited | Other services | 2011 |
| Abbeygold Homes Ltd | Real estate | 2025 |
| ABC Chocolate Ltd | Wholesale & retail | 2025 |
| Abchak Properties Ltd | Real estate | 2025 |
| Abdaal Ltd | Agriculture & fishing | 2025 |
| Abdul Curry Box Ltd | Hospitality | 2025 |
| Abdul Khadeer Properties Management Ltd | Construction | 2025 |
| Abdulayo Ltd | Health & social care | 2018 |
| ABH Express Limited | Other services | 2026 |
| Abhiverse Ltd | Information & communication | 2024 |
| Abib Plumbing and Building Management Limited | Construction | 2017 |
| Abie Sams Limited | Health & social care | 2015 |
| Abigail Joseph Consultancy Ltd | Professional & scientific | 2018 |
| Abiglobal Foods Online Ltd | Wholesale & retail | 2023 |
| Abiglobal Foods Wholesale Ltd | Wholesale & retail | 2019 |
| Abil Consultancy Ltd | Professional & scientific | 2013 |
| Abimjeph Ltd | Health & social care | 2023 |
| Abisco Ltd | Other services | 2020 |
| Abjl Ltd | Real estate | 2026 |
| Able Kind CIC | Administrative & support | 2013 |
| ABM Labs Limited | Manufacturing | 2025 |
| Abrant Turk Ltd | Construction | 2017 |
| Abravo Ventures Ltd | Real estate | 2024 |
| ABS Adige Services Ltd | Administrative & support | 2022 |
| ABS Courier Services Ltd | Transport & logistics | 2020 |
| Absolutely NOT Ltd | Wholesale & retail | 2022 |
| Absta Ventures Group Ltd | Professional & scientific | 2018 |
| AC Heating Ltd | Construction | 2022 |
| AC Interiors Ltd | Construction | 2025 |
| AC5 Constructions Ltd | Construction | 2026 |